US20050140777A1 - Dataconferencing system and method - Google Patents
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- US20050140777A1 US20050140777A1 US11/037,525 US3752505A US2005140777A1 US 20050140777 A1 US20050140777 A1 US 20050140777A1 US 3752505 A US3752505 A US 3752505A US 2005140777 A1 US2005140777 A1 US 2005140777A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00795—Reading arrangements
- H04N1/00798—Circuits or arrangements for the control thereof, e.g. using a programmed control device or according to a measured quantity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00795—Reading arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00795—Reading arrangements
- H04N1/00798—Circuits or arrangements for the control thereof, e.g. using a programmed control device or according to a measured quantity
- H04N1/00822—Selecting or setting a particular reading mode, e.g. from amongst a plurality of modes, simplex or duplex, or high or low resolution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
- H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
- H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
- H04N1/0282—Using a single or a few point light sources, e.g. a laser diode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
- H04N1/195—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a two-dimensional array or a combination of two-dimensional arrays
- H04N1/19594—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a two-dimensional array or a combination of two-dimensional arrays using a television camera or a still video camera
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/04—Scanning arrangements
- H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
- H04N2201/0436—Scanning a picture-bearing surface lying face up on a support
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/04—Scanning arrangements
- H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
- H04N2201/0458—Additional arrangements for improving or optimising scanning resolution or quality
Abstract
A dataconferencing system comprises an imaging device adapted to generate an image of a document. The system also comprises a light source adapted to generate light proximate to the document for generating the image. A monitor application accessible by a processor is adapted to detect a change corresponding to the document. A lighting application accessible by the processor is adapted to automatically activate the light source in response to the detected change.
Description
- The present invention relates generally to the field of data communications and, more particularly, to a dataconferencing system and method.
- Remote sites may be connected using the Internet, an intranet, or over standard telephone lines to accommodate conferencing between the sites. For example, each site may include a microphone, speakerphone, or other device for transmitting audio signals between the sites, a camera for generating and transmitting video signals between the sites, and perhaps a whiteboard for sharing written data between the sites. Each site may also include an overhead projector for remotely viewing documents.
- Present dataconferencing systems, however, suffer several disadvantages. For example, in the case of document viewing, inadequate lighting may cause shadowing on portions of the document, thereby resulting in poor image quality and difficulty in viewing the document by the remote site. Additional lighting may be used to increase the light intensity directed toward the document. However, the additional lighting often generates excessive amounts of heat, consumes additional power, and creates glare. Further, present dataconferencing systems may also be limited to providing intermittent snapshots of transparency slides. Thus, present systems may be incapable of providing real-time remote image viewing which may be desirable for classroom teaching or other applications.
- In accordance with one embodiment of the present invention, a dataconferencing system comprises an imaging device adapted to generate an image of a document. The system also comprises a light source adapted to generate light proximate to the document for generating the image. A monitor application accessible by a processor is adapted to detect a change corresponding to the document. A lighting application accessible by the processor is adapted to automatically activate the light source in response to the detected change.
- In accordance with another embodiment of the present invention, a dataconferencing method comprises receiving a document. The method also comprises detecting a change to the document and automatically activating a light source to generate light proximate to the document in response to the detected change. The method further comprises generating an image of the document using the generated light.
