GB1332892A - Image analysis - Google Patents

Image analysis

Info

Publication number
GB1332892A
GB1332892A GB2030273A GB1332892DA GB1332892A GB 1332892 A GB1332892 A GB 1332892A GB 2030273 A GB2030273 A GB 2030273A GB 1332892D A GB1332892D A GB 1332892DA GB 1332892 A GB1332892 A GB 1332892A
Authority
GB
United Kingdom
Prior art keywords
amplifier
detector
image analysis
video signal
derived
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2030273A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Image Analysing Computers Ltd
Original Assignee
Image Analysing Computers Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Image Analysing Computers Ltd filed Critical Image Analysing Computers Ltd
Publication of GB1332892A publication Critical patent/GB1332892A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation

Abstract

1332892 Television; pulse thresholding IMAGE ANALYSIS COMPUTERS Ltd 29 Oct 1970 20302/73 Divided out of 1332891 Headings H3T and H4F An image analysis system comprises a source (10) of scanned video signals, a threshold detector (12) producing a binary output, and a variable gain amplifier 130 arranged between the source and the detector, the gain of the amplifier being controlled by a voltage which varies in accordance with the low frequency average amplitude variation in the video signal caused by shading. In a first embodiment, Fig. 3, the control voltage is derived from the video signal by a low-pass filter 134 and an amplifier 136. The video signal is passed to the amplifier 130 by a delay line 132 and the threshold level of detector 12 is determined by potentiometer 128. In a second embodiment, Fig. 4 (not shown), the control voltage is derived by means of a peak level detector and an amplifier.
GB2030273A 1969-10-31 1970-10-29 Image analysis Expired GB1332892A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB5340569 1969-10-31
GB1056070 1970-03-05
GB2030273 1970-10-29

Publications (1)

Publication Number Publication Date
GB1332892A true GB1332892A (en) 1973-10-10

Family

ID=27256543

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2030273A Expired GB1332892A (en) 1969-10-31 1970-10-29 Image analysis

Country Status (1)

Country Link
GB (1) GB1332892A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705401A (en) * 1985-08-12 1987-11-10 Cyberware Laboratory Inc. Rapid three-dimensional surface digitizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705401A (en) * 1985-08-12 1987-11-10 Cyberware Laboratory Inc. Rapid three-dimensional surface digitizer

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees