Change the brightness, contrast, and sharpness of images to correct chromatic aberration and improve resolution - Edge Security Acceleration

If chromatic aberration or blurred images due to camera settings or device compatibility occur, you can use the feature provided by Alibaba Cloud CDN to change the brightness, contrast, and sharpness of images to improve image resolution and visual effects.

Note

The image editing feature of Alibaba Cloud CDN, the image editing feature of Dynamic Content Delivery Network (DCDN), and the Image Processing (IMG) feature of Object Storage Service (OSS) are three different features.
Image editing is a paid service. It is free of charge until further notice.
The image processing feature is in private review. To use this feature, submit a ticket.

Parameters

The following table describes the parameters.

Parameter	Description	Valid value
bright	The percentage by which you want to adjust the image brightness.	[-100, 100] A value smaller than 0 decreases the brightness of the image. A value of 0 does not change the brightness of the image. A value greater than 0 increases the brightness of the image.
contrast	The contrast of the image.	[-100,100] A value smaller than 0 decreases the contrast. A value of 0 does not change the contrast. A value greater than 0 increases the contrast.
sharpen	The sharpness of the image.	[50,399] A greater value specifies a clearer image. However, an excessively large value may result in image artifacts. We recommend that you use the following values: 50, 100, 150, 200, 250, and 300.

Examples

Sharpen an image by setting the sharpen parameter to 100. The request URL is http(s)://example.com/image01.png?image_process=sharpen,100.
Increase the brightness of the image by 50. The request URL is: http(s)://example.com/image01.png?image_process=bright,50.
Reduce the contrast of the image by 50. The request URL is http(s)://example.com/image01.png?image_process=contrast,50.