§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4533959A Expired / Lapsed US ⏱️ 0.0 years remaining

Picture processing apparatus

Assignee: Ricoh Co Ltd
•
Filing: 1982-11-18
•
Granted: 1985-08-06
•
Expires: 2002-11-18
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A picture processing apparatus comprising (1) a picture memory for storing a quantized picture of an original, which original includes skew detection marks, (2) a skew detector for detecting the skew of the quantized picture by the skew detection marks on the original, (3) a frame detector for detecting the frame in which the picture on the original is enclosed, (4) a picture-processing area designation apparatus for designating the portion of the picture to be processed and edited in accordance with the frame detection information obtained from the frame detector, (5) a skew corrector for reproducing the quantized picture within the area designated by the picture-processing area designation apparatus, with correction of skew (if any), from the picture memory, and (6) a skew mode selection switch for the skew corrector for selecting whether or not the aforementioned skew correction shall be performed.

Inventors

  • 👤 Akira Sakurai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 01:34
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/60; G06T3/608; H; H04; H04N; H04N1/00; H04N1/387; H04N1/3877; H04N1/3878

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 115 words
A picture processing apparatus comprising; a picture memory for storing a quantized picture of an original, which original includes skew detection marks; a skew detector for detecting the skew of the quantized picture by the skew detection marks on the original; a frame detector for detecting the frame in which the picture on the original is enclosed; a picture-processing area designation apparatus for designating the portion of the picture to be processed and edited in accordance with the frame detection information obtained from said frame detector; and a skew corrector for reproducing the quantized picture within the area designated by said picture-processing area designation apparatus, with correction of skew, if any, from said picture memory.
Claim 2
Dependent Claim 115 words
A picture processing apparatus comprising; a picture memory for storing a quantized picture of an original, which original includes skew detection marks; a skew detector for detecting the skew of the quantized picture by the skew detection marks on the original; a frame detector for detecting the frame in which the picture on the original is enclosed; a picture-processing area designation apparatus for designating the portion of the picture to be processed and edited in accordance with the frame detection information obtained from said frame detector; and a skew corrector for reproducing the quantized picture within the area designated by said picture-processing area designation apparatus, with correction of skew, if any, from said picture memory.
Claim 3
Dependent Claim 31 words
A picture processing apparatus as claimed in claim 1, further comprising a skew mode selection switch for said skew corrector for selecting whether or not said skew correction shall be performed.
Claim 4
Dependent Claim 31 words
A picture processing apparatus as claimed in claim 1, wherein said frame detector comprises a line segment sampling circuit, a line segment integration circuit, and a line segment length determination circuit.
Claim 5
Dependent Claim 63 words
A picture processing apparatus as claimed in claim 1, wherein said skew detection marks comprise at least two marks with reference points M 1 (x 1 , y 1 ) and M 2 (x 2 , y 2 ), said marks being solid and triangular in shape, and said skew detector comprising an M 1 address counter and an M 2 address counter.

References Cited (Backward Citations)

US3337766A Cited
US3830975A Cited
US3885229A Cited
US4393410A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-08-05 1989-02-04 1989-08-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-08-05 1993-02-04 1993-08-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-08-05 1997-02-04 1997-08-06 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag