Canon Kabushiki Kaisha

Motoi Tariki

Hideyuki Arai

Kazuhiro Takahashi

Hirofumi Takei

Masamine Maeda

Kyoji Tamura

Disclosed is an image sensing apparatus having a function of removing a dark current noise component of an image sensor. This image sensing apparatus includes an image sensor such as a CCD, at least two noise component storage areas, a CPU for controlling an operation of writing a noise component of one frame generated by the image sensor into a noise component storage area selected from the at least two noise component storage areas, and a subtracter for correcting an object image photographed by the image sensor, on the basis of the noise component stored in one of the at least two noise component storage areas.

Image sensing apparatus

The state of exposure of a video zone corresponding to position information from a two-dimensional position selecting circuit that allows a photographer to select a desired video zone is detected, an exposure correction is performed by an exposure control circuit based upon a signal indicative of the detected state, and the state of exposure which prevails when optimum exposure has been attained is maintained. As a result, the state of exposure of a subject is corrected to an optimum exposure and the optimum exposure of the subject is maintained even if the state of exposure of the surroundings change owing to a change in zoom magnification or movement of the subject.

Image sensing apparatus which carries out optimum exposure control of subject

Image pickup system having an image pickup device including an image pickup element for picking up the image of an object and outputting image data, a compression encoding circuit for effecting compression encoding of the image data, a wireless transmission circuit for modulating the compression encoded image data and transmitting the data to a wireless transmission channel, and a first connector adapted to be electrically and mechanically connected, in a detachable manner, to a display device for displaying the image picked-up by the image pickup element and to transmit the image data from the image pickup element. The system also includes a display device including a wireless reception circuit for receiving the transmitted image data from the wireless transmission channel. The display device selectively receives first or second image data and processes the received image data to output an image signal of a predetermined format.

Image pickup system with separable/attachable image pickup device and display device

A video camera and a recording and reproducing apparatus each comprise a communication circuit arranged to modulate by a spread spectrum communication method a video signal outputted from an image pickup element and transmit the modulated video signal to an external monitor by wireless communication. The video camera and the recording and reproducing apparatus each further comprise a recording and reproducing part for recording and reproducing a video signal outputted from the image pickup element on and from a recording medium, and an arrangement which brings the communication circuit to a transmitting state according to the state of operation of the recording and reproducing part.

Video camera and recording and reproducing apparatus which communicate via wireless communication techniques

An image receiving unit receives a first image signal transmitted from a first image transmitting unit and a second image signal transmitted from a second image transmitting unit, synthesizes the first and second image signals, and displays them on the same display screen. The image receiving unit transmits information about display areas of the first and second image signals, i.e., image plane setting information, to each image transmitting unit. In accordance with the image plane setting information, each image transmitting unit reduces the data amount of a display area the first and second image signals are displayed in an overlap manner, prior to transmitting the first and second image signals. Also in accordance with the image plane setting information, each image transmitting unit processes the first or second image signals so as to match a display area thereof, prior to transmitting the first and second image signals.

Image transmission apparatus and method and image transmission system

An image pickup system comprising an image pickup device including an image pickup element for pickup the image of an object and outputting image data, a compression encoding circuit for effecting compression encoding of the image data, a wireless transmission circuit for modulating the compression encoded image data and transmitting the data to a wireless transmission channel, and a first connector adapted to be electrically and mechanically connected, in detachable manner, to a display device for displaying the image picked-up by the image pickup element and to transmit the image data from the image pickup element; and a display device including a wireless reception circuit for receiving the transmitted image data from the wireless transmission channel and demodulating the image data, an expansion circuit for expanding the demodulated image data to obtain first image data, a second connector adapted to be electrically and mechanically connected, in a detachable manner, to the first connector and to receive second image data from the image pickup device, a signal processing circuit for selectively receiving the first or second image data and processing the received image data to output an image signal of a predetermined format, and a monitor for displaying the image signal of the predetermined format.

Image pickup system with separable/attachable image pickup device and

A communication apparatus is disclosed which allocates the respective bits indicating multilevel image data to different spread codes, and then spreads the bits by the use of the spread codes, thereby achieving code division multiplex communication. Image data consisting of 8 bits is transmitted and received at one time by the use of 8 or greater number of spreads codes. In the transmitting end, the amounts of the 8-bit luminance data and the 8-bit color difference data are halved along the time axis, and the resulting respective data are line-sequential multiplexed. Thus, among 12 fields, one field is transmitted according to the above-described code division multiplex method. In the receiving end, the receiving signal which has been code division multiplexed in the transmitting end is demodulated by de-spreading using a plurality of spread codes. The de-spread signal is stored in a memory and image data for one field is repeatedly read from the memory during 12 fields. Then, the luminance signal and the color difference signal are line-sequential separated from the read image data and are output.

Code division multiplex communication apparatus

In an image pickup apparatus having an electronic zooming function for enlarging and interpolating an image by electronic image processing of an image pickup signal output from an image pickup device, a focus is detected by extracting a predetermined focal signal varying depending upon a focal state from the image pickup signal before the image pickup signal undergoes enlargement/interpolation processing by electronic zooming.

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Machida, Japan

Motoi Tariki