Alibaba Cloud Content Delivery Network (CDN) allows you to crop images based on a specified size. This topic describes how to crop images and provides examples.

Note Image editing is a paid service. It is currently free of charge until further notice.

Parameters

Set the action to crop.

The following table describes the parameters.
Note If one of the preceding parameters is set to a negative value, the image remains in its original size.
Parameter Description Valid value
w The width of the cropped area. The default value is 0. The total pixels of the cropped area cannot exceed 16,777,216 pixels.
h The height of the cropped area.
x The X coordinate of the cropped area. The default value is the X coordinate of the upper-left corner of the image.
y The Y coordinate of the cropped area. The default value is the Y coordinate of the upper-left corner of the image.
g The position of the area to be cropped in a 3 by 3 grid. The image is located in a 3 by 3 grid, which has 9 tiles. Each tile is positioned by its upper-left corner.
  • nw: the upper-left tile
  • north: the upper-center tile
  • ne: the upper-right tile
  • west: the center-left tile
  • center: the center tile
  • east: the center-right tile
  • sw: the lower-left tile
  • south: the lower-center tile
  • se: the lower-right tile
For more information, see the following figure that shows the position of each tile in a 3 by 3 grid.
The following figure shows the position of each tile in a 3 by 3 grid. Crop images

Examples

The following table describes how to crop images.
Feature Description Example
Cropping in a circle shape You can specify the radius of a circle to crop an image. The radius can be at most half the length of the shorter side of the base image. 
image_process=circle,200
Cropping in a 3 by 3 grid An image can be represented by a 3 by 3 grid. You can specify the position of the tile in the grid that you want to crop. 
image_process=crop,w_200,h_200,g_se
Cropping based on an X and Y coordinate You can specify the X coordinate, y coordinate, width, and height to crop an image. The X and Y coordinate represents the lower-left corner of the cropped area. The width and height specify the size of the cropped area. 
image_process=crop,x_10,y_10,w_400,h_200
Centered cropping You can specify the width and height to crop equally on all four sides at a time. 
image_process=crop,mid,w_400,h_200