CodeIgniter the way to realize the intelligent cropping picture _php Tutorial

A pair of 1024x768-sized pictures, cut to 240*240 size, cut not distorted, as far as possible to retain the theme of the picture.

The method I used:

1. First, the picture is shortened to the size that can be cropped;

In the case of a wide-format image, zoom to height by height = 240px, narrow picture (height greater than width) is scaled by width, etc.

2. Center crop by the long width format;

Keep the middle part of the image after the thumbnail;

Copy the Code code as follows:
$this->load->library (' image_lib ');
List ($width, $height) = getimagesize ("upload/123.jpg");
$config [' image_library '] = ' gd2 ';
$config [' source_image '] = ' upload/123.jpg ';
$config [' maintain_ratio '] = TRUE;
if ($width >= $height)
{
$config [' master_dim '] = ' height ';
}else{
$config [' master_dim '] = ' width ';
}
$config [' width '] = 240;
$config [' height '] = 240;
$this->image_lib->initialize ($config);
$this->image_lib->resize ();

$config [' maintain_ratio '] = FALSE;
if ($width >= $height)
{
$config [' x_axis '] = Floor (($width * 240/$height-240)/2);
}else{
$config [' y_axis '] = Floor (($height * 240/$width-240)/2);
}
$this->image_lib->initialize ($config);
$this->image_lib->crop ();

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