Gamma Correction - always necessary (?)

Has anyone else had a problem with their gamma curves being seemingly whacked after going through Compressor for DVD? I've been dealing with this for the last three years and haven't seemed to find anyone else on the web with the issues I've got. Maybe I'm seeing things.
I've been working with Varicam and XDCAM HD footage primarily. I've found that every time I export to m2v without any Gamma Correction filter adjustments, the video looks more milky and faded when viewed in the DVD Player application (after going through DVDSP) compared to the way it looks in FCP. But the m2v file looks fine when playing it though QuickTime Player. When I apply a Gamma Correction filter in Compressor to compensate for this milkiness, I get a great picture in DVD Player, but in QuickTime, it looks a little dark.
Am I compensating for something I don't need to be compensating for? The reason I feel like I need to be compensating is because when I play regular store-bought movies on DVD Player, they don't have the same milky look in their blacks as I see in my exported files. And I know I'm not supplying milky footage because my deepest blacks are at or very near 0 IRE, and it looks great in FCP and QuickTime.
Anyone know what's going on? I've had this problem through all generations of FCP/Compressor/DVDSP that I've worked with for the last three years or so.
Is the problem really just with DVD Player and I'm worrying over nothing?

Hi! I have experienced the same issues. I so happy i finally found one person with the same problem. I have also used the gamma correction and i am pretty happy with the results. As to why i get this milkiness, i have no idea. I am afraid of actually using this gamma correction thing, because i feel my settings are feirly random at times. How much do you normally correct?
Anders Holm

Similar Messages

Why Levels mid-point slider and Exposure Gamma Correction slider not the same?

Both the mid-point slider in Levels and the Gamma Correction slider in Exposure adjustment appear to modify Gamma. They even use the same numeric scale.
When Gamma <= 1, both sliders appear to produce the same results (confirmed with a couple of random sample settings and using the Difference blend mode).
When Gamma > 1, however, the results are very different. Levels produces more what one would expect in terms of moving the Gamma curve without moving the white and black points but the Exposure Gamma Correction slider seems to do something very different, either moving the black point or applying a very different curve the produces much brighter tones in the dark shadows.
Can anyone explain why and how these two adjustments produce different results?
Is this a bug with the Exposure adjustment?
By the way, in my limited tests of this I was just using a standard RGB file in 16-bit mode - nothing fancy like 32-bit or LAB or anything like that. Also, Photoshop CS6 Extended. Both 32- and 64-bit versions show the same behavior.
Thanks.

The differing gamma adjustment results also occur in the OS X version of Ps 13.0.1
The situation is worse than you realize, Dennis. Test with a linear grayscale gradient in 16-bit or 8-bit RGB mode instead of arbitrary images. Remember to view at 100% zoom for an accurate display.
Gamma adjustments of less than 1 performed by Levels adjustment layer and Exposure adjustment layer do differ but to a less obvious extent than when the adjustment is greater than 1. Differences can be seen in histograms, and low level differences when differencing layers can be made more obvious by adding an Exposure adjustment layer with the exposure increased.
You'll get further different results by using the gamma adjustment in the "Exposure and Gamma" method of Image > Adjustment > HDR Toning. Notice that the gamma value there has to be specified as the inverse of that in Levels and Exposure.
I haven't bothered to calculate which, if any, of the three gamma adjustment controls gives correct results because that is Adobe's responsibility.
It's quite ridiculous that a common routine giving consistent and correct results isn't being used for all these gamma adjustments. Code re-use makes software more robust, simpler to test, simpler to correct, leaner and overall easier to manage. But what do I know.

Error correction always on - bad for undamaged tracks?

