How to implement smart cropping of images with Codeigniter_PHP tutorial

A picture of size 1024*768, cropped to size 240*240, without distortion after cropping, and retain the theme and meaning of the picture as much as possible.

The method I used:

1. First scale down the image to a size that can be cropped;

If it is a wide picture, it will be scaled to height = 240px. If it is a narrow picture (height is greater than its width), it will be scaled in proportion to width;

2. Center crop according to length and width format;

Keep the middle part of the thumbnail image;

Copy code The 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['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->crop();

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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/788628.htmlTechArticleA picture of 1024*768 size, cropped to 240*240 size, no distortion after cropping, keep it as much as possible Image theme meaning. The method I used: 1. First reduce the picture to the same proportion so that it can be cropped...