Removes low frequency details in a bitmap, resulting in a sharpened image.
L_INT LBitmap::HighPassFilter(uRadius, uOpacity, uFlags = 0)
Value greater than 0 that indicates the radius of the neighborhood on which the filter is applied, in pixels.
Value that represents the intensity of the effect. The valid range is from 0 to 100. At 100, only the object outlines remain.
Reserved for future use. Must be 0.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
This filter removes low-frequency detail in the bitmap. The effect is opposite to that of the Gaussian Blur filter (LBitmap::GaussianFilter).
To increase the thickness of the edges, increase the value of uRadius. Usually a low value for uRadius is better.
Unlike the LBitmap::UnsharpMask function, when using this function image noise is not increased.
If the bitmap has a region, the effect will be applied on the region only.
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.
To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.
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.
High Pass Function - Before
High Pass Function - After
View additional platform support for this High Pass function.
nRet =LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("sample5.cmp")), 0,ORDER_BGR);
nRet =LeadBitmap.HighPassFilter(10, 100);
Medical Web Viewer .NET
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