I still have a lot of CD's that I still want to import. They are of varying quality. Most have been kept in binders, and depending on where they are in the binder, they are more or less scratched. No doubt some will have audio errors if I import without correction, while most probably will not.
What I don't want to do is import them all without correction and discover flaws at random weeks or months from now, and always worry that there are more lurking in my library that I haven't uncovered yet or will only hear when I play it on better equipment. I want to import everything once at high quality and never do it again, put my CDs in dark storage, and port this data around from drive to drive, computer to computer, pod to pod, for the next 70 years and then pass it on to my children.
I am inclined to leave error correction always on so that I'll be always covered if there are errors. My question is this: does this slightly degrade to good data that contains no errors? Does error correction somehow reprocess everything and somehow guess as to what's an error and what's not, and then reconstitute the final as it sees fit? Or is it very good at recognizing and correcting only true errors?

so no data loss? Slow is ok, as long as it's automated (which it is). One slow import is about 10 times faster than one fast import + errors discovered later + reimporting + deleting bad files and rebuilding playlists, etc.

Quicktime MPEG IMX 625/50 export - how to disable gamma correction?

Hello,
Since there seems to be no support for encoding an MPEG IMX stream into a Quicktime container out of the box in Premiere CS5.5 I have managed to cheat IMX in there by using Quicktime component files from a Final Cut Pro installation. This seems to work fine, I now see all kinds of IMX options under the Video Codec section in Quicktime export, but there is one problem...
There is no way to edit any codec settings to turn off Quicktime Gamma correction, as you can do if you are exporting to Apple ProRes. What happens is - I need to add a Gamma Correction filter to every timeline to make it darker, because the default encoder settings automatically include some gamma correction that makes all rendered videos slightly brighter than they should be. This is a bit annoying.
Does anyone know if there is a way to disable Gamma Correction for MPEX IMX Quicktime files? Also, when will Adobe include native MPEG IMX encoder support? A lot of broadcasters in Europe (especially Eastern countries) still use IMX as their codec in their playout facilities - sometimes in Quicktime containers and sometimes in .mxf containers. Premiere needs to supports this.
Thanks!

Hi JS,
Thanks for the reply.
I can do but they're big files (about 2 to 3 gigs each - long takes!) so would take a while. I'd have to do it tomorrow now coz they're on a hard drive at the office.
John

Console to GUI, Gamma correction Woes

Is there any way in Linux that I can make gamma adjustments in an application basis? Switching between dark console fullscreens to a bright white browser window as fast as hitting a key combination is killing me! (I'm using i3).
I'm not sure I will be able to handle it. However I cannot make global gamma adjustments because that will damage the contrast of the console, and very few X applications include gamma correction settings (I only found one so far, Links2).

Currently I'm using xgamma on a couple of scripts. One of them restores to my normal settings, the other sets a darker screen. I bind the scripts to a couple of keys on i3. This works fine, but I was hoping for something more automatic.
The difficulty in hooking to an application is that I've set the browser to open on another workspace, so xgamma kicks in and I may not even want to go to the browser just yet. I also can't seem to find a way to bind the xgamma action to the changing of workspaces (that would in fact be the ideal solution), so switching back to a darker workspace doesn't restore the gamma.

Question about gamma correction

I recently ordered prints from iPhoto that came directly off my Canon EOS Rebel XT (at max quality). The resulting photos looked very much as if they were printed at PC gamma correction rather than at Mac gamma.
Is there something else I need to set in iPhoto to get the gamma I expect?

Catherine:
Welcome to the Apple Discussions. Do you have your monitor calibrated so the 2.2 gamma? I've done that and prints now look more like the monitor presentation. I've set the monitor to the sRGB profile with the 2.2 gamma.
Do you Twango?
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've written an Automator workflow application (requires Tiger), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 08 libraries. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.

Printing and Gamma correction

I read somewhere in the aperture manuals to match the monitors gamma in prints you may need to set gamma correction to 1.1 or 1.2 in the print dialog.
If I am exporting prints to a pro photo lab am I likely to need to correct the gamma of the exported image or should I send it uncorrected?
Also, should I generally have black point compensation on or off?

