Comments on: Different aspects of thumbnailing

By: Imagick blog » Blog Archive » Different aspects of thumbnailing

Imagick blog » Blog Archive » Different aspects of thumbnailing — Fri, 15 Jan 2010 23:48:58 +0000

[...] a few examples of how to thumbnail an image: PLAIN TEXT [...]

By: Thijs Feryn

Thijs Feryn — Sun, 02 Aug 2009 13:12:50 +0000

Hi Mikko

This is just what I was looking for. If finally decided to switch from GD to Imagick and creating square thumbnails wasn’t quite working yet.

I must admit there is little information available on the PHP wrapper for ImageMagick, but your blog seems to be my primary resource.

Keep up the good work!

Thijs

By: Snille

Snille — Thu, 14 Aug 2008 15:03:46 +0000

Ahh… Thank you… Now I just have to get Imagick to work on my Ubuntu server….

By: Mikko Koppanen

Mikko Koppanen — Thu, 14 Aug 2008 08:32:40 +0000

Snille,

Check Imagick->shearImage and Imagick->distortImage

By: Snille

Snille — Thu, 14 Aug 2008 08:22:28 +0000

Hi Mikko!
Thank you for all your examples!! I’ll bookmark this post!
I’m looking for a “Perspective” function…
Is it possible to do with ImageMagick?
Let me explain…
Picture 1 is a normal lets say 80×80 pixels.
When the magick is done it should result in something like this:
Topleft corner: 0
Topright corner: Vertical -6px above topleft corner. Horizontal 74px.
Downleft corner: Vertical 80px from topleft, Horizontal 0px.
Downright corner: Vertical 74px from topleft, Horizontal 68px.
To make it more easy, have a look…
First picture: http://www.snille.net/pix/temp/example1.png
And perspective modified: http://www.snille.net/pix/temp/example2.png

Is this possible?

By: Marhi

Marhi — Sun, 18 May 2008 01:21:59 +0000

Damn! I just noticed that the solution was above my answer.
Sorry about that and great work by the way.

By: Marhi

Marhi — Sun, 18 May 2008 01:18:09 +0000

I just figured that if you have $im->setImageFormat(“GIF”) then the cropThumbnailImage does not work correcly… It gives some padding on the top and on the bottom.
JPG and PNG works fine… Is there a reason for this or just a bug?

By: Mikko Koppanen

Mikko Koppanen — Thu, 08 May 2008 22:01:15 +0000

@Mit Rowe,

seems like my blog is marking your comments as spam for some reason sorry for the inconvenience.

By: Mit Rowe

Mit Rowe — Thu, 08 May 2008 18:43:42 +0000

my code went all screwy.

here’s a second try.

//–

$width=166;
$height=169;

//load in the uploaded file
$uploadfile = new Imagick();
$uploadfile->readImage(“original.jpg”);

//resize & crop
$uploadfile->cropThumbnailImage($width,$height);

//if i were to write out as a GIF at this point, iâ€™d end up with a 166 x 169 graphic on a 166 x 221 (transparent?) canvas.
//this fixes that issue
$uploadfile->setImagePage($width,$height,0,0);

//save thumbnail
$uploadfile->writeImage(‘temp.gif’);

//clear up stuff
$uploadfile->clear();
$uploadfile->destroy();

//–

By: Mit Rowe

Mit Rowe — Thu, 08 May 2008 18:36:25 +0000

With regards to Yudie’s problem, and your solution, i experienced the same issues… the resulting image was the proper size, but it was laid on top of a canvas which was not the size i wanted.

As you suggested, setImagePage fixed it.

readImage(“original.jpg”);

//resize & crop
$uploadfile->cropThumbnailImage($width,$height);

//if i were to write out as a GIF at this point, i’d end up with a 166 x 169 graphic on a 166 x 221 (transparent?) canvas.
//this fixes that issue
$uploadfile->setImagePage($width,$height,0,0);

//save temp resized uploaded file
$uploadfile->writeImage(‘thumbnail.gif’);

//clear up stuff
$uploadfile->clear();
$uploadfile->destroy();
?>