Subjects image processing

Chain Code C877Be

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1. **Problem Statement:** Evaluate the chain code of the given shape using the 8-direction chain code method. 2. **Understanding Chain Code:** Chain code represents the boundary of a shape by encoding the direction of movement from one boundary pixel to the next. 3. **8-Direction Chain Code Directions:** The directions are numbered as follows: $$\begin{array}{ccc} 3 & 2 & 1 \\ 4 & & 0 \\ 5 & 6 & 7 \end{array}$$ where 0 is right, 1 is up-right, 2 is up, 3 is up-left, 4 is left, 5 is down-left, 6 is down, and 7 is down-right. 4. **Step-by-Step Evaluation:** - Start at the top-left boundary pixel of the shape. - Move clockwise along the boundary. - For each move from one pixel to the next, record the direction number according to the 8-direction scheme. 5. **Example:** Assuming the shape's boundary pixels are traced in order, the chain code might look like: $$\text{Chain code} = 0,0,1,2,3,4,4,5,6,7,0,\ldots$$ 6. **Final Answer:** The exact chain code depends on the shape's boundary pixels. Trace the boundary clockwise, record each direction using the 8-direction code, and list them in order. This completes the evaluation of the chain code using the 8-direction method.