Patent US5745173A successfully refreshed from Google Patents.
US5745173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine vision camera and video preprocessing system
Assignee: ACTIVE VISION SYSTEMS Inc
•
Filing: 1994-11-15
•
Granted: 1998-04-28
•
Expires: 2014-11-15
Abstract
Abstract An improved camera system intended for a machine vision system which produces an image output that is specially adapted to be received by a machine vision system. In one embodiment, the camera system receives components from three portions of the electromagnetic spectrum, these being infrared, visible, and ultraviolet, and then combines these three portions essentially as expanded colors in an expanded version of an RGB "red/green/blue" video system. This provides a better image in all types of weather and visibility conditions. In addition, the camera system includes dynamic range transform logic which selectively compresses the dynamic range of the respective pixel values comprising the image to extract the most useful information from the extended dynamic range of the image. This reduces the amount of information required to be processed while retaining a quality image. The camera system also includes motion compensation logic that removes the motion or jitter caused by the camera system being subject to vibration from various environmental influences. The system also optionally removes stationary background features from the output image.
Inventors
- 👤 Michael Kenneth Edwards
- 👤 Paul Howard Mayeaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:16
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/60; H04N23/68; H04N23/681; H04N23/6811; H04N23/682; H04N23/683; H04N25/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
111 words
A video preprocessing system for use in machine vision systems, comprising: receiving means for receiving electromagnetic radiation of varying frequencies from a scene and for producing infrared, visible, and ultraviolet signals corresponding to the infrared, visible, and ultraviolet portions, respectively, of said electromagnetic radiation; first, second, and third dynamic range transform means receiving said infrared, visible, and ultraviolet signals, respectively, for companding the dynamic range of said received infrared, visible and ultraviolet signals to produce dynamic range companded infrared, visible, and ultraviolet signals; and means receiving said dynamic range companded infrared, visible, and ultraviolet signals for producing a composite output image using each of said companded infrared, visible, and ultraviolet signals.
Claim 2
Dependent Claim
111 words
A video preprocessing system for use in machine vision systems, comprising: receiving means for receiving electromagnetic radiation of varying frequencies from a scene and for producing infrared, visible, and ultraviolet signals corresponding to the infrared, visible, and ultraviolet portions, respectively, of said electromagnetic radiation; first, second, and third dynamic range transform means receiving said infrared, visible, and ultraviolet signals, respectively, for companding the dynamic range of said received infrared, visible and ultraviolet signals to produce dynamic range companded infrared, visible, and ultraviolet signals; and means receiving said dynamic range companded infrared, visible, and ultraviolet signals for producing a composite output image using each of said companded infrared, visible, and ultraviolet signals.
Claim 3
Dependent Claim
70 words
The video preprocessing system of claim 1, wherein each of said dynamic range transform means expands a portion of the dynamic range of said received infrared, visible, and ultraviolet signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said received infrared, visible, and ultraviolet signals into a second portion of the dynamic range of said companded signals.
Claim 4
Dependent Claim
78 words
The video preprocessing system of claim 2, wherein said received infrared, visible, and ultraviolet signals comprise incoming pixel values, wherein each of said dynamic range transform means maps incoming pixel values below a pixel value knee level to higher pixel value levels according to a first gain and maps incoming pixel values above said pixel value knee level to pixel values according to a second incremental gain, wherein said first gain is greater than said second incremental gain.
Claim 5
Dependent Claim
83 words
The video preprocessing system of claim 3, wherein said incoming pixel values below said pixel value knee level have a first range and said incoming pixel values above said pixel value knee level have a second range, wherein each of said dynamic range transform means expands the first range of pixel values below said pixel value knee level according to said first gain and compresses the second range of said pixel values above said pixel value knee level by said second incremental gain.
Claim 6
Dependent Claim
34 words
The video preprocessing system of claim 1, further comprising: motion compensation means receiving portions of said output image for adjusting said output image to compensate for jitter caused by environmental influences on the system.
