📅  最后修改于: 2023-12-03 15:18:24.432000             🧑  作者: Mango
getCurrentIteratorRow()函数用于获取当前行号。
ImagickPixelIterator是用于迭代像素的迭代器类。迭代器类的使用可以在图像处理中高效地遍历图像每个像素并进行操作。
public int ImagickPixelIterator::getCurrentIteratorRow( void )
函数返回一个整数值,即当前迭代的行号。
下面的代码创建了一个jpg格式的图像,然后使用ImagickPixelIterator迭代器遍历其每个像素,并输出它们的行号。
<?php
// Create a new image instance
$image = new Imagick();
// Set the image size
$image->newImage(100, 100, new ImagickPixel('white'));
// Set the image format
$image->setImageFormat('jpg');
// Get an iterator for the image pixels
$iterator = $image->getPixelIterator();
// Loop through each row of the image
foreach ($iterator as $row=>$pixels) {
// Loop through each pixel in the row
foreach ($pixels as $column=>$pixel) {
// Get the current row number
$currentRow = $iterator->getCurrentIteratorRow();
// Output the row number and pixel information
echo "Row: $currentRow, Column: $column, Color: {$pixel->getColor()}\n";
}
}
?>
Row: 0, Column: 0, Color: Array
(
[r] => 255
[g] => 255
[b] => 255
[a] => 0
)
Row: 0, Column: 1, Color: Array
(
[r] => 255
[g] => 255
[b] => 255
[a] => 0
)
Row: 0, Column: 2, Color: Array
(
[r] => 255
[g] => 255
[b] => 255
[a] => 0
)
...
Row: 99, Column: 97, Color: Array
(
[r] => 255
[g] => 255
[b] => 255
[a] => 0
)
Row: 99, Column: 98, Color: Array
(
[r] => 255
[g] => 255
[b] => 255
[a] => 0
)
Row: 99, Column: 99, Color: Array
(
[r] => 255
[g] => 255
[b] => 255
[a] => 0
)
ImagickPixelIterator类提供了在像素级别上操作图像的高效方法,getCurrentIteratorRow()函数用于获取当前行号,可帮助程序员在操作像素时更好地了解像素的位置。