Adjusting contrast on grayscale pdf image

On Photoshop 6.0 I was able to adjust the contrast of a grayscale pdf image by going to image-adjustments-brightness/contrast,increasing the contrast, hitting ok. I could then save the image file. I just obtained Photoshop CS3 and things do not work that way. I do not see any change when I increase the contrast. However, I see an increase in contrast when I lower the brightness, but when I click ok, the contrast goes back to where it was.
How do I increase the contrast and save the image?

I'm sure I've asked this before, but why don't you use code tags?

Similar Messages

Adjusting contrast in a PDF document with multiple pages

I have seen a question asked several times in various forums and it never gets an answer: how do you adust the contrast and brightness of a scanned PDF if it has several pages? You can't do it in Acrobat, and there are no third-party tools that I've found that work. If you have Photoshop, there is a solution to the problem, which does not require adjusting every page in a document. I use a high-speed duplex hopper-fed scanner to copy books or articles I need for my school work (no, I don't violate copyright by giving them away). There is no way to adjust contrast at the scanner level, so I end up with a 700-page document that is too light or too dark.
1. Use Acrobat to extract all the pages to separate files.
2. Use Adobe Bridge Tools>Rename to serially rename all the pages, so that Photoshop sees them in the right order and they can be reassembled later. There are other free or cheap tools for batch renaming that work equally well.
3. Experiment with your settings on a sample page in Photoshop, until you find one that works. I usually use auto-contrast, or adjust the curves myself.
4. Perform whatever other manipulation you need to on the document page, such as resizing or changing mode to greyscale.
5. Create an action following the same steps.
6. Run a batch process on all the pages in your undone folder, saving them to a done folder. Override the Open and Save settings to avoid dialogue boxes and so on.
7. Reassemble the document from the individual pages using the Combine function in Acrobat.
I use this method frequently, making small adjustments to the action as necessary. It takes a while to do a large document, but it solves a lot of problems. One problem that is very hard to solve, however, is caused by scanning cheap paper, which makes the scans come out blotchy and grey, and very hard to re-contrast without losing resolution. Acrobat can help solve this problem sometimes with the Optimize Document functions, but in general, it's easier to scan better, whiter paper than rescue it later. One solution is to scan only one side at a time, and then use a third-party PDF tool to interleave the pages.
If you have a lot of documents to do that can use more or less the same settings, create a Droplet macro in Photoshop and drag your page folders to it, instead of running a batch.
Hope that helps.

Thanks for posting your solution.

Greyscale image, can't adjust contrast/levels.

A very recent problem - I have some greyscale scanned images - nothing fancy, batch-scanned via document feeder at 600 dpi - and my problem is this: I try to adjust contrast or levels, I see the effect I want in the image as I do so, but when I dismiss the contrast/levels dialogue, the change doesn't 'stick'.
I can delete parts of an image, paint-bucket for example works fine, I can save. I expect it's something obvious :(
OS X 10.3.9, Photoshop CS2. Memory is 1.25Gb (yes, I'm a lightweight ;) )

No. What I'm saying is they are
i like
bitmap mode, in that scanned grayscale images of line or halftone pics tend to have very little gray information. It's made mostly of black or white pixels. So Level or Curves adjustments have little effect. In addition, you will get a FALSE preview on any Level/Curves adjustments on these types of images when viewed at less than 100%. Just as you describe.
Same thing would happen if you took a detailed 1-bit file and converted to grayscale. The Levels/Curves adjustments would be available. A preview at less than 100% might show that Levels are lightening or darkening. But when you commit the command, the adjustment seems to disappear! That is because you only have 0 or 255 pixels, you can't lighten white and you can't darken black and there are no pixels in-between to affect.

Adjust Contrast in PDF files

Hello,
I have a huge searchable PDF file (300+ pages, 40+ MB; it is
a scan of an early 20th century book I need for my work at
university). Everything works fine, but the pages appear somewhat
too bright. It's hard to read them on screen.
Is there any way to increase the contrast of my
300-dpi-grayscale-PDF-file? I extracted some pages and edited them
in graphic software, just increasing contrast 20 %. The pages are
perfect now - but I am not happy about the perspective doing this
300 times, and I have some more scanned books that could need a bit
more contrast...
I tried to convert the pdf file to monochrome. But the result
does not look very nicely.
Thanks in advance
Zaphod

Thank you for the post .
This forum is especially for Acrobat.com issues , in case you
have any issues with Acrobat Product kindly refer Acrobat user
forums
Here is the link :-
http://www.adobeforums.com/cgi-bin/webx/.3bbeda8b/

Low contrast on scanned pdf

I have a large number of documents that appear to have been scanned on grayscale. The background is white, but the text is gray and difficult to read.
Is there an easy way to increase the contrast of the document in pdf form?
So far, I have been able to print the document, and using the printer settings I can print high contrast, and darken the image, but then I have to re-scan it. This is a waste of paper and time.
I can also save it as a tiff, but it splits into multiple pages, then I have to fix each page and recombine into a pdf. very time consuming!

