How to get the color of all the pixels in an image without iterating through the pixels in two loops?

Question

PHP

It is possible to get the color of the pixels by their coordinates by looping through everything horizontally and vertically, using
imagecolorat($thumb, $x, $y)

Is it possible to get the colors of all pixels without iterating in two loops?

Answer 1

If the picture is in an uncompressed format, for example, BMP, you can probably read an array of pixels directly from disk, having figured out the file format.
For compressed formats, you will need to decompress the image first. For example, for PNG and the GD library, the GD function imagecreatefrompng()
does not document direct access to the memory area where the pixel data of the resulting imageresource is stored. Therefore, with it, the only option is to iterate in a loop.
See what ImageMagick can do . For example getImageColors()

Answer 2

There is no equivalent function in PHP to take all the pixels from an image area as a 32-bit integer.
First of all, it's gluttonous from memory. secondly, it is customary to do heavy calculations in the background.
Well, thirdly, for background tasks, it is easier to build processing with bash scripts.