> You know what? The dithered image is not 36.5KB as the article claims, but a 76KB PNG. Incorrect, it is 36.5K: $ wget https://homebrewserver.club/images/i

> You know what? The dithered image is not 36.5KB as the article claims, but a 76KB PNG. Incorrect, it is 36.5K: $ wget https://homebrewserver.club/images/international-switchboard3.png --2019-03-16 12:41:11-- https://homebrewserver.club/images/international-switchboard3.png Resolving homebrewserver.club (homebrewserver.club)... 87.214.157.230 Connecting to homebrewserver.club (homebrewserver.club)|87.214.157.230|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 37359 (36K) [image/png] Saving to: ‘international-switchboard3.png’ international-switc 100%[===================>] 36.48K 26.4KB/s in 1.4s 2019-03-16 12:41:14 (26.4 KB/s) - ‘international-switchboard3.png’ saved [37359/37359] When you tried reproducing the results using GIMP, were you creating similarly constrained indexed-color/paletted images? You likely won't get the same compression levels with rgb pixels, you can use `pnginfo` to compare the file properties: $ pnginfo international-switchboard3.png international-switchboard3.png... Image Width: 800 Image Length: 655 Bitdepth (Bits/Sample): 2 Channels (Samples/Pixel): 1 Pixel depth (Pixel Depth): 2 Colour Type (Photometric Interpretation): PALETTED COLOUR (4 colours, 0 transparent) Image filter: Single row per byte filter Interlacing: No interlacing Compression Scheme: Deflate method 8, 32k window Resolution: -547765670, 22093 (Unknown value for unit stored) FillOrder: msb-to-lsb Byte Order: Network (Big Endian) Number of text strings: 0