Question

Apply Block Truncation coding for the image block shown below, 202 233 240 202 240 222...

Apply Block Truncation coding for the image block shown below,

202 233 240 202

240 222 222 240

211 236 240 202

236 211 233 211

Engineering   Computer-Science   
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Homework Answers

Answer #1

In Block Truncation Coding,

is mean, which is equal to 223.81

The encoded image is

0 1 1 0

1 0 0 1

0 1 1 0

1 0 1 0

To, reconstruct the image we use,

is standard deviation = 15.14

m is total number of pixels in the block = 16

q is number of pixels greater than the mean = 8

a = 208.67

b = 238.95

The decoded image will be

208 238 238 208

238 208 208 238

208 238 238 208

238 208 238 208

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