Image data reading and processing apparatus
First Claim
Patent Images
1. An image reading system comprising;
- an imaging array comprising rows and columns of light sensitive solid state elements;
focusing means for focusing an image containing field of view onto said array;
timer means for generating and applying row reading signals to said array;
synchronizing means for applying column reading signals to said array;
converter means for converting the read-out of said array to a digital signal and applying the digital signal to a storage device;
counter means for applying address information signals to said storage device concurrently with the digital signal from said converter means for identifying and locating the digital signals relative to the total field focused on said array;
a signal processor member;
means for applying the stored signals in said storage device to said processor member for analyzing the read image and determining the location of an object or objects within the field, and identifying the particular area of the array in which the object is located, said processor member being adapted to alter the row reading rate of said timer means row reading signals to a first rate in those portions of the array outside the particular area, and to read only the partial rows defining the particular area after the first row of the particular area is reached during the reading process at a rate different from said first rate; and
latch means for switching said storage device between a data receiving condition and a data output condition under control of said processor member, said latch means being adapted to actuate switching means to switch said storage device from a write mode wherein signals from said converter means are applied to said storage device to a read mode wherein data contained in said storage device is applied to said signal processing member.
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Abstract
An image reading system observes a field of view and forms electrical signals indicating the presence of objects within the field as to location and movement. After ascertaining the area of the field in which an object is located, the system is speeded up by reading signals outside the area at a high rate of speed and those inside the area at a normal rate of speed.
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Citations
17 Claims
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1. An image reading system comprising;
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an imaging array comprising rows and columns of light sensitive solid state elements; focusing means for focusing an image containing field of view onto said array; timer means for generating and applying row reading signals to said array; synchronizing means for applying column reading signals to said array; converter means for converting the read-out of said array to a digital signal and applying the digital signal to a storage device; counter means for applying address information signals to said storage device concurrently with the digital signal from said converter means for identifying and locating the digital signals relative to the total field focused on said array; a signal processor member; means for applying the stored signals in said storage device to said processor member for analyzing the read image and determining the location of an object or objects within the field, and identifying the particular area of the array in which the object is located, said processor member being adapted to alter the row reading rate of said timer means row reading signals to a first rate in those portions of the array outside the particular area, and to read only the partial rows defining the particular area after the first row of the particular area is reached during the reading process at a rate different from said first rate; and latch means for switching said storage device between a data receiving condition and a data output condition under control of said processor member, said latch means being adapted to actuate switching means to switch said storage device from a write mode wherein signals from said converter means are applied to said storage device to a read mode wherein data contained in said storage device is applied to said signal processing member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An image reading system for locating objects within a field of view comprising, in combination,
a camera member comprising an array of rows and columns of light sensitive detecting devices and means for focusing a field of view onto said array, a processor device, a synchronizing means for applying synchronizing signals to said processor device, a latch means adapted to receive signals from said processor device for generating set signals and reset signals, an illuminating device for illuminating the field of view upon receiving an activating signal from said latch means, and for turning off a set device upon receipt of a deactivating signals from said latch means, a timer means for applying row shift signals to said array upon receipt of a set signal from said latch means for reading each row of said array, said synchronizing means being adapted to supply column reading signals to said array; -
a register means for receiving the electrical signals from each row as it is read and for producing a serial analog signal output, an analog to digital converter for receiving the analog signal output of said register means and converting it to a digital pulse train upon receipt of a set signal from said latch means, a random access memory device having a write mode and a read mode, first means under control of the signals from said latch means for placing said memory device in the write mode, second means under control of the signals from said latch means for applying the digital pulse train from said converter to said memory device in the write mode for storage therein, a counter means for generating address information signals upon receipt of an activating signal from said latch means, third means under control of the signals from said latch means for applying the address information signals from said counting means to said memory device in the write mode to identify each digital word of the digital pulse train as to location in the rows and columns of said array, said first means being adapted, upon receipt of a reset signal from said latch means, to connect said memory device to said processor device in a read mode, said second means being adapted, upon receipt of a reset signal from said latch means, to connect said memory device to said processor device in a data output mode, said third means being adapted, upon receipt of a reset signal from said latch means to connect address information signals from said processor device to said memory device, said processor device being adapted, upon receipt of the data and address information signals, to ascertain what portion of the field of view focussed on the array contains the object being located and to apply control signals to said timer means to cause that portion of the array that does not contain the object to be read at a first rate, and that portion of the array that contains the object to be read at a second rate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification
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Current AssigneeCognex Corporation
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Original AssigneeGeorgia Tech Research Corporation (University System of Georgia)
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InventorsLee, Kok-Meng, Dickerson, Stephen L.
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Primary Examiner(s)Kostak, Victor R.
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Application NumberUS07/716,266Time in Patent Office449 DaysField of Search358/224, 358/108, 358/101, 358/93, 358/209, 358/213.27, 901/46, 901/47US Class Current348/311CPC Class CodesG06T 1/0007 Image acquisitionH04N 23/74 by influencing the scene br...H04N 25/443 by reading pixels from sele...
