Assign Color To Points
Function Description: It is used to manually modify the color of the point cloud, including fixed color, mixed color, and automatic intensity.
Steps
In the Toolbox, select Data Management >> Point Cloud Tools >> Assign Color To Points, or directly enter Assign Color To Points in the search bar, and double-click to display the interface as follows:
Set the classes where the target point cloud is located;
Check Selection to activate the selection tool (This operation is optional), which provides general selection tools for polygons, rectangles, spheres, etc. Unchecked Subtract Indicates additional selection. Click In to show only the selected area. Clear is used to clear all selections.
Check the Color to activate the color settings tool (this operation is optional). By setting an input color, you can change only the target color points.
- Tolerance: Represents the color difference ratio. Color points within the tolerance range of the target color will be selected.
Set the point cloud mode, there are some modes: Constant, Mixture, Intensity Auto, Intensity Custom and Closest Colored Point, which are introduced below:
Constant: There are three control tools: RGB input box, preview color block, and dot color eyedropper, which are used to specify a fixed color. You can set the color by entering the RGB value, clicking the preview color block to select the color, and selecting the color of a point in the 3D view with the point color eyedropper.
Mixtrue: Click on the preview color swatch to activate the Color Mixture pop-up window as follows. Generate random colors by setting a set of HSV and deviation values. where H stands for hue and values range from 0 to 359. S stands for saturation and values range from 0 to 255. V stands for brightness and values range from 0 to 255. Click OK to complete the color mixing result.
Intensity Auto: This mode requires the point cloud to have intensity information. The intensity value is automatically mapped and filled into the RGB attribute, and the value is the same for each color channel.
Intensity Custom: The pattern requires point cloud data to have intensity information, and users can manually define the intensity stretching range. The default value is the parameters adopted in the Intensity Auto mode.
Note: Although the interface provides a setting range of 0 to 255, for data ranging from 0 to 65535, the program will automatically map it to 0 to 65535.
- **Closest Colored Point**: If the **Color** is checked, this mode assigns the nearest non-target color to target color points. If the **Color** is not checked, this mode assigns the nearest valid color to uncolored points (white points).
- **Search Radius**: Neighborhood search radius. The point will not be assigned a color when the distance to the nearest valid color point is greater than this value.
After clicking Preview, the new color results can be viewed in the 3D view. This operation is for display purposes only and will not modify the color values of the point cloud. If you are not satisfied with the current operation, you can use Undo and Redo to revert steps. Please note that Preview, Undo, and Redo are not effective for the Closest Colored Point mode.
After previewing, click Save to write the color results to the point cloud file.
Note: Except for Closest Colored Point mode, all other modes require clicking Preview before saving. Furthermore, the save operation cannot be undone.