Establishing White Point and Black Point

Hi,
How do I Establishing a White Point and a Black Point in Lightroom 1.4.1 and especially in Lightroom 2 Bata?
Thank You,
Hersul

The last post by OP might have closed this thread, but given the relative lack of activity on this and LR2 forums (summertime?) - I'll go a little deeper.
i White point
- If your white balance is right from the start, you just use the Exposure slider to set the white point. If not, first set the white balance - that effectively sets a preliminary white point for each channel separately, or, to be more precise, matches the right side of the histogram for each channel - then set the Exposure. So, with the white point you have complete control over the histogram, as well as over each channel.
i Black point
- here the situation is different. You can move the left side of the main (composite?) histogram using the Blacks slider, but there's no means for moving channels separately. In theory, with digital capture, there probably should not be need for this, blacks should be always black, so that's OK, but...
I once had a batch of pics scanned from film. The film was poorly developed so it has some strong brown-magenta cast in the shadows. In Photoshop it was a piece of cake to set the black point by dragging the left ends of each channel to the left edge of the histogram (heck, even Auto Level did a wonderful job). In Lightroom, there's just no way you can correct this, because you can't control the channels separately.

Similar Messages

Setting a White Point and Black Point

I would like to suggest for future versions of lIghtroom to have an ability to set the white point and black points similar to levels and curves in Photoshop. This would be in addition to setting middle grey in the white balance settings currently in Lightroom. I find that the method of using Threshold to find the closest white and black pixels and then using these points to set the black and white points in curves or levels provides a better way to fix a color cast than the methods available in Lightroom.

MB,
There is no real need for Black and White point eyedropper type tools in Lightroom. By holding down the Alt key while changing the Blacks or Exposure sliders the display will show the areas that are being clipped. This is much faster than looking around for the darkest and lightest areas manually. If you just like to click to taste (like using the White balance dropper) then forget the Alt key and just move the sliders until you get the desired look.
Remember that the problem with Photoshop is that there are so many ways to do the same thing that it has become difficult and bloated. Lightroom strives to keep the interface as clear as possible.

Setting White, Mid and Black Points in Camera Raw 7

I am using Camera Raw 7 and can not seem to locate where can you set the white, mid, and black points in Camera Raw with the eyedropper tool. It seems you have to create a new psd file in Photoshop to do this, which does not make much sense since it is a basic levels adjustment. I am batch editing a bunch of CR2 files, and I just need to select the black, mid and white points on a grayscale that I've shot in the images - is there a way to do this in Camera Raw 7? Thanks!!

ACR doesn’t work that way. There is an eyedropper for the overall white-balance that you can set by clicking on a relatively bright, neutral area, but there aren’t black and white-point eyedroppers. But, what is clipped black or white is determined by the output colorspace you have set at the bottom and you can get some idea of what will be clipped black and white by turning on the clipping indicators and watching for the areas you’d be eye-droppering on (the black and white patches in your grayscale) to start showing the clipping color overlay for black and white, but any further toning adjustments will move data in and out of what is darker than black and lighter than white so what is clipped for output will change as you fiddle with the various toning sliders.
The reason things are different: In PS, when you set a black-point and white-point in Levels and click Ok, the data below and above those is thrown away and that is the starting point for the next adjustment. In ACR, things are non-destructive and all the adjustments occur simultaneously, rather than sequentially as in PS, and no clipping occurs until you create the output file. This means that the pixels that are darker than your black-point and lighter than your white-point are still there, and can be moved into the black-to-white range if you do further toning adjustments. Having more headroom of the pixels that are outside the black-to-white range is good because you won’t get the posterization or banding that occurs when colors and levels are clipped after each adjustment in PS.
Can you describe what you intend your overall workflow to be on an image: how much adjusting will occur in ACR and how much, if any, might happen in PS, after the image is opened into PS from ACR, or opened from a file saved from ACR? There might be other ways to approach what you’re trying to accomplish.

White and black point vs ??

I never know which forum to post these things, so I'll start with the photographers.
 
 These three shots are as follows: (1) the camera raw version, (2) where I moved the sliders from the ends to approximately the beginning/end of the major portion of the histogram, and (3) using the threshold control to find the white and black points in the main part of the picture.
 
 Then, in the two adjusted versions, I lightened the image with the curves control.
 
 In both these cases, I used the grey dropper to touch the same spot on one of the rocks, to get the apparent neutral point.
 
 It seems to me that the threshold method to find the white and black points is preferred, based on the overall color and appearance of the finished adjustment.
 
 But, I've found on some images where the histogram has missing black and missing white, if I adjust the sliders to these two ends, I get pretty much the same outcome, as far as the contrast, color, and grey point.
 
