Image compression refers to reducing an image's size as much as possible without changing its quality so as to reduce its storage and traffic costs and speed up access.
COS has launched a variety of image compression methods based on CI for your choice according to your business scenario. Currently supported compression methods are as follows:
Note:Image compression is a paid service charged by CI. For detailed pricing, see the image processing prices of CI.
The image compression feature meets the needs of image compression on various terminals such as PC and app in diverse use cases like ecommerce and media. This effectively reduces the transmission time, loading time, and use of bandwidth and traffic.
Different compression features have different compatibility with existing image formats and browser environments as detailed below:
Feature | Supported Formats | Supported Browsers and Systems | Compatibility | Compression Effect | Compression Speed |
---|---|---|---|---|---|
WebP compression | .jpg, .png, .bmp, .gif, .heif, .tpg, and .avif | More than 95% of browsers and systems such as Edge, Firefox, Chrome, Safari, Android, iOS, and WeChat | Strong | Average | Fast |
HEIF compression | .jpg, .png, .bmp, .webp, and .avif | Not supported in browsers but natively supported on iOS 11 or later and Android P | Weak | Strong | Fast |
TPG compression | .jpg, .png, .bmp, .gif, .heif, .webp, and .avif | Only a few browsers such as QQ Browser as special decoders are required | Weak | Strong | Fast |
AVIF compression | .jpg, .png, .bmp, .gif, .heif, .webp, and .tpg | A few browsers and systems such as Firefox, Chrome, and Android | Weak | Very strong | Slow |
Note:To use the TPG format, ensure that the environment where images are loaded supports TPG decoding. CI provides the TPG decoder-integrated SDKs for iOS, Android, and Windows to facilitate quick integration with TPG.
You can use the above compression features through the format conversion capabilities of basic image processing. To do so, set the format
parameter to the desired compression format. Specific parameters are as follows:
Parameter | Description |
---|---|
webp | Converts the original image to .webp format for compression. |
heif | Converts the original image to .heif format for compression. |
tpg | Converts the original image to .tpg format for compression. |
avif | Converts the original image to .avif format for compression. |
The following examples convert the original image in .png format at https://ci-avif-demo-1258125638.cos.ap-guangzhou.myqcloud.com/test-png.png
to .jpeg, .webp, .heif, .tpg, and .avif formats respectively. The effects are as follows:
Final request URL:
https://ci-avif-demo-1258125638.cos.ap-guangzhou.myqcloud.com/test-png.png?imageMogr2/format/jpeg
Final request URL:
https://ci-avif-demo-1258125638.cos.ap-guangzhou.myqcloud.com/test-png.png?imageMogr2/format/webp
Final request URL:
https://ci-avif-demo-1258125638.cos.ap-guangzhou.myqcloud.com/test-png.png?imageMogr2/format/heif
Final request URL:
https://ci-avif-demo-1258125638.cos.ap-guangzhou.myqcloud.com/test-png.png?imageMogr2/format/tpg
Final request URL:
https://ci-avif-demo-1258125638.cos.ap-guangzhou.myqcloud.com/test-png.png?imageMogr2/format/avif
The following table lists the compression ratio comparison of different image compression methods:
Format | Size |
---|---|
.png (original image) | 465 KB |
.jpeg | 114 KB (75.5% smaller) |
.webp | 64 KB (86.2% smaller) |
.heif | 54 KB (88.4% smaller) |
.tpg | 56 KB (88.0% smaller) |
.avif | 32 KB (93.1% smaller) |
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