Facsimile and static presentation processing – Hand-held camera with recorder in a single unit
Patent
1995-04-20
1998-03-17
Tran, Thai
Facsimile and static presentation processing
Hand-held camera with recorder in a single unit
386117, 386 46, H04N 576
Patent
active
057293635
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an imaging parameter recording apparatus, an imaging method and an editing system advantageously employed for an integrated system for imaging and editing an object. More particularly, it relates to an imaging parameter recording apparatus, an imaging method and an editing system for re-generating the picture pattern at the time of past imaging, correcting the picture pattern to a desirable pattern and unifying the picture pattern of the reproduced picture by recording imaging conditions at the time of imaging and imaging signals of the object and by enabling the imaging parameters to be unified to desirable imaging parameter values.
BACKGROUND ART
Nowadays, a video camera apparatus is known, in which the imaging light is received by a so-called CCD image sensor for forming imaging signals which imaging signals are recorded on a video tape.
With such video camera apparatus, the focusing, zooming or the iris is manually set by a user prior to starting the imaging. When the imaging is started, the imaging light is introduced via the imaging lens so as to be received by the CCD image sensor. Thus the electrical charges corresponding to the received imaging light are accumulated in the CCD image sensor.
The system controller reads out the charges accumulated in the CCD image sensor under so-called electronic shutter control at a time interval specified by a manual operation or in response to the received light volume. The electrical charges read out from the CCD image sensor are outputted as imaging signals so as to be fed to a preamplifier.
The preamplifier amplifies the imaging signals at a pre-set gain and transmits the amplified signals to a video amplification circuit (video amplifier).
The video amplifier has its gain, flare correction degree and shading correction degree controlled by control signals from the system controller. Thus the video amplifier performs flare correction and shading correction on the imaging signals and amplifies the corrected signals with a gain variably controlled by the system controller in order to output the amplified signals. The amplified imaging signals from the video amplifier are supplied to an imaging signal processing circuit.
The imaging signal processing circuit clamps the pedestal level (black level) of the imaging signals and processes the imaging signals with gamma correction and contour enhancement, while affording knee characteristics to the processed imaging signals, under control by the system controller, and transmits the resulting imaging signals to an encoder. The encoder digitizes the imaging signals to produce imaging data and encodes the imaging data in a pre-set manner suited to recording in order to output the resulting encoded data. The time code indicating the imaging time and date is superimposed on the imaging data and the resulting data is supplied to a rotary head.
The rotary head digitally azimuth-records the imaging data and the time code on a video tape.
This allows the imaging data and the time code to be reproduced during reproduction so that the imaging data and time by the time code may be displayed on a screen along with the picture corresponding to the imaging data.
In a broadcasting station, it becomes frequently desirable to select a desired picture to be used in a program from among plural images recorded on plural video tapes and to edit the images in their entirety on a single video tape.
However, since the desired selected images were directly joined to one another with the conventional editing, such that the pictures of the same picture pattern produce difference in the display mode at a junction between the images to give the alien feeling to the viewer.
That is, since the plural video tapes are made up of images taken at different places and at different timing, such that, when the pictures, such as the pictures of the sky, imaged under geographically or temporally different conditions and joined to each other by editing, produce an inconvenience such as sudden changes in brightness
REFERENCES:
patent: 5262867 (1993-11-01), Kojima
patent: 5274457 (1993-12-01), Kobayashi et al.
patent: 5392068 (1995-02-01), Suzuki et al.
patent: 5543925 (1996-08-01), Timmermans
Aihara Kenichi
Chiba Yoshio
Kihara Taku
Frommer William S.
Nguyen Huy
Sony Corporation
Tran Thai
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