I've this code :
short[] threshold = new short[256];
for (int i = threshold_level; i < 256; i++)
threshold[i] = (short) i;
BufferedImage dest = new BufferedImage(source.getWidth(),source.getHeight(),source.getType());
LookupTable look = new ShortLookupTable(0,threshold);
BufferedImageOp buff = new LookupOp(look,null);
buff.filter(src, dest);but I don't know what it's really change, if it's the input level of the BufferedImage, the gamma, the twice...
So to compare I used a commercial Software and I seen that my result is corresponding to a change of the input level of my BufferedImage and a gamma correction too. But i just want to change the input level of my BufferedImage, but I don't find example wich does that, so I try to make a gamma correction in the aim of cancel the first gamma correction produce by my LookupTable.
I hope you understand me. The aim is to make an histogram modification of a BufferedImage.
thank you

FCP Gamma Correction

This isn't something that can really be answered, I just wanted to vent a little frustration about the way Apple handle the display gamma with FCP.
From my understanding, Apple assume (and advise) that monitors are set to 1.8 gamma when running FCP, video shown in the viewer and canvas windows is then shown darker to resemble a 2.2 gamma which is how most other computer users see it, although the actual footage remains unaffected.
That's all well and good, except that I use a 2.2 gamma already because I want to see content in the same way as the majority of computer users in all my apps, and because FCP is making the video look darker I'm no longer seeing realistic results when using it. Apples recommendation to use a gamma of 1.8 to get around this seems like madness to me, why can't the gamma correction be turned off in the FCP user preferences?
At the moment I have to export quicktime files and view them outside of FCP to see what they really look like without the fake gamma correction, and then blindly make adjustments in FCP and repeat the whole process until I get the result I'm looking for - hardly a good way of working.
Apple, please give us a check-box in the preferences to stop this forced gamma change.
Paul.
Message was edited by: Videotrader

Hi Fergus
If your concern is regarding the gamma calibration of your apple display then open up the OS X System Preferences > Dsiplays pane, Choose the Color tab for the appropriate monitor and press the Calibrate button ... in the first window of the Display Calibrator Assistant don't turn on Expert Mode, just press Continue, the very next screen allows you to set the target gamma, either the Mac OS standard gamma setting of 1.8, or the PC/TV standard gamma setting of 2.2 ... step through the remaining settings and save / use your new calibration profile.
As to your actual question ... go to admit that I don't know mate! But if FCP does indeed make adjustment for your display gamma settings, it will do it with reference to your displays calibration.
All that said, your gut instint is correct, you should NOT be using your apple dispaly for making critical color correction decisions. It's totaly wasting your time. You can only make reliable critical color correction decisions when using a properly calibrated reference monitor
Hope that helps
Andy

Gamma Correction

I have a large number of family photos which I have scanned and stored as TIFF files. Now that I come to print them, I have found that the gamma needs correcting on all of them to make the prints come out right on the printer I have (Canon MG6300). Is there any software, Adobe or any other, suitable for this job?

No, gamma correction can't be done simply by adjusting brightness and contrast. I have videos that are too dark, and increasing the brightness only changes them from murky black to murky gray. But when I saved a still frame and looked at the image with the Mac's "Preview" application, whose Image Correction tool includes a "gamma" adjustment, I found that I could expand the range of black shades to approximate a decent-looking picture. Try it yourself and you'll see what "gamma" does.
MPEG Streamclip is a good program, though. I've used it to fix videos with faded color or poor contrast.

Help with Gamma correct rescaling

So apparently Photoshop does not correctly account for Gamma when re-scaling an image, which can change the overall brightness in a noisy image:
http://www.4p8.com/eric.brasseur/gamma.html
http://www.kiransprojects.com/blog/2014/photoshop-blending-is-broken/
Is there any kind of solution in the works? Scaling does the right thing when working in 32-bit mode, but when creating things like textures for games, most work is in 8-bit mode, so switching to 32-bit mode every time I need to resize my image is not feasible.

