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Questions tagged [grayscale]

28 questions
21
votes
4 answers

Windows 10 is grayscale and color filters are off

So I was working on Windows 10, and my screen suddenly went from color to grayscale. I looked it up and all the websites mentioned the color filter and the respective shortcut (Control+Windows+C). When looking at the color filter setting though, the…
Plinth
  • 313
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11
votes
2 answers

Turn Windows 7 desktop into grayscale

Is there a universal way to turn Windows 7 Aero desktop, all windows, etc into grayscale? I had an option to do this in Intel video drivers on my old laptop, now I have NVIDIA and don't know how to replicate this effect. There might be a shader or…
Axarydax
  • 1,247
9
votes
5 answers

Preview Microsoft Word in Greyscale?

If I have a Microsoft Word document with colour images, but I have a monochrome printer, how can I preview the document in greyscale to verify what the printed document will look like?
Tripartio
  • 650
6
votes
2 answers

Automatically turn on grayscale mode in windows 10

I want grayscale mode to turn on at a specific time every day, then turn off automatically a few hours later. I know ctrl + windows + c can be used to do it manually but it would be great to automate the process such as turning on at 9pm and off at…
Devin Ersoy
  • 163
4
votes
1 answer

Windows 8 or Nvidia issue: Part of screen fades out to gray

I have this very weird issue that occurs on my machine, and it's easy to reproduce: Method 1: Go to Youtube or another video site play a video the rest of the screen fades out to gray The video element itself is still in color Method 2: Play a…
Cameron
  • 189
4
votes
5 answers

Laser printer does not print nice grey parts

I have Samsung ML-2850 and I'm wondering if the quality of greay areas could be better. This is an example print: As you can see, letters and black parts are pretty nice, but the part around the "6" should be filled grey. This is printed with…
lumbric
  • 858
3
votes
1 answer

Compressing Grayscale 8-bit PNG Sequences with ffmpeg

I typically deal with many high-resolution PNG sequences, many of which are RGB (24-bit) or entirely grayscale (8-bit). Because adjacent frames in the sequences are very similar, it is important that I compress them losslessly using a codec that…
EllipticalInitial
  • 1,800
3
votes
1 answer

How to convert pdf to grayscale through mutool (mupdf-tools)

I want to convert a pdf to grayscale using mutool. there is an option for grayscale in convert but i don't know how to run it there is no documentation, here is what i am trying to run $ mutool convert colorspace=gray input.pdf output.pdf but it…
Salal Aslam
  • 216
2
votes
1 answer

video size reduction by grayscaling it

When we convert a video into grayscale, all of its 3 colors (RGB) in a pixel are assigned the same number (instead of 3 different numbers). So theoretically we must have reduction in size almost by 66%. I know there is some metadata and sound data,…
living being
  • 1,106
1
vote
1 answer

How to calculate bytes need for an image with 256 level gray scale

When the size of a still image is 1,600 x 1,200 pixels and each pixel has a 256-level gray scale ranging from 0 to 255, approximately how many megabytes are needed at least to store five such still images? If the question said : a 1600x1200…
f855a864
  • 137
1
vote
0 answers

Convert a PDF to greyscale on the command line *without* bit rasterization

Strongly related to Convert a PDF to greyscale on the command line in FLOSS? My go-to command has been gs \ -sDEVICE=pdfwrite \ -dCompatibilityLevel=1.3 \ -dPDFSETTINGS=/printer \ -dBATCH \ -dNOPAUSE \ -dQUIET \ -dPDFA…
ivo Welch
  • 170
1
vote
1 answer

Windows 10 machine stuck in Greyscale mode

My lovely cat walked across my keyboard and now my Windows user profile is completely stuck in grey-scale mode. I have done all the typical things like disabling Color Filters, and checking Color Management. I have also checked my NVIDIA Control…
Colin Basnett
  • 141
1
vote
0 answers

NASA uses a program that takes their black and photos turned into color using a shade of gray for one particular

I have a a black & photo and I want to convert the shades of gray into individual colors. For example a storm cloud with all different shades of gray, I want to assign a shade of gray to one color or a range of grays to a set of colors
Fandeboris
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1
vote
1 answer

Mozilla build firefox 3.5.1 on Ubuntu issues with images going greyscale, and javascript not running

I got bored of waiting for them to update the version of firefox-3.5 in the repos (currently 3.5 RC2) to one of the final builds, so I downloaded 3.5.1 from mozilla.com and extracted it to a folder on my desktop. Then I changed my firefox shortcuts…
Macha
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1
vote
2 answers

Capture documents in bitonal, or grayscale then downsample

I'm about to embark on a document archival process. I'm going to spend a lot of good money to archive some paper (actually microfiche) to TIFF images. I have a choice of 300-dpi bitonal (2-bit, black/white) or 300-dpi grayscale (8-bit). Cost is the…
Jason R. Coombs
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1
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