Advanced Techniques in Spelling Correction

Explore various methods such as edit distance, n-gram overlap, Jaccard coefficient, and context-sensitive spell correction for accurate document editing and word correction. Learn how these techniques help improve accuracy in language processing tasks.

• Spelling Correction
• Language Processing
• Edit Distance
• N-Gram Analysis
• Jaccard Coefficient

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1. SPELLING CORRECTION By Dr. huda abdulaali

2. SPELL CORRECTION

3. DOCUMENT CORRECTION

4. ISOLATED WORD CORRECTION

5. EDIT DISTANCE

6. EXAMPLE Find the edit distance to convert A b c d e f to a z c e d null null A Z C E d A 1 0 1 2 3 4 B 2 1 1 2 3 4 C 3 2 2 1 2 3 D 4 3 3 2 2 2 E 5 4 4 3 2 3 F 6 5 5 4 3 3 0 1 2 3 4 5

7. N-GRAM OVERLAP the n-grams in the query string as well as in the lexicon * use the n-gram index (recall wild-card search) to retrieve all lexicon terms matching any of the query n- grams

8. EXAMPLE WITH TRIGRAMS

9. ONE OPTION JACCARD COEFFICIENT

10. EXAMPLE A= { 7, 3, 2, 4, 1} B= { 4, 1, 9, 7, 5} find the Jc distance AU B { 1, 2, 3, 4, 7, 9} A B { 1, 4, 7} 3 / 7

11. CONTEXT-SENSITIVE SPELL CORRECTION

12. T Q