- For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following descriptions taken in connection with the accompanying drawings in which:
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FIG. 1 is a perspective diagram illustrating an embodiment of a dataconferencing system in accordance with the present invention; -
FIG. 2 is a block diagram illustrating an embodiment of a dataconferencing system in accordance with the present invention; and -
FIGS. 3A and 3B are a flow chart illustrating a method for dataconferencing in accordance with an embodiment of the present invention. - The preferred embodiments of the present invention and the advantages thereof are best understood by referring to
FIGS. 1-3 of the drawings, like numerals being used for like and corresponding parts of the various drawings. -
FIG. 1 is a perspective diagram illustrating an embodiment of adataconferencing system 10 in accordance with the present invention. Briefly,system 10 provides high resolution images of documents for dataconferencing with remote sites. For example, in one embodiment, a combination of a strobe light source and a constant light source are used to accommodate various lighting requirements for producing a high resolution image of a document. The strobe light source is automatically and intermittently triggered in response to changes to the document or changes in the vicinity of the document to provide a desired intensity of light directed toward the document for high resolution image generation corresponding to the document. As the frequency of changes to the document or in the vicinity of the document increases, the constant light source may be activated to provide a generally constant light directed toward the document for continued image gathering corresponding to the document. - Referring to
FIG. 1 ,system 10 comprises adisplay 12 for providing a mounting or display surface for adocument 14 to be dataconferenced with a remote site.Document 14 may comprise an opaque, translucent, or transparent document.System 10 also comprises animaging device 16 for generating an image ofdocument 14.Imaging device 16 may comprise an analog or digital camera or other device for generating an image ofdocument 14 now known or later developed. - In the illustrated embodiment,
system 10 also comprises one or morestrobe light sources 18 and one or moreconstant light sources 20. Strobe light source(s) 18 are adapted to provide intermittent lighting directed towarddocument 14 when generating an image ofdocument 14 usingimaging device 16. Constant light source(s) 20 are used to provide a generally constant source of light directed towarddocument 14 when generating an image usingimaging device 16. Thus, while strobe light source(s) 18 provide intermittent bursts of light energy upon activation, constant light source(s) 20 are generally always on or activated, thereby generating a substantially constant source of light energy. Additionally, as will be described in greater detail below, constant light source(s) 20 may also be configured to provide varying intensities of constant light. In the illustrated embodiment,light sources document 14 such that light generated bylight sources document 14 toimaging device 16. However, other angular orientations and/or positions oflight sources document 14 andimaging device 16. - In operation,
imaging device 16 generates a series of images ofdocument 14 to determine whether changes todocument 14 require generation of a high resolution image ofdocument 14 for transmittal to a remote site. As used herein, a low resolution image may comprise an image having limited clarity, definition, or other characteristics, and a high resolution image comprises an image having greater clarity, definition, or other characteristics than a low resolution image. Thus, high resolution images may be desired for transmittal to a remote site for viewing while low resolution images may be sufficient to detect changes todocument 14 or for other purposes. The series of images for change detection may be generated using ambient light or light generated by constant light source(s) 20. For example, if ambient light is insufficient to generate an image ofdocument 14 of sufficient resolution to detect changes todocument 14, constant light source(s) 20 may be activated at a generally low intensity level to provide the desired level of resolution. The series of images generated ofdocument 14 are evaluated to detect changes corresponding todocument 14. If a change occurs to document 14, strobe light source(s) 18 may be activated to produce a generally short and high intensity light burst directed towarddocument 14 for generating a high resolution image ofdocument 14 usingimaging device 16. The high resolution image ofdocument 14 may then be transmitted to a remote site. If a frequency of changes todocument 14 increases, constant light source(s) 20 may be activated, or the intensity increased, to provide a generally constant source of light directed towarddocument 14 such thatimaging device 16 generates a series of high resolution images for transmittal to the remote site. After the frequency of changes todocument 14 decreases, constant light source(s) 20 may be deactivated or the intensity level decreased. -
System 10 may also comprise amotion detector 22 for detecting motion proximate to document 14. In operation, in response to motion detected proximate todocument 14,strobe light sources 18 may be activated to direct light towarddocument 14 for generating a high resolution image ofdocument 14 usingimaging device 16. As described above, as a frequency of motion proximate todocument 14 increases,constant light sources 20 may also be activated to generate a generally constant source of light directed towarddocument 14 for generating a series of high resolution images ofdocument 14. After generation, the high resolution image(s) may then be transmitted to the remote site. - As described above,
