Change image color to sepia,grayscale,b/w

You can change the image color to sepia or b/w or grayscale with the use of GD library and PHP. Here is the sample example.

1.Change Color to Greyscale

//to black and white
if(!file_exists(‘dw-bw.png’)) {
$img = imagecreatefrompng(‘dw-manipulate-me.png’);
imagefilter($img,IMG_FILTER_GRAYSCALE);
imagepng($img,’db-bw.png’);
imagedestroy($img);
}

2. Change Color to B/W

//to negative
if(!file_exists(‘dw-negative.png’)) {
$img = imagecreatefrompng(‘dw-manipulate-me.png’);
imagefilter($img,IMG_FILTER_NEGATE);
imagepng($img,’db-negative.png’);
imagedestroy($img);
}

3. Change Color to Sepia

//to black and white, then sepia
if(!file_exists(‘dw-sepia.png’)) {
$img = imagecreatefrompng(‘dw-manipulate-me.png’);
imagefilter($img,IMG_FILTER_GRAYSCALE);
imagefilter($img,IMG_FILTER_COLORIZE,100,50,0);
imagepng($img,’db-sepia.png’);
imagedestroy($img);
}

Thanks.