Question

$imagick = new \Imagick(realpath($imagePath));
$imageIterator = $imagick->getPixelIterator();

foreach ($imageIterator as $row => $pixels) { /* Loop through pixel rows */
    foreach ($pixels as $column => $pixel) { 
         if ($column % 2) {

如何将此像素与上方和下方的像素进行比较，将左侧和右侧的像素进行比较，我将使用isSimilar，我已经理解了

getNextIteratorRow / getPreviousIteratorRow也许？它们的像素类似吗？

}
    }
    $imageIterator->syncIterator(); 
}

这就是我如何从当前像素导航到上，下，左，右的像素。

非常感谢。

Answer 1

这是其中一个问题，可能只需编写一些代码就可以解决。

function processPixel($pixeLeft, $pixelMiddle, $pixelRight, $pixelAbove, $rowBelow)
{
    //Whatever it is you're doing.
}

function processRow($rowAbove, $rowMiddle, $rowBelow)
{
    for ($x = 0; $x < count($pixels); $x++) {
        $pixelAbove = null;
        $pixelBelow = null;
        $pixeLeft = null;
        $pixelRight = null;
        $pixelMiddle = $pixels[0];

        if (($x - 1) >= 0) {
            $pixelLeft = $pixels[$x - 1];
        }

        if (($x + 1) < count($pixels)) {
            $pixelRight = $pixels[$x + 1];
        }

        if ($rowAbove != null) {
            $pixelAbove = $rowAbove[$x];
        }
        if ($rowBelow != null) {
            $rowBelow = $rowBelow[$x];
        }

        processPixel($pixeLeft, $pixelMiddle, $pixelRight, $pixelAbove, $rowBelow)
    }
}

function processImageIterator($imageIterator)
{
    $rowAbove = null;
    $rowMiddle = null;
    $rowBelow = null;

    foreach ($imageIterator as $rowPixels) {

        $rowBelow = $rowPixels;

        foreach ($imageIterator as $rowPixels) {
            processRow($rowAbove, $rowMiddle, $rowBelow);
        }

        $rowAbove = $rowMiddle;
        $rowMiddle = $rowBelow;
    }

    // Finish last row with middle on the last row
    processRow($rowAbove, $rowMiddle, null);

    //Finish row of pixel below last row. This may not be necessary
    //depending on your algorithm,
    $rowAbove = $rowMiddle;
    processRow($rowAbove, null, null);
}

请注意，这将是非常高性能的，也就是说很慢。它可能（但不能保证）更快地实现你作为FX运营商所做的任何事情。 Example here和完整documentation here。

php imagick像素迭代器与下一个和上一个像素相比

1 个答案: