Electrical control system for a video tracker, including circuitry for maintaining the size of the target substantially constant relative to the tracking window, thereby improving the accuracy of the target shift detection circuit. Additional circuitry is provided for enhancing contrast between the target and the background scene, thus preventing loss of the target due to inadvertant sensing of grey clutter instead of the true target.

A method for surveying, comprising the steps of: video recording all locations to be surveyed from a predetermined control position, for subsequent playback on a monitor screen; preparing a transparent overlay having a scale correlating the predetermined control position of the video recording means with respect to the surveyed locations and the size of the screen; applying the overlay to the screen while playing back the video recording, utilizing the overlay to ascertain actual distances; and,...

The invention relates to a video cassette comprising two spools with single disk, the respective hubs of which spools are rotatably mounted with the minimum distance possible between their axes of rotation, inside a casing in two parts, so that the said disks partly overlap in projection and are contiguous respectively to the bases of the said casing parts, each base being provided, opposite the disk which it does not touch, with at least one zone projecting in extra thickness from the base in q...

A video extractor for use in a pulse radar apparatus comprises a shift-register memory for storing a number of words, each of which containing the information about the target position and size, as established for each of the range quants in which the desired range interval is divided. The video extractor thereto contains a range counter, whose counting rate is equal to the rate at which said words are shifted into the memory. An arithmetic unit receives the words shifted out of the memory and, ...

A video camera disclosed herein is used with video recorders, said camera being provided with first and second trigger switches which are manually operated in succession, said camera further including an image pick-up tube having a heater circuit therefor which is energized when the camera is operatively connected with a video recorder or when a power switch in the video recorder is turned on in the connection of said video recorder with said camera or when a recording switch is further turned o...

A video processing circuit separates chrominance and luminance signals and processes the same separately from synchronizing information whereby the video signal may be reformed with a selected video level, selected color saturation, and selected chroma hue. The synchronizing information is not reprocessed, but is coupled through the circuit and the other video signal portions are adjusted relative thereto.

A video flowmeter is described that is capable of specifying flow nature and pattern and, at the same time, the quantitative value of the rate of volumetric flow. An image of a determinable volumetric region within a fluid (10) containing entrained particles (12) is formed and positioned by a rod optic lens assembly (31) on the raster area of a low-light level television camera (20). The particles (12) are illuminated by light transmitted through a bundle of glass fibers (32) surrounding the rod...

This invention provides a video system including an image pickup device for converting an optical image into a video signal, an image pickup direction changing device for changing the image pickup direction of the image pickup device, an image display device for displaying the video signal output from the image pickup device, and a function display device for displaying function information of the image pickup device.

A coder assembles bursts of blocks of image data (e.g. transform coded coefficients) and associated overhead data into a sequence of data which are then transmitted. Both the transform coded coefficients and the overhead data are initially stored in separate FIFO memory stores (21), (22). The blocks of transform coded coefficients have a `last coefficient` flag accompanying the last coefficient, and the overhead information contains a unique word SWITCH, after the header information but before t...

The operating point of a wide band transistor amplifier is established by the charge on a capacitor which couples a source of video signals to the transistor input electrodes. A source of repetitive pulses associated with the video signals is coupled to the amplifier through the capacitor. The pulses are of an amplitude and polarity to cut off the amplifier and to serve as the predominant charging current source for the capacitor. A rectifier is coupled between the transistor input electrodes to...