 Could I have some advice on the preferred method to use in handling my image adjustments? Doing it the threshold method takes more time, and sometimes it's difficult to find the white and black points, or even the grey point.
 
 Thanks.
 
 Al
 
 
<a href="http://www.pixentral.com/show.php?picture=1SlEeG9kfwzD34gVOEcCbg7Ktp83p3" /></a>
<img alt="Picture hosted by Pixentral" src="http://www.pixentral.com/hosted/1SlEeG9kfwzD34gVOEcCbg7Ktp83p3_thumb.jpg" border="0" />
 
 
<a href="http://www.pixentral.com/show.php?picture=1tIEs4eAyKz4sxamyVaYRlKjTIIfKj" /></a>
<img alt="Picture hosted by Pixentral" src="http://www.pixentral.com/hosted/1tIEs4eAyKz4sxamyVaYRlKjTIIfKj_thumb.jpg" border="0" />
 
 
<a href="http://www.pixentral.com/show.php?picture=17K3ewFXsGo4K2uH5TGfO06CdVayyn1" /></a>
<img alt="Picture hosted by Pixentral" src="http://www.pixentral.com/hosted/17K3ewFXsGo4K2uH5TGfO06CdVayyn1_thumb.jpg" border="0" />

Yes the image was purposely underexposed. What I was trying to accomplish was to speed up the shutter speed to remove the slight blurring and compensate by pulling data from the shadows. Even though the lens has an image stabilizer the amount of light wasn't enough for a proper sharp shot.
this image is before touch up
These two images are F/5.6, 1/20, ISO 800
After touch up
Better lit scene but shows slight motion blur
This last image is F/5.6, 1/4, ISO 800
I believe that I will have to wait next year and hope I have a faster lens by then. I just don't think the 28mm-135mm f/3.5-5.6 lens is fast enough. I was trying this without a tripod to get in tighter.
Also I was taking these shots without the flash to get the drama of the tree lights.
What I would have prefer is a shutter speed of 1/125 or better as it helps with my hands shaking I believe the slowest should be 1/60
And the lower the ISO the better for noise.
These preferences are what I am used to with my Canon G3 that does not have IS.
I am getting so off track here, lol. But anyways, here are the pictures.

Recovery and Black Point on JPEG images

I'm not a big fan of trying to do much editing on JPEG images aside from non-exposure/white balance type stuff. I'll crop and straighten, etc.
My question pertains to (for those in the know) applying slight Recovery and Black Point correction to images that aren't shot in RAW format. A) will applying these slight changes having any effect (hopefully a positive one) on the images? B) if not, will it indeed have a negative effect?
Thanks for your time and expertise.
Mac

Jim,
Thanks for chiming in on a topic where I didn't expect to get many replies. All of your comments are well appreciated. I was basically asking because I was under the impression that unless your master is in RAW format, making adjustments to exposure, contrast and even recovery and black point would not do much and could even be detrimental to things such as skin tone, etc. I like to shoot in RAW for the reason of being able to have more fine control to adjustments, but for everyday shots and portraits I don't always go to RAW format since a lot of the time I have trouble getting the shot right with the manual controls. I also don't want the large RAW files for every shot that I take. Still, a lot of JPEG's need adjustments, even if just minor tweaks. The tweaks I make look fine on the screen, but I wasn't sure if they would look okay when printed out and I didn't want to spend countless hours making adjustments and spend (waste) money on prints that weren't going to come out good.
Anyway, that is the background to my thinking in making this post. Thanks again for chiming in.
Mac

Recovery, and Black Point Not Working in 2.0

I imported RAW pics from my old database (converted to 2.0). Wanted to try the new exposure adjustments, mainly recovery and BP. The HUD only lets me adjust exposure and brightness, the recovery and black point are grayed out and cannot be adjusted.
Has anyone got this adjustment to work? I am using the trial version. No, I am not in the preview mode. The master is Canon RAW from 40D.

Got it. Thanks! Just figured it out too that you need to choose the v2.0 RAW conversion on the RAW Fine Tuning adjustment toggle.
Recovery and BP adjust a lot more sluggish on my MBP w/4G Ram then it does in the tutorial video. This is concerning since in have only imported about 40 pics so far.
Time will tell.

Aperture2 - Recovery and Black Point adjustments question

I purchased the Aperture2 upgrade and, I'm impressed!!!
I have a question:
In the *Adjustment Tab*:
Two features in the *Exposure area, "Recover and Black Point"*, works sometimes and other times it does not.
There must be a reason for it - I just can't figure out why this happens. One would think that it should work all the time!?
Anyone know?

