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grayscalecolor-spaceimage-conversionwebp

Does webp support grayscale colorspace?

I see official cwebp document have no option to specify target colorspace https://developers.google.com/speed/webp/docs/cwebp

because I wish using grayscale color space could save some space for text image.

Solution

  • According to the Specification for WebP Lossless Bitstream and the VP8 Data Format and Decoding Guide, WebP only deals with (A)RGB.

    Checkout the libwebp decode and encode APIs.