Questions tagged [grayscale]

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

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 ...
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1answer
1k views

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 ...
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0answers
392 views

Why do some Microsoft Office drawing objects in PowerPoint print in different grayscale modes?

In PowerPoint 2016*, you can copy groups of Visio objects directly into a presentation, then edit them by right-clicking them and selecting "Edit Picture". A dialog will appear warning that the object ...
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2answers
749 views

Automatically turn on grayscale mode in windows 10 [duplicate]

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 ...
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3answers
4k views

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). ...
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1answer
531 views

Converting height map to Grayscale

I have a height map that I would like to convert to gray-scale. The problem is I have a custom palette or gradient that I wish to follow and I am not a professional, so I don't really know how. The ...
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1answer
75 views

How to deinterlace GRAY video and convert it to .avi?

I have binary data stream from analogue camera that contains even and odd frames. Right now I convert it to .avi with this, ffmpeg -f rawvideo -pix_fmt gray -s:v 700x220 -i data.bin -c:v rawvideo -...
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0answers
186 views

printer driver prints grayscale fonts as black

Canon iR-ADV 8285/8295 UFR II , Driver version 30.30.0.0 i am tried to print from ms word and ms access , the result is always black. printing from adobe acrobat is good , and also printing to ...
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2answers
1k views

Windows 8.1 makes one of my displays in grayscale. How can I fix it?

I just re-install windows 8.1 then I've installed Windows8.1-KB2939087-x64, Windows8.1-KB2975061-x64, Windows8.1-KB2919355-x64, Visual C++ Redistributable for Visual Studio 2015 and Google Chrome. At ...
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1answer
1k views

How to convert a color PDF document to grayscale without messing up black levels?

I've spent a long time figuring this out, tried to print from a bunch of different programs with all the profiles and setting I could find, to no avail. Situation: I have a multi-page PDF or whatever ...
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1answer
2k views

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 ...
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1answer
274 views

How to calculate bytes needed for a gray scale video

What is the minimum memory (in bytes) for saving five seconds gray scale video with a frame rate of 14 fps in which the dimension of each frame is 480x320? Each pixel in this video requires to be ...
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0answers
270 views

Error in converting color pdf into grayscale pdf in Linux - 'File has errors…'

I have been trying to convert a color pdf to a grayscale pdf prior to printing to avoid the color printing costs. I am using Debian and ImageMagick commands: convert -monochrome swp574.pdf output2....
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5answers
15k views

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?
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1answer
1k views

Extract Y-channel of every I-frame from MPEG4 movie as loslessly as possible

I'm working on a video tracking experiment and got stuck with videos that are quite badly compressed with the MPEG4 DivX 5x/6x codec. I'm fairly new to image formats, codecs and compression, but I ...
2
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1answer
2k views

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%...
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1answer
584 views

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 ...
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1answer
32k views

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 ...
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4answers
11k views

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" ...
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2answers
25k views

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 ...
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1answer
1k views

how can I print in grayscale/low quality from preview

I have a color printer but would sometimes prefer to print grayscale (for documents where color and quality does not matter) As far as I can see there are no such settings in the preview printing ...
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1answer
2k views

How can I print in grayscale/low quality on my networked Cannon ip4300 via Ubuntu?

I have a Cannon Pixma ip4300 printer connected to a Mac OS X system and shared using CUPS. I can print to this printer from my Ubuntu 10.04 Lucid workstation just fine, however when printing (...
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2answers
1k views

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/...
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1answer
141 views

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 ...