Thank you for your response.
I tried many of the existing options, the only thing that seems to work is going to tiff, fixing the color, then going back to pdf.
It seems like a long way around, I was just hoping for a better way, or at least a way to automate this.

Trouble creating grayscale PDF

Hi!
I have a bunch of grayscale PDS-files, dot grain 20%, that I need to make into a grayscale PDF. This has proven more difficult than I expected. I did a PDF from Bridge with "Output"-"preserve embedded color profile" checked, but it seems that didn't do much. The printing place said it reads like a colour PDF.
Then I tried Acrobat Pro, first to make a new PDF file from my images, and then to convert my earlier Bridge-PDF using "Preflight" - "convert colour to grayscale". That made the images low resolution and dark. The file size went down from Bridge's 140 MB to 45 MB.
Finally I gave InDesign a shot, but I lack the skills to do much with it.. If I put some effort into learning InDesign, will I be able to export one single PDF-file, with the original (or close to it) resolution and tone values, and with a grayscale colour profile?

Thanks for the quick response! They are Photoshop files, saved in Photoshop format. I have also saved the images as hi-res JPEGs with colour profile "dot grain 20%" and tried to do a PDF from those in Acrobat, same problem=dark, low-res, pixellated.
I'm using MacOS 10.6.8 for Acrobat XI, Bridge CS5 and Photoshop CS5, and have access to a PC laptop with InDesign CS6 on it.

Cannot export to PDF with grayscale PDF in layout

IDCS5.5, MacPro, OSX 10.7.4
I am working on a grayscale teacher’s guide that accompanies a CMYK schoolbook. The introduction pages contain miniature pages of the workbook (formatted as grayscale PDF), but InDesign refuses to output those pages as PDF ("Impossible d’exporter le fichier PDF"), or when it does produce a PDF (when exporting page by page), Acrobat warns of a possible problem and stuff is missing on the resulting page, not necessarily from the grayscale minipages.
I have tried grayscale PDFs created from the original CMYK PDFs in Acrobat Pro X, grayscale PDFs exported from the original CMYK file in InDesign CS6, PDFs reduced to 20% in InDesign, PDFs reduced to 20% with a third-party application and imported in ID at 100%, and all sort of variations on the export values. The problem is also present in InDesign CS4 (after exporting the file as IDML) and in CS6.
The thing is, there is no problem at all if I use the CMYK PDF version of the minipages (I then turned the resulting PDF into grayscale with Acrobat Pro X). But the printer expects to see only grayscale images in a grayscale job, not color... and a Photoshop version of those minipages is not acceptable.
Has anybody encountered that problem? Can you reproduce it, i.e. can you export to PDF if you use any type of grayscale PDFs in your layout?

FOUND IT! Inspired by Rob solution, I was able to export my InDesign CS5.5 document containing some grayscale PDFs to PDF/X-3:2002 (and PDF/X-1a:2001), with or without the standard, but without converting to destination. For some reason, it does not work with PDF/X-4:2008, nor with any of the other presets.
-3

Printing IDCS3 File with Placed Grayscale PDF...

My client has sent me a grayscale PDF which I have imported into an IDCS3 file. When I run this to my imagesetter as a Composite Gray file selected in the Print Dialog box, it will run blank CMY plates as well as the K plate which will have the image on it. I can't seem to disable the sending of the unwanted CMY plates.
I can also choose to run this as a Separations and select just the black plate but then the grayscale pictures seem to lose their depth as it is just running the black element of what is probably a CMYK or RGB image that has been converted to look Gray.
Can anyone tell me how I can run the file as a Grayscale file and just the Black plate go to the imagesetter?
Many thanks,
David

Change the Colour dropdown from Composite Grey to Seperations. Then turn off the plates you dont want.
Sorry should have read your whole thread.
Yes you will have to convert the file to greyscale in Acrobat to fix your problem.
Also try printing Composite Unchanged. That might get you the result you are after.

