L_GaussianFilterBitmap
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_GaussianFilterBitmap(pBitmap, nRadius)
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pBITMAPHANDLE pBitmap; |
/* pointer to a bitmap handle */ |
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L_INT nRadius; |
/* radius of the neighborhood */ |
Smooths or blurs an image by applying a Gaussian filter to the specified bitmap.
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Parameter |
Description |
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pBitmap |
Pointer to a bitmap handle that references the bitmap to process with the Gaussian filter. |
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nRadius |
Value that indicates the radius of the neighborhood on which the filter is applied. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
Each pixel in the bitmap is blurred based on neighborhood pixels. The parameter nRadius determines the size of the neighborhood to consider when blurring a pixel. The result is a blurred version of the original image.
The amount of blur is controlled by specifying the size of the neighborhood used for blurring or smoothing. The value of the nRadius parameter determines the size and values of the mask.
To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.
This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.
Required DLLs and Libraries
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LTIMG For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
See Also
Example
/* This example loads a bitmap and applies the Gaussian filter */
BITMAPHANDLE LeadBitmap;
L_LoadBitmap (TEXT("IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
L_GaussianFilterBitmap (&LeadBitmap, 20);