Automated Degradation Diagnosis in Character Recognition System Subject to Camera Vibration

Algorithm 2

Degraded character recognition procedure.

Input: the input character image 𝐼_𝑖

Output: character category 𝜔_𝑖

Step  1. For the input character image 𝐼_𝑖, extract the gray distribution feature

   to diagnose 𝐼_𝑖 and obtain disk-blurring level 𝐿^𝑑_𝑖;

Step  2. If 𝐿^𝑑_𝑖=2, extract the edge gray distribution feature to diagnose 𝐼_𝑖

   and obtain motion-blurring diagnosis result 𝐿^𝑚_𝑖. Set 𝐿_𝑖=𝐿^𝑚_𝑖.

   Otherwise, update 𝐿_𝑖=𝐿^𝑑_𝑖.

Step  3. For the input character image 𝐼_𝑖, extract the string code 𝐶_𝑖.

Step  4. According to the blurring level 𝐿_𝑖 of 𝐼_𝑖,

   acquire character category 𝜔_𝑖 by adaptive classification weights 𝑊

   to adaptively adjust every sub-model’s action.