Help Center/ Object Storage Service/ User Guide/ Data Processing/ Image Processing/ Setting Image Effects
Updated on 2024-10-24 GMT+08:00
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Setting Image Effects

Setting the Brightness

You can use the GUI or code mode on OBS Console or make an API call to adjust the brightness of an image.

Table 1 describes the parameters.

This operation is represented by bright.

Table 1 Brightness parameters

Parameter

Value Description

Code Example

value

It adjusts the brightness of an image and ranges from -100 to 100.

The original brightness value is 0. A larger value means a higher level of brightness.

image/bright,50

Examples of Setting the Brightness

  • Set the brightness to 50.

https://hw-image-demo.obs.ap-southeast-1.myhuaweicloud.com/example.jpg?x-image-process=image/bright,50

  • Set the brightness to -50.

https://hw-image-demo.obs.ap-southeast-1.myhuaweicloud.com/example.jpg?x-image-process=image/bright,-50

Setting the Contrast

You can use the GUI or code mode on OBS Console or make an API call to adjust the contrast of an image.

Table 2 describes the parameters.

This operation is represented by contrast.

Table 2 Contrast parameters

Parameter

Value Description

Code Example

value

It adjusts the contrast of an image and ranges from -100 to 100.

The original contrast value is 0. A larger value means a higher level of contrast.

image/contrast,-50

Example of Setting the Contrast

  • Set the contrast to -50.

https://hw-image-demo.obs.ap-southeast-1.myhuaweicloud.com/example.jpg?x-image-process=image/contrast,-50

Setting the Sharpness

You can use the GUI or code mode on OBS Console or make an API call to adjust the sharpness of an image.

Table 3 describes the parameters.

This operation is represented by sharpen.

Table 3 Sharpness parameters

Parameter

Value Description

Code Example

value

It adjusts the sharpness of an image and ranges from 50 to 399.

The recommended value is 100. Technically, a larger value means a clearer image, but a too large value will make the image grainy.

image/sharpen,100

Example of Setting the Sharpness

  • Set the sharpness to 100.

https://hw-image-demo.obs.ap-southeast-1.myhuaweicloud.com/example.jpg?x-image-process=image/sharpen,100

Setting the Blur

You can use the GUI or code mode on OBS Console or make an API call to adjust the blur of an image.

Table 4 describes the parameters.

This operation is represented by blur.

Table 4 Blur parameters

Parameter

Value Description

Code Example

r

It represents the blur radius. Its value ranges from 1 to 50.

A larger radius means a larger blurred area.

image/blur,r_3,s_2

s

It represents the standard deviation of normal distribution. Its value ranges from 1 to 50.

A large standard deviation significantly blurs, while a small standard deviation blurs less.

In GUI mode, the parameter r and s increase or decrease simultaneously.

Example of Setting the Blur

Setting the Grayscale

You can edit code on OBS Console or make an API call to convert an image to grayscale.

Table 5 describes the parameters.

This operation is represented by colorspace.

Table 5 Grayscale parameters

Parameter

Value Description

Code Example

value

It changes the color mode of an image. You can set the parameter to gray to convert the image to grayscale.

image/colorspace,gray

Example of Setting the Grayscale

  • Convert an image to grayscale.

https://hw-image-demo.obs.ap-southeast-1.myhuaweicloud.com/example.jpg?x-image-process=image/colorspace,gray

Parent Topic: Image Processing