Exactly! in a default 8-bit image the colors are gamma encoded, but when Photoshop re-sizes the image it treats it as if it was a gamma 1.0 image.
So if I have an image that has a lot of high frequency details like this UI bar:
if I then scale it down in Photoshop (which I would do if I was making an IPhone app that needed retina and non retina images, or if I just like making my images at a higher resolution and then scale them down when finalized), I get this:
when I should be getting this:
I got the second image by turning my image to 32-bit mode and then re-sizing it, which preserves the brightness in the blue area. The difference is subtle, but here is a side-by-side:
The first one is when re-sized in 8-bit mode, the second one is re-sized in 32-bit mode. you can tell that the image on the right preserves the brightness of the blue part, while on the left it gets darker.
In most cases the effect is not noticeable, but in some cases it can be very destructive on small patterns. I think most people who use Photoshop don't understand or care about the difference, but when I've explained it to my co-workers, they all agree that the expected behavior is that re-sizing should preserve the visual brightness of the image. At the very least there should be some sort of option to do gamma corrected re-sizing in 8-bit mode.

The hoverover actions are not playing back correctly always

Hello,
I am developing manual test scripts using MTM2013. I see that hover over actions doesn't always play back correctly. The application has two levels of hover over levels in the sense i have to click on main hover over link which has multiple hover over links
and then several links for the second layer of hover over links.
Any suggestions on how to record and payback correctly consistently.

Hi Starain,
First of Thank you very much for looking into it.
I have following features on Data Diagnostics on.
1.ASP.NET Client Proxy for IntelliTrace and Test Impact and Intellitrace.
2.When trying to configure ASP.NET intellitrace and test impact, it gives this message.
3.When MTM gives that exception and gives option to close, it doesn't capture anything.
4.I went to view Results for the test, i don't see anything captured.
5.Can you tell me where is this Even viewer you are mentioning to look into?
6.In mtm log file, I have configured as below as i have mentioned in another thread. Do you still recommend to go into the blog you mentioned above and set up as given in that.
Please confirm that i ahve to still set uptrace file as mentioned in blog given in above thread and iwill go a head and try it.
<system.diagnostics>
    <switches>
      
      
      <add name="UITestTraceLevel" value="4" />
      <add name="EqtTraceLevel" value="4" />
      <add name="TestManagement" value="4" />
      <add name="TeamBuild" value="4" />
      <add name="TeamFoundationSoapProxy" value="verbose" />
    </switches>
    <trace autoflush="true">
   <listeners>
   <add name="myListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="C:\temp\MTM_Trace.log"   />
   </listeners>
   </trace>
</system.diagnostics>
</configuration>
Thanks again.

Final cut pro gamma correction

Hello.
I bet people have posted this before but after searching I could not find a concrete answer.
I have FCP 6 and Color 1.5. My display gamma is at 2.2. I edit my cut in FCP and send it to color. No problems there. I color correct in color and it looks good. I render out a quicktime. Then send the sequence back to FCP. The FCP previews it really dark. I can't do anything to change that. I go to check the rendered quicktime and it's fine, looks the same as color. If I render the final out of FCP it's also dark. This is kind of driving me crazy. Can anyone help?
Thanks.
Joey

Not that I know of. They aren't designed that way. Color is designed to send a proper signal to an external monitor. FCP is just there to show you the picture, the best it can, so that you can edit. Neither are designed for color correcting for the web.
Shane

Is a BOM always necessary?

Hey Guru's
Is it necessary to have a BOM when you use ETO? What happens if you don't?
If you don't use a BOM in ETO then how do you know what to take out of the inventory?
Is there a difference on how SAP uses the BOM in MTO, ETO, Disc. manu, rep. manu and Process industries?
If it is not necessary to use the BOM, what is then used, and what is the significance of that?
Sincerely
Nina

