An Improved Adaptive Noise Reduction for Secured CAPTCHA.
Anjali Avinash ChandavaleAshok M. SapkalPublished in: ICETET (2011)
Keyphrases
- noise reduction
- hearing aids
- signal to noise ratio
- noise cancellation
- edge preserving
- edge detection
- noise level
- median filter
- noisy environments
- noise removal
- speckle noise
- edge enhancement
- noise filtering
- speech enhancement
- adaptive algorithms
- wiener filter
- multiresolution
- information security
- noise detection
- impulsive noise
- multiscale
- adaptive filtering
- bilateral filter
- multiplicative noise
- natural images
- language model
- input output