PYTHON imagecolorat

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Python replacement for PHP's imagecolorat [ edit | history ] 
<?php
$im = imagecreatefrompng("php.png");
$pixel = imagecolorat($im, $x, $y);
$colors = imagecolorsforindex($im, $rgb);

$red = colors['red']
$green = colors['green']
$blue = colors['blue']
$alpha = colors['alpha']
?>

Don't Forget To Download PIL Lib: 
from PIL import Image
#IF Not Working try: import Image

im = Image.open('captcha.png')
# If Not Getting Alpha Try: im = im.convert("RGBA")
pixel = img.load()
colors = pixel[x,y]

red = colors[0]
green = colors[1]
blue = colors[2]
alpha = colors[3]

PHP imagecolorat

PHP original manual for imagecolorat [ show | php.net ]

imagecolorat

(PHP 4, PHP 5)

imagecolorat — Get the index of the color of a pixel

Description

int imagecolorat ( resource $image , int $x , int $y )

Returns the index of the color of the pixel at the specified location in the image specified by image .

If PHP is compiled against GD library 2.0 or higher and the image is a truecolor image, this function returns the RGB value of that pixel as integer. Use bitshifting and masking to access the distinct red, green and blue component values:

Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

x

x-coordinate of the point.

y

y-coordinate of the point.

Return Values

Returns the index of the color.

Examples

Example #1 Access distinct RGB values

<?php
$im = imagecreatefrompng("php.png");
$rgb = imagecolorat($im, 10, 15);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;

var_dump($r, $g, $b);
?>

The above example will output something similar to:

int(119)
int(123)
int(180)

Example #2 Human-readable RGB values using imagecolorsforindex()

<?php
$im = imagecreatefrompng("php.png");
$rgb = imagecolorat($im, 10, 15);

list($r, $g, $b, $alpha) = imagecolorsforindex($rgb);

var_dump($r, $g, $b, $alpha);
?>

The above example will output something similar to:

int(119)
int(123)
int(180)
int(127)

See Also

GD Functions
PHP Manual