How do the options work: "3 by 3 average", "11 by 11 average", etc. Magic Wand Tool in Adobe Photoshop?

Question

Adobe Photoshop

How does their principle of operation differ from the Point Sample? I don't understand, can you explain clearly?
I perceive information from animated gifs very well, I think it will be useful for many to know this.

Answer 1

The algorithm of this tool is very simple.
Let's say you have a very heavily compressed JPEG image, where a solid color in some place has become not solid at all due to compression artifacts. And you need to get an average color for this area (for example, to fill some other part of the image). Here you take and turn on one of these modes. It works just like a regular one-pixel eyedropper, only the final color is obtained by adding the R,G,B values ​​per channel (if you are working in RGB space) and dividing the result by the number of pixels. The same may be needed if you want to get an equivalent solid color from a scanned image of what is printed on a printer or a magazine illustration, because there the colors are obtained by overlaying grids of dots of different sizes (rasters) and you will not get the color with a regular single-pixel eyedropper.
In general, you pose the question incorrectly: you are trying to study the abstract functions of the program, and not starting from a specific task.

Answer 2

NxN Average takes the average information from a matrix of NxN pixels, as opposed to extracting the exact information from a single pixel.

Answer 3

It seems to me that not everyone understood the question specifically ... I think the person was trying to understand how to use it.)
Roughly speaking, this affects the area that you process with one tool or another. Especially when you need to clearly highlight a specific shade, or make an effect within a certain shade, an average color value.