When I adjust contrast (for ex.), the version turns dark purple or black

After successfully importing hundreds of RAW files, aperature has suddenly lost its mind ... When I adjust contrast (up or down), the version will become dark purple or go to black black (image disappears and version is a black rectangle). The same thing happens with most all of the adjustment sliders. Has anyone experienced this?

No, I have an nVIDIA GeForce 6800 Ultra
As I stated, Aperature has been working well for me (except for spot and patch bug). I've been using it since release time and am (was) very pleased with the results.
I have loaded the update and will archive the library and reload V1.0 to see if I can get to square zero

Extremely slow display of imported PDF images

We have been using imported PDF images in FrameMaker for many years now with great success. However, something happened a few weeks ago that now causes several of our machines to take an extremely long time to display PDF images. For example, a 200KB imported PDF image that previously took less than 1 second to render now takes 14 seconds. It is now almost impossible to work with many of our documents, which contains 100+ images.
This has happened on several of our PCs running FrameMaker 8 (via the TechComm suite). These machines have the following software configuration.
FrameMaker 8.0p277
Adobe Acrobat 8.1.3
Windows XP Professional SP3
We have also disabled all plugins, but there is no difference - the problem still persists.
However, there is one machine in our office that is not affected. It has the following configuration.
FrameMaker 8.0p277
Adobe Acrobat 7.1.0
Windows XP Professional SP3
Is it possible that Acrobat is affecting the PDF import? Or is it recent changes to XP? Or something that has been updated in the background?
Any assistance is greatly appreciated.
Steven Teasdale
GE Multilin

In practical terms, you can always toggle the display of graphics off in FM, but that doesn't work for all situations.
A few things to check:
Did you optimize the PDFs when they were created? (You'd still want to avoid downsampling and compression, but optimization still reduces the size.)
Also, a lot of the graphics processing is memory-intensive, so you should be using machines that are loaded up with RAM and have healthy open space.
Finally, if it happens consistently, the machines' anti-virus programs may be screening everything every time each file is opened. So adjust those settings... That's easy to test for too -- just shut it off and try an import.
How heavily are the servers being hit by other applications and users, and how fast is the network? Not being able to serve the files quickly enough is another chokepoint.
Move a book with Bruce Foster's Archive plugin to create a local copy and test with that to see if the problem is actually FM and the local machine, or something outside.....
It may also be worth checking to see if the computers have the lastest graphics card drivers loaded too.
Art

I am trying to use the brightness adjustment on a grayscale photoshop CS6 file. The preview shows the adjustment working and changes the brightness, but when you click to apply the change, it does not apply the adjustment. I have run into this problem b

I am trying to use the brightness adjustment on a grayscale photoshop CS6 file. The preview shows the adjustment working and changes the brightness, but when you click to apply the change, it does not apply the adjustment. I have run into this problem before, although rarely, with some other files over the years and with earlier versions of CS. I would like to know how to overcome this problem?

Make sure you are viewing your image at 100%. At smaller views, pixels and layers and the way they interact are approximate interpolations and won't show you the actual pixel-for-pixel changes.

Color of adjustment brush in grayscale

hope someone can help me out,
I would like to get the colors of the color picker in the adjustment tool in grayscale,
how can i get it, i see only colors and white.
thanks
Davy

Davy,
It's a colour picker, never a greyscale picker.
With saturation set high, whatever colour you pick gets mixed with the original colour under the brush.
With saturation set to 0, whatever colour you pick replaces the underlying colour.
To paint with grey, you need to set the saturation to 0 and not choose a colour for the brush. Even there, you'll not be able to paint with a uniform grey. The darkness will be determined by the underlying darkness of the image and the exposure and brightness sliders.
Basically, it isn't a painting tool. For that, you'll need to go to a pixel editor.
Hal

Grayscale pdf output from Illustrator (?)

Some of my real estate clients want me to do grayscale versions of their flyers in addition to the color version sometimes. Is there a way to take a cmyk pdf that was output from Illustrator (complete with vectors and images, etc) and output to a new grayscale pdf correctly? There seems to be no way to do that in Illustrator aside from editing them within the app (not the best way). Illustrator does a bad job with converting embedded/linked cmyk bitmap images to grayscale...they end up over-saturated and look incorrect.
Converting all vectors is easy with Ai CS3's Live Color, so no worries there. I'm just looking for an easy automated way to do this from the cmyk Ai file.

