Fig. 1. Difference between alphabet and Hangul detection (a) Alphabet detection (b) Hangul detection
Fig. 2 The six structures of Korean characters IC and FC are the initial consonant and final consonant, respectively. VV and HV mean the vertical vowel and horizontal vowel, respectively
Fig. 3. The algorithm of the proposed method
Fig. 4. An example of obtaining a binary image using DoG filtered results for a Natural image (a) Original image (b) DoG filter applied image (c) Binarization applied image
Fig. 5. Horizontal / Vertical Cumulative Histogram (a) Binarization image (b) Horizontal histogram labeling image (c) Vertical histogram labeling image
Fig. 6. Vertical histogram labeling process (a) Original image (b) Vertical histogram labeling image (c) Vertical histogram labeling result image
Fig. 7. Consonant, vowel combination method
Fig. 8. Consonant, vowel combination process (a) Vertical histogram labeling result (b) Consonant and vowel centering
Fig. 9. Experimental image
Fig. 10. Image of experiment result ① (a) Original image (b) MSER detection result (c) Cumulative histogram detection result (d) Proposed method
Fig. 11. Image of experiment result ② (a) Original image (b) MSER detection result (c) Cumulative histogram detection result (d) Proposed method
Fig. 13. Comparison of experiment results ⓛ (a) Original image (b) K-means detection (c) MSER detection (d) Proposed method
Fig. 13. Comparison of experiment results ② (a) Original image (b) K-means detection (c) MSER detection (d) Proposed method
Fig. 15. Comparison of experiment results ③ (a) Original image (b) K-means detection (c) MSER detection (d) Proposed method
Fig. 16. Comparison of experiment results ④ (a) Original image (b) K-means detection (c) MSER detection (d) Proposed method
Fig. 17. Detection failure image ⑤
Fig. 12. Image of experiment result ③ (a) Original image (b) MSER detection result (c) Cumulative histogram detection result (d) Proposed method
Table 1. Hangeul detection comparison table
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