Moving basis decomposition for images

This is the first installment in the “Demystifying the PVS” series.

This is the second installment in the “Demystifying the PVS” series.

This is the third installment in the “Demystifying the PVS” series.

A little horizontal blur doesn’t hurt.

MS-DOS games that ran at 320x200 screen resolution didn’t have square pixels. This means the image was vertically stretched by the cathode-ray tube to fit the 4:3 aspect ratio of the actual display screen. As a consequence, screenshots taken of such games must be scaled vertically to look right on modern displays with square pixels.