system 10 may be adapted to operate substantially automatically for creation of high resolution images ofdocument 14 in response to changes todocument 14 or motion proximate todocument 14.System 10 may also be configured to accommodate manual intervention by a user ofsystem 10. For example,imaging device 16 may comprise one ormore keypads 24 for activation by the user. In operation, in response to activation of one ofkeypads 24,strobe light source 18 may be activated to generate a flash of light directed towarddocument 14 for generating a high resolution image ofdocument 14 usingimaging device 16. As described above, the high resolution image may then be transmitted to a remote site.Keypads 24 may also be used to activateconstant light source 20 in anticipation of continued changes to document 14 such that a generally constant source of light is directed towarddocument 14 for generation of a substantially continuous series of high resolution images to be transmitted to the remote site. -
FIG. 2 is a block diagram illustrating an embodiment ofsystem 10 in accordance with the present invention.System 10 generates images corresponding to document 14 to accommodate dataconferencing with aremote site 26. The images may be transmitted via acommunication network 28, such as the Internet, an intranet, or other wired or wireless communication mediums now known or later developed.System 10 preferably comprisesinput devices 30,output devices 32, aprocessor 34, and amemory 36. In this embodiment,input devices 30 compriseimaging device 16,motion detector 22, andkeypad 24.Input devices 30 may also include other devices such as a keyboard, pointing device, such as a mouse or a track pad, a scanner, or other type of device for inputting information intosystem 10 now known or later developed. In the illustrated embodiment,output devices 32 comprise strobe light source(s) 18 and constant light source(s) 20. However,output devices 32 may also comprise a monitor, display, printer,communication network 28 port, or other type of device or outlet for generating an output now known or later developed. Components ofsystem 10 may be located in relatively close proximity to each other or located remote from each other. For example,processor 34 and/ormemory 36 may be located remote fromimaging device 12 or other components ofsystem 10, such as in another room, building, or city, and coupled todevice 12 and other components ofsystem 10 using wired or wireless communication networks. - The present invention also encompasses computer software that may be executed by
processor 34. In the illustrated embodiment,memory 36 comprises a monitor,application 40 and alighting application 42, which in this embodiment are computer software programs. However, it should be understood thatsystem 10 may be configured having software, hardware, and/or a combination of software and hardware components. InFIG. 2 , monitorapplication 40 andlighting application 42 are illustrated as stored inmemory 36, where they may be executed byprocessor 34. However,applications applications processor 34. Briefly, monitorapplication 40 monitors changes to document 14 or changes proximate to document 14. In response to a detected change bymonitor application 40,lighting application 42 controls activation of strobe light source(s) 18 and/or constant light source(s) 20 for generation of high resolution images ofdocument 14. - In the illustrated embodiment,
system 10 also comprises adatabase 40 stored inmemory 36.Database 40 comprises information associated with images generated by imagingdevice 16. For example, in the illustrated embodiment,database 44 comprisesimage data 50 andvariation criteria 52. Briefly,image data 50 comprises information associated with the images generated by imagingdevice 16, which may comprise low resolution images used to determine changes corresponding to document 14 or high resolution images for transmittal to a remote site.Variation criteria 52 comprise one or more criterion or information associated with detecting changes to document 14 or changes proximate to document 14. - As described above,
image data 50 comprise information associated with images generated by imagingdevice 16. In the illustrated embodiment,image data 50 comprisedetection images 60 andtransmittal images 62.Detection images 60 comprise low resolution image information generated by imagingdevice 16 for determining whether a change to document 14 requires generation of a high resolution image.Detection images 60 may be generated by imagingdevice 16 using ambient light or using light generated by constantlight source 20. For example, as described above, constantlight source 20 may be adapted to generate a desired intensity of light to produce an image of sufficient resolution to enable detection of changes to document 14 while generating a minimum amount of thermal energy and consuming minimal power.Detection images 60 represent low resolution images ofdocument 14 that may be compared tovariation criteria 52 to determine whether a change to document 14 has occurred which may require generation of a high resolution image ofdocument 14 for transmittal toremote site 26.Transmittal images 62 comprise the high resolution image information corresponding to document 14 for transmittal toremote site 26. -
