Very Poor Thumbnail quality

[BevS97]

I have my gallery set up to auto generate the thumbnails using GD Bibliothek,  and I have Compression off, and quality = 100.

the first few images had nice looking thumbnails,  but the latest one's are very poor quality.  I haven't changed anything regarding the thumbnails in the setup.

here's a good one


and a recent one

[V@no]

GD is not very good for resizing images anyway. maybe u should think about installing ImageMagic, if u can.

[BevS97]

is it free? and where would I find it?

[BevS97]

to answer my own question,  it is free and it's here
http://www.imagemagick.org/

but it's not clear what I need to download, and where I would install it.

Bev

[V@no]

well, try this:
ftp://ftp.fifi.org/pub/ImageMagick/binaries/
then if u use windows, then u'll need put exact path/with file convert.exe were u install IM in 4images settings:
ex. D:/ImageMagick/convert.exe
if linux, then /home/ImageMagic/covert  (not sure about linux, never used)

[BevS97]

so,  are you saying I just install it on my pc???  Surely I need to put it up on my website someplace?  How would my other members use it, if it is only installed on my pc.

Bev

[V@no]

well, non of your users uses PHP when they open your website, your server does everything and output for them the result.
same with ImageMagic. u just tell 4images script where its installed.
then when time comes to change size of your photos, or make thumbnails, the script will run ImageMagick. that's all.

[bxmas13]

Just found a way to keep the thumbnail quality high using GD_Bibliothek/GD_Library.

If you edit the /includes/image_utils.php with the following:

Scroll down to the lines

if (defined('CONVERT_IS_GD2') && CONVERT_IS_GD2 == 1) {
    $thumb = imagecreatetruecolor($width, $height);
  }
  else {
    $thumb = imagecreate($width, $height);
}
  $image_create_handle = "imagecreatefrom".$types[$image_info[2]];

Change it to this:   

if (defined('CONVERT_IS_GD2') && CONVERT_IS_GD2 == 1) {
    $thumb = imagecreatetruecolor($width, $height);
  }
  else {
    $thumb = imagecreatetruecolor($width, $height);
}
  $image_create_handle = "imagecreatefrom".$types[$image_info[2]];

Every thumbnail I create with this change has turned out perfect.  I hope this helps.

B.C.  

[legolasbloom]

thanks so much! it worked for me!

[heiko]

thanks so much! it worked for me!

Fatal error: imagecreatetruecolor(): requires GD 2.0 or later in


I got this....crumbel crumbel...provider...provider...

Heiko

[V@no]

bxmas13, it seems that php server doesnt correctly define what version GD is installed.
heiko, do u have same problem with GD 1?

[jengwen]

The change above fixed my colors, but the thumbnail still looked pretty bad.  There is another if statement shortly after the truecolor one for imageresize or imageresample.  I changed that one too and now my thumbnails look great!

[undrline]

That's some bad code you're asking it to do . . . you're telling an if-statement to do the same thing regardless of whether the criteria are true.

If it works, I guess, there's no harm, but I wouldn't encourage others to try it.

[V@no]

This is such old topic...since then a solution of this issue was added in the FAQ...