Adjusting contrast

Is there a way to adjust the contrast before printing an adobe PDF document or image?

Okay. Thanks for the response.
Orshii

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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.

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

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.

How can I adjust contrast on Apple Support Sites, etc.

I have a great problem with Apple web content. Even this attempt to type my question is plagued by the same issue: There is not enough contrast between the letters I just typed, and their back ground. A big problem for me, as it seems the font color chosen by this apple web page and its background color chosen by this webpage, are creating an almost impossible eye strain and are terrible for people suffering from various forms of eye disease such as cataracts, makular degeneration, etc. I am one of them. I use Zoom for most of my computer work and generally can do everything on my Mac. Except change this lack of contrast on any website created by Apple web designers. Apple Update sites urging me to change my OS to Yosemite are completely unreadable to me! I need somebody to read its faded print to me. I dread to change to an OS that I probably cannot read because some web designer who want to design a contrast combination that is more "far out" than the previous one. There are millions having such eye diseases and computers are one way to let them enlarge and see things needed for their continued function. Contrast settings in Accessibilty Preferences do not alleviate the problem as they simply seem to make the screen brighter if increased.
Is there any Application that would let me change the contrast settings of a website designed by Apple?

Thanks for the hep I will contact the suggested Apple site. As a guy who worked with Apple computers since they were black and white pack-backs its nice to know that I am not the only one to notice that there is a big problem here.
I experimented again with the Accessibility Preferences/Contrast settings on my MacBook Air, and discovered that If I slide the indicator to the right to "Enhance Contrast", the opposite happens on my screen: I have less contrast so that grey fonts wash out into the white back-ground more and more as the pointer is moved to the right.
I never had to adjust the settings since I bought the MacBook with OS 10.6, and its function could have been reversed by OS upgrades since then o my present OS 10.8.5, or it could have been a problem since I bought the computer (used) from my Apple dealer.
I never had to adjust the contrast settings until now, since my eyes became weaker, and the Apple websites started using fonts of too similar a color to the background they are printed on.
So with that in mind it could be a hardware problem such as a reversed +/- wiring connection to the screen, a reversed diode on the motherboard, or a short in the diode wiring, a reversed OS code setting that reverses the direction of the contrast setting for its control.
It could also be Malware or a Virus, which has not been detected by the OS, nor the latest Norton on my Macbook Air..

How do I stop camera raw adjusting contrast and brightness automatically when I open any image

Every time I open in image in camera raw or Photoshop it is applying an automatic contrast and brightness setting. I have tried resetting to defaults with cntrl shft del but it doesn't make a difference. It also when I just flick through thumbnails on bridge. The pics look almost like they have a cartoon like filter on them!!any ideas on how I get it all back to normal it's been great in the past . I use cs3

Short answer, learn how to use the tool...
As for the "auto" adjustments, are you sure that's what's happening or are the images changing based on the differences between what the camera preview and the Camera Raw preview look like? If you have indeed somehow turned on the "Auto" adjustment and saved that out as a Camera Raw default, you can go into the Camera Raw flyout menu and choose the option to Reset Camera Raw Defaults. If however you are talking about the inherent differences between the way your camera renders raw and the way Camera Raw renders it, that's an entirely different discussion...
As for your other question, try rephrasing it as it doesn't mean a thing to me so I have no idea how to answer...

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?

Satego P100-491: How to adjust Contrast under Vista with Nvidia 7900 Go?

Hi
Can somebody help me ? How is it possible to modify the contrast on my new notebook Satego P100-491 OS Vista Nvidia
Gefore go 7900 gs Driver 7,15,10,9748. Following the help goto the Nvidia control panel option display and change the settings but there is menu for "adjust desktop color settings.
Thanks

Hi,
with that old XP drivers it was possible, but now.. you can try it with these color settings, but I am not sure if you would have that success.
I tried already to do some things like you (some Contrast, gamma, etc.) but I think they did not implemented that functions at the moment in the Vista drivers.
So, maybe we just have to wait...
Greets

When I use the and - keys on their own it used to adjust exposure (in develop mode) but now it adjusts contrast and i can't work out how out change it back to exposure?