Variation criteria 52 comprise information associated with evaluatingdetection images 60 to determine whether a sufficient change to document 14 has occurred, thereby requiring generation of atransmittal image 62. A variety of methods may be used to evaluatedetection images 60 to determine whether changes between compareddetection images 60 require generation of atransmittal image 62. In the illustrated embodiment,variation criteria 52 comprisespixel characteristics 64 andcontrast characteristics 66.Pixel characteristics 64 comprise comparison information ofdetection images 60 based on the pixels contained within thedetection image 60. For example,pixel characteristics 64 may be based on a color designation assigned to each pixel ofdetection images 60 such that if variations in quantity or color designations associated with the pixels ofdetection images 60 exceed a predetermined level, generation of atransmittal image 62 is required. Contrastcharacteristics 66 comprises information associated with contrast differences between compareddetection images 60 to determine whether atransmittal image 62 is required. For example,detection images 60 may be compared to determine whether a contrast value corresponding to various portions of eachdetection image 60 exceeds a predetermined level, thereby requiring generation of atransmittal image 62. - In operation, monitor
application 40 evaluatesdetection images 60 to determine whether variations between twodetection images 60 exceeds a predetermined level, thereby requiring generation of atransmittal image 62. For example,imaging device 16 may be adapted to generatedetection images 60 at a predetermined interval andstore detection images 60 indatabase 44.Monitor application 40 may comparedetection images 60 usingvariation criteria 52 to determine whether variations todetection images 60 indicate a sufficient change to document 14, thereby requiring generation of atransmittal image 62.Monitor application 40 may be adapted to comparesuccessive detection images 60 or comparenon-successive detection images 60 usingvariation criteria 52. For example, monitorapplication 40 may be adapted to use asingle detection image 60 as a baseline for comparing a series of successive detection images until differences between one of thesuccessive detection images 60 and thebaseline detection image 60 exceed thepredetermined variation criteria 52. Alternatively, monitorapplication 40 may be adapted to compare pairs ofsuccessive detection images 60 until differences between the pair ofsuccessive detection images 60 exceed thepredetermined variation criteria 52. - After variations between compared
detection images 60 exceed a predetermined level associated withvariation criteria 52,lighting application 42 activatesstrobe light source 18 to direct light towarddocument 14 for generation of a high resolution image ofdocument 14. Additionally,lighting application 42 synchronizes activation ofimaging device 16 corresponding to activation ofstrobe light source 18 for generating the high resolution image ofdocument 14. As described above,variation criteria 52 may also comprisefrequency data 68 having information associated with the frequency of generated high resolution images ofdocument 14. Thus, for example, monitorapplication 40 also determines whether a frequency of generated high resolution images exceeds a predetermined level corresponding tofrequency data 68. If the frequency of high resolution images exceeds thepredetermined frequency data 68,lighting application 42 activates constantlight source 20 to provide a generally constant light directed towarddocument 14 such thatimaging device 16 may generate a series of high resolution images corresponding to document 14. Alternatively, as described above, if ambient light is insufficient to generatedetection images 60 of sufficient resolution and a relatively low intensity of light is generated by constant light source(s) 20 for generatingdetection images 60,lighting application 42 may increase the intensity level of the light generated by constant light source(s) 20 in response to exceeding a predetermined frequency of high resolution images. -
Lighting application 42 also monitors and controls the intensity of light generated by constant light source(s) 20 such that as constant light source(s) 20 reaches a desired intensity,lighting application 42 may cease or terminate additional activation of strobe light source(s) 18. Thus, if constant light source(s) 20 are used to generate lowresolution detection images 60,system 10 may be adapted to continuestrobe light source 18 activation for generation of highresolution transmittal images 62 ofdocument 14 until constant light source(s) 20 reach a desired intensity, at which time constant light source(s) 20 may be used to generate highresolution transmittal images 62. Correspondingly, as the frequency of generation of highresolution transmittal images 62 decreases to below the predetermined level associated withfrequency data 68,lighting application 42 may deactivate or decrease the intensity level of constant light source(s) 20 and initiate activation of strobe light source(s) 18 for a next high resolutiontransmittal image 62.System 10 may also be configured such that when strobe light source(s) 18 are activated, constant light source(s) 20 are deactivated, and vice versa. - Additionally,
system 10 may transmit data toremote site 26 using a variety of methods. For example,system 10 may be adapted to transmitimages 62 toremote site 26 asimages 62 are generated. Thus, if changes to document 14 are infrequent, a quantity of data transmitted toremote site 26 is minimized. Alternatively,system 10 may be adapted to repeatedly transmit thesame image 62 toremote site 26 until anotherimage 62 indicating a change to document 14 has been generated, at which time thenew image 62 may be repeatedly transmitted toremote site 26. -
