1. BASIC IMAGE PROCESSING OPERATIONS FOR COMPUTER VISION
September 15, 1998

2. GAMMA CORRECTION g=1 g=2.0 g=0.5 Itransformed = I 1 g Transformed
Original Intensity
Transformed
Intensity
255
Itransformed = I 1 g
g=2.0
g=0.5
September 15, 1998

3. GAMMA CORRECTION Gamma=0.5 Gamma=2.0 Gamma=10.0 Original Image
September 15, 1998

4. THRESHOLDING AN IMAGE
For each pixel if (I > grey-level-threshold) then pixel gets Label1 else pixel gets Label2
GLT=200
GLT=50
GLT=100
September 15, 1998

5. DISCRETE CONVOLUTION I = T1 x I1 + T2 x I2 + T3 x I3
T1 T2 T3
Template
‘Kernel’
3x3
Template
T4 T5 T6
T7 T8 T9
I I2 I3
Image
I4 I I6
I I I9
I = T1 x I1 + T2 x I2 + T3 x I3
+ T4 x I4 + T5 x I5 + T6 x I6
+ T7 x I7 + T8 x I8 + T9 x I9
Local
Image
Neighborhood
September 15, 1998