Method for smoothing image

Details Method for smoothing image Method for smoothing image

1991-08-07

1995-04-04

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358298, 358296, 358401, 382 54, H04N 100

Patent

active

054042330

ABSTRACT:
A method for forming images composed of a matrix of dots in a printer, such as a laser printer or an LED printer, and a bit map display unit such as a CRT display, and more particularly a method for smoothing images by smoothing stairsteps included in the images to obtain a high resolution image. The method includes dividing a pixel into a plurality of subpixels along a vertical scanning line or a horizontal scanning line, and reversing a signal for a subpixel following a reversion signal to smooth the image as desired. The reversion signal may be provided by subjecting a specific pixel to a boolean operation, conjunction or disjunction, with the adjacent pixels next to the specific pixel. The reversion signal may also be provided by the steps of: generating, in advance, a set of four bordering data which represents the relationship of a specific pixel with bordering pixels, of which bordering data are generated by subjecting the specific pixel and the four bordering pixels to nonequivalent boolean operation respectively, detecting the location of the stairstep and recognizing the style of the stairstep referring to a relationship among the bordering data for the pixels located along the vertical or horizontal line, and measuring the length of the level pixels adjoining with the stairstep.

REFERENCES:
patent: 4355337 (1982-10-01), Sekigawa
patent: 4360883 (1982-11-01), Ejiri et al.
patent: 4437122 (1984-03-01), Walsh et al.
patent: 4486785 (1984-12-01), Lasher et al.
patent: 4544264 (1985-10-01), Bassetti et al.
patent: 4847641 (1989-07-01), Tung
patent: 5117294 (1992-05-01), Yano
patent: 5151794 (1992-09-01), Kumagai

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2383386