LBitmap::MinFilter (original) (raw)

Summary

Dilates dark objects in the class objects bitmap by the specified amount.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::MinFilter(uDim=3, uFlags = 0)

Parameters

L_UINT uDim

Dimensions of the neighborhood used for filtering (uDim x uDim), in pixels.

L_UINT32 uFlags

Reserved for future use. Must be 0.

Returns

Comments

This is a more controlled version of the omni-directional dilation filter that you can set with the LBitmap::BinaryFilter function.

The effect can be controlled by specifying the size of the neighborhood that is used for calculating each pixel value. For example, for 8x8, pass 8 in the uDim parameter. Each pixel is replaced with the minimum value of its neighborhood.

This function can process the whole image or a region of the image.

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 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Minimum Function - Before

Minimum Function - After

View additional platform support for this Minimum function.

Required DLLs and Libraries

• LTDIS
• LTFIL
• LTIMGCOR
• 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.

See Also

Functions

• LBitmap::Fragment
• LBitmap::HighPassFilter
• LBitmap::UnsharpMask
• LBitmap::Sharpen
• LBitmap::Posterize
• LBitmap::Mosaic
• LBitmap::BinaryFilter
• LBitmap::AddNoise
• LBitmap::MedianFilter
• LBitmap::IntensityDetect
• LBitmap::SpatialFilter
• LBitmap::AverageFilter
• LBitmap::MaxFilter
• LBitmap::Emboss
• LBitmap::Oilify
• LBitmap::Solarize
• LBitmap::WindowLevelExt
• LBitmap::WindowLevel
• LDialogImageEffect::DoModalMinFilter
• Class Members

Topics

• Raster Image Functions: Filtering Images
• Removing Noise
• Raster Image Functions: Removing Noise

Example

L_INT LBitmap__MinFilterExample(LBitmap & Bitmap, L_TCHAR * szFileName) { L_INT nRet; nRet =Bitmap.Load(szFileName); if(nRet !=SUCCESS) return nRet; nRet =Bitmap.MinFilter(); if(nRet !=SUCCESS) return nRet; return SUCCESS; }

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