Study of Hollow Letter CAPTCHAs Recognition Technology Based on Color Filling Algorithm.
Huishuang ShaoYurong XiaKai MengChanghao PiaoPublished in: J. Inf. Process. Syst. (2023)
Keyphrases
- recognition algorithm
- experimental study
- cost function
- computational complexity
- matching algorithm
- preprocessing
- search space
- detection algorithm
- np hard
- optimization algorithm
- worst case
- theoretical analysis
- similarity measure
- optimal solution
- color space
- dynamic programming
- k means
- genetic algorithm
- handwritten digits
- particle swarm optimization
- feature extraction
- learning algorithm