FIGS. 3A and 3B are a flowchart illustrating a method for dataconferencing in accordance with an embodiment of the present invention. The method begins atstep 100, wheresystem 10 receives adocument 14 for use in dataconferencing. Atstep 102,lighting application 42 activatesstrobe light source 18. Atstep 104,imaging device 16 generates atransmittal image 62 ofdocument 14 during activation ofstrobe light source 18. Atstep 106, the generatedtransmittal image 62 is communicated toremote site 26 viacommunication network 28. - At
step 108,imaging device 16 generates adetection image 60 corresponding to document 14. As described above,detection images 60 may be generated using ambient light orlighting application 42 may activate constantlight source 20 at a relatively low intensity for the generation ofdetection images 60. Atstep 110, monitorapplication 40 compares thetransmittal image 62 generated atstep 104 with thedetection image 60 generated atstep 108. Atdecisional step 112, monitorapplication 40 determines whether variations between thetransmittal image 62 and thedetection image 60 exceedvariation criteria 52. If the variations between thetransmittal image 62 and thedetection image 60 do not exceedvariation criteria 52, the method proceeds fromstep 112 to step 114, whereimaging device 16 generates anotherdetection image 60. Atstep 116, monitorapplication 40 compares the generateddetection images 60 usingvariation criteria 52. Atdecisional step 118, a determination is made whether variations between the compareddetection images 60 exceedvariation criteria 52. If the variation between compareddetection images 60 does not exceed a predetermined level associated withvariation criteria 52, the method returns to step 114. If the variation between compareddetection images 60 does exceed a predetermined level associated withvariation criteria 52, the method proceeds fromstep 118 to step 120. Additionally, atdecisional step 112, if the variation between thetransmittal image 62 generated atstep 104 and thedetection image 60 generated atstep 108 does exceed a predetermined level associated withvariation criteria 52, the method proceeds fromstep 112 to step 120. - At step 120, monitor
application 40 determines a frequency associated with generation oftransmittal images 62. If the frequency oftransmittal image 62 generation does not exceed a predetermined level associated withfrequency data 68, the method returns to step 102. If the frequency oftransmittal image 62 generation exceeds a predetermined level associated withfrequency data 68, the method proceeds fromstep 122 to step 124, wherelighting application 42 activatesstrobe light source 18. Atstep 126,lighting application 42 also activates constantlight source 20. For example, the intensity level of constantlight source 20 may be adjustable such that the intensity level may be increased until reaching a sufficient level to produce high resolution images, or constantlight source 20 may require time to warm up before reaching a sufficient intensity level. Atstep 128,imaging device 16 generates atransmittal image 62 associated withdocument 14. Atstep 130, the generatedtransmittal image 62 is transmitted toremote site 26 viacommunication network 28. - At
step 132, monitorapplication 40 generates adetection image 60 usingimaging device 16. Atstep 134, monitorapplication 40 compares thetransmittal image 62 generated atstep 130 with thedetection image 60 generated atstep 132. Atdecisional step 136, monitorapplication 40 determines whether a variation between thetransmittal image 62 generated atstep 130 and thedetection image 60 generated atstep 132 exceeds a predetermined level associated withvariation criteria 52. If the variation exceeds the predetermined level, the method proceeds fromstep 136 to step 138, wheremonitor application 40 determines a frequency of transmittal image generation. If the frequency associated withtransmittal image 62 generation exceeds a predetermined level associated withfrequency data 68, the method proceeds fromstep 140 to step 142, wherelighting application 42 determines an intensity of constantlight source 20. Atdecisional step 144,lighting application 42 determines whether the intensity of constantlight source 20 corresponds to a predetermined level for generating high resolution images ofdocument 14. If the intensity of constantlight source 20 is at the required level, the method returns to step 128. If the intensity of constantlight source 20 is not at the desired level, the method proceeds fromstep 144 to step 146, wherelighting application 42 activatesstrobe light source 18 for generation of the high resolution image. - At
decisional step 136, if the variation between the transmittal image generated atstep 130 and the detection image generated atstep 132 does not exceed a predetermined level associated withvariation criteria 52, the method proceeds fromstep 136 to step 148, wherelighting application 42 deactivates constantlight source 20. Additionally, atdecisional step 140, if the frequency oftransmittal image 62 generation does not exceed a predetermined level associated withfrequency data 68, the method proceeds fromstep 140 to step 148. Atdecisional step 150, a determination is made whether additional images ofdocument 14 are required for dataconferencing. If additional images are required, the method returns to step 114. If no additional images are required, the method ends.
