我拿了
here中的Mehdi Karamosly在他的回答中提到的并修改了一些有点simipiler并做了一个简单的html输出,你可以修改你的输出喜欢.如果要添加安全性,可能需要添加更多数据检查以确保其文件/实际图像.我已经在我的计算机上检查了它并且它可以工作,并且希望它可以通过一些修改来满足您的需求.
function graycolor($img){
list($width,$height) = getimagesize($img);
$mime = pathinfo($img,PATHINFO_EXTENSION);
switch($mime){#use appropriate function depending on image type
case 'jpg':
case 'jpeg':
$im = imagecreatefromjpeg($img);
break;
case 'png':
$im = imagecreatefrompng($img);
break;
case 'gif':
$im = imagecreatefromgif($img);
break;
default:
#invalid type
exit;
}
if(!is_color($img,$im)){#$img = string; $im = resource string
$ret = "";
for($i = 0; $i < $height; $i++){#loop height pixels
for($ii = 0; $ii < $width; $ii++){#loop width pixels
$color = imagecolorat($im,$ii,$i);
$color = imagecolorsforindex($im,$color);
$ret .= $color['red'] . " ";
}
$ret .= "\n";
}
return $ret;
}else{
#$ret = "";
#for($i = 0; $i < $height; $i++){#loop height pixels
#for($ii = 0; $ii < $width; $ii++){#loop width pixels
#$color = imagecolorat($im,$i);
#$color = imagecolorsforindex($im,$color);
#$ret .= $color['red'] . "," . $color['green'] . "," . $color['blue'] . " ";
#}
#$ret .= "\n";
#}
return "color image";
}
}
function is_color($img,$im){
$times = 10;#number of times to check image for color
$iscolor = false;
list($width,$height) = getimagesize($img);
for($i = 0 ; $i < $times && !$iscolor; $i++){
$color = imagecolorat($im,rand(0,$width),$height));#get random cords
$color = imagecolorsforindex($im,$color);#get the random color's values
if($color['red'] !== $color['green'] || $color['green'] !== $color['blue']){
$iscolor = true;
break;
}
}
return $iscolor;
}
echo graycolor('color.jpg');#outputs color image
echo graycolor('gray.jpg');#outputs numbers
