Csaba Gabor <[EMAIL PROTECTED]> writes: > When I want to save an image under php as a .jpg, I use: > imagejpeg ($image, $destinationPath, $intQuality) > see http://php.net/imagejpeg > > When I do an image resizing of a .JPG with PEL, I notice that the > file size is quite a bit smaller (e.g. 150K vs. 450) than the .JPG I > get when I use PHP5 without going through PEL (with $intQuality at > 95), so I presume that PEL saves with a lesser image quality. So > far, I haven't managed to track down where the corresponding quality > setting is with PEL. Could someone give me a tip, please.
Ahh, very good question! Actually I haven't thought of this, so you
cannot control the quality setting at the moment...
But don't worry -- it's easy to fix. If you're using PEL as I think
you are (similar to examples/resize.php), then the quality loss occurs
when the PelJpeg constructor is given a PHP image resource. The
resource is converted into a JPEG image and the bytes are extraced
like this:
} elseif (is_resource($data) && get_resource_type($data) == 'gd') {
Pel::debug('Initializing PelJpeg object from image resource.');
/* The ImageJpeg() function insists on printing the bytes
* instead of returning them in a more civil way as a string, so
* we have to buffer the output... */
ob_start();
ImageJpeg($data);
$bytes = ob_get_clean();
$this->load(new PelDataWindow($bytes));
} else {
Simply change line 173 to
ImageJpeg($data, null, 95);
and I think you should be fine. I'll incorporate a quality setting
for the next release.
> Thanks,
> Csaba Gabor from Vienna
>
> PS. I am resizing images from my Olympus Stylus 1000 (including EXIF
> transfer) with PEL. As far as I can tell, the resizing/exif transfer
> is working well.
Cool, I'm glad to hear it!
> PPS. Sorry if this is a duplicate message. I attempted to post this
> yesterday, but there was no joy.
I think you did fine, I have only seen this one message from you.
--
Martin Geisler --- <[EMAIL PROTECTED]> --- http://mgeisler.net
Read, write, create Exif data in PHP with PEL: http://pel.sf.net
Take control of your webserver with PHP Shell: http://phpshell.sf.net
pgpi8EFIaY1UZ.pgp
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