Hi Nina,
I thought this mighht be useful to you.
It was compiled from a lot of helpful people from here and other sites.
Please let us kno wwhen we can be of any assistance.
What is the difference between MD04 and MD05?
MD04 Transaction shows the actual Stock/Requirement situation while MD05 shows the situation at the time of the last MRP run. That date is also displayed on the screen.
Validation of Accounting Document Type in MIRO
Check in User Exit EXIT_SAPLMR1M_004 (Enhancement LMR1M001).
Source of Supply Determination during PR Creation
Check in User Exit EXIT_SAPLMEQR_001 which is called in the ME_SEARCH_SOURCE_OF_SUPPLY. For further details, check in Question 6 of OSS Note 457110.
Source of Supply Determination during PR Creation
Check in User Exit EXIT_SAPLMEQR_001 which is called in the ME_SEARCH_SOURCE_OF_SUPPLY. For further details, check in Question 6 of OSS Note 457110.
Source List Maintenance without Info Record
To avoid the maintenance of source list maintenance without info record, make sure the Message Number 06 341 shall be set as 'E'.
Services PO on hold
It is not possible for SAP to hold the Services PO. For further details, check in OSS Note 380296.
Pricing condition maintenance in Outline Agreement
If you would avoid any change in the pricing conditions of the outline agreement during maintainance in Transaction ME31K, then make sure the Activity Code '3' shall be set for Authorization Object V_KONH_VKS.
PR Document Type Determination when converting planned order
It is of the SAP standard functionality that only 'NB' Document Type is assigned to the PR during conversion of planned order into purchase requisition. For further details, check in OSS Note 46919.
PR Document Type Determination during MRP run
The Document Type determination for the PR is made during MRP run using the MRP Group via Transaction OPPZ.
PR Deletion while PO is active
To avoid the deletion of purchase requistion line items while the PO document (with reference to this PR line item) is active, make sure the Message Number 06 152 shall be set as 'E' via Transaction OME0. For further details, check in OSS Note 521174.
PR Creation with reference to Scheduling Agreement
PR can be created with reference to another PR and can't be created referring to a PO or Scheduling Agreement. PO & Scheduling are created and controlled by Purchasing Organizations. PR can be created by end-users. Yet, requisition will be generated referring to Scheduling agreement when MRP is run. In this case, source list must be maintained for that item-vendor combination & the MRP shall be properly set. Selection Parameter '2'.
PO Price Default from PR Price
Follow the OSS Note 393367 describing how to use the EFB settings to control the PR price coming into PO.
1. First, use Transaction Code OMET to set up the new function authorization for Buyer;
2. Tick on the 'Order Price Adoption' field.
3. Select the 'Maintain Users' to insert EFB into Parameter view.
PO Price Default from Material Master
If we wish to have the Price Determination to use the cost price from the Material Master as we create the Purchase Order, then create the new Condition Type (which could be based on the standard Base Condition PB00). This Condition Type must not have any Access Sequence assigned to it and must have the Condition Category 'G'. The Calculation Schema must have this new Condition Type as the first Condition Type (replacing PB00). For further information, check in OSS Note 496720.
PO Document Type Determination in ME59
The OSS Note 114213 details the determination of PO Document Type during automatic creation of purchase order from purchase requisition.
Planned Delivery Costs maintenance in the PO
If the planned delivery costs need to be assigned to material valuation, you just enter them under conditions for the specific material. However, if you need to assign the costs for defined account, you need to create an item line for the delivery costs and buy them as text for defined account assignment. Depending on acct. assignment specified for the item, you then fill in the needed accounts in item details, tab account assignments.
Multiple Functional Tips and Hints
0001 - FI/CO IMG - Configuration Menus
The following IMG Configuration Menus work on all versions up to 4.7 Enterprise:
ORK1 - Profit Center Accounting
ORKA - Internal Orders
ORKE - Profitability Analysis
ORK0 - General Controlling
ORKS - Cost Center Accounting
ORFB - FI
ORKL - Reconciliation Ledger
ORFA - Asset Management
These Tcode will open IMG/Configuration related menus.
MRP Area Set Up Configuration
