Example of a PHP method to generate a fuzzy image,

Example of a PHP method to generate a fuzzy image,

This example describes how to generate a fuzzy image using PHP. We will share this with you for your reference. The details are as follows:

<? Phpclass image_blur {/*** image Gaussian Blur (applicable to png/jpg/gif formats) * @ param $ srcImg original image * @ param $ savepath save path * @ param $ savename save name * @ param $ positon blur degree ** added based on the Martijn Frazer code, thanks to Martijn Frazer */public function gaussian_blur ($ srcImg, $ savepath = null, $ savename = null, $ blurFactor = 3) {$ gdImageResource = $ this-> image_create_from_ext ($ srcImg); $ srcImgObj = $ this-> blur ($ gdImageResource, $ blurFactor); $ temp = pathinfo ($ SrcImg); $ name = $ temp ['basename']; $ path = $ temp ['dirname']; $ exte = $ temp ['extension']; $ savename = $ savename? $ Savename: $ name; $ savepath = $ savepath? $ Savepath: $ path; $ savefile = $ savepath. '/'. $ savename; $ srcinfo = @ getimagesize ($ srcImg); switch ($ srcinfo [2]) {case 1: imagegif ($ srcImgObj, $ savefile); break; case 2: imagejpeg ($ srcImgObj, $ savefile); break; case 3: imagepng ($ srcImgObj, $ savefile); break; default: return 'failed to save '; // save Failed} return $ savefile; imagedestroy ($ srcImgObj);}/*** Strong Blur *** @ param $ gdImageResource image resource * @ param $ BlurFactor optional blur degree * optional blur degree 0 use 3 default over 5 extreme blur * @ return GD image resource type * @ author Martijn Frazer, idea based on http://stackoverflow.com/a/20264482 */private function blur ($ gdImageResource, $ blurFactor = 3) {// blurFactor has to be an integer $ blurFactor = round ($ blurFactor ); $ originalWidth = imagesx ($ gdImageResource); $ originalHeight = imagesy ($ gdImageResource); $ smallestWidth = ceil ($ origi NalWidth * pow (0.5, $ blurFactor); $ smallestHeight = ceil ($ originalHeight * pow (0.5, $ blurFactor); // for the first run, the previous image is the original input $ prevImage = $ gdImageResource; $ prevWidth = $ originalWidth; $ prevHeight = $ originalHeight; // scale down and gradually scale back up, blurring all the way for ($ I = 0; $ I <$ blurFactor; $ I + = 1) {// determine dimensions of next image $ NextWidth = $ smallestWidth * pow (2, $ I); $ nextHeight = $ smallestHeight * pow (2, $ I ); // resize previous image to next size $ nextImage = imagecreatetruecolor ($ nextWidth, $ nextHeight); imagecopyresized ($ nextImage, $ prevImage, 0, 0, 0, 0, $ nextWidth, $ nextHeight, $ prevWidth, $ prevHeight); // apply blur filter imagefilter ($ nextImage, IMG_FILTER_GAUSSIAN_BLUR); // now the new image becomes the previo Us image for the next step $ prevImage = $ nextImage; $ prevWidth = $ nextWidth; $ prevHeight = $ nextHeight ;} // scale back to original size and blur one more time imagecopyresized ($ gdImageResource, $ nextImage, 0, 0, 0, 0, $ originalWidth, $ originalHeight, $ nextWidth, $ nextHeight); imagefilter ($ gdImageResource, IMG_FILTER_GAUSSIAN_BLUR); // clean up imagedestroy ($ prevImage); // return result return $ gd ImageResource;} private function image_create_from_ext ($ imgfile) {$ info = getimagesize ($ imgfile); $ im = null; switch ($ info [2]) {case 1: $ im = imagecreatefromgif ($ imgfile); break; case 2: $ im = imagecreatefromjpeg ($ imgfile); break; case 3: $ im = imagecreatefrompng ($ imgfile); break ;} return $ im ;}$ image_blur = new image_blur (); $ image_blur-> gaussian_blur (". /1.jpg", null, null, 3);?>

Original image effect:

Effect of generating a blurred image: