Transparent to white in Imagick for PHP

Question

I have a png image with a transparent background and I want to convert it to a jpg image with a white background.

The code is basically this:

$image          


        

Answer 1

You can try it by changing Imagick constant as shown below

//$image will conatains image which needs background to be transparent
$white = new Imagick();

$white->newImage($image->getImageWidth(), $image->getImageHeight(), new ImagickPixel( "white" ));
$white->compositeimage($image, Imagick::COMPOSITE_DEFAULT, $x1OfTransparentImage, $y1OfTransparentImage,);
$white->flattenImages();
$white->writeImage('opaque.jpg');    

$white->destroy();

Answer 2

Try the following, it works for me:

$im = new Imagick('trans.png');
$im->setimagebackgroundcolor('white');
$im = $im->flattenimages();

$im->writeimage('transToWhite.jpg');

Hope that helps!

Answer 3

I ran into the same problem when converting PDFs to PNGs, and I used flattenImages().

        //get the first page of the PDF
        $im = new imagick( $file.'[0]' );

        //set the background to white
        $im->setImageBackgroundColor('white');

        //flatten the image
        $im = $im->flattenImages(); 

        //do the rest of the image operations
        $im->setResolution( 181, 181 );
        $im->setCompressionQuality(100);
        $im->resizeImage ( 181, 181,  imagick::FILTER_LANCZOS, 1, TRUE);
        $im->setImageFormat('png');
        $imageName = $title.'_thumb.png';

Answer 4

Try:

$image = new Imagick('transparent.png');
$image->setImageMatte(true);
$image->setImageMatteColor('white');
$image->setImageAlphaChannel(Imagick::ALPHACHANNEL_OPAQUE);
$image->writeImage('opaque.jpg');