Reduction image converting device

Details Reduction image converting device Reduction image converting device

1993-12-15

1995-06-27

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358454, H04N 140

Patent

active

054284619

ABSTRACT:
An image data processing-device for converting first image data into second image data by reducing the first image data horizontally at a reduction rate of 1/K.sub.x while reducing the first image data vertically at a reduction rate of 1/K.sub.y, in which integer parts of K.sub.x and K.sub.y are A.sub.x and A.sub.y respectively while floating-point parts of K.sub.x and K.sub.y are .alpha..sub.x and .alpha..sub.y respectively. Such image data processing device comprises a first memory for holding said first image data, a second memory having an area where said gray-level pixel data will be stored, an area setting unit for setting a rectangle-shaped area of the first image data which corresponds to each pixel of the second image data, the rectangle-shaped area having L.sub.y pixel lines and L.sub.x pixel columns, in which L.sub.y is A.sub.y +1 at a possibility of .alpha..sub.y or A.sub.y at a possibility of 1-.alpha..sub.y while L.sub.x is A.sub.x +1 at a possibility of 60 .sub.x or A.sub.x at a possibility of 1-.alpha..sub.x, an area readout unit for reading out a pixel level of every pixel held in each rectangle-shaped area, and outputting the pixel levels, an operation unit for integrating a pixel level of each rectangle-shaped area and obtaining gray-level pixel data by applying a predetermined operation to the integration result, and a writing unit for writing the gray-level pixel data into the second memory, the gray-level pixel data corresponding to the rectangle-shaped area of the first memory.

REFERENCES:
patent: 4827353 (1989-05-01), Ehlers et al.
patent: 4893258 (1990-01-01), Sakuragi
patent: 4920501 (1990-04-01), Sullivan et al.
patent: 4937677 (1990-06-01), van Dorsselaer
patent: 5041920 (1991-08-01), Hayes et al.
patent: 5050000 (1991-09-01), Ng
patent: 5309253 (1994-05-01), Ariga et al.
patent: 5317417 (1994-05-01), Yamamura et al.

Affiliated with

Also associated with

Rating

Reduction image converting device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduction image converting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction image converting device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-291133