rgb2gray()
Image Processing
rgb2gray() is a MATLAB®-compatible image processing function for convert an rgb or rgba image to grayscale using luminance weighting. Run it online in your browser with SimLab — free, no install, no license required.
Convert an RGB or RGBA image to grayscale using luminance weighting.
Syntax
gray = rgb2gray(img)
Examples — run rgb2gray() in your browser
gray = rgb2gray(imread("/cat.jpg"))▶ RunSee Also
Frequently Asked Questions about rgb2gray()
Is the rgb2gray() function free to use in SimLab?
The browser workspace requires no MATLAB® license or installation. Connected features require network access and may have account, tier, availability, or usage limits. You can open rgb2gray() and 510+ other MATLAB®-compatible function references at simulations4all.com/simlab.
Do I need to install MATLAB to use rgb2gray()?
No. SimLab’s core parser, workspace state, and most functions run locally in your browser. The rgb2gray() function requires no MATLAB® license or desktop software download.
What does rgb2gray() do?
Convert an RGB or RGBA image to grayscale using luminance weighting. It is a MATLAB®-compatible image processing function available in SimLab with the same calling syntax as MATLAB® — typically: gray = rgb2gray(img).
Can I run rgb2gray() in my browser?
Yes. Open SimLab at simulations4all.com/simlab, write or paste code that calls rgb2gray(), and run it. This function’s calculation runs locally in the browser. SimLab session analytics, sharing, feedback, and eligible acceleration have separate network boundaries.
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