Image Cropping and Scaling

Overview
The real-time image processing feature of VOD allows you to scale and crop images.
Category
Operation
Scaling
The width is adjusted to the specified value, and the height changes with it proportionally.
﻿
The height is adjusted to the specified value, and the width changes with it proportionally.
﻿
The long sides are adjusted to the specified length, and the short sides change with them proportionally.
﻿
The short sides are adjusted to the specified length, and the long sides change with them proportionally.
﻿
Adjust both the width and height as specified
Cropping
Crop to a circle with the specified radius
﻿
Crop to a rectangle with the specified height and width
Compared with traditional image editing, VOD's real-time image processing feature has the following strengths:
Aspect
Traditional Image Editing
VOD Real-Time Image Processing
Processing steps
Multiple steps are required, including download, editing, and upload, which are time-consuming and laborious.
All operations are performed directly in the cloud, with no need for download or upload.
Ease of use
You need to have some knowledge of image editing to be able to use image editing software.
You can edit images in real time simply by specifying URL parameters.
Access speed
Image access and download through cloud storage URLs are slow, affecting the user experience.
VOD uses CDN to accelerate global image delivery, so that you can get the processed images in very little time.
Use Cases
Use Case
Description
User profile photo
User profile photos are usually circular or square images of the same resolution. You can use VOD's scaling and cropping capability to generate them.
Photo ID
Photos taken for identity documents may need to be cropped in order to meet the requirements.
Image close-up
An image may need to be cropped for close-ups.
How to Use
To learn about how to use the feature, see Real-Time Image Processing.
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Category	Operation
Scaling	The width is adjusted to the specified value, and the height changes with it proportionally.
		The height is adjusted to the specified value, and the width changes with it proportionally.
		The long sides are adjusted to the specified length, and the short sides change with them proportionally.
		The short sides are adjusted to the specified length, and the long sides change with them proportionally.
		Adjust both the width and height as specified
Cropping	Crop to a circle with the specified radius
Cropping		Crop to a rectangle with the specified height and width

Aspect	Traditional Image Editing	VOD Real-Time Image Processing
Processing steps	Multiple steps are required, including download, editing, and upload, which are time-consuming and laborious.	All operations are performed directly in the cloud, with no need for download or upload.
Ease of use	You need to have some knowledge of image editing to be able to use image editing software.	You can edit images in real time simply by specifying URL parameters.
Access speed	Image access and download through cloud storage URLs are slow, affecting the user experience.	VOD uses CDN to accelerate global image delivery, so that you can get the processed images in very little time.

Use Case	Description
User profile photo	User profile photos are usually circular or square images of the same resolution. You can use VOD's scaling and cropping capability to generate them.
Photo ID	Photos taken for identity documents may need to be cropped in order to meet the requirements.
Image close-up	An image may need to be cropped for close-ups.

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