The MRP Area is purposely used if we would like to control the material requirement planning at the lower level than the default plant level. Subject to the Type of MRP Area (which is defined in Transaction OMIZ), the MRP Area will correspond to the whole plant or the storage location or to a subcontractor. If the MRP Area Type is selected as at the Storage location level, then you will assign the storage location to the MRP Area in the storage location field. As far as the MRP Area configuration is concerned, there have been three main Transactions you should use:
1. Activate MRP for MRP Areas (Transaction OM01)
2. Define MRP Areas (Transaction OMIZ) and
3. Define Scope of Planning for Total Planning (Transaction OM0E).
MPN Missing in RFQ, Contract or Scheduling Agreement
The MPN functionality is the same for both types of transactions with the exception that in the Enjoy transactions you have fields Manufacturer part number and Manufacturer. The only way to have a preferred MPN number when creating a document is only having a relationship one-to-one. This is just possible in the purchasing view of the internal material or just have one MPN material assigned to an Internal material. For further details, check in OSS Note 663302.
Mass Maintenance via MEMASSPO Transaction
Function Module ME_LIMIT_FIELDS_PO contains all non-changeable fields for the mass change of the Purchase Order. In addition, the following item fields can not be changed with existing items â
1) Material Number (EKPO-EMATN)
2) Material Description (EKPO-TXZ01)
3) Purchase Order Quantity (EKPO-MENGE)
4) Order Unit (EKPO-MEINS)
5) Net Price (EKPO-NETPR)
6) Purchase Order Price Unit (EKPO-BPRME)
7) Plant (EKPO-WERKS).
For further details, check in OSS Note 501853.
Mass maintenance of Purchasing Info Record
Use either Transaction LSMW or Program RM06IBI0.
Mass maintenance of MRP Area
Go to Program RMMDDIBE. Both 'Material Number' and 'Plant' number range should be entered. Go to 'Set/Reset Deletion Indicator' tab page and enter the proper entry in the 'MRP Area' and the radio button to set deletion flag.
Invoicing Plant Configuration Set-up
The invoicing plan enables you to schedule the desired dates for the creation of invoices relating to the planned procurement of materials or services independently of the actual receipt of the goods or actual performance of the services. It lists the dates on which you wish to create and then pay the invoices.
You have the system create the invoices automatically on the basis of the data in the purchase order, thereby triggering payment of the vendor. It is also possible to enter the invoice for an invoicing plan manually.
There are two kinds of invoicing plan: Periodic Invoicing Plans and Partial Invoicing Plans. Both types are available as of SAP R/3 4.0A.
To be able to work with invoicing plans, the following conditions must be satisfied:
1) Maintaining the settings in Customizing for purchasing (for example, invoicing plan type, date categories, date descriptions, and date sequence proposals). The path is IMG ---> Material Management ---> Purchasing ---> Purchase Order ---> Invoicing Plan ...
2) The Purchase Order item must have an account assignment
3) The 'AutoEvalGRSetmtDel.' indicator must be flagged in the Vendor master record for automatic settlement utilization.
4) The Framework Order (document type FO) must be used. This document type requires that a validity period be entered in the PO header. This specification is adopted in the invoicing plan, provided that this has been predefined in Customizing for the relevant invoicing plan type.
5) The LIV must be used.
How to set the PR field mandatory when creating PO
Use Transaction Code OMET Create a new entry, give it a name and tick :-
1) Ref. to PReq;
2) Ref. to P.O.
3) Ref. to quotation.
Next, you've got to associate via SU01 and click Parameters, insert a new parameter id EFB to the authorization code. Type in Parameters value you want e.g. XX You have to assign the control for ALL the SAP buyers via the SAP users id.
How to block the unused storage location?
1) Restrict the users from posting any material document by maintaining authorization check at storage location level. Use path in SPRO - Materials management -> Inventory Management & Physical inventory -> Authorization Management -> Authorization check at storage location.
2) If you are using external procurement, go to the MRP2 View of the material master and maintain the field 'Storage loc. for EP'. This will default the storage location to the planned order or PR and then on to the PO. Upon the receipt the material will be received to the correct storage location. You also need to move existing stock from the old location to the new location by material transfer 311, remove the bin location and mark the old storage location for deletion.
