resizeing images

[Flurp]

Having a problem...
or not a problem.. but when i resize images with imagecopyresized() it returns me an image with an afoul quality.. not worth it!
i want good quality! why is it like this?

code:

function make_thumb($imagefile, $new_w=100, $new_h=75) 
{ 
	// get source image info.
	$img_data=getimagesize($imagefile); 
	$src_w=$img_data[0]; 
	$src_h=$img_data[1]; 
	$src_type=$img_data[2];

// get source image
switch ($src_type)
{
	case 1:
		$src_img=ImageCreateFromGIF($imagefile) or die ("Cannot open source");
		break;
	case 2:
		$src_img=ImageCreateFromJPEG($imagefile) or die ("Cannot open source");
		break;
	case 3:
		$src_img=ImageCreateFromPNG($imagefile) or die ("Cannot open source");
		break;
}


// if the image already exists blow it away.
if ( file_exists("thumb_".$imagefile) ) 
{ 
	unlink("thumb_".$imagefile); 
} 

// I use thumb_ to show that it is a thumbnail. 
// save the new image as a png.
switch ($src_type)
{
	case 1:
		imagegif($dst_img,"thumb_".$imagefile);
		break;
	case 2:
		imagejpeg($dst_img,"thumb_".$imagefile);
		break;
	case 3:
		imagepng($dst_img,"thumb_".$imagefile);
		break;
}

// free up the memory.
ImageDestroy($src_img); 
ImageDestroy($dst_img); 

} 

[thoand]

Se http://www.php.net/manual/en/function.imagejpeg.php

eg.

imagejpeg($dst_img,"thumb_".$imagefile, 100);

see the third parameter (add 0-100) where 100 is best quality.

regards Thomas

[immot]

Imagecopyresized just makes bad quality. If you're using gd2 you can use imagecopyresampled which makes much better quality.

• immot

[Flurp]

i tried imagecopyresampled()
but it gave me the same quality...

(i am using gd2)

[immot]

Aren't you too demanding 😉

[Flurp]

jupp!

100% quality all the way!
nothin more, nothin less! :p

[apepelis]

1) you aren't changing the height at all in your function..
2) you need to copy it into a truecolor image
3) GIF not supported after gd 1.6
4) read this post:
http://www.phpbuilder.com/board/showthread.php?s=&threadid=10222182

5) and if you could reply to help me here:
http://www.phpbuilder.com/board/showthread.php?s=&threadid=10225405
thanks

[Flurp]

well.. im not using that exact function... i just narrowed it down some... some other "unnecisary" code may have dissapeered. but thats about it..

how do i do the truecolor thing?

[apepelis]

look at the example in the link above.
that does a true color image.