C and Scott, thanks so much for trying to help this old codger learn new tricks.
All the images I imported into Aperture2 are projects already completed and therefore I won't need to make adjustments to them. I was using them to test and learn the new Aperture2 features.
But, Just in case I ever need to convert a RAW image from A1x to the A2 format I'll know how to do it.
As I said before, as long as my new RAW images that I import directly into A2 have all the features available, I'm a happy camper. I won't be importing any images into A2 until after my shoot this evening, so, do you know if this is the case?

After resetting my phone to factory settings, it will not turn on. When i press the power button a white screen and black apple pop up. it stays on that screen and will not go to the home screen, it will just die. please help!

after resetting my phone to factory settings, it will not turn on. When i press the power button a white screen and black apple pop up. it stays on that screen and will not go to the home screen, it will just die. please help!

Make sure it is charged for about 10min using the adapter, then connect in recovery mode, explained in this article:
If you can't update or restore your iOS device

What is the utility of watch point and break point in ABAP DEBUGGING !

What is the utility of watch point and break point in ABAP DEBUGGING !
PLEASE TELL ME IN DETAILS AND IF POSSIBLE WITH SCREEN SHOTS !

Hi,
Breakpoints, Watchpoints, and Checkpoints
Summary
The standard Breakpoints tool is always located on the Breakpoints desktop. With this tool, you can manage breakpoints, watchpoints and checkpoints. In addition, you can monitor the current status of the different breakpoint types.
Detailed Description
Breakpoints
In the Breakpoints area, you will see a list of all the breakpoints set so far. If one of the breakpoints has just been reached, this is marked with a yellow arrow. The visibility (Debugger, session, user) and type (line, ABAP command, ) is displayed for each breakpoint.
If you double click the Navigation() column, the system will display the breakpoint in the respective source code.
The visibility of a breakpoint can be changed through the dropdown list. To change the visibility of several breakpoints, mark them and select the pushbutton Save as Session Breakpoint or Save as User Breakpoint.
You can change the visibility of all Debugger breakpoints using the menu path Breakpoints-> Save Debugger BPs as -> ....
In addition, you have functions for creating, changing, activating and deactivating breakpoints at your disposal.
Watchpoints
In the Watchpoints area, you will see a list of all the watchpoints set so far. The watchpoint last set is highlighted with a yellow arrow.
For each watchpoint you will see not only the current value but the value before the last changed. (Technically speaking, each time you create the watchpoint and each time the watchpoint variable is changed, a clone of this variable is created.)
In this way, you can always determine what changes have been made to the monitored variable. For complicated data structures, such as internal tables or structures, select the pushbutton Compare Variables( ) and choose the Diff tool to compare the old and new variable values.
In addition, you have functions for creating, changing, activating and deactivating watchpoints at your disposal.
Checkpoints
In addition, you can edit conditional and unconditional checkpoints using the Breakpoints tool. This function is provided in the new Debugger only. Conditional checkpoints are set first in the source code using the ASSERTstatement; unconditional checkpoints are set using the BREAK-POINT statement. These have the effect that programs will be continued only if a preset condition is fulfilled. In the following window, these checkpoints can be searched for, activated, or deactivated.
Pls refer to :
http://help.sap.com/saphelp_nw70/helpdata/en/e2/5f5a42ed221253e10000000a155106/frameset.htm
Regards,
Renjith Michael.

What is utility of watch points and break point in ABAp debugging !

What is utility of watch points and break point in ABAp debugging !

Hi,
Breakpoints, Watchpoints, and Checkpoints
Summary
The standard Breakpoints tool is always located on the Breakpoints desktop. With this tool, you can manage breakpoints, watchpoints and checkpoints. In addition, you can monitor the current status of the different breakpoint types.
Detailed Description
Breakpoints
In the Breakpoints area, you will see a list of all the breakpoints set so far. If one of the breakpoints has just been reached, this is marked with a yellow arrow. The visibility (Debugger, session, user) and type (line, ABAP command, ) is displayed for each breakpoint.
If you double click the Navigation() column, the system will display the breakpoint in the respective source code.
The visibility of a breakpoint can be changed through the dropdown list. To change the visibility of several breakpoints, mark them and select the pushbutton Save as Session Breakpoint or Save as User Breakpoint.
You can change the visibility of all Debugger breakpoints using the menu path Breakpoints-> Save Debugger BPs as -> ....
In addition, you have functions for creating, changing, activating and deactivating breakpoints at your disposal.
Watchpoints
In the Watchpoints area, you will see a list of all the watchpoints set so far. The watchpoint last set is highlighted with a yellow arrow.
For each watchpoint you will see not only the current value but the value before the last changed. (Technically speaking, each time you create the watchpoint and each time the watchpoint variable is changed, a clone of this variable is created.)
In this way, you can always determine what changes have been made to the monitored variable. For complicated data structures, such as internal tables or structures, select the pushbutton Compare Variables( ) and choose the Diff tool to compare the old and new variable values.
In addition, you have functions for creating, changing, activating and deactivating watchpoints at your disposal.
Checkpoints
In addition, you can edit conditional and unconditional checkpoints using the Breakpoints tool. This function is provided in the new Debugger only. Conditional checkpoints are set first in the source code using the ASSERTstatement; unconditional checkpoints are set using the BREAK-POINT statement. These have the effect that programs will be continued only if a preset condition is fulfilled. In the following window, these checkpoints can be searched for, activated, or deactivated.
Regards,
Renjith Michael.

