Image detection device
First Claim
1. An image detection device for detecting a predetermined image area from an image data that is inputted in series for each pixel of an image made up of a plurality of pixels arranged in a lateral direction and a vertical direction like a matrix, the device comprising:
- a size condition memory portion for storing a size condition of the image area to be detected;
a lateral direction edge detection portion for detecting an edge by comparing pixel data of neighboring pixels on one line in the lateral direction of the image;
an edge address memory portion for storing an address of the detected edge;
a vertical direction detection portion for regarding each pixel of the address stored in the edge address memory portion as a noted pixel, comparing a pixel data of the noted pixel with that of a pixel on the next line neighboring the noted pixel and detecting a pixel having a difference of the pixel data within a predetermined range;
an area address memory portion for storing an address of the detected pixel as an area edge address when it is detected that the difference of the pixel data is within a predetermined range by the vertical direction detection portion; and
an area extraction portion for extracting an area that satisfies the size condition stored in the size condition memory portion from an area address stored in the area address memory portion.
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Accused Products
Abstract
A device for detecting an image area from an image data that is inputted in series for each pixel is provided. The device includes a lateral direction edge detection portion for comparing pixel data of neighboring pixels in the lateral direction on one line of the image, a vertical direction detection portion for regarding pixels of edge addresses as a noted pixel and comparing pixel data of the noted pixel with that of a pixel one the next line neighboring the noted pixel so as to detect a pixel having a difference between the data within a predetermined range, an area address memory portion for storing an address of the detected pixel when the vertical direction detection portion detected that the difference is within a predetermined range, and an area extraction portion for extracting an area that satisfies a size condition stored in the area address memory portion.
13 Citations
12 Claims
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1. An image detection device for detecting a predetermined image area from an image data that is inputted in series for each pixel of an image made up of a plurality of pixels arranged in a lateral direction and a vertical direction like a matrix, the device comprising:
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a size condition memory portion for storing a size condition of the image area to be detected;
a lateral direction edge detection portion for detecting an edge by comparing pixel data of neighboring pixels on one line in the lateral direction of the image;
an edge address memory portion for storing an address of the detected edge;
a vertical direction detection portion for regarding each pixel of the address stored in the edge address memory portion as a noted pixel, comparing a pixel data of the noted pixel with that of a pixel on the next line neighboring the noted pixel and detecting a pixel having a difference of the pixel data within a predetermined range;
an area address memory portion for storing an address of the detected pixel as an area edge address when it is detected that the difference of the pixel data is within a predetermined range by the vertical direction detection portion; and
an area extraction portion for extracting an area that satisfies the size condition stored in the size condition memory portion from an area address stored in the area address memory portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image detection device for detecting a predetermined image area from an image data that is inputted in series for each pixel of an image made up of a plurality of pixels arranged in a lateral direction and a vertical direction like a matrix, the device comprising:
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a size condition memory portion for storing a size condition of the image area to be detected;
a buffer memory for storing a pixel data for one pixel of the inputted image data;
a line memory for delaying the inputted pixel data by one line;
a temporary memory for storing a pixel data of a pixel that is delayed by one line from the pixel stored in the buffer memory when it is delayed by the line memory;
a lateral direction edge detection portion for detecting an edge in the lateral direction by comparing the pixel data stored in the buffer memory with a pixel data of a pixel neighboring in the lateral direction;
an edge address memory portion for storing an address of the detected edge;
a vertical direction detection portion for comparing the pixel data stored in the buffer memory with the pixel data stored in the temporary memory, and detecting a pixel having a difference between the pixel data that is within a predetermined range;
an area address memory portion for storing an address of the detected pixel as an area edge address when it is detected that the difference of the pixel data is within the predetermined range by the vertical direction detection portion; and
an area extraction portion for extracting an area that satisfies the size condition stored in the size condition memory portion from an area address stored in the area address memory portion. - View Dependent Claims (12)
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Specification