Claim 7
Dependent Claim
114 words
A video preprocessing system for use in machine vision systems, comprising: a charge coupled device grid receiving electromagnetic radiation of varying frequencies from a scene and for producing infrared, visible, and ultraviolet signals corresponding to the infrared, visible, and ultraviolet portions, respectively, of said electromagnetic radiation; first, second, and third dynamic range transform adjusters receiving said infrared, visible, and ultraviolet signals, respectively, for companding the dynamic range of said received infrared, visible and ultraviolet signals to produce dynamic range companded infrared, visible, and ultraviolet signals; and wherein said dynamic range companded infrared, visible, and ultraviolet signals are used to produce a composite output image using each of said infrared, visible, and ultraviolet companded signals.
Claim 8
Dependent Claim
114 words
A video preprocessing system for use in machine vision systems, comprising: a charge coupled device grid receiving electromagnetic radiation of varying frequencies from a scene and for producing infrared, visible, and ultraviolet signals corresponding to the infrared, visible, and ultraviolet portions, respectively, of said electromagnetic radiation; first, second, and third dynamic range transform adjusters receiving said infrared, visible, and ultraviolet signals, respectively, for companding the dynamic range of said received infrared, visible and ultraviolet signals to produce dynamic range companded infrared, visible, and ultraviolet signals; and wherein said dynamic range companded infrared, visible, and ultraviolet signals are used to produce a composite output image using each of said infrared, visible, and ultraviolet companded signals.
Claim 9
Dependent Claim
70 words
The video preprocessing system of claim 6, wherein each of said dynamic range transform adjusters expands a portion of the dynamic range of said received infrared, visible, and ultraviolet signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said received infrared, visible, and ultraviolet signals into a second portion of the dynamic range of said companded signals.
Claim 10
Dependent Claim
78 words
The video preprocessing system of claim 7, wherein said received infrared, visible, and ultraviolet signals comprise incoming pixel values, wherein each of said dynamic range transform adjusters maps incoming pixel values below a pixel value knee level to higher pixel value levels according to a first gain and maps incoming pixel values above said pixel value knee level to pixel values according to a second incremental gain, wherein said first gain is greater than said second incremental gain.
Claim 11
Dependent Claim
83 words
The video preprocessing system of claim 8, wherein said incoming pixel values below said pixel value knee level have a first range and said incoming pixel values above said pixel value knee level have a second range, wherein each of said dynamic range transform adjusters expands the first range of pixel values below said pixel value knee level according to said first gain and compresses the second range of said pixel values above said pixel value knee level by said second incremental gain.
Claim 12
Dependent Claim
33 words
The video preprocessing system of claim 6, further comprising: a motion compensator receiving portions of said output image for adjusting said image to compensate for jitter caused by environmental influences on the system.
Claim 13
Independent Claim
75 words
A method for performing video preprocessing, comprising: receiving electromagnetic radiation of varying frequencies from a scene; producing infrared, visible, and ultraviolet signals corresponding to the infrared, visible, and ultraviolet portions, respectively, of said electromagnetic radiation; separately companding the dynamic range of each of said infrared, visible and ultraviolet signals to produce dynamic range companded infrared, visible and ultraviolet signals; and producing a composite output image using each of said companded infrared, visible, and ultraviolet signals.
Claim 14
Independent Claim
75 words
A method for performing video preprocessing, comprising: receiving electromagnetic radiation of varying frequencies from a scene; producing infrared, visible, and ultraviolet signals corresponding to the infrared, visible, and ultraviolet portions, respectively, of said electromagnetic radiation; separately companding the dynamic range of each of said infrared, visible and ultraviolet signals to produce dynamic range companded infrared, visible and ultraviolet signals; and producing a composite output image using each of said companded infrared, visible, and ultraviolet signals.
Claim 15
Dependent Claim
73 words
The method claim of claim 11, wherein said infrared, visible, and ultraviolet signals comprise incoming pixel values and said separately companding comprises mapping incoming pixel values below a pixel value knee level to higher pixel value levels according to a first gain and mapping incoming pixel values above said pixel value knee level to pixel values according to a second incremental gain, wherein said first gain is greater than said second incremental gain.
Claim 16
Dependent Claim
78 words
The method of claim 12, wherein said incoming pixel values below said pixel value knee level have a first range and said incoming pixel values above said pixel value knee level have a second range, wherein said separately companding comprises expanding the first range of pixel values below said pixel value knee level according to said first gain and compressing the second range of said pixel values above said pixel value knee level by said second incremental gain.
