Imagick::exportImagePixels

(PECL imagick 2 >=2.3.0, PECL imagick 3)

Imagick::exportImagePixels — Exports raw image pixels

说明

public Imagick::exportImagePixels(
    int $x,
    int $y,
    int $width,
    int $height,
    string $map,
    int $STORAGE
): array

Exports image pixels into an array. The map defines the ordering of the exported pixels. The size of the returned array is width * height * strlen(map). 此方法在Imagick基于ImageMagick 6.4.7以上版本编译时可用。

参数

x: X-coordinate of the exported area
y: Y-coordinate of the exported area
width: Width of the exported aread
height: Height of the exported area
map: Ordering of the exported pixels. For example "RGB". Valid characters for the map are R, G, B, A, O, C, Y, M, K, I and P.
STORAGE: Refer to this list of pixel type constants

返回值

Returns an array containing the pixels values.

错误／异常

错误时抛出 ImagickException。

示例

示例 #1 Using Imagick::exportImagePixels()

Export image pixels into an array

<?php

/* Create new object */
$im = new Imagick();

/* Create new image */
$im->newPseudoImage(0, 0, "magick:rose");

/* Export the image pixels */
$pixels = $im->exportImagePixels(10, 10, 2, 2, "RGB", Imagick::PIXEL_CHAR);

/* Output */
var_dump($pixels);
?>

以上示例会输出：

array(12) {
  [0]=>
  int(72)
  [1]=>
  int(64)
  [2]=>
  int(57)
  [3]=>
  int(69)
  [4]=>
  int(59)
  [5]=>
  int(43)
  [6]=>
  int(124)
  [7]=>
  int(120)
  [8]=>
  int(-96)
  [9]=>
  int(91)
  [10]=>
  int(84)
  [11]=>
  int(111)
}

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P S ¶

2 years ago

These are the letters for the map:

R = red
G = green
B = blue
A = alpha (0 is transparent)
O = alpha (0 is opaque)
C = cyan
Y = yellow
M = magenta
K = black
I = intensity (for grayscale)
P = pad

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备份地址：http://www.lvesu.com/blog/php/imagick.exportimagepixels.php