Two dimensional image recording and reproducing scheme using similarity distribution
First Claim
1. A method for detecting a position of a prescribed pattern in an information recording image that contains the prescribed pattern, comprising the steps of:
- (a) detecting a rough position of the prescribed pattern in the information recording image in units of pixel size; and
(b) detecting a detailed position of the prescribed pattern in the information recording image in units less than the pixel size, according to the rough position detected by the step (a) and a center of gravity of a distribution of similarities between regions in the information recording image and a reference image of the prescribed pattern.
1 Assignment
0 Petitions
Accused Products
Abstract
In a two dimensional image recording and reproducing scheme, a position of a prescribed pattern in an information recording image that contains the prescribed pattern is detected by detecting a rough position of the prescribed pattern in the information recording image in units of pixel size, and then detecting a detailed position of the prescribed pattern in the information recording image in units less than the pixel size, according to the rough position and a center of gravity of a distribution of similarities between regions in the information recording image and a reference image of the prescribed pattern.
-
Citations
13 Claims
-
1. A method for detecting a position of a prescribed pattern in an information recording image that contains the prescribed pattern, comprising the steps of:
-
(a) detecting a rough position of the prescribed pattern in the information recording image in units of pixel size; and (b) detecting a detailed position of the prescribed pattern in the information recording image in units less than the pixel size, according to the rough position detected by the step (a) and a center of gravity of a distribution of similarities between regions in the information recording image and a reference image of the prescribed pattern. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An apparatus for detecting a position of a prescribed pattern in an information recording image that contains the prescribed pattern, comprising:
-
a rough position detection unit configured to detect a rough position of the prescribed pattern in the information recording image in units of pixel size; and a detailed position detection unit configured to detect a detailed position of the prescribed pattern in the information recording image in units less than the pixel size, according to the rough position detected by the rough position detection unit and a center of gravity of a distribution of similarities between regions in the information recording image and a reference image of the prescribed pattern. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A computer usable medium having computer readable program codes embodied therein for causing a computer to function as an apparatus for detecting a position of a prescribed pattern in an information recording image that contains the prescribed pattern, the computer readable program codes include:
-
a first computer readable program code for causing said computer to detect a rough position of the prescribed pattern in the information recording image in units of pixel size; and a second readable program code for causing said computer to detect a detailed position of the prescribed pattern in the information recording image in units less than the pixel size, according to the rough position detected by the rough position detection unit and a center of gravity of a distribution of similarities between regions in the information recording image and a reference image of the prescribed pattern.
-
Specification