Digital Image Processing

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Presentation transcript:

Digital Image Processing 11/16/2018

Digital Image Processing Fourier Transforms: Smoothing & Sharpening frequency domain filters 11/16/2018

Smoothing Frequency-domain filters: Ideal Lowpass filter 11/16/2018

image power circles 11/16/2018

Result of ILPF 11/16/2018

Why ringing effect 11/16/2018

Ringing Effect 11/16/2018

Butterworth low pass filter 11/16/2018

Butterworth Lowpass Filter: BLPF 11/16/2018

Example 11/16/2018

Spatial representation of BLPFs 11/16/2018

Gaussian low pass filters 11/16/2018

Gaussian Lowpass Filter: GLPF 11/16/2018

Example 11/16/2018

Gaussian low pass filters Example 11/16/2018

Example 11/16/2018

Example 11/16/2018

Sharpening in FD Ideal highpass filter Butterworth highpass filter Gaussian highpass filter 11/16/2018

Example: result of IHPF 11/16/2018

Example: result of BHPF 11/16/2018

Example: result of GHPF 11/16/2018

Laplacian in frequency domain 11/16/2018

Laplacian in the Frequency domain 11/16/2018

Example: Laplacian filtered image 11/16/2018

Unsharp masking, high boost filtering 11/16/2018

Example: high-boost filter 11/16/2018

Examples 11/16/2018

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