HistogramEqualization
Equalize the histogram of a grayscale or color image, which normalizes the brightness and improves the contrast.
The channel index that should be equalized has to be specified (-1 expects a RGB image, converts it to YCbCr, equalizes the Y channel and converts the image back to RGB).
Can use available TwinCAT Job Tasks for executing parallel code regions.
Syntax
Definition:
HRESULT HistogramEqualization(
HRESULT hrPrev,
ITcVnImage* ipSrcImage,
ITcVnImage*& ipDestImage,
SHORT nChannelIdx = -1
)
Parameters
|
Name |
Type |
Default |
Description |
|---|---|---|---|
|
hrPrev |
|
HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.) | |
|
ipSrcImage |
|
Source image (USINT) | |
|
ipDestImage |
|
Destination image (An appropriate destination image will be created if required.) | |
|
nChannelIdx |
SHORT |
-1 |
Index of the image channel that should be equalized (-1 expects a RGB image, converts it to YCbCr, equalizes the Y channel and converts the image back to RGB) |
Return valueRequired License
TC3 Vision Base
System Requirements
Development environment | Target platform | PLC libraries to include |
|---|---|---|
TwinCAT V3.1.4024.54 or later | PC or CX (x64) with PL50, e.g. Intel 4-core Atom CPU | Tc3_Vision |