PHP |想象一下 setImageResolution()函数

Imagick::setImageResolution()函数是PHP中的一个内置函数，用于设置图像对象的分辨率。
句法：

bool Imagick::setImageResolution($x_resolution, $y_resolution)

参数：此函数接受上面提到的两个参数，如下所述：

• $x_resolution：必填参数，指定x轴分辨率。
• $y_resolution：必填参数，指定y轴分辨率。

返回值：此函数将分辨率作为数组返回。
下面的程序说明了PHP中的Imagick::setImageResolution()函数：
原图：

方案一：

php

getImageResolution();
echo "X = ".$res['x'] . "
";
echo "Y = ".$res['y'] . "
";
 
// Function to set image resolution
$imagick->setImageResolution(50, 50);
 
 
echo "After Set Resolution: 
";
 
// Getting Resolution of image
// using getimageresolution function
$res = $imagick->getImageResolution();
echo "X = " . $res['x'] . "
";
echo "Y = " . $res['y'] . "
";
?>

输出：

X = 37.8
Y = 37.8
After Set Resolution:
X = 50
Y = 50

原图：

方案二：

PHP

setFillColor(new ImagickPixel('green'));
   
// Set the text font size
$draw->setFontSize(50);
   
$matrix = $im->queryFontMetrics($draw, $string);
$draw->annotation(0, 40, $string);
$im->newImage($matrix['textWidth'], $matrix['textHeight'],
         new ImagickPixel('white'));
            
// Draw the image         
$im->drawImage($draw);
echo "Before: 
";
 
// Getting Resolution of created image
// using getimageresolution function
$res = $im->getImageResolution();
echo "X = ".$res['x'] . "
";
echo "Y = ".$res['y'] ." 
";
 
 
// Set image resolution (50, 50)
$im->setImageResolution(50, 50);
 
echo "After:
 ";
 
// Getting Resolution of created image
// using getimageresolution function
$res = $im->getImageResolution();
echo "X = ".$res['x'] . "
";
echo "Y = ".$res['y'] ." 
";
?>

输出：

Before:
X = 0
Y = 0
After:
X = 50
Y = 50

参考： http: PHP。 PHP