Incremental printing of symbolic information – Thermal marking apparatus or processes – Multicolor
Patent
1994-04-01
1996-06-18
Tran, Huan H.
Incremental printing of symbolic information
Thermal marking apparatus or processes
Multicolor
347175, 358525, H04N 701, H04N 591, B41J 2325
Patent
active
055282741
ABSTRACT:
A color video thermal printing method for printing a full-color frame image on the basis of a color video signal of a full-color field image by interpolation. Interpolation for at least one of three primary colors is made as follows: sums A1, A2 and A3 of image data D1 and D4; D2 and D5; and D3 and D6 of respectively two pixels P1 and P4; P2 and P5; and P3 and P6 are calculated, assuming the pixels P1, P2 and P3 are aligned in this order in a line of the field image, and the pixels P4, P5 and P6 are aligned in this order in an adjacent line of the field image, wherein the pixels P2 and P5 are aligned in the vertical direction with a pixel Px to be interpolated, and are disposed on opposite sides of the pixel Px. If A1<A2<A3 or A1>A2>A3, differences S1=.vertline.D1-D6.vertline., S2=.vertline.D2-D5.vertline., and S3=.vertline.D3-D4.vertline. are calculated. If S1<S2<S3, an average value (D1+D6)/2 is used as interpolation data. If S1>S2>S3, an average value (D3+D4)/2 is used as interpolation data. In other cases, an average value (D2+D5)/2 is used as interpolation data.
REFERENCES:
patent: 5232294 (1993-08-01), Inui
Fuji Photo Film Co. , Ltd.
Tran Huan H.
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