PHP合并图像(白色=透明度) [英] PHP Merge images (white color = transparency)
问题描述
如果图像颜色为白色,而透明状态为白色,如何合并图像?
我有这种情况:
我需要以下结果:
这不是最好的结果,因为我不知道实现此目的的更好方法.这是我的结果:
这是PHP:
<?php
/** Set source image location **/
$baseImageSource = 'http://q/stock-photos/tux.png';
$overlayImageSource = 'http://q/stock-photos/firefox-logo-small.jpg';
/** Overlay image configuration **/
// Set this value between 0 and 100. 10 will doing great
$fuzz = 10;
// Set position of overlay image, from top and left;
$overlayTop = 240;
$overlayLeft = 200;
/** Core program **/
// Create Imagick object for source image
$overlayImage = new Imagick( $overlayImageSource );
$finalImage = new Imagick( $baseImageSource );
// Remove overlay image background
$overlayImage->paintTransparentImage(
$overlayImage->getImagePixelColor( 0, 0 ),
0, round( $fuzz * 655.35 )
);
// Set image overlay format
$overlayImage->setImageFormat('png');
// Put overlay image to base image
$finalImage->compositeImage(
$overlayImage, Imagick::COMPOSITE_DEFAULT,
$overlayLeft,
$overlayTop
);
// Set output image format
$finalImage->setImageFormat('png');
// Prepare image and publish!
header('Content-type: image/png');
echo $finalImage;
基本上,这只是 (以实现图像合并)和此答案(以实现背景移除).用于删除背景的方法是 Imagick::paintTransparentImage()
,其中 Imagick::getImagePixelColor()
用于检测背景颜色.然后,我们只需要将两个图像与 Imagick::compositeImage()
合并. /p>
但是,这个结果仍然远非完美,尤其是将其与GIMP或Photoshop等图像处理应用程序进行比较时.但是您应该尝试一下.希望对您有所帮助:)
How to merge images if in image color white get transparency status white color?
I have this situation:
I need this result:
This is not a best result, since I didn't know better method to achieve this. Here is my result:
Here is the PHP:
<?php
/** Set source image location **/
$baseImageSource = 'http://q/stock-photos/tux.png';
$overlayImageSource = 'http://q/stock-photos/firefox-logo-small.jpg';
/** Overlay image configuration **/
// Set this value between 0 and 100. 10 will doing great
$fuzz = 10;
// Set position of overlay image, from top and left;
$overlayTop = 240;
$overlayLeft = 200;
/** Core program **/
// Create Imagick object for source image
$overlayImage = new Imagick( $overlayImageSource );
$finalImage = new Imagick( $baseImageSource );
// Remove overlay image background
$overlayImage->paintTransparentImage(
$overlayImage->getImagePixelColor( 0, 0 ),
0, round( $fuzz * 655.35 )
);
// Set image overlay format
$overlayImage->setImageFormat('png');
// Put overlay image to base image
$finalImage->compositeImage(
$overlayImage, Imagick::COMPOSITE_DEFAULT,
$overlayLeft,
$overlayTop
);
// Set output image format
$finalImage->setImageFormat('png');
// Prepare image and publish!
header('Content-type: image/png');
echo $finalImage;
Basically this is just a modification of this answer (to achieve image merger) and this answer (to achieve background removal). The method used to remove background is Imagick::paintTransparentImage()
, with Imagick::getImagePixelColor()
is used to detect background color. Then we just need to merge both image with Imagick::compositeImage()
.
But still, this result is far from perfect, especially if you compare it with image processing app like GIMP or Photoshop. But you should give it a try. Hope it helps :)
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