OCR

Detects and recognizes characters in a binary image (white characters on black background).

Syntax

Definition:

HRESULT OCR(
    HRESULT          hrPrev,
    ITcVnImage*      ipSrcImage,
    ULONGLONG        eModel,
    ITcVnContainer*& ipCharacters,
    float&           fMinConfidence,
    PCCH             sPattern = "",
    ULONG            eOcrOptions = OO_NONE,
    ITcVnContainer** pipBoundingBoxes = nullptr,
    ITcVnContainer** pipConfidences = nullptr
)

Parameters

Name

Type

Default

Description

hrPrev

HRESULT

 

HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

ipSrcImage

ITcVnImage*

 

Source image (USINT, 1 channel, binary)

eModel

ULONGLONG

 

Selection of OCR model types (ETcVnOcrModelType)

ipCharacters

ITcVnContainer*&

 

Returns the recognized characters (ContainerType_Vector_String_SINT)

fMinConfidence

float&

 

Returns the minimum value of the confidences

sPattern

PCCH

""

String pattern containing the format in which characters are presented

eOcrOptions

ULONG

OO_NONE

Specifies which options must be applied to the function (ETcVnOcrOptions)

pipBoundingBoxes

ITcVnContainer**

nullptr

Returns the corresponding bounding boxes of the recognized characters (ContainerType_Vector_TcVnRectangle_DINT, optional, set to 0 if not required)

pipConfidences

ITcVnContainer**

nullptr

Returns the corresponding classification confidences of the recognized characters (ContainerType_Vector_REAL, optional, set to 0 if not required)

OCR 1: Return value

HRESULT

Required License

TC3 Vision OCR

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