Convert an 8-bit grayscale image into an RGB image

[zou]

You can't.  When you convert color to gray, you lost the color info. forever.  Color plane is not enough.

You can convert the grayscale image to color image format.  But the image still looks gray to human eye.

[alexderjuengere]

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@zou wrote:

You can't.  When you convert color to gray, you lost the color info. forever.  Color plane is not enough.

You can convert the grayscale image to color image format.  But the image still looks gray to human eye.

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how about to transform the color images RGB to Y Cb Cr , process Y , and then re-transform the processed Y together with the un-processed Cb Cr

could that work?

https://en.wikipedia.org/wiki/YCbCr

Spoiler

- How to use the following Snippet: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000x2PkCAI&l=de-DE
- RGB to YCbCr from https://forums.ni.com/t5/Example-Code/AVAST-Unleash-Your-Inner-Pirate-using-LabVIEW/ta-p/3515772

[zou]

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@alexderjuengere wrote:

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how about to transform the color images RGB to Y Cb Cr , process Y , and then re-transform the processed Y together with the un-processed Cb Cr

could that work?

https://en.wikipedia.org/wiki/YCbCr

Spoiler

- How to use the following Snippet: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000x2PkCAI&l=de-DE
- RGB to YCbCr from https://forums.ni.com/t5/Example-Code/AVAST-Unleash-Your-Inner-Pirate-using-LabVIEW/ta-p/3515772

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That might be a good idea.

[paul_a_cardinale]

Perhaps just separate the original image into separate R, G, B components, then perform the de-hazing separately on each of them.  Then put them back together.