F_VN_HistogramEqualizationExp
Equalize the histogram of a grayscale or color image, which normalizes the brightness and improves the contrast. (expert function)
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:
FUNCTION F_VN_HistogramEqualizationExp : HRESULT
VAR_INPUT
ipSrcImage : ITcVnImage;
ipDestImage : Reference To ITcVnImage;
nChannelIdx : INT;
hrPrev : HRESULT;
END_VAR
Inputs
|
Name |
Type |
Description |
|---|---|---|
|
ipSrcImage |
Source image (USINT) | |
|
ipDestImage |
Reference To ITcVnImage |
Destination image (An appropriate destination image will be created if required.) |
|
nChannelIdx |
INT |
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) |
|
hrPrev |
HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.) |
Return valueRequired License
TC3 Vision Base
System Requirements
Development environment | Target platform | PLC libraries to include |
|---|---|---|
TwinCAT V3.1.4024.59 or later | PC or CX (x64) with min. PL50, e.g. Intel 4-core Atom CPU | Tc3_Vision |