L_SharpenBitmap (original) (raw)

Summary

Increases or decreases the sharpness of the image in the specified bitmap.

Syntax

#include "l_bitmap.h"

L_LTIMGEFX_API L_INT L_SharpenBitmap(pBitmap, nSharpness, uFlags)

Parameters

pBITMAPHANDLE pBitmap

Pointer to the bitmap handle that references the bitmap to be affected.

L_INT nSharpness

The amount to change the sharpness. Valid values range from -1000 to +1000.

L_UINT32 uFlags

Reserved for future use. Must be 0.

Returns

Comments

Negative values decrease the sharpness of the image. Specify -1000 for minimum sharpness. Positive values increase the sharpness. Specify +1000 for maximum sharpness.

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 in the Document and Medical Imaging toolkits.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Sharpen Function - Before

Sharpen Function - After

View additional platform support for this Sharpen function.

Required DLLs and Libraries

• LTIMGEFX
• 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

Win32, x64, Linux.

See Also

Functions

• L_PosterizeBitmap
• L_MosaicBitmap
• L_EmbossBitmap
• L_AverageFilterBitmap
• L_MedianFilterBitmap
• L_AddBitmapNoise
• L_IntensityDetectBitmap
• L_SpatialFilterBitmap
• L_BinaryFilterBitmap
• L_MaxFilterBitmap
• L_MinFilterBitmap
• L_OilifyBitmap
• L_SolarizeBitmap
• L_DlgSharpen
• L_WindowLevel
• L_SkeletonBitmap
• L_CorrelationBitmap
• L_BricksTextureBitmap
• L_DeskewBitmap
• L_DiffuseGlowBitmap
• L_GlowFilterBitmap
• L_HalfTonePatternBitmap
• L_HighPassFilterBitmap
• L_MaskConvolutionBitmap
• L_PerspectiveBitmap
• L_PlasmaFilterBitmap
• L_PointillistBitmap

Topics

• Raster Image Functions: Filtering Images
• Detecting and Enhancing Edges and Lines
• Raster Image Functions: Detecting and Enhancing Edges and Lines

Example

For complete sample code, refer to the CHILD.C module of the DEMO example.
This example loads a bitmap and increases its sharpness.

L_INT SharpenBitmapExample(L_VOID) { L_INT nRet; BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */ /* Load the bitmap, keeping the bits per pixel of the file */ nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("IMAGE1.CMP")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); if (nRet != SUCCESS) return nRet; /* Increase the sharpness by 25 percent of the possible range */ nRet = L_SharpenBitmap(&LeadBitmap, 250, 0); if (nRet != SUCCESS) return nRet; nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); if (nRet != SUCCESS) return nRet; //free bitmap if (LeadBitmap.Flags.Allocated) L_FreeBitmap(&LeadBitmap); return SUCCESS; }

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