note 71444 added to function.imagecolorat

//test if a Jpeg is greyscale or color function iscolor($pic_adress){ // A Pixel is Greyscale if the r = B = G //example: colorpixel R=250, G=140 , B=19 Greyscale Pixel R=110, G= 110, B=110 //we do a check of 10 Pixels to find out if the Picture is Greyscale $tocheck = 10; $iscolor=false; $temp= getimagesize($pic_adress); $x= $temp[0]; $y= $temp[1]; $im= imagecreatefromjpeg($pic_adress); //now check out the Pixels for( $i = 0 ; $i< $tocheck && !$iscolor; $i++){ // Here a Random Pixel is chosen $color = imagecolorat($im,rand(0,$x),rand(0,$y)); //Problem color is an int //The Hex view on the number is RRGGBB // Here we get the blue part of the Pixel $blue = 0x0000ff & $color; $green = 0x00ff00 & $color; //The Green part we have to push 8 bits to the right to get an Compareable result $green = $green >> 8; $red =0xff0000 & $color; //red part needs to be pushed 16 bit $red = $red >> 16; // if one of the Pixels isnt Greyscale it breaks an you know this is a color picture if( $red!= $green || $green!= $blue){ $iscolor = true; break; } } return $iscolor; } ---- Server IP: 217.13.201.10 Probable Submitter: 134.95.113.8 ---- Manual Page -- http://www.php.net/manual/en/function.imagecolorat.php Edit -- https://master.php.net/note/edit/71444 Del: integrated -- https://master.php.net/note/delete/71444/integrated Del: useless -- https://master.php.net/note/delete/71444/useless Del: bad code -- https://master.php.net/note/delete/71444/bad+code Del: spam -- https://master.php.net/note/delete/71444/spam Del: non-english -- https://master.php.net/note/delete/71444/non-english Del: in docs -- https://master.php.net/note/delete/71444/in+docs Del: other reasons-- https://master.php.net/note/delete/71444 Reject -- https://master.php.net/note/reject/71444 Search -- https://master.php.net/manage/user-notes.php