US 7,443,428 B2Granted

Image processing device

AssigneeHoya Corporation

InventorYasuhiro Yamamoto

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Abstract

An image is divided into first and second images, whose pixel data are processed using different processors simultaneously. The pixel data of the first and second image is stored in a first memory field and a second memory field including top and lower fields. The processed data produced from the pixel data of the first image (the first processed data) is stored in the first memory field. The processed data produced from the top line of the second image (the partial processed data) is temporarily stored in a temporary memory field. The processed data produced from the other lines of the second image except for the top line (the second processed data) is stored in the lower field. The partial processed data which is temporarily stored in a temporary memory field is stored in the upper field after the second image processed data has finished being stored.

Claims11

Dependent claims

An image processing device that divides an original image into at least a first image which is located at an upper side and a second image, which is located at a lower side with respect to said first image by using a horizontal line, said image processing device comprising:

a first memory field for storing pixel data forming each line of said first image,
a second memory field for storing pixel data forming each line of said second image, that comprises a top memory field for storing pixel data of the top line of said second image, and a lower memory field for storing pixel data of other lines of said second image other than said top line, said first and second memory fields being formed in a common memory, an address of said first memory field at which pixel data of the lowest line of said first image is stored, being adjoined to an address of said second memory field at which pixel data of the highest line of said second image is stored,
a temporary memory field,
a first image processor that processes pixel data of said first image from the highest line to the lowest line successively so as to produce first image processed data, said first image processed data being successively stored in said first memory field in each line, and
a second image processor that processes pixel data of said second image from the highest line to the lowest line successively so as to produce partial image processed data which is obtained by image processing pixel data of said top line of said second image, and second image processed data which is obtained by image processing the pixel data of said other lines of said second image, said first and second image processors processing said first and second images simultaneously, said partial image processed data being temporarily stored in said temporary memory field, and said second image processed data being successively stored in said lower memory field in each line;
wherein said partial image processed data which is stored in said temporary memory field is stored in said upper memory field after said second image processed data has finished being stored in said lower memory field.

3 more elements

An image processing method for processing an original image, comprising the steps of:

dividing said original image into at least a first image which is located at an upper side and a second image which is located at a lower side with respect to said first image by a horizontal line,
storing pixel data forming each line of said first image in a first memory field,
storing pixel data forming each line of said second image in a second memory field, that comprises a top memory field for storing pixel data of the top line of said second image, and a lower memory field for storing pixel data for the other lines of said second image other than said top line, said first and second memory fields being formed in a common memory, an address of said first memory field at which pixel data of the lowest line of said first image is stored being adjoined to an address of said second memory field at which pixel data of the highest line of said second image is stored,
processing pixel data of said first image from the highest line to the lowest line successively so as to produce first image processed data,
storing said first image processed data stored in said first memory field in each line successively,
processing pixel data of said second image from the highest line to the lowest line successively, and independently of processing pixel data of said first image, so as to produce partial image processed data which is obtained by image processing pixel data of said top line of said second image and second image processed data which is obtained by image processing pixel data of said other lines of said second image, whereby said first and second images are processed simultaneously,
temporarily storing said partial image processed data in a temporary memory field,
storing a second image processed data in said lower memory field in each line successively, and
storing said partial image processed data which is stored in said temporary memory field in said upper memory field after finishing storing said second image processed data in said lower memory field.

6 more elements

Dependencies are inferred from the claim text.