image_processing_fall05

image_processing_fall05 - Normalization is needed. Original...

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September 6, 2005 BIOM 426 1 Image Processing: Filtering Instructor: Natalia Schmid
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September 6, 2005 BIOM 426 2 Low Pass Filtering • Masks are composed of positive entries. • Normalization is needed - modulo(256) gray scale operations. Original Image Filtered Using 3x3 Mask Filtered Using 7x7 Mask Matlab Function: filter2
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September 6, 2005 BIOM 426 3 Fourier Domain Magnitude of Fourier Transformed Original Image Transformed Blurred Image Mask of Size 7x7 Matlab: fft2; fftshift; abs; mesh
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September 6, 2005 BIOM 426 4 Histograms of Gray Levels Histogram of the Original Image Filtered Image, Mask 7x7 Matlab: reshape, hist
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September 6, 2005 BIOM 426 5 High Pass Filtering • Positive and negative pixel values – sum to zero.
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Unformatted text preview: Normalization is needed. Original Image Filtered Using 7x7 Mask September 6, 2005 BIOM 426 6 Frequency Domain Magnitude of Fourier Transformed Original Image Transformed Sharpened Image Mask of Size 7x7 September 6, 2005 BIOM 426 7 Prewitt Operators Original Image Sharpening in X-Direction Sharpening in Y-Direction-1 1 September 6, 2005 BIOM 426 8 Sobel Operators Original Image Sharpening in X-Direction Sharpening in Y-Direction-1 1 2-2 Provide both differencing and smoothing....
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This note was uploaded on 03/04/2012 for the course BIOM 426 taught by Professor Staff during the Fall '08 term at WVU.

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image_processing_fall05 - Normalization is needed. Original...

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