F_VN_SauvolaThreshold
Apply Sauvola local threshold to source image.
Syntax
Definition:
FUNCTION F_VN_SauvolaThreshold : HRESULT
VAR_INPUT
ipSrcImage : ITcVnImage;
pipDestImage : Reference To ITcVnImage;
nBlockSize : UDINT;
fParamK : LREAL;
fMaxSigma : LREAL;
eThresholdType : ETcVnThresholdType;
hrPrev : HRESULT;
END_VARInputs
|
Name |
Type |
Description |
|---|---|---|
|
ipSrcImage |
Source image (USINT, UINT, INT, REAL, or LREAL, 1 channel) | |
|
pipDestImage |
Reference To ITcVnImage |
Destination image (An appropriate single channel destination image will be created if required.)) |
|
nBlockSize |
UDINT |
Size of the pixel neighborhood to calculate the local threshold (3, 5, 7, ...) |
|
fParamK |
LREAL |
parameter K which takes positive values in range (0,1). Recommended are K in range [0.2, 0.5] |
|
fMaxSigma |
LREAL |
Maximum value of the standard deviation, required to be strictly positive. (fMaxSigma = 128 for a grayscale document). |
|
eThresholdType |
Threshold type to be applied. Supported are TCVN_TT_BINARY and TCVN_TT_BINARY_INV. | |
|
hrPrev |
HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.) |
Required 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 PL50, e.g. Intel 4-core Atom CPU | Tc3_Vision |