Thermographic areameter
First Claim
1. An area meter for a video thermographic display having a scan field comprising means for defining a predetermined area within said scan field and means for determining and displaying a numerical representation of a proportional area of said predetermined area relative to the total area of the scan field.
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Accused Products
Abstract
An area meter for a thermographic display comprising means for defining a predetermined area within a scan field and means for determining and displaying a numerical representation of the proportional area of said predetermined area relative to the total area of the scan field. This is useful in the medical diagnostic field for determining with increased accuracy areas of the body which contain distinct temperature variances from the general background field.
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Citations
18 Claims
- 1. An area meter for a video thermographic display having a scan field comprising means for defining a predetermined area within said scan field and means for determining and displaying a numerical representation of a proportional area of said predetermined area relative to the total area of the scan field.
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5. An area meter for use with video display apparatus forming a video scan field comprising:
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means responsive to received horizontal synchronizing signals used in forming said video scan field for providing a first signal representing the time between said horizontal synchronizing signals; means responsive to received vertical synchronizing signals used in forming said video scan field for providing a second signal representing the time between said vertical synchronizing signals; means for receiving a plurality of sample slice signals corresponding to various display windows from video display circuitry within said apparatus synchronized with said horizontal and vertical synchronizing signals; means for selecting a received slice signal from said plurality of sample slice signals corresponding to a particular image portion of said video scan field and for providing a pulse signal during the period of a selected slice signal; and summing integration means responsive to a predetermined coincidence relationship between said first, second and pulse signals for providing as an output an increasing ramp signal which is an integration of a voltage valve during the period between a first pair of received vertical synchronization signals and during the intervals between received horizontal synchronization signals and during the presence of said pulse signal. - View Dependent Claims (6, 7, 8, 9, 17, 18)
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Specification