setasign / setapdf-imageextractor

PoC to extract images from PDFs with SetaPDF-Core

SetaPDF-ImageExtractor

This package is a proof of concept to extract images from PDFs in pure PHP with the SetaPDF-Core component and an image render module. Currently, not all kinds of images are supported. This is also very dependent on your used image renderer library. GD and Imagick are currently implemented. We recommend you to use Imagick as it's more feature complete as GD but may be a little harder to install.

Requirements

This package is developed and tested on PHP >= 7.4.

You'll need an active license of the SetaPDF-Core component.

Requirements of the SetaPDF-Core component can be found here.

Usage

This example here extracts all images from the first page of the pdf:

$document = SetaPDF_Core_Document::loadByFilename('your-pdf-file.pdf');
$images = \setasign\SetaPDF\ImageExtractor\ImageExtractor::getImagesByPageNo($document, 1);
foreach ($images as $imageData) {
    // if you're using imagick
    $imagick = \setasign\SetaPDF\ImageExtractor\ImageExtractor::toImage($imageData, ImageExtractor::IMAGE_RENDERER_IMAGICK);
    $imagick->setImageFormat('png');
    $image = $imagick->getImageBlob();
    $imagick->destroy();
    echo '<img src="data:image/png;base64,' . base64_encode($image) . '"/>';

    // if you're using gd use this code instead
    $gd = ImageExtractor::toImage($imageData, ImageExtractor::IMAGE_RENDERER_GD);
    ob_start();
    imagepng($gd);
    $image = ob_get_clean();
    imagedestroy($gd);
    echo '<img src="data:image/png;base64,' . base64_encode($image) . '"/>';
}

License

This package is open-sourced software licensed under the MIT license.

setapdf-imageextractor's Issues

Rotate images in relation to the page rotation

Does this make sense?

Create an PoC that shows how to replace extracted images with e.g. compressed/modified versions

This should be possible for images that can be extracted.