User's Manual

6 Scanner Support—Chapter
221700 Series Color Mobile Computer User’s Manual
IImage Interface
The IImage interface gives the application the capability to acquire images.
The image acquired can be either a raw image as captured by the digital
camera or it can be normalized. A normalized image is presented the same
as if the picture were taken at right angles to the image and at the same
distance. The normalized image is commonly used for signature capture
applications.
S IImage::ReadSigCapBuffer (page 221)
S IImage::ReadSigCapFile (page 224)
S IImage::ReadImage (page 225)
S IImage::CancelReadImage (page 226)
S IImage::Start (page 226)
S IImage::Stop (page 227)
S IImage::Open (page 227)
S IImage::Close (page 228)
IImage::ReadSigCapBuffer
Syntax
HRESULT IImage::ReadSigCapBuffer( ITC_SIGCAP_SPEC
*pSigCapSpec, ITC_IMAGE_SPEC *pImgBuffer, DWORD nMaxBuffSize
);
Parameters
Parameters:
pSigCapSpec [in] Pointer to the structure that identifies the signature
capture region. This structure is defined as follows:
typedef struct tagITCSigCapSpec
{
DWORD dwStructSize;
INT iAspectRatio;
INT iOffsetX;
INT iOffsetY;
UINT uiWidth;
UINT uiHeight;
INT iResolution;
ITCFileFormat eFormat;
DWORD eDepth;
} ITC_SIGCAP_SPEC;
where:
S dwStructSize Size, in bytes, of this struct. This is for version control.
S iAspectRatio Ratio of the bar code height (linear bar codes) or row
height (2D bar codes) to the narrow element width.
S iOffsetX Offset in X direction, relative to barcode center.
Positive values are right of the bar code, negative
values to the left.