PHP |想象一下 getImageChannelStatistics()函数

Imagick::getImageChannelStatistics()函数是PHP中的一个内置函数，用于获取图像中每个通道的统计信息。

句法：

array Imagick::getImageChannelStatistics( void )

参数：此函数不接受任何参数。

异常：此函数在出错时抛出 ImagickException。

返回值：该函数返回一个以统计数据为数组成员的数组。

下面的程序说明了PHP中的Imagick::getImageChannelStatistics()函数：

方案一：

getImageChannelStatistics();
print("
".print_r($statistics, true)."
");
?>

输出：

Array
(
    [0] => Array
        (
            [mean] => 0
            [minima] => 1.7976931348623E+308
            [maxima] => -1.7976931348623E+308
            [standardDeviation] => 0
            [depth] => 1
        )

    [1] => Array
        (
            [mean] => 56510.812968516
            [minima] => 0
            [maxima] => 65535
            [standardDeviation] => 20404.259764873
            [depth] => 8
        )

    [2] => Array
        (
            [mean] => 61143.413450883
            [minima] => 5654
            [maxima] => 65535
            [standardDeviation] => 10656.363052485
            [depth] => 8
        )

    [4] => Array
        (
            [mean] => 57923.358076397
            [minima] => 1799
            [maxima] => 65535
            [standardDeviation] => 17257.063161026
            [depth] => 8
        )

    [8] => Array
        (
            [mean] => 0
            [minima] => 0
            [maxima] => 0
            [standardDeviation] => 0
            [depth] => 1
        )

    [32] => Array
        (
            [mean] => 0
            [minima] => 1.7976931348623E+308
            [maxima] => -1.7976931348623E+308
            [standardDeviation] => 0
            [depth] => 1
        )

)

方案二：

getImageChannelStatistics();
print("
".print_r($statistics, true)."
");
?>

输出：

Array
(
    [0] => Array
        (
            [mean] => 0
            [minima] => 1.7976931348623E+308
            [maxima] => -1.7976931348623E+308
            [standardDeviation] => 0
            [depth] => 1
        )

    [1] => Array
        (
            [mean] => 56510.812968516
            [minima] => 0
            [maxima] => 65535
            [standardDeviation] => 20404.259764873
            [depth] => 8
        )

    [2] => Array
        (
            [mean] => 61143.413450883
            [minima] => 5654
            [maxima] => 65535
            [standardDeviation] => 10656.363052485
            [depth] => 8
        )

    [4] => Array
        (
            [mean] => 65535
            [minima] => 65535
            [maxima] => 65535
            [standardDeviation] => 0
            [depth] => 1
        )

    [8] => Array
        (
            [mean] => 0
            [minima] => 0
            [maxima] => 0
            [standardDeviation] => 0
            [depth] => 1
        )

    [32] => Array
        (
            [mean] => 0
            [minima] => 1.7976931348623E+308
            [maxima] => -1.7976931348623E+308
            [standardDeviation] => 0
            [depth] => 1
        )

)

参考： https://www. PHP.net/manual/en/imagick.getimagechannelstatistics。 PHP