摘要:
A surveillance system having surveillance terminals and a surveillance center is configured to perform effective hazard alert signaling, depending on the hazard type. The surveillance system comprises a plurality of surveillance terminals, which are connected to the surveillance center by a network, carries out hazard and alert signaling. One surveillance terminal detects a hazard and sends a hazard information signal reporting what hazard has just been detected to the surveillance center. The surveillance center receives the hazard information signal, identifies what type of hazard source and the surveillance terminal that sent the hazard information signal, selects surveillance terminals to be alerted to the hazard from among the plurality of surveillance terminals, depending on the identified type of the hazard source and its locality, and sends a hazard alert signal to the selected surveillance terminals.
摘要:
An apparatus and method for processing signals of an imaging device comprising a detection circuit for detecting the color temperature of a light source for illuminating an object of which the image is picked up and a circuit for varying .gamma. correction characteristics for chrominance signals, whereby the .gamma. correction characteristics are changed to reduce the gains for low level regions of input signals to .gamma. correction circuits in accordance with the color temperature, thereby enabling the final quantize noise to be reduced.
摘要:
In a digital signal processor for an imaging system, a first pixel signal including first and second color information items and a second pixel signal including third and fourth color information items are alternately outputted to generate an image signal, which is subdivided into a portion to be delayed by a horizontal scanning period and a portion not to be delayed such that these signals are thereafter combined to form an image signal having respective pixel signals so as to achieve a matrix processing on the resultant signal to attain red, blue, and green signals.
摘要:
The large circuit scale problem is avoided by applying a systematic algorithm for both enlargement and reduction. A resolution conversion unit for converting the resolution of an input video signal with a magnification of M/N is provided with a storage part for storing the arithmetic result, an arithmetic part having an adding part for adding a positive integer M to an output of the storage part and a subtracting part for subtracting a positive integer N from the output of the storage part, a memory part for temporarily storing a video signal, a memory control part for generating a reading and/or writing control signal based on an output supplied from the arithmetic part, and a pixel value arithmetic part for calculating an output pixel value corresponding to a pixel value included in an input video signal based on an output supplied from the arithmetic part.
摘要:
A video camera in which an output signal from a solid-state image sensor is converted into the corresponding digital signal at the horizontal reading cycle of the output signal, and the digital signal is digital-processed with a first predetermined clock (fs) synchronous with the reading cycle to provide a luminance signal and a color difference signal. This video camera comprises data clock converter for latching the color signals; control circuit for detecting the phase of the changing point of the color signal generated; phase correction circuit for receiving the color signal after data clock conversion from said data clock converter, and producing a phase-corrected color difference signal by selecting, in accordance with said phase detecting signal from the control circuit, either one of the color difference signal having an intermediate phase obtained by interpolating the signals before and after the changing point of the received color signal and said color difference signal after data clock conversion; and modulation circuit for quadrature-balanced-modulating the color difference signal supplied from said phase correction circuit to provide a modulated color signal.
摘要:
A picture synthesizing apparatus in which a main picture is displayed with a part inlaid with a subsidiary picture. The apparatus includes an AGC circuit for regulating the gain of the main video signal and an AGC circuit for regulating the gain of a subsidiary video signal. Alternatively, the chrominance signal level of the subsidiary video signal can be regulated in accordance with the chrominance signal level of the main video signal.
摘要:
An image processing system comprising a first and second video signal sources providing a main-field video signal and sub-field video signal, respectively, means for compressing the sub-field video signal on the time axis, and a signal merging unit which merges the compressed sub-field video signal into the main-field video signal and delivers the resulting signal to a television receiver set, wherein the signal compressing means comprising a dual-port memory having a first and second ports and operating to compress the sub-field video signal on the time axis and store the compressed signal, and control means for controlling the reading and writing of the memory for the sub-field video signal, the control means comprising a first control section for writing the sub-field video signal into the first port of said memory, a second control section for transferring a signal from the first port to the second port, and a third control section for reading out a signal from the second port, said memory implementing the reading operation and writing operation in asynchronous manner.
摘要:
When defective pixels of a solid state image pickup device of a video camera are corrected by signal processes, a white spot noise is detected by closing an iris and by comparing the signal level and a level of only a dark current. Further, in this case, a gain of an AGC circuit for controlling a gain of a video signal is raised and a precise detection is executed. By executing such a detecting operation at the time of turn-on or turn-off of a power source, the user is not annoying. In the ordinary photographing, a reference level in detection of a white spot noise is set to an optimum value in accordance with a temperature of the solid state image pickup device or its peripheral temperature or the gain of the AGC circuit so that the white spot noise detection is not influenced by the temperature of the solid state image pickup device or the operating state of the AGC circuit.
摘要:
In order to attain such editing that the fade in/fade out effect is obtained at a joint between scenes, an editing circuit for magnetic recording and reproducing apparatus includes memory for storing therein the last field (or one frame) of a video signal of a first scene recorded on magnetic tape, and operation processing circuit for adding an output signal obtained by repetitively reading out signals from the memory to a video signal of a second scene supplied from outside with proportions sucessively changed. The output signal of the operation processing circuit is supplied to the magnetic tape as a recording signal.
摘要:
When defective pixels of a solid state image pickup device of a video camera are corrected by signal processes, a white spot noise is detected by closing an iris and by comparing the signal level and a level of only a dark current. Further, in this case, a gain of an AGC circuit for controlling a gain of a video signal is raised and a precise detection is executed. By executing such a detecting operation at the time of turn-on or turn-off of a power source, the user is not annoying. In the ordinary photographing, a reference level in detection of a white spot noise is set to an optimum value in accordance with a temperature of the solid state image pickup device or its peripheral temperature or the gain of the AGC circuit so that the white spot noise detection is not influenced by the temperature of the solid state image pickup device or the operating state of the AGC circuit.