Using crop & +repage (split image and save as separate)

[jeffreyg]

Hello,

I'm trying to make 4 images from 1 image:


I used ImageMagick and it works fine. But when I try to type it in Imagick it doesn't work anymore. I get 1 image thats 50x50 pixels, instead of 4 images.

This is my ImageMagick code for testing:

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exec("convert input.jpg -crop 50%x50% +repage output_%d.jpg");

This is my Imagick code:

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$img = new Imagick('input.jpg');
$img->cropImage(50% , 50% , 0, 0);
$img->setImagePage(50, 50, 0, 0);
$img->writeImage('output_%d.jpg');
$img->destroy();

I got 2 known issues with this code which I can't solve:

1. It doesn't allow me to use the %. No matter what I try, with ' and " putting around it and without. It just doesn't work. The workaround that I (can) use is calculating the size of the input image and manually take 50% of both the height and width. But I don't want a ''human hand'' to be involved in this.
2. The +repage that I use in ImageMagick doesn't seem to be working when I use setImagePage with Imagick. I also tried resetImagePage(); but that didn't work either.

After I got the 4 images I want to save them separate.

I already tried a bunch of options and looked around on this forum and some Imagick tutorial sites but I couldn't find a solution that fits my problem..

I'm using ImageMagick 6.8.1-8 and a compatible Imagick version. Besides that, I use the code in PHP version 5.4.7.

[Bonzo]

I would guess a percentage crop is not supported - Imagick only supports some of Imagemagicks options.

The workaround that I (can) use is calculating the size of the input image and manually take 25% of both the height and width. But I don't want a ''human hand'' to be involved in this.

Where does the 25% come into your example?

Untested code as I do not use or have access to Imagick; I wonder if it will save all the crops or just the one?

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$size = getimagesize('input.jpg ');

$crop_width = round($size[0]/2);
$crop_height = round($size[1]/2);

$img = new Imagick('input.jpg');
$img->cropImage($crop_width , $crop_height , 0, 0);
$img->setImagePage(50, 50, 0, 0);
$img->writeImage('output_%d.jpg');
$img->destroy();

[jeffreyg]

Thanks for the reply.

I tried your code but it only gives me 1 new image. So your right about that it saves 1 crop and not all 4. I got the top left crop.

And about the 25% I meant 50%, I edited it, thanks.