How to plot an image with other PHP colors?

Question

PHP

I have an array with rgb colors (I can overwrite it in hex, in general the format is not important).
I need to loop through an image pixel by pixel and replace with the most similar color in an array.
The problem is finding a similar color.
Urgently! If anyone has any thoughts, I would be very grateful.

Answer 1

algolist.manual.ru/graphics/find_col.php

Answer 2

what is so difficult? each color in hex. then by enumeration you subtract the color of the array from the original one. where modulo is the smallest result, then it fits

Answer 3

the first thing that comes to mind in your replacement is
hex numbers to dec translate ( us2.php.net/manual/en/function.hexdec.php ), sort the array by color value. And search to find the number closest to the given number.