Imagecopyresized (destsrcdxdysxsyDWDH SWsh);
Imagecopyresampled (destsrcdxdysxsyDW dhSWSH
<?php
$src = ImageCreateFromJPEG('php.jpg');
$width = ImageSx($src);
$height = ImageSy($src);
$x = $width/2; $y = $height/2;
$dst = ImageCreateTrueColor($x,$y);
ImageCopyResized($dst,$src,0,0,0,0,$x,$y,$width,$height);
//ImageCopyResampled($dst,$src,0,0,0,0,$x,$y,$width,$height);
header('Content-Type: image/jpeg');
ImageJPEG($dst,'',100);
?>
原图：
使用ImageCopyResized()函数生成的结果：
使用ImageCopyResampled()函数生成的结果：
ImageCopyResampled()函数生成的结果比较平滑，效果较好。
By the way, you put an effect in ASCII to represent the image. Imagecolorat () has a very interesting use, it can be cycled check
The color of each pixel in the image, and then manipulate the color data.
Source:
<body bgcolor= "#000000" style= "line-height:6pt" ><?php
$im = Imagecreatefromjpeg (' test1.jpg ' ));
$DX = Imagesx ($im);
$dy = Imagesy ($im);
for ($y = 0; $y < $dy; $y++) {
for ($x =0; $x < $dx; $x++) {
$col = Imagecolorat ($im, $x, $y);
$rgb = Imagecolorsforindex ($im, $col);
printf (' <font color=#%02x%02x%02x>*</font> ',
$rgb [' Red '], $rgb [' Green '], $rgb [' Blue ']]);
}
echo "<br>\n";
}
Imagedestroy ($im);
?>
</body>
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