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?
Yes. SimLab is 100% free — no signup, no license, and no usage limits. You can run rgb2gray() and 510+ other MATLAB®-compatible functions directly in your browser at simulations4all.com/simlab.
Do I need to install MATLAB to use rgb2gray()?
No. SimLab runs entirely in your web browser with zero installation. The rgb2gray() function works without any MATLAB® license or 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. Execution happens locally in your browser — no data leaves your machine.
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