Image Enhancement in the Spatial Domainpkalra/csl783/week-2-2015.pdfImage Enhancement in the Spatial...

Image Enhancement in the Spatial Domain

Gray Level Transformation Functions

Power Function

Power Function: Example

Power Function: Gamma Correction

Histogram

Histogram: Examples

Histogram Equalization

52 1 52 1 55 3 55 4 58 2 58 6 59 3 59 9 60 1 60 10 61 4 61 14 . . . 144 1 144 63 154 1 154 64

Histogram Equalization : Examples

Histogram Equalization: Examples

Histogram Specification

Histogram Equalization: Local Enhancement

Image Subtraction Image Addition

Spatial Filtering

Spatial Filtering: Neighborhood Averaging

Median Filter

Median Filter: Example

Sharpening Filter

Highboost Filter

Highboost Filter: Example

Gradient Filter

Gradient Filter: Example

Laplacian Filter

Laplacian Filter: Example

Halftoning

Original Gray Scale Image

Halftoning Thresholding

Halftoning

Random Modulation

Halftoning

4-cell area method

Halftoning

Floyed Steinberg Method

Image Enhancement in the Spatial Domainpkalra/csl783/week-2-2015.pdfImage Enhancement in the Spatial...

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