55 search results - page 1 / 11 » A Captcha Based on the Human Visual Systems Masking Characte... |
ICMCS
2006
IEEE
14 years 5 months ago
2006
IEEE
In this paper, a CAPTCHA is presented based on the masking characteristics of the Human Visual System (HVS). Knowing that noise can be masked by high activity regions and showing ...
IWDW
2005
Springer
14 years 4 months ago
2005
Springer
Image-Adaptive watermarking systems exploit visual models to adapt the watermark to local properties of the host image. This leads to a watermark power enhancement, hence an improv...
CAIP
2007
Springer
14 years 5 months ago
2007
Springer
A novel approach towards a simplified, though still reliable human vision model based on the spatial masking properties of the human visual system (HVS) is presented. The model con...
ISCIS
2003
Springer
14 years 4 months ago
2003
Springer
Abstract. In this paper, we propose a new video watermarking algorithm based on the human visual system (HVS) properties to find effective locations in video sequences for robust ...
ICIP
2009
IEEE
13 years 9 months ago
2009
IEEE
One of the characteristics of the Human Visual System (HVS) is to model the sensitivity of the human eye at each coordinate location in the image. This paper explores the use of fu...