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US4965844A
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Method and system for image transformation
Assignee: Sony Corp
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Filing: 1986-03-31
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Granted: 1990-10-23
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Expires: 2006-03-31
Abstract
Abstract A method of transforming an input video image data onto a three-dimensional surface is disclosed which comprises the steps of defining the three-dimensional surface, providing mapping data for transforming the input video image data onto the surface, storing the input video image data in a first memory, transforming the input video image data stored in the first memory according to the mapping data so as to provide an output video image data, calculating first vectors representing, respectively, orientations taken by minute areas on the surface, calculating second vectors representing, respectively, directions from the minute areas toward a virtual light source disposed in a position, calculating weighting factors according to the first and second vectors, the weighting factors quantifying shading to be caused on the minutes areas by the virtual light source, and weighting the input video image data or the output video image data according to the weighting factors.
Inventors
- 👤 Masaaki Oka
- 👤 Yoshitaka Kurauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
G; G06; G06T; G06T17/00; G06T1/00; G06T1/0007; H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/2628
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
203 words
A method of transforming a two-dimensional input video image data onto a three-dimensional surface comprising the steps of: (A) defining said three-dimensional surface; (B) providing mapping data for transforming said two-dimensional input video image data onto said surface; (C) storing said two-dimensional input video image data in a first memory means; (D) transforming said two-dimensional input video image data stored in said first memory means according to said mapping data so as to provide a two-dimensional output video image data; (E) calculating first vectors respectively representing normal vectors of minute areas provided on said surface; (F) calculating second vectors respectively representing directions from said minute areas toward an imaginary light source disposed at an arbitrary position; (G) calculating values of an inner product of said first and said second vectors; (H) calculating weighting factors according to said values of said inner products of said first and said second vectors calculated in step (G), said weighting factors respectively respresenting shading on said minute areas caused by said imaginary light source; and (I) weighting a signal representative of said two-dimensional input video image data according to said weighting factors, whereby both luminescence and hue components of said signal are changed according to said weighting factors.
Claim 2
Independent Claim
203 words
A method of transforming a two-dimensional input video image data onto a three-dimensional surface comprising the steps of: (A) defining said three-dimensional surface; (B) providing mapping data for transforming said two-dimensional input video image data onto said surface; (C) storing said two-dimensional input video image data in a first memory means; (D) transforming said two-dimensional input video image data stored in said first memory means according to said mapping data so as to provide a two-dimensional output video image data; (E) calculating first vectors respectively representing normal vectors of minute areas provided on said surface; (F) calculating second vectors respectively representing directions from said minute areas toward an imaginary light source disposed at an arbitrary position; (G) calculating values of an inner product of said first and said second vectors; (H) calculating weighting factors according to said values of said inner products of said first and said second vectors calculated in step (G), said weighting factors respectively respresenting shading on said minute areas caused by said imaginary light source; and (I) weighting a signal representative of said two-dimensional input video image data according to said weighting factors, whereby both luminescence and hue components of said signal are changed according to said weighting factors.
Claim 3
Dependent Claim
31 words
A method of transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 1, further comprising a step of setting the position of said imaginary light source.
Claim 4
Dependent Claim
60 words
A method of transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 1, wherein said step (E) comprises the steps of (1) calculating normal vectors of said minute areas provided on said surface, (2) calculating front/back flags of said minute areas provided on said surfaces and (3) multiplying said normal vectors and said front/back flags.
Claim 5
Dependent Claim
32 words
A method of transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 1, further comprising a step of storing said weighting factors in a second memory means.
Claim 6
Independent Claim
194 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface comprising: (A) means for defining said three-dimensional surface; (B) means for providing mapping data for transforming said two-dimensional input video image data onto said surface; (C) first memory means for storing said two-dimensional input video image data; (D) means for transforming said two-dimensional input video image data stored in said first memory means according to said mapping data so as to output a two-dimensional video image data; (E) second memory means for storing weighting factors representing shading on said surface caused by an imaginary light source disposed at an arbitrary position, said weighting factors being provided by calculation according to first vectors respectively representing normal vectors of minute areas provided on said surface and second vectors respectively representing directions from said minute areas toward said imaginary light source and calculating an inner product of said first and second vectors; and (F) means for weighting a signal representative of said input video image data or said input video image data according to said weighting factors whereby both luminescence and hue components of said signal are changed according to said weighting factors.
Claim 7
Independent Claim
194 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface comprising: (A) means for defining said three-dimensional surface; (B) means for providing mapping data for transforming said two-dimensional input video image data onto said surface; (C) first memory means for storing said two-dimensional input video image data; (D) means for transforming said two-dimensional input video image data stored in said first memory means according to said mapping data so as to output a two-dimensional video image data; (E) second memory means for storing weighting factors representing shading on said surface caused by an imaginary light source disposed at an arbitrary position, said weighting factors being provided by calculation according to first vectors respectively representing normal vectors of minute areas provided on said surface and second vectors respectively representing directions from said minute areas toward said imaginary light source and calculating an inner product of said first and second vectors; and (F) means for weighting a signal representative of said input video image data or said input video image data according to said weighting factors whereby both luminescence and hue components of said signal are changed according to said weighting factors.
