L_AverageFilterBitmap
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_AverageFilterBitmap(pBitmap, uDim)
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pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
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L_UINT uDim; |
/* size of the averaging neighborhood */ |
Changes the color of each pixel in a bitmap to the average color of pixels in its neighborhood. This results in a blur effect.
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Parameter |
Description |
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pBitmap |
Pointer to the bitmap handle referencing the bitmap to average. |
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uDim |
Size of the averaging neighborhood. It is the length, in pixels, of one side of a square. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
You control the amount of blur by specifying the size of the neighborhood that is used for averaging.
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. |
Platforms
Windows 95 / 98 / Me, Windows 2000 / XP, Windows CE.
See Also
Example
For complete sample code, refer to the CHILD.C module of the DEMO example.
/* This example loads a bitmap and applies an average filter. */
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */
/* Load the bitmap, keeping the bits per pixel of the file */
L_LoadBitmap (TEXT("IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
/* Average with a neighborhood of 3x3 pixels */
L_AverageFilterBitmap(&LeadBitmap, 3 );