Questions tagged [grayscale]

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How to achieve exact grayscale color values when saving to png from Photoshop?

I am trying to create a grayscale file and save it as .png with the exact grayscale values that I enter in Photoshop. I create a new file with 8bit grayscale color mode without color management. The ...
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20 views

Converting Black and White Images to Grayscale

I'm doing a little image project with imagemagick, but I'm fairly new to everything and pretty mediocre at programming. What I'm trying to do is convert all images that are close to black and white (...
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1answer
405 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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121 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
312 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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1answer
880 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
305 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
74 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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180 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
845 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
946 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
171 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
262 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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4answers
11k 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
908 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 ...
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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
560 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
24k 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
10k 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
22k 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
140 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 ...