Testimages

Image formats

lossless

• fbd, SIMPLEST, textbased fbdraw ascii pixel plot text commands line by line: p x y r g b, compressed via gzip.
• raw, VERY SIMPLE, binary rgb data, compressed via gzip or xz
• pnm, VERY SIMPLE, netpbm binary, compressed via gzip, see https://en.wikipedia.org/wiki/Netpbm
• qoi, SIMPLE, see https://qoiformat.org/

lossy

• sixel, SIMPLE, see https://github.com/saitoha/libsixel (old ascii escape sequence terminal based format, used dec vt340 terminals, and simple viewable with "cat" in a "xterm -ti vt340")
• png, COMPLEX
• jpg, COMPLEX
• webp, COMPLEX
• avif, REALLY COMPLEX

Public Domain Testimage "Finalmedia RGB Bowls" (800 x 376)

fbdraw, 8bit rgb, compressed gz, 1670425 bytes, lossless

pnm rgb, 8bit, compressed gzip, 746131bytes, lossless

raw rgb, 8bit, compressed gzip, 745994 bytes, lossless

raw rgb, 8bit, compressed xz, 620548 bytes, lossless

qoi rgb, 8bit, compressed xz, 566087 bytes, lossless

png, 8 bit sRGB, 558903 bytes, lossless

png, optimized, 8bit, sRGB, 552137 bytes, lossless

sixel, quantized, 8bit, sRGB, 256 colors, 478061 bytes, lossy TOP

png, quantized and palette optimized, 8bit sRGB, 256 colors, 179234 bytes, lossy TOP

png, dithering floyd-steinberg, 128 colors, 154085 bytes, lossy

png, dithering floyd-steinberg, 64 colors, 126140 bytes, lossy

png, dithering floyd-steinberg, 32 colors, 102560 bytes, lossy

jpg, 90% quality, 8bit sRGB, 97258 bytes, lossy

webp, 75% quality, 8bit sRGB, 46086 bytes, lossy

avif, 30% quality, 8bit sRGB, 23131 bytes, lossy