script for cropping images

Question

Hi! I have many (about 1000) images (printscreens), and I need to crop these images (all cropped images are in the same region in the full image).

How can I do this in php? Or maybe GIMP is supporting some macro scripts to do this?

Thanks in advance.

Answer 1

You can do it in PHP using the GD image functions.

Your script might look something like this (not tested):

$it = new RecursiveDirectoryIterator('./screenshots');
foreach ($it as $file)
{
    if (!preg_match('/\.jpe?g$/i', $file->getFilename()))
     continue;

    $src = imagecreatefromjpeg($file->getRealPath());
    $dest = imagecreatetruecolor(1000, 1000);

    imagecopyresampled($desc, $src, 0, 0, X_OFFSET, Y_OFFSET, 1000, 1000, WIDTH, HEIGHT);
    imagejpeg($dest, './resized/' . $file->getFilename());
}

Answer 2

To do this with PHP you'll need a GD image manipulation library. Then you can use imagecopy() function to crop you image and many others GD functions to manipulate the image in whatever way you need.

Answer 3

Except using GD, as Greg and n1313 proposed, you can also use ImageMagick for that, e.g. similar to Greg's solution, but with

$original_image = new Imagick($file->getRealPath());
$dest_image = $original_image->clone();
$dest_image->cropImage($width, $height, $x, $y);
$dest_image->writeImage('./resized/' . $file->getFilename());

You might check for exceptions when creating the new image (i.e. image cannot be opened) or returned false on cropImage and writeImage (image cannot be cropped or cannot be written).