2.6.1.5 imgColorReplace

Menu Information

Image: Adjustments: Color Replace

Brief Information

Replace color within pre-defined color range

Command Line Usage

1. imgColorReplace fuzz:=30 r:=255 g:=255 b:=0;

2. imgColorReplace fuzz:=70 adj_b:=-20 adj_s:=-50 adj_h:=-90;

3. imgColorReplace oimg:=<input>;

Variables

Display
Name
Variable
Name
I/O
and
Type
Default
Value
Description
Input Matrix img

Input

Image

<active>

Specifies the input image to be manipulated. The default input is the active image.

Output Image oimg

Output

Image

<new>

Specifies the output image. By default, a new image will be created and used as output. See the syntax here.

Fuzziness fuzzi

Input

int

50

Specifies the Fuzziness value which is used for determining a color range around the specified color. The colors within this range are similar to the specified color and all of them will be replaced. Note that fuzziness value should be an integer between 1 and 100

Replace Red r

Input

int

128

Specifies the red component of the color to be replaced. The value should be an integer between 0 and 255

Replace Green g

Input

int

128

Specifies the green component of the color to be replaced. The value should be an integer between 0 and 255

Replace Blue b

Input

int

128

Specifies the blue component of the color to be replaced. The value should be an integer between 0 and 255

Adjust Brightness adj_b

Input

int

50

Specifies the percentage increase/decrease of the brightness for the colors to be replaced. The value should be an integer between -100 and 100. A negative value will cause the brightness to be reduced while a positive value will result in brightness increase.

Adjust Saturation adj_s

Input

int

50

Specifies the percentage increase/decrease of the saturation for the colors to be replaced. The value should be an integer between -100 and 100. A negative value will cause the saturation to be reduced while a positive value will result in saturation increase.

Adjust Hue adj_h

Input

int

0

Specifies the percentage increase/decrease of the hue for the colors to be replaced. The value should be an integer between -180 and 180. A negative value will cause the hue to be reduced while a positive value will result in hue increase.

Description

This function adjusts the brightness, saturation and hue of the specified color to replace it with another color. You can specify the color to be replaced with its RGB components.

You can opt to replace the colors similar to the specified color with the Fuzziness variable. By doing this, you are likely to get a smooth output image with a range of color replaced.

Examples

The following example shows you how to change the color of the input image:

1. Create a new matrix and import red camellia.jpg under \Samples\Image Processing and Analysis folder into it.

2. Select Image: Adjustment: Color Replace... from the menu to open the dialog. Change the settings as shown below and click OK.

ImgColorReplace help English files image002-1.jpg
ImgColorReplace help English files image004-1.jpg
ImgColorReplace help English files image006-1.jpg
The original image
The output image


Algorithm

The function first determines the specified color with the input R, G, B values, and then calculates the color range around the specified color. Finally, it applies the adjusted brightness, saturation and hue values to the pixels within the color range.

For more information, please refer to the LEADTOOLS Main API Help file, Version 14 and read the L_ColorReplaceBitmap topic.

References

LEADTOOLS Main API Help file, Version 14

Related X-Functions

imgBrightness, imgSaturation, imgHue