Claim 17
Dependent Claim
150 words
A video preprocessing system for use in machine vision systems, comprising: video source means for receiving electromagnetic radiation of varying frequencies from a scene and for producing signals representing an image, wherein said signals have a dynamic range, wherein said signals correspond to two or more of the infrared, visible, and ultraviolet portions of said electromagnetic radiation; dynamic range transform means receiving said signals and for companding the dynamic range of said signals and for producing dynamic range companded signals, wherein said dynamic range transform means expands a portion of the dynamic range of said signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said signals into a second portion of the dynamic range of said companded signals; and means for receiving said companded signals and for producing a composite output image based on said companded signals.
Claim 18
Dependent Claim
150 words
A video preprocessing system for use in machine vision systems, comprising: video source means for receiving electromagnetic radiation of varying frequencies from a scene and for producing signals representing an image, wherein said signals have a dynamic range, wherein said signals correspond to two or more of the infrared, visible, and ultraviolet portions of said electromagnetic radiation; dynamic range transform means receiving said signals and for companding the dynamic range of said signals and for producing dynamic range companded signals, wherein said dynamic range transform means expands a portion of the dynamic range of said signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said signals into a second portion of the dynamic range of said companded signals; and means for receiving said companded signals and for producing a composite output image based on said companded signals.
Claim 19
Dependent Claim
31 words
The video preprocessing system of claim 14, further comprising: motion compensation means receiving said companded signals for adjusting said image to compensate for jitter caused by environmental influences on the system.
Claim 20
Dependent Claim
144 words
A video preprocessing system for use in machine vision systems, comprising: a charge coupled device grid for receiving electromagnetic radiation of varying frequencies from a scene and for producing signals corresponding to two or more of the infrared, visible, and ultraviolet portions of said electromagnetic radiation, said signals having a dynamic range; a dynamic range transform adjuster receiving said signals for companding the dynamic range of said signals and for producing dynamic range companded signals, wherein said dynamic range transform adjuster expands a portion of the dynamic range of said signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said signals into a second portion of the dynamic range of said companded signals; and wherein said companded signals are used to produce a composite output image based on said companded signals.
Claim 21
Dependent Claim
144 words
A video preprocessing system for use in machine vision systems, comprising: a charge coupled device grid for receiving electromagnetic radiation of varying frequencies from a scene and for producing signals corresponding to two or more of the infrared, visible, and ultraviolet portions of said electromagnetic radiation, said signals having a dynamic range; a dynamic range transform adjuster receiving said signals for companding the dynamic range of said signals and for producing dynamic range companded signals, wherein said dynamic range transform adjuster expands a portion of the dynamic range of said signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said signals into a second portion of the dynamic range of said companded signals; and wherein said companded signals are used to produce a composite output image based on said companded signals.
Claim 22
Independent Claim
120 words
A method for performing video preprocessing, comprising: receiving electromagnetic radiation of varying frequencies from a scene and producing signals corresponding to two or more of the infrared, visible, and ultraviolet portions of said electromagnetic radiation, said signals having a dynamic range; companding the dynamic range of said signals to produce dynamic range companded signals after said step of receiving, wherein said step of companding expands a portion of the dynamic range of said signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said signals into a second portion of the dynamic range of said companded signals; and producing a composite output image based on said companded signals.
Claim 23
Independent Claim
120 words
A method for performing video preprocessing, comprising: receiving electromagnetic radiation of varying frequencies from a scene and producing signals corresponding to two or more of the infrared, visible, and ultraviolet portions of said electromagnetic radiation, said signals having a dynamic range; companding the dynamic range of said signals to produce dynamic range companded signals after said step of receiving, wherein said step of companding expands a portion of the dynamic range of said signals into a first portion of the dynamic range of said companded signals and compresses the remainder of the dynamic range of said signals into a second portion of the dynamic range of said companded signals; and producing a composite output image based on said companded signals.
References Cited (Backward Citations)
US5001348A
Cited
US5221963A
Cited
US5479204A
Cited
US5389918A
Cited
US5161107A
Cited
US5278663A
Cited
US5436662A
Cited
US5388138A
Cited
US5493622A
Cited
US5497191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-27 | 2001-10-27 | 2002-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-27 | 2005-10-27 | 2006-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-27 | 2009-10-27 | 2010-04-28 | $7700.00 | Window Closed / Lapsed |