Claim 8
Independent Claim
106 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface comprising: (A) means for defining said three-dimensional surface; (B) means for providing mapping data for transforming said two-dimensional input video image data onto said surface; (C) first memory means for storing said two-dimensional input video image data; (D) means for transforming said input video image data stored in said first memory means according to said mapping data so as to provide a two-dimensional output video image data; (E) means for detecting gap portions on said output video image data according to said mapping data when no properly transformed video image data exists.
Claim 9
Independent Claim
106 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface comprising: (A) means for defining said three-dimensional surface; (B) means for providing mapping data for transforming said two-dimensional input video image data onto said surface; (C) first memory means for storing said two-dimensional input video image data; (D) means for transforming said input video image data stored in said first memory means according to said mapping data so as to provide a two-dimensional output video image data; (E) means for detecting gap portions on said output video image data according to said mapping data when no properly transformed video image data exists.
Claim 10
Dependent Claim
45 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 6, further comprising second memory means for storing gap data according to said mapping data, said detected gap portions being processed in response to said gap data system.
Claim 11
Dependent Claim
60 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 7, wherein said second memory means including a first flag memory in which write flag data are stored corresponding to said output video image data, each of said write flag data being representative of existence of each of said output video image data.
Claim 12
Dependent Claim
67 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 7, wherein said second memory means including a second flag memory in which front/back flag data are stored corresponding to said output video image data, each of said front/back flag data indicating whether the front side or the back side of the input video image is transformed onto said surface.
Claim 13
Dependent Claim
50 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 7 wherein said second memory means including a third flag memory in which address data of said input video image on said first memory means corresponding to said input video image are stored.
Claim 14
Dependent Claim
33 words
A method of transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 1, wherein said weighting factors calculated in the step (H) have a maximum and/or minimum value.
Claim 15
Dependent Claim
30 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 5, further comprising means for setting the position of said imaginary light source.
Claim 16
Dependent Claim
32 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 5, further comprising means for weighting a digital representation of said input video image signal.
Claim 17
Dependent Claim
62 words
A system for transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 5, wherein said second memory means comprises: (a) means for calculating normal vectors of said minute areas provided on said surface; (b) means for calculating front/back flags of said minute areas; and (c) means for calculating an inner product of said first and second vectors.
Claim 18
Dependent Claim
45 words
A system for transforming a two-dimensional input video image data into a three-dimensional surface as set forth in claim 6, further including means for interpolating video image data for said gap portions by calculation of video image data on the circumference of said gap portions.
Claim 19
Dependent Claim
42 words
The method of transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 1, wherein said signal representative of said two-dimensional input video image data is a digital signal after A/D conversion of said input video image data.
Claim 20
Dependent Claim
35 words
The method of transforming a two-dimensional input video image data onto a three-dimensional surface according to claim 1, wherein said signal representative of said two-dimensional input video image data is said two-dimensional video image data.
Claim 21
Independent Claim
174 words
The method of transforming a two-dimensional input video image data onto a three- dimensional surface wherein said two-dimensional input video image data has been transferred onto a three-dimensional surface according to predetermined mapping data so as provide three-dimensional video image data on said three-dimensional surface, comprising the steps of: (A) calculating first vectors respectively representing normal vectors of minute areas provided on said surface; (B) calculating second vectors respectively representing directions from said minute areas toward an imaginary light source disposed at an arbitrary position; (C) calculating values of an inner product of said first and second vectors; (D) calculating weighting factors according to said values of said inner product of said first and said second vectors calculated in steps (A) and (B), said weighting factors respectively representing said shading on said minute areas caused by said imaginary light source; and (E) weighting a signal representative of said two-dimensional input video image data according to said weighting factors whereby both luminescence and hue components of said signal are changed according to said weighting factors.
Claim 22
Independent Claim
174 words
The method of transforming a two-dimensional input video image data onto a three- dimensional surface wherein said two-dimensional input video image data has been transferred onto a three-dimensional surface according to predetermined mapping data so as provide three-dimensional video image data on said three-dimensional surface, comprising the steps of: (A) calculating first vectors respectively representing normal vectors of minute areas provided on said surface; (B) calculating second vectors respectively representing directions from said minute areas toward an imaginary light source disposed at an arbitrary position; (C) calculating values of an inner product of said first and second vectors; (D) calculating weighting factors according to said values of said inner product of said first and said second vectors calculated in steps (A) and (B), said weighting factors respectively representing said shading on said minute areas caused by said imaginary light source; and (E) weighting a signal representative of said two-dimensional input video image data according to said weighting factors whereby both luminescence and hue components of said signal are changed according to said weighting factors.
References Cited (Backward Citations)
US3441789A
Cited
US3585628A
Cited
US3976982A
Cited
US4168488A
Cited
US4283765A
Cited
US4484347A
Cited
GB2119594A
Cited
US4570233A
Cited
US4604614A
Cited
US4475104A
Cited
US4622588A
Cited
US4594673A
Cited
US4615013A
Cited
US4625290A
Cited
US4685070A
Cited
US4709231A
Cited
US4727364A
Cited
US4653013A
Cited
US4625289A
Cited
US4682217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |