Showing papers on "Image conversion published in 1972"
Patent•
13 Oct 1972TL;DR: In this paper, an ultrasonic, image conversion, high definition sonar having a multitude of transducer channels employing improved signal processing in each channel to reduce video bandwidth and switching speed requirements is described.
Abstract: Disclosed is an ultrasonic, image conversion, high definition sonar having a multitude of transducer channels employing improved signal processing in each channel to reduce video bandwidth and switching speed requirements. Signal processing is characterized in each of the multitude of channels by detecting and holding the peak return from a transmit pulse for the remainder of the pulse project period, then holding that peak value for the subsequent pulse project period, during which time the value may be multiplexed for conversion to video signals for a CRT display, or may be applied to elements of an LED array.
8 citations
TL;DR: In this paper, the problem of spatial and temporal filtering of an image by a spherical mirror type of optical interference filter is formulated, and the problem is solved by using the spherical mirror as an interference filter.
7 citations
6 citations
Patent•
23 May 1972
TL;DR: In this paper, the present invention relates to acoustical holography systems and more particularly to the liquid surface relief method of acoustic image conversion, and is related to our work.
Abstract: The present invention relates to acoustical holography systems and more particularly to the liquid surface relief method of acoustic image conversion.
5 citations