如何在图像PHP中检测形状的位置 [英] How to detect position of shape in image PHP

问题描述

我的图像带有白色背景，在该图像中，我有某种形状-布的一部分。我需要找到最左，上，右和下像素。最有效的方法是什么？

I have image with white background and in that image i have some kind of shape - part of cloth. I need to find most left, up, right and bottom pixel. What is the most efficient way to do that?

推荐答案

您可以使用trimImage函数修剪图像，然后查看几何和页面信息以查找修剪后剩余的图像边界框。

You can use the trimImage function to trim the image, and then look at the geometry and page info to find how the bounding box of the image that was left after trimming.

$base = new Imagick(realpath('./trim.png'));

$base->trimImage(0);

$geometry = $base->getImageGeometry();
$pageInfo = $base->getImagePage();

printf (
    "Width %d Height %d\n",
    $geometry['width'],
    $geometry['height']
);

printf(
    "OffsetX: %d OffsetY %d\n",
    $pageInfo['x'],
    $pageInfo['y']
);

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