How to delete the line between the last point and first point?

How to delete the line between the last point and first point?
I want to draw a curve many times, from first point to the end point. and redraw from first point to the end point.But I hope update point by point. but between the end point and the first point, there is a line. How to delete the line?
the code is:
CNiReal64Vector plotData(50);
m_graph.ChartLength = 50;
//m_graph.ClearData();
for (int j = 0; j < 2; j++)
for (int i=0; i<50; i++)
plotData[i] = ((double)rand()/(double)RAND_MAX)*6 + 4;
m_graph.GetPlots().Item("Plot-1").ChartXY(i, plotData[i]);
Sleep(100);
Attachments:
20150605142608.png ‏31 KB

Hi Kumar,
I think you can just delete it in the sales order directly, if you are using make-to-order scenario, then there will be special stock left for the sales order as the production has been goods receipt, you need to use MM transaction move the stock to unrestricted use stock. If you are using make-to-stock scenario, there should be no further problem. If you are using assembly order, please try to reject the sales order item to see if it could fullfill your requirement.
Regards,
Rachel

My ipods frozen on the white apple and black background page. I've tried resetting with the hold button, but nothing's changed. How can I fix this!?

My ipods frozen on the white apple and black background page. I've tried resetting with the hold button, but nothing's changed. How can I fix this!?

Try this...
Restarting your device
1) Press and hold the Sleep/Wake button for a few seconds until the red "slide to power off" slider appears, and then slide the slider.
2) Press and hold the Sleep/Wake button until the Apple logo appears.
Follow these steps to reset your device
Note: Reset your device only if it is no longer responding and the steps above do not work.
Press and hold the Sleep/Wake button and the Home button together for at least ten seconds, until the Apple logo appears.
Restart / Reset
http://support.apple.com/kb/ht1430

Management point and Distribution point behind netscaler for virtual ip/dns name

Is it supported to place a server behind a netscaler for using a virtual IP/DNS name?
We are looking into placing our distribution points and management points behind the netscaler to provide firewall functionality.
We would point our clients to a different DNS name for each individual MP and DP to provide routing through the netscaler.
As far as I know this is only possible using IBCM.
Please let me know if this is possible without IBCM internally.

Using a different DNS name is problematic as there is no way to specify an alternate fqdn for a site system on the intranet. Clients use the actual fqdn of the system hosting the role; this is given out by the MP directly to the client based upon the site
system's actual name.
You could manipulate name resolution in a variety ways so ultimately the actual IP used wouldn't matter, but that's useless unless the client is using the proper name.
If you you could use the same name and IP, then it should work no problem as long as the traffic is properly delivered to the site system. Ultimately, nearly all client agent to site system traffic is nothing more than WebDAV via IIS on the site system so
just basic web traffic.
Jason | http://blog.configmgrftw.com | @jasonsandys

IPad Air gets suddenly white screen and black apple

When I am working, my iPad Air gets suddenly (one or two times per week) white screen and black apple screen for a few seconds before I get back the control, anyone has the same problem?

It could be an OS issue but I would not bet on it. I just had a similar case myself (but white apple on black screen) on two unconnected devices almost simultaneously - both on an iPad and on an iPod touch. It is possible that there is something different going on here, perhaps at Apple's servers.
It could of course also just be a coincidence.

When I download a PDF, a user manual for instance, the page is black and the font is green, how do I change this to a white page and black script?

When I download a PDF, a user manual for instance, the page is black and the font is green, how do I change this to a white page and black script?

Try opening it with Adobe Acrobat Reader.
Note: Appleworks is the Apple office like application that stopped being able to run with Mac OS X 10.6.8. If you have a question particular to 10.9, I would ask in the 10.9 (OS X Mavericks) forum.

Establishing White Point and Black Point

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