Alibaba Cloud Content Delivery Network (CDN) allows you to resize images. This topic describes how to resize images and provides examples of how to resize images.
Note
- This feature is in private preview. To participate in the private preview, submit a ticket.
- This feature is free of charge during the private preview. After it is officially released, it charges fees. For more information, see the product updates.
Parameters
Set the action to resize.
The following table describes the parameters.
| Parameter | Description | Valid value |
|---|---|---|
| w | Specifies the width to which the image is to be resized. | The default value is 0. Unit: pixels. Both the width and height can be at most 4,096 pixels. |
| h | Specifies the height to which the image is to be resized. | |
| l | Specifies the length of the longer side to which the image is to be resized. | |
| s | Specifies the length of the shorter side to which the image is to be resized. | |
| fw and fh | Specifies the width and height to which the image is to be resized. | |
| p | Specifies that the image is resized based on a specific aspect ratio of the original image size. | [0,100] |
Features and examples
The following table provides examples of resizing images.
Note If any of the preceding parameters is set to a negative value, the image remains in
its original size.
| Feature | Description | Example |
|---|---|---|
| Based on a specific aspect ratio | Resize an image based on a specific aspect ratio of the original image size. | image_process=resize,p_80 |
| Based on conditions | Resize an image only when the image is equal to or larger than 1,024,000 bytes. Unit:
bytes.
Note The threshold 1,024,000 bytes is used as an example. You can set the threshold based
on your business requirements.
|
image_process=resize,l_200/threshold_1024000 |
| Based on the longer side | Resize an image based on the specified length of the longer side. | image_process=resize,l_200 |
| Based on the shorter side. | Resize an image based on the specified length of the shorter side. | image_process=resize,s_200 |
| Based on the width | Resize an image based on the specified width. | image_process=resize,w_200 |
| Based on the height | Resize an image based on the specified height. | image_process=resize,h_200 |
| Based on the specified height and width | Resize an image based on the specified width and height. | image_process=resize,fw_200,fh_200 |