Claims (25)
1-46. (canceled)
47. A dataconferencing system, comprising:
a monitor application adapted to compare at least two images of a document;
a lighting application adapted to automatically activate a light source to direct light toward the document if differences between the compared images exceed a variation criterion; and
an imaging device adapted to generate a transmittal image of the document using the light generated by the light source, the transmittal image having a resolution greater than a resolution of at least one of the compared images.
48. The system of claim 47 , wherein the lighting application is adapted to activate a constant light source in response to exceeding a predetermined frequency of transmittal image generation.
49. The system of claim 47 , wherein the light source comprises a strobe light.
50. The system of claim 47 , wherein the lighting application is adapted to control a frequency of light source activation.
51. The system of claim 47 , wherein the lighting application is adapted to synchronize generation of the transmittal image by the imaging device with activation of the light source.
52. The system of claim 47 , wherein the at least two compared images are generated using ambient light.
53. The system of claim 47 , wherein the differences between the at least two compared images correspond to a change to the document.
54. The system of claim 47 , wherein the light source comprises a variable intensity light source.
55. A dataconferencing method, comprising:
comparing at least two images of a document;
automatically activating a light source to direct light toward the document if differences between the compared images exceed a variation criterion; and
generating a transmittal image of the document using the light generated by the light source, the transmittal image having a resolution greater than a resolution of at least one of the compared images.
56. The method of claim 55 , wherein automatically activating the light source comprises automatically activating a constant light source in response to exceeding a predetermined frequency of transmittal image generation.
57. The method of claim 55 , wherein automatically activating the light source comprises automatically activating a strobe light.
58. The method of claim 55 , further comprising controlling a frequency of light source activation.
59. The method of claim 55 , further comprising synchronizing generation of the transmittal image with activation of the light source.
60. The method of claim 55 , wherein automatically activating the light source comprises automatically activating the light source in response to detecting a change to the document.
61. A dataconferencing system, comprising:
means for comparing at least two images of a document;
means for automatically activating a light source to direct light toward the document if differences between the compared images exceed a variation criterion; and
means for generating a transmittal image of the document using the light generated by the light source, the transmittal image having a resolution greater than a resolution of at least one of the compared images.
62. The system of claim 61 , further comprising means for synchronizing generation of the transmittal image with activation of the light source.
63. The system of claim 61 , further comprising means for activating a constant light source in response to exceeding a predetermined frequency of transmittal image generation.
64. The system of claim 61 , further comprising means for controlling a frequency of light source activation.
65. The system of claim 61 , wherein the means for comparing comprises means for detecting a change made to the document.
66. A dataconferencing system, comprising:
a monitor application adapted to detect a change associated with a document;
a lighting application adapted to automatically increase an intensity of a light source directing light toward the document in response to detecting the change; and
an imaging device adapted to generate a transmittal image of the document using the increased intensity light generated by the light source.
67. The system of claim 66 , wherein the monitor application is adapted to detect the change by comparing at least two images of the document.
68. The system of claim 66 , wherein the monitor application is adapted to detect the change to the document using ambient light.
69. The system of claim 66 , wherein the change associated with the document comprises a change made to the document.
70. The system of claim 66 , wherein the lighting application is adapted to automatically increase the intensity of the light source in response to motion proximate to the document.
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Also Published As
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US20030226950A1 (en) | 2003-12-11 |
US6878924B2 (en) | 2005-04-12 |
GB2390439A (en) | 2004-01-07 |
DE10315509B4 (en) | 2007-11-29 |
GB2390439B (en) | 2005-08-17 |
DE10315509A1 (en) | 2004-01-08 |
GB0311901D0 (en) | 2003-06-25 |
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