Mr. Met wrote:
I thought that only applied to CS4 and/or snow leopard thing. I have CS3/OS 10.4.11 and have no problems printing to postscript.
Right, it's a problem in Snow Leopard. It looked to me as if you were answering the question of what method to use in Snow Leopard, and print to PS is problematic. For that matter, the result is the same if you print to PS and distill or do it in one step by printing to PDF if you use the same settings, so unless you use a watched folder for distiller, I can't see any reason to use two steps.

Unable to display a PDF image on the page - Mac 10.6

Hi,
Running an iMac with 10.6.8 and Indesign 5.0.4. Just wanting to export a PDF as per usual via File > Export function. However, I keep getting the error message, "Unable to display a PDF image on the page'. No idea what this is and have never seen this error before. The only info on the internet reveals error code 0x2511(9489).
I've deleted prefs, closed down and re-opened Indesign and even restarted the computer. I've also re-linked the images contained in the document and even created a new document and set it up the same, but still the same problem. Investigating further, other Indesign documents still export properly.
The only ones that don't export are 2 documents, both giving this same error message. Both documents are ones where a client has sent a PDF, I've imported into two of these into an 2-page A4 Indesign document (each PDF is 48MB each) and then just added a text layer (using Times) which is properly installed on the computer. I basically have to 'update' course dates for the client and add PDF to the website, all very basic.
I've tried importing a jpeg and other PDFs into the file (replacing the existing ones) and they export fine.
All my software is legal and I've exported this document before now in exactly the same File > Export without any problems (under 10.5 and 10.6).
OK... I've just imported the offending PDFs into Acrobat, optimized and shrunk the file size, re-imported back to Indesign and the PDF export works fine. So it seems InDesign / PDF Export doesn't like large imported PDFs? I think they were originally exported from Publisher, so maybe that's the problem or a file conflict somehow.
Any ideas on the culprit? I've googled it, searched these forums and Apple discussions and haven't found anything. Although I've found a workaround, I do get large files to import and then export. Thanks for any help
Steve

It does sound like a problem with the original PDF files the client sent you. You can check how they were made in Acrobat Pro from the Additional MetaData button on the Description tab of the document properties dialog. It will be under Advanced at the bottom of the list when the metadata opens.
You might be able to salvage them by running the optimzer and not changing the size, or just doing a Save As in Acrobat.

How to read ZIP files(having PDFs,Image) using MQ Series link for R/3

Hi,
1)Is it possible to transfer a zip file (having an image or pdf) using IDocs in SAP 4.6C using MQ Series link for R/?
Scenario: "MQ Series link for R/3" converts Business-Reports from a third-party software,into SAP IDocs.Each Business-Report contains one XML file and one ZIP file.
2)Being on ABAP side,do I have to worry about how the zip file would be converted into IDocs?
Detailed descrption:
This scenario requires integration of a non-SAP software which talks in XML with SAP R/3(4.6C).The customer has decided to go with 'MQ Series link for R/3' (which integrates any non-SAP application running on IBM MQ Series to R/3,by converting data(in any format) into IDocs).He is not ready to go for XI.
The Problem area is a functionality which requires the non-SAP software to send XML file along with an attached Zip file.So,XML document,basically,has a 'zippedFile' XML element having actual file in XML keyword 'file'.
This XML document ideally, should be converted by the subsystem(MQSeries link for R/3) into IDocs i.e. into a stream which could be stored in a table on R/3 side and later, sent back to the non-SAP software through MQ Series link to be converted into zip-file again with corresponding pdfs,images.I want someone who has worked in a similar scenario to confirm this.

Hi,
I have a feeling I have posted this question in the wrong forum or maybe I will let you decide this.Any help would be appreciated (even the right forum name).
My scenario requires integration of a non-SAP software which talks in XML with SAP R/3(4.6C).The customer has decided to go with 'MQ Series link for R/3' (which integrates any non-SAP application running on IBM MQ Series to R/3,by converting data(in any format) into IDocs).He is not ready to go for XI.
The Problem area is a functionality which requires the non-SAP software to send XML file along with an attached Zip file.So,XML document,basically,has a 'zippedFile' XML element having actual file in XML keyword 'file'.
This XML document ideally, should be converted by the subsystem(MQSeries link for R/3) into IDocs i.e. into a stream which could be stored in a table on R/3 side and later, sent back to the non-SAP software through MQ Series link to be converted into zip-file again with corresponding pdfs,images.I wanted someone who has worked in a similar scenario to confirm this.

Adjusting contrast on grayscale pdf image

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