PHP implementation of anti-color image processing steps

This time to everyone to bring PHP implementation of the image of the anti-color processing steps, PHP implementation of the image of the anti-color processing of the attention of the matter, the following is the actual case, a look.

Today, there is a need to use PHP to color the picture, and turn gray, before I did not know is not feasible, and then saw the imagefilter() function, used to turn gray more than enough, good strong;

ImageFilter ($im, Img_filter_grayscale)

Of course, there are people in CSS to set the gray

<style type= "Text/css" >img {-webkit-filter:grayscale (1);/* WebKit */filter:gray;/* ie6-9 */filter:grayscale (1) ; * * */}</style>

PHP color code:

<?php/*** is mainly used for image processing function *///image inverse color function color ($url) {//Get picture Information list ($width, $height, $type, $attr) = GetImageSize (  　　$url);  　　$imagetype = Strtolower (Image_type_to_extension ($type, false)); $fun = ' Imagecreatefrom '. ($imagetype = = ' jpg '? ')  　　JPEG ': $imagetype);  　　$img = $fun ($url); for ($y =0; $y < $height; $y + +) {for ($x =0; $x < $width; $x + +) {//Get the value of the color $index = Imagecolorat (    　　　　$img, $x, $y);    　　　　Gets an array of colors $color = Imagecolorsforindex ($img, $index);    　　　　The inverse of the color value $red = 256-$color [' Red '];    　　　　$green = 256-$color [' Green '];    　　　　$blue = 256-$color [' Blue '];    　　　　$hex = Imagecolorallocate ($img, $red, $green, $blue);  　　　　Assigns a color value to each pixel Imagesetpixel ($img, $x, $y, $hex);    　　}}//Output picture switch ($imagetype) {case ' gif ': imagegif ($img);  　　　　Break    　　Case ' JPEG ': imagejpeg ($img);  　　　　Break    　　Case ' png ': imagepng ($img);  　　　　Break  　　Default:break; }}

Test code:

$imgurl = ' 1.jpg '; echo color ($imgurl);

The original picture (in the small series commonly used in the destruction of childhood spoof diagram for example):

After the operation (here to test-oriented, as for the image of the three-view subversion or facial features, small series will not ask the ~):

Believe that you have read the case of this article you have mastered the method, more exciting please pay attention to the PHP Chinese network other related articles!

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