Issue
I want to loop through all the pixels of an image, find the rgba value of that pixel, and do something with those pixels.
Example
Say I have an image that's 100x100 pixels. I want to find the value of each one of those pixels with the function I already made:
function getPixel($image, $x, $y) {
$colors = imagecolorsforindex($image, imagecolorat($image, $x, $y));
$inrgba = 'rgba(' . $colors['red'] . ',' . $colors['green'] . ',' . $colors['blue'] . ',' . $colors['alpha'] . ')';
return $inrgba;
}
And store those values, along with the dimensions of the image, in an array, or an array of arrays. I want to use the end result in a html page.
How do I do this?
Solution
for($x=1;$x<=$width;$x++)
{
for($y=1;$y<=$height;$y++)
{
$pixel=getPixel($image, $x, $y);
//do something
}
}
What this will do is find each pixel in each column.
i=iteration
pixel coordinate = (x,y)
For a 5 x 5 image the iteration would look like this:
i1 = (1,1)
i2 = (1,2)
i3 = (1,3)
i4 = (1,4)
i5 = (1,5)
i6 = (2,1)
i7 = (2,2)
i8 = (2,3)
i9 = (2,4)
i10 = (2,5)
i11 = (3,1)
i12 = (3,2)
i13 = (3,3)
i14 = (3,4)
i15 = (3,5)
i16 = (4,1)
i17 = (4,2)
i18 = (4,3)
i19 = (4,4)
i20 = (4,5)
i21 = (5,1)
i22 = (5,2)
i23 = (5,3)
i24 = (5,4)
i25 = (5,5)
Answered By - bluegman991 Answer Checked By - Dawn Plyler (PHPFixing Volunteer)
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