3) Use Transaction Code MM06 to set a deletion flag for material at storage location level. This shall be done for all materials that have this storage location that can be found by checking the table MARD with SE16. As well the message M7 127 from warning to error message (transaction OMCQ) must be changed.
Goods Receipt up to current date for Scheduling Agreements
The implementation of OSS Note 741385 will enable the posting of GR for Scheduling Agreement Delivery Schedule with delivery date in the future.
Goods Receipt for Scheduling Agreement Delivery Schedule
The OSS Note 741385 details how to enable the posting of GR for Scheduling Agreement Delivery Schedule with delivery date in the future.
External Delivery Note for Goods Inbound Delivery Document
The OSS Note 520534 details the possibility of external delivery note in the Inbound Delivery Document.
Difference between VAX and VAY
The account grouping VAY is used for account determination for the offsetting entry for inventory posting (Account Key GBB) if the posting is assigned to the cost account-related object (cost center, order, project, profitability segment etcâ¦). Otherwise, the account determination is carried out with account grouping VAX. This procedure was chosen since the posting with a cost account-related account assignment is only possible to the G/L account which is a cost element. For further details, check in OSS Note 77764.
Difference between MB5B and MCBC
The MB5B is the Transaction Code for Material Valuation Analysis at the Plant level whereas the MCBC is the Material Valuation Analysis at the Storage Location Level. In case of Standard Valuation, the MCBC (or MC.9) does not reflect the valuation in the Material Master Data Records.
Determination of GR/IR Clearing Account
Check in Enhancement LMR1M002 which includes User Exit EXIT_SAPLKONT_011. This User Exit is called by the F. Module MR_ACCOUNT_ASSIGNMENT. The disadvantage of this User Exit is that the program will determine the GR/IR Clearing Account based on this program (which is referring to the Purchase Order Data) and therefore, we have to assure the same GR/IR Clearing Account is to be posted during Goods Receipt and Invoice Receipt posting. For further details check in OSS Note 301477 and 165692.
BOM explosion for Subcontract Scheduling Agreement
The explosion of the BOM is subject to the calculation of the requirement dates. The details of such calculation logic is seen in OSS Note 196684.
Automatic Source of Supply Determination for services without service master record
Set out below are necessary steps to be done/set up in the system -
1) Maintain the purchasing master data record (contract) for material group;
2) Go to IMG -
External Services Management -
Source Determination and Default Values -
for Purchasing Organization where the 'Material Group at Item Level' indicator checkbox shall be activated.
Once the PR is created for your service item, using Transaction ME57 will enable you to make the automatic default of source of supply into the PR line item.
Auto Source of Supply Determination in ME56 Transaction
Check in Program RM06BZ10.
Account Posting Differences - GR before IR and vice versa
1) With GR before IR: The GR is done at PO price and the invoice will check the price and revaluate the materials if necessary. In this particular case, we may get postings for the revaluation of existing stock and/or postings for the price difference in case (part of) the stock is no longer there. Furthermore, GR will hit the cost object on the PO item (ie. cost center, order number or stock) and posts $ to the GR/IR clearing account for the plant used on the item; whereas
2) With IR before GR: the GR is done at IR price. In this case, we don't have these differences except in case of subsequent debit/credit postings. IR hits the GR/IR clearing account and posts $ to the Vendor account. If there is a difference in the amount in the GR and the invoice amount, the difference will post back to the cost objective.
Account Posting Difference when GR before IR and vice versa
1. With GR before IR: The GR is done at PO price and the invoice will check the price and revaluate the materials if necessary. In this particular case, we may get postings for the revaluation of existing stock and/or postings for the price difference in case (part of) the stock is no longer there. Furthermore, GR will hit the cost object on the PO item (ie. cost center, order number or stock) and posts $ to the GR/IR clearing account for the plant used on the item; whereas
2. With IR before GR: the GR is done at IR price. In this case, we don't have these differences except in case of subsequent debit/credit postings. IR hits the GR/IR clearing account and posts $ to the Vendor account. If there is a difference in the amount in the GR and the invoice amount, the difference will post back to the cost objective.

