OBJECTIVES 1. Define “point operation” 2. Overview of applications ...

More documents

Recommendations

Info

D B = f(D A) D B Equation for Output Histogram 255 D B + ∆∆∆∆D B ∆∆∆∆D B D B D A 0 H A(D A) H B(D B) ∆∆∆∆D A 12 D A 255 D A + ∆∆∆∆D A D A 0
Summary • Point operations transform the gray scale <strong>of</strong> an image • Mathematically specified by the grayscale transformation (GST) f (D) that expresses the mapping between input and output gray levels • Useful for contrast enhancement, photometric & display calibration, thresholding, clipping • Given the histogram <strong>of</strong> the input, HA(DA), and the GST f (DA), can predict output histogram using the equation: ( ) H D f B B where ′ = df dD = A ( −1( ) ) − 1( ) H f D A B ( ) B f ′ f D 13
Page 1 and 2: Point Operations OBJECTIVES 1. Defi
Page 3 and 4: Mathematical Definition of Point Op
Page 5 and 6: Overview of Applications Contrast E
Page 7 and 8: Overview of Applications • Displa
Page 9 and 10: Linear Point Operation b affects br
Page 11: Equation for Output Histogram GIVEN

OBJECTIVES 1. Define “point operation” 2. Overview of applications ...

Create successful ePaper yourself

Delete template?

Save as template?