How do you change + and - keys back to adjusting exposure rather than contrast? I can't find any documentation about this.
Thanks :-)

NO way!! thats os easy LOL thanks heaps, i really appreciate you responding :-) problems solved!!!! :-) cheers mate

Adjusting contrast on printer window 8620

There is very little contrast in the window showing apps and options for print, scan, fax etc. very faint and hard to read. How do I adjust the contrast so it is easier to read?

Hello @prkrgrp,
I'm sorry to hear that the touchscreen contract on your HP Officejet Pro 8620 e-All-in-One Printer is too faint for you to read it properly. I would like to assist you today with resolving this issue.
This may be a bit challenging as you're having a hard time reading your display, but the setting is altered on the screen for your printer.
On your printer screen, slide your finger to the left (like a touchscreen phone), until you see Setup
Touch Setup to access the Setup menu
Touch Printer Setup
Slide your finger down until you see Screen Brightness (should be your 5th option)
Touch Screen Brightness to access this menu
You will now see a scroll bar. Slide the bar over to the far right for the brightest screen display option
Once you settle on a screen that suites your needs simply select OK on the bottom right
Please let me know if these steps resolve your display issues. I look forward to hearing from you. Have a Happy New Year!
X-23
I work on behalf of HP
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
Click the "Kudos, Thumbs Up" on the right to say "Thanks" for helping!

Adjust contrast

Hello,
I have a MSI S420 laptop and I'd like to control the contrast of its screen. Unfortunately, only brightness can be adjusted through the keyboard. I tried ddccontrol, but it says that my monitor doesn't support DDC/CI. Only the Windows version of ATI Control Center offers controls to adjust the contrast. It's very annoying, the colors are all messed up. Is there anything else I could try?
Thanks for your help,
Gustavo

if you have Ati control center in Windows, you most probably have amdcccle. Try it.

Satellite 4300: Can you adjust contrast?

Hi All !
I've just bought an old 4300 Pro and whilst I can find the brightness control on the screen, I can't find any contrast adjustment. Can anyone advise please
( would prefer not to have solutions that involve removal of motherboard etc
- too depressing ! )
Thanks
#Pete

Barrie
Its got Windows 98 ( not sure if its 98 or 98SE ) I have just adjusted
Accessibility Properties to Show High Contrast in Settings - that seems to have helped a little. I'm sure theres room for improvement though ; - my last Laptop sittting next to me - lonely and discarded had far better contrast - - perhaps I should have just bought a brand new laptop - the only trouble is my 13 yr old daughter takes out her frustrations on the laptop - probably why the last one expired !!!
Thanks for the link anyway - perhaps the drivers need updating.....
Cheers Pete

20" ACD - Can you adjust Contrast, RGB, Luminance, etc?

Hi all -
I have a calibration tool coming my way (i1 Display 2). Part of the calibration instruction is to adjust brightness, contrast, color, and luminance of the device it's self (before profiling). However, the controls on the side only adjust brightness. Is there any way to adjust these other parameters of the actual LCD?
Thanks,
Thomas

For most LCDs, the only reasonable panel control for an LCD is the brightness control. Everything else should be altered by a custom profile. Controls that emulate the ones you find on CRTs can do more harm than good and are usually there for show. You'll find that generally, the more you pay the fewer controls are on the monitor. See this thread.

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/

How do I adjust contrast?

In PE I have imported a film from a camera mini disk which plays fine - right contrast before importing. But when I preview it in PE export from PE to an MPEG file for Youtube it is too dark. I try applying the image effect in PE but it only works when I double click the clip, not in the standard preview or when exported. I am probably being really dim here but I cannot see what I am doing wrong!

Bill,
Thank you for your patience! I have done what you say and successfully applied the effect to the clip. But my problem is geting that effect to happen in either the monitor pane or when I export the clip as an MPEG.
As I said I am probably being really dim here.

Adjusting contrast

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