Response.setContentLength() always necessary when writing to OuputStream?

Hi All -
I have a situation where I have a proxy servlet between my Portal and various back end systems. Different sub-classes of this Servlet work to proxy different back end systems. The main task is brute-force URL rewriting.
I'm working in a Portal 9.2.2 environment.
Basic flow: Read InputStream from back end system via HttpURLConnection, write InputStream to StringBuffer, replace URLs as necessary in the String, get ServletOutputStream via response.getOutputStream(), write modified String to OutputStream, call flush on OutputStream.
The odd issue I'm seeing is:
Use Case 1:
After doing my URL rewriting - the length of the output is shorter than before.
If I call response.setContentLength(lengthOfOutput) my proxied page does not render - although no error is thrown.
If I do not call response.setContentLength(lengthOfOutput) everything renders just fine.
Use Case 2:
After doing my URL rewriting - the length of the output is longer than before.
If I call response.setContentLength(lengthOfOutput) everything outputs just fine.
If I do not call response.setContentLength(lengthOfOutput) my page does not render - an exception is thrown that the output exceeded the stated length. (this makes sense)
It seems to me that I should be able to call setContentLength every time - but that's not working out...if anyone has any ideas I'd love to hear them.
Thanks in advance!

hi
when we had to do a similar task, we had suppresed Content Length.
However unless you are streaming the output , you seem to have all the data in memory in order to rewrite the URL's in which case there is no reason why you cant output the correct content length (dont rely on the content-length the backend server is sending, you have to set the content length after your manipulations and take care of the encoding your using).
Browser's generally work OK with no content length but give you problems with incorrect length , and the BEA code also throws up exceptions. Either suppress this value or output the correct one.

VF0070 gamma correction - for experts...

I am using VF0070 for image analyzing - my aim is to take RGB spectrum image and transform it into reflective spectrometer graph.
I'm encountering problems regarding on how colors as seen at the computer screen are different from their REAL RGB.
I'm taking the R,G,B pixels and make a conversion to YUV for using the Y values.
I'm measuring the Dark current and subtracting it.
My reflective spectrometer algorithm is correct but still my measured graphs are not like the should appear according to the reference graphs....
my questions are:
1. What is the gamma value which is equal to 1 ? meaning NO correction... the values in VF0070 are 0 to 100.
2. What is the Non-Linearity equation of this camera?
3. How can i correct the measured color spectrum to be like the reference of the same color ?
If i knew what the camera and the driver is doing to the real color i will be able to correct the spectrum reading to be real.
If someone can help with his knowledge, I would appreciate it very much.
Thank you very much
Ofer

Ken, there's a whole part of this that isn't stated but is obvious now. You are playing back this video as a movie on the computer screen (and therefore projector), rather than as video...
So from the start it is seriously degraded by being projected that way - in resolution, gamma, and "temporality" (lack of interlace support). And yes, it would then also be affected by differences in how Macs and PCs treat their display gamma.
My comments were aimed at a situation where one can really address maximimum quality for the situation. From the above that won't be the situation here. But you can still make improvements.
You are still taking this seriously, so here's my updated advice:
Don't change anything about the production or output - keep editing to a calibrated CRT.
Do a thorough calibration of the projector as a computer monitor. The PC should have a system for this. Calibrate both color and gamma under the normal viewing conditions. The actual calibration could be on the projector and/or in the PC.
Now take bars from FCP through all your channels to where it gets played back on the PC. Use the playback software's controls to adjust the bars playback to work as close as possible to what a video display would. You won't get very close but whatever you can do will make a huge difference.
If your software doesn't have such controls, then either:
- get playback software that does, or
- (what I would do): decide the projector's role as a video display is more important than it's computer display, and adjust the projector to the bars.
If you really want to stun them, ignore all of this, get an actual CRT video projector and mount it in the room. Get a tape, disc, or true NTSC computer output device, and adjust to bars. The difference will blow you away too.

Gamma Correction - always necessary (?)

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