How to intelligently crop images using Codeigniter

Crop an image of 1024x768 to 240x240. The cropped image is not distorted and the topic meaning of the image is retained as much as possible.

The method I used:

1. scale down the image proportion to the cropped size;

For a wide image, scale the image to a height equal to PX. For a narrow image (the height is greater than the width), scale the image to a width equal to the width;

2. Center crop by length/width format;

Reserve the middle part of the scaled image;

Copy codeThe Code is 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 ['high'] = 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 ();