coordinatesformulapixel
Calculate pixel from coordinates
Hello I have this image:
This image has 16 pixels. White is 0, pink 1... like in image. My problem is that I need to calculate number of pixel from coordinates. If I have coordinates x = 3 and y = 3, I need to get black pixel with number 15.
How can I do that?
Solution
If you know how many pixels per row you have, you can simply use the next formula :
(y * numberPerRow) + x
Example using a 16 pixels images (4x4)
| x | y | calcul | value |
|---|---|---|---|
| 3 | 3 | 3 * 4 + 3 | 15 |
| 0 | 0 | 0 * 4 + 0 | 0 |
| 1 | 2 | 2 * 4 + 1 | 9 |
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