Color Selection

## Color Selection

Extract the target color region in the color image. The output result image satisfies: only the original three-channel gray values of the extracted color region are retained, and other regions are uniformly replaced with specified values.

## Module Principle
The color information of a color image can be characterized by RGB or HSV color space. After selecting the target color of interest, the target color region can be separated and extracted from the entire image based on its corresponding RGB or HSV numerical features.

## Usage Scenarios
Used when colors need to be classified

## Usage Method

### Usage Example
1. After selecting the color space, click "Color Region Extraction" first;
![](/media/202601/2026-01-14_114329_6424870.6848522478498017.png)
2. Drag the roi box to the specified position, click "Learn HSV/RGB Values in ROI Box", you can fine-tune the gray scale range extracted by RGB three channels or HSV three channels, and click OK;

![](/media/202601/2026-01-14_114939_2124670.5851318146214387.png)
3. Result

![](/media/202601/2026-01-14_115934_2576500.4093200900122498.png)
## Parameter Configuration Description
Color Space: Divided into RGB color space and HSV color space
Background Type: After color region extraction, the color of the non-extracted region uses the specified background;
Noise Removal: After color region extraction, some color regions may have a small area, which can be considered as noise and removed;
Show Original Image: Check to display the original image, uncheck to check the module running effect;
![](/media/202601/2026-01-14_115156_8537190.09175106175669678.png)
## Output Description
Running Result: Output True for successful running, False for failed running;
Color Image: Output color image;
![](/media/202601/2026-01-14_115522_3668040.0001789086842841625.png)

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Click here to jump to the corresponding Chinese manual page: [Color Selection](/doc/44)