Title:
IMAGE REDUCING/MAGNIFYING APPARATUS
Document Type and Number:
Japanese Patent JP3877054
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an image reducing/magnifying apparatus that can save the capacity of a memory to read pixel data of an object reduction range in the unit of 8×8 pixels without the need for using a line FIFO.
SOLUTION: The image reducing/magnifying apparatus with a magnifying function of reducing image data is provided with: a first memory 1 that stores block data in the unit of 8×8 pixels, an adder 3 to calculate a total sum of the image data within the reduction object range; a sum storage register 4 that temporarily stores the sum of pixels in each of mainscanning and subscanning; a divider 5 to calculate an average of total sum of the image data within the reduction object range; a first address generator 6 to store one pixel to be calculated to a prescribed position; a summing intermediate storage timing generator 7; a divider discrimination device 8, and a second memory 9 to store 8×8 pixel data after reduction.
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Inventors:
Takashi Otsuki
Application Number:
JP2001360008A
Publication Date:
February 07, 2007
Filing Date:
November 26, 2001
Export Citation:
Assignee:
株式会社リコー
International Classes:
B41J5/30; H04N1/393; G06T3/40; H04N5/262; (IPC1-7): H04N1/393; B41J5/30; G06T3/40; H04N5/262
Domestic Patent References:
| JP9307745A | ||||
| JP5046753A | ||||
| JP2001257872A | ||||
| JP8331373A |
Attorney, Agent or Firm:
Takao Maruyama
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