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LFile::SaveTile

#include "ltwrappr.h"

virtual L_INT LFile::SaveTile(nCol, nRow, pSaveFileOption=NULL)

L_INT nCol;	left column number of the tile
L_INT nRow;	top row number of the tile
pSAVEFILEOPTION pSaveFileOption;	pointer to optional extended save options

Saves the class object's associated bitmap to a specified rectangular location in an existing FlashPix file. It only works with uncompressed FlashPix files. If a compressed FlashPix file is passed in, an error will be returned.

Parameter	Description
nCol	Left column number of tile.
nRow	Top row number of tile.
pSaveFileOption	Pointer to optional extended save options. Pass NULL to use the default save options.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This function supports the LFile::SaveFileTileCallBack virtual function.

This function only works with uncompressed FlashPix files.

Note: More information is available in the SAVEFILEOPTION structure.

Support for 12 and 16-bit grayscale images is only available in the Document/Medical toolkits.

This function does not support signed data images, unless they are DICOM images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image that is not a DICOM image is passed to this function.

This function supports signed data images, but only DICOM and TIFF formats support signed data. This function will return an error code if you attempt to save a signed image to a format other than DICOM or TIFF.

If the bitmap has a region, the region stored in the bitmap will be saved, if the image is saved as one of the TIFF file formats.

In LEADTOOLS version 17 and up, when saving a colored image (such as a 24-bits per pixel image) to bitonal (1-bit per pixel), the toolkit will not use any dithering when converting the image data. This is done because dithering is not the recommended when converting colored images containing text for document processing such as OCR and Barcode. The result text will be fuzzy and hard for a recognition engine to process. To save a colored image as bitonal with Floyd-Stein dithering (the behavior of LEADTOOLS 16.5 and earlier) use the ESO_USEDITHERINGMETHOD along with LBitmapBase::SetDitheringMethod as illustrated below:

// 'leadBitmap' is a colored LBitmapBase 
// 'leadFile' is LFile object 
// Setup FloydStein dithering: 
leadBitmap.SetDitheringMethod(FLOYD_STEIN_DITHERING); 
SAVEFILEOPTION saveOptions = {0}; 
leadFile.GetDefaultSaveFileOption(&saveOptions, sizeof(SAVEFILEOPTION)); 
saveOptions.Flags |= ESO_USEDITHERINGMETHOD; 
leadFile.Save(FILE_CCITT_GROUP4, 1, 0, 0, &saveOptions); 
// or any other Save overloads or methods