Image detecting method, image detecting system, program, and recording medium for image detection
First Claim
1. An image detecting method comprising the steps of:
- a) searching for a pattern satisfying a predetermined commencement requirement by scanning an input image;
b) using the pattern as a starting point, with referring to a dictionary storing therein distances between the center line and an edge of a detection target semicircle, determining for each of a predetermined number of main scan lines along a sub-scan direction whether or not a predetermined edge pattern occurs within a respective range of the distance of said dictionary; and
c) determining a detection of the semicircle when the number of error main scan lines on which the predetermined edge pattern does not occur within the respective range of the distance of said dictionary is less than a predetermined threshold.
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Abstract
An image detecting method comprises the steps of: a) searching for a pattern satisfying a predetermined commencement requirement by scanning an input image; b) using the pattern as a starting point, with referring to a dictionary storing therein distances between the center line and an edge of a detection target semicircle, determining for each of a predetermined number of main scan lines along a sub-scan direction whether or not a predetermined edge pattern occurs within a respective range of the distance of the dictionary; and c) determining a detection of the semicircle when the number of error lines on which the predetermined edge pattern does not occur within the respective range of the distance of the dictionary is less than a predetermined threshold.
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Citations
12 Claims
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1. An image detecting method comprising the steps of:
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a) searching for a pattern satisfying a predetermined commencement requirement by scanning an input image;
b) using the pattern as a starting point, with referring to a dictionary storing therein distances between the center line and an edge of a detection target semicircle, determining for each of a predetermined number of main scan lines along a sub-scan direction whether or not a predetermined edge pattern occurs within a respective range of the distance of said dictionary; and
c) determining a detection of the semicircle when the number of error main scan lines on which the predetermined edge pattern does not occur within the respective range of the distance of said dictionary is less than a predetermined threshold. - View Dependent Claims (2, 3)
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4. An image detecting system comprising:
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a part searching for a pattern satisfying a predetermined commencement requirement by scanning an input image;
a part using the pattern as a starting point, with referring to a dictionary storing therein distances between the center line and an edge of a detection target semicircle, determining for each of a predetermined number of main scan lines along a sub-scan direction whether or not a predetermined edge pattern occurs within a respective range of the distance of said dictionary; and
a part determining a detection of the semicircle when the number of error main scan lines on which the predetermined edge pattern does not occur within the respective range of the distance of said dictionary is less than a predetermined threshold. - View Dependent Claims (5, 6)
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7. A program, read by a computer, which thus executes the program so as to perform a process of detecting an predetermined figure, said program comprising:
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first program code means for searching for a pattern satisfying a predetermined commencement requirement by scanning an input image;
second program code means for using the pattern as a starting point, with referring to a dictionary storing therein distances between the center line and an edge of a detection-target semicircle, determining for each of a predetermined number of main scan lines along a sub-scan direction whether or not a predetermined edge pattern occurs within a respective range of the distance of said dictionary; and
third program code means for determining a detection of the semicircle when the number of error lines on which the predetermined edge pattern does not occur within the respective range of the distance of said dictionary is less than a predetermined threshold. - View Dependent Claims (8, 9)
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10. A computer-readable recording medium storing therein a program, read by a computer, which thus executes the program so as to perform a process of detecting an predetermined figure, said program comprising:
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first program code means for searching for a pattern satisfying a predetermined commencement requirement by scanning an input image;
second program code means for using the pattern as a starting point, with referring to a dictionary storing therein distances between the center line and an edge of a detection-target semicircle, determining for each of a predetermined number of main scan lines along a sub-scan direction whether or not a predetermined edge pattern occurs within a respective range of the distance of said dictionary; and
third program code means for determining a detection of the semicircle when the number of error main scan lines on which the predetermined edge pattern does not occur within the respective range of the distance of said dictionary is less than a predetermined threshold. - View Dependent Claims (11, 12)
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Specification