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Showing papers on "Channel (digital image) published in 1984"


Patent
03 Dec 1984
TL;DR: In this article, a system for picking up, recording, transmitting, reproducing, and viewing full-color stereoscopic images is described. But this system relates to television, but has applications to graphic and visual displays and to film and motion pictures.
Abstract: A stereoscopic picture system which has a stereoscopic camera for picking-up a stereo-pair of images, a stereoscopic recorder, a stereoscopic encoder to selectively color each image of the stereo-pair and to superimpose them, a stereoscopic transmitter, a stereoscopic color display and a stereoscopic color viewing device. Each image of the stereo-pair in a color film system is selectively colored, or each is electronically colored in a color video system, to insure that the images are channeled separately through the color system to appear as two differently colored images at the display. Chromatic viewing devices, such as colored anaglyph glasses, are used by each viewer to channel one image to each respective eye. The viewer normally perceives a substantially black-and-white stereoscopic picture; however, a system for picking-up, recording, transmitting, reproducing, and viewing a full color picture is also described. The system relates to television, but has applications to graphic and visual displays and to film and motion pictures.

104 citations


Patent
01 Nov 1984
TL;DR: In this paper, a level attachment for cameras is flanged to interengage with channel tracks of a camera hot shoe in either of two positions on orthogonal axes.
Abstract: A level attachment for cameras is flanged to interengage with channel tracks of a camera hot shoe in either of two positions on orthogonal axes. The arrangement enables leveling the camera side-to-side and fore-and-aft. The level attachment is screw-threaded and can serve as a mounting for various camera accessories directly or through a threaded adapter.

24 citations


Patent
26 Jan 1984
TL;DR: In this paper, an improved multiple channel, wide-angle visual image projection system producing a movable displayed image was proposed, which allowed the use of two or more light projectors for high resolution wideangle image display while eliminating image abutment and alignment problems.
Abstract: An improved multiple channel, wide-angle visual image projection system producing a movable displayed image. The system permits the use of two or more light projectors for high resolution wide-angle image display while eliminating image abutment and alignment problems. The system forms a composite image from two or more projectors in a strategically aligned prism array, the composite image being optically transferred to a single wide-angle projection lens, gimballed in azimuth and elevation, through a pair of movable servo-driven prisms for projection onto a two-dimensional screen. The projection system is especially suited for use in an area-of-interest, helmet-slaved visual display in a flight simulator.

15 citations


Patent
12 Oct 1984
TL;DR: In this paper, a stereo X-ray subtraction system is described, where the video signals of successive stereo partial images are summed in a weighted fashion in a first image memory, with the output of the first memory being supplied to a first input of a first subtraction stage, and the outputs of the second memory being sent to a display unit for displaying the resulting stereo image.
Abstract: A stereo X-ray subtraction apparatus has a stereo X-ray system and an X-ray image intensifier television chain in which, for each channel, the video signals of successive stereo partial images are summed in a weighted fashion in a first image memory, the output of the first image memory being supplied to a first input of a first subtraction stage, with the output of the first image memory in the other channel being supplied to a second input of the first subtraction stage, the output of the first subtraction stage being supplied to a second image memory and to a first input of a second subtraction stage, and the output of the second image memory being supplied to a second input of the second subtraction stage. The outputs of the second subtraction stages for each channel are supplied to a display unit for displaying the resulting stereo image.

6 citations


01 Jan 1984
TL;DR: Preflight and in-orbit sensor and data measurements indicate that TM meets or exceeds most specifications, and preliminary applications evaluation of image contents indicates that TM provides much better definition of edges than MSS.
Abstract: Preflight and in-orbit sensor and data measurements indicate that TM meets or exceeds most specifications. Measured spectral band edges meet instrument specifications in 12 out of 14 cases; there is ample dynamic range. The signal-to-noise ratio exceeds specifications, except for band 3, channel 4; and band 7 channel 7 is very noisy but still meets specifications. The modulation transfer function of channel 4, band 2, is smaller than specified. Registration errors between the primary focal plane (PFP) and the cold focal plane (CFP) are about 0.75 pixels along-scan and 0.2 pixels across scan. Forward and reverse scan discontinuities are well within ground-processing capabilities to rectify. Instrument gain variability, up to 7 percent for band 5, requires use of the internal calibration (IC) system to assure radiometric accuracy. Preliminary applications evaluation of image contents indicates that TM provides much better definition of edges than MSS.

5 citations


Patent
30 Nov 1984
TL;DR: In this paper, the S/N ratio is obtained by sampling color signals of three primary colors at sampling frequencies corresponding to the amounts of data, and recording sampled signals, and the resulting signal is supplied to a rotating head 9 through a recording amplifier 8 and a rotary transformer 9 to be recorded on a magnetic tape.
Abstract: PURPOSE:To obtain an enough S/N ratio as compared with recording in the form of signals Y, U, and V by sampling color signals of three primary colors at sampling frequencies corresponding to the amounts of data, and recording sampled signals. CONSTITUTION:A sample output of G obtained from an image sensor 1 and a time-division sample output of R and B obtained from an image sensor 2 are supplied to A/D converters 3 and 4 respectively and converted into one-sample, eight-bit digital signals. Those outputs are supplied to a multiplexer 5, which composes data of one channel. The output of this multiplexer 5 is passed through an error correcting encoder 6 and a channel encoder 7 to perform error correcting and encoding processing and block coding processing, and the resulting signal is supplied to a rotating head 9 through a recording amplifier 8 and a rotary transformer 9 to be recorded on a magnetic tape.

Patent
26 Dec 1984
TL;DR: In this article, a program sheet having program patterns 3a-3c in mutually different colors is wound around a transparent rotating drum and images of those patterns are formed on the image sensor through optical systems.
Abstract: PURPOSE:To obtain a program signal of each channel easily by selecting the color of a different-color program pattern and making it incident to an image sensor, and obtaining plural program signals on the basis of signals corresponding to respective colors of the image sensor CONSTITUTION:A program sheet 3 having program patterns 3a-3c in mutually different colors is wound around a transparent rotating drum 1 incorporating a light source 2 Images of those patterns 3a-3c are formed on the image sensor 5 through optical systems 4a-4d and a color selecting device 6 The level of its output is detected 7 and a signal indicating the detected level is processed by an arithmetic part 8, which outputs plural program signals