IG_REC_image

Performs immediate image inversion of the image.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_REC_image_invert( HIG_REC_IMAGE hImageIn, LPAT_RECT lpRect );

Arguments:

hImageIn	Handle of the image to be inverted.
lpRect	Pointer to the rectangular area to be inverted. If it is NULL the entire image is inverted.

Return Value:

Returns the number of ImageGear errors that occurred during this function call.

Supported Raster Image Formats:

See IG_REC_image_import.

Remarks:

This function ignores the image inversion mode setting. The inverted image replaces the original one and is available to the recognition engine and the application.

For B/W images, the most usual inversion is from white-on-black to black-on-white, because the latter is needed for successful recognition.
For grayscale images, each pixel value is transformed to its complementary value, e.g., for a 4-bit image, a value of 11 is inverted to 4.
For color images, each color component is inverted to its complementary value.

Example:

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AT_ERRCOUNT ErrCount = 0; HIG_REC_IMAGE higRecImage = 0; HIGEAR higImage = 0; AT_RECT Rect; ErrCount += IG_load_file("Image.tif", &higImage); ErrCount += IG_REC_image_import(higImage, &higRecImage); //... memset(&Rect, 0, sizeof(Rect)); Rect.right = 100; Rect.bottom = 100; ErrCount += IG_REC_image_invert(higRecImage, &Rect); ErrCount += IG_REC_image_recognize(higRecImage); //... ErrCount += IG_REC_image_delete(higRecImage); ErrCount += IG_image_delete(higImage);

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AT_ERRCOUNT ErrCount = 0;
HIG_REC_IMAGE higRecImage = 0;
HIGEAR higImage = 0;
AT_RECT Rect; 

ErrCount += IG_load_file("Image.tif", &higImage); 
ErrCount += IG_REC_image_import(higImage, &higRecImage);

//...

memset(&Rect, 0, sizeof(Rect));
Rect.right = 100;
Rect.bottom = 100;
ErrCount += IG_REC_image_invert(higRecImage, &Rect);
ErrCount += IG_REC_image_recognize(higRecImage);

//...

ErrCount += IG_REC_image_delete(higRecImage);
ErrCount += IG_image_delete(higImage);