Image Optimization

  1. Delta Encoding – The compressor stores the difference in neighboring pixels, especially useful for large areas that are similar like a picture of the sky or water. Can be extended to group blocks of nearby pixels.

2. Images often have metadata attached like geolocation and as a display resource that is a waste of space and slows load times.

3.  CSS pixels can contain 1 to many physical pixels. They are not the same but the more physical pixels the better it looks.



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