Submitted on 4/21/2019 Review title of AbrahamNeeds work but gets the job doneIt's kind of annoying that you can only use.wmv files in the free version but it only means you have to take a couple steps to convert.mp4's to.wmv files. The service works pretty well but the user interface needs a little more accessibility such as adding an off button in the launcher. Lets hope the author adds these important features soon, it would definitely sell more licenses.Thank you for your timeRaul, WA4TPR 73's to the HAMS out there! Active wallpaper windows 10.
Active5 years ago
We get PDF's from our professor to read for homework but they're often scanned documents, is there a way to adjust the contrast of the text to make it easier to read?
Edit: I've got Photoshop but is there a way to do it from a PDF reader?
Jun 05, 2017 Adjusting contrast in a PDF document with multiple pages. When creating PDFs with 100+ pages, people often use photocopiers that don't offer contrast/levels settings to fix the contrast at time of scan. I guess 300+ dollars for Adobe Acrobat Standard isn't enough to include something advanced like Adjust Contrast, Darken, Lighten, etc. Click a thumbnail in the grid of the adjustments panel to preview the change in brightness. Similarly, select Contrast and Exposure tab and click a thumbnail to adjust the same.
Edit2: Windows XP, 7 ** Windows or Ubuntu Only **
wag2639
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10 Answers
You can try this:
Go to Edit>Preferences>Accessibility
This will not change the true contrast, but you can pick contrasting colors of your choice, or one of the defaults, as in the screenshot.
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You could try Imagemagick - it's a graphics manipulation program that can read and write PDFs too.
There are a few command line options that may help - for example: -normalize, -contrast and -contrast-stretch
Try something like:
convert original.pdf -contrast new.pdf
More info and examples on the site.
Linker3000
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Under OS X, you can use slhck
ColorSync which is installed by default. There are many filters, and one is for decreasing contrast.
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AntoineAntoine
What I did was change the color of the text by going to edit menu, clicking on preferences and then the accessibility tab. You can customize the color for the document text. It doesn't do anything for the images, but at least you can see the text on a dark background.
AshAsh
I saved it as a Microsoft Word file in Acrobat Reader. Then I opened the Word Document and adjusted the brightness and contrast of the image until it was readable. It makes for an expensive print, but it works.
BMKBMK
If you open it in Photoshop and resave as a PSD file you can or if you want to apply on all pages, do the following:
If your pdf is locked, you will not be able to perform this operation.
r0car0ca
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I've run into this as well. for some reason version 5 of the reader seems to work as expected. I think it might be something in the creation, but I've not tracked it down yet.
Richard JuneRichard June
I changed contrast with PDFClerk. It has a lot of filters in there, when exporting PDF.
holmsholms
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You can use the graphics card or monitor settings to handle this.
See this post as well.
For that you could use a system wide gamma/brightness/contrast setting; usually if you have a modestly advanced graphics card, its control panel will have options to change gamma / contrast / brightness / hue. e.g. NVIDIA control panel, ATI Catalyst Control Center/Panel etc. It will affect the the whole system, but you can always change it back when you're done viewing the file.
Mehper C. PalavuzlarMehper C. Palavuzlar
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You can also try Nuance Paperport (I got this 'free') with my Brother MFC scanner/printer.
Essentially if you have a dark grey font on a light grey background (a low contrast scan), then you tell it to 'stretch' the dark grey to black and the light grey to white. This is done by setting the black/white points as follows:
Now you can manually set the while/black points for finer control
Adobe Reader Vs Adobe Acrobat
I used this to create a legible black and white PDF from a scan that was originally black text on dark blue paper (that scans as a very low contrast)
DeepSpace101DeepSpace101
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protected by BinaryMisfitNov 8 '10 at 11:19
Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
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This Guided Edit is a walkthrough on adjusting the brightness, contrast, and color in your video clips. To adjust these settings in your video clips using this Guided edit, follow these steps:
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