Some of my favourite answers:

• How to split concatenated TIFFs - or any other files
• Difference between P-mode, L-mode and RGB images
• How to gzip every file separately, in parallel
• How to pixellate an image
• Difference between SIMD vs multithreading vs multiprocessing
• How to visualise the differences between 2 images

About Me

Old Unix hack turned landscape photographer with a Mac and Raspberry Pis/Picos these days - which I love after years banging my head against brick walls with MS Windows. Interested in anything related to image processing.

• StackOverflow's top-user and sole Gold badge for Python PIL/Pillow
• StackOverflow's top-user and 2nd Gold badge for imagemagick
• StackOverflow's top-user for image
• StackOverflow's third from top user for image-processing
• StackOverflow's sole Silver badge for JPEG

The Others

My StackOverflow heroes are, in no particular order:

Glenn Jackman - for all-round technical prowess and friendly advice

Ole Tange - for tirelessly correcting my amateurish attempts with GNU Parallel

Ed Morton - for knowing everything about awk and tirelessly correcting my amateurish attempts at awk

fedorqui - for everything bash, awk and sed