phpimagick完整安装
Imagick::adaptiveThresholdImage() is a function in PHP's Imagick extension that applies adaptive thresholding to an image. Adaptive thresholding is a method used to separate foreground and background pixels in an image based on their intensity values.

Adaptive thresholding is useful when the image has varying lighting conditions or uneven illumination. It adjusts the threshold value for each pixel based on the local variation of pixel intensities. This allows for better separation of foreground and background pixels, resulting in a clearer image.

By using Imagick::adaptiveThresholdImage(), you can pass parameters such as the threshold width, threshold height, offset, and adaptive method to fine-tune the adaptive thresholding process.

Here is an example of how you can use Imagick::adaptiveThresholdImage() to apply adaptive thresholding on an image:

php
$image = new Imagick('input.jpg');

// Apply adaptive thresholding
$image->adaptiveThresholdImage(50, 50, 10);

// Save the resulting image
$image->writeImage('output.jpg');


In this example, the threshold width and height are set to 50. The offset value is set to 10, which adjusts the threshold value for each pixel. You can experiment with different parameter values to achieve the desired output.

Make sure you have the Imagick extension installed and enabled in your PHP environment to use this function.