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Home/ Questions/Q 68181
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Asked: May 10, 20262026-05-10T19:22:34+00:00 2026-05-10T19:22:34+00:00

How does one go about converting an image to black and white in PHP?

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How does one go about converting an image to black and white in PHP?

Not just turning it into greyscale but every pixel made black or white?

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  1. 2026-05-10T19:22:35+00:00Added an answer on May 10, 2026 at 7:22 pm

    Simply round the grayscale color to either black or white.

    float gray = (r + g + b) / 3 if(gray > 0x7F) return 0xFF; return 0x00; 
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