发明名称 |
METHODS, APPARATUS, PROGRAM AND MEDIA FOR EDGE DETECTION TECHNIQUE HAVING IMPROVED FEATURE VISIBILITY |
摘要 |
A method for determining edge features of an image comprising filtering at least a portion of the image to attenuate high frequency signals of the image to an extent greater than low frequency signals of the image. Performing a one-dimensional search in a two different horizontal directions relative to a particular pixel of the image to determine horizontal direction local maximums. Calculating a horizontal gradient based upon the horizontal direction local maximums. Performing a one-dimensional search in a two vertical horizontal directions relative to a particular pixel of the image to determine vertical direction local maximums. Calculating a vertical gradient based upon the vertical direction local maximums. Calculating a gradient for the particular pixel based upon the horizontal gradient and the vertical gradient. |
申请公布号 |
WO2011145436(A1) |
申请公布日期 |
2011.11.24 |
申请号 |
WO2011JP59999 |
申请日期 |
2011.04.19 |
申请人 |
SHARP KABUSHIKI KAISHA;XU, XINYU |
发明人 |
XU, XINYU |
分类号 |
G06T7/60 |
主分类号 |
G06T7/60 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|