Electronic still camera with various modes of data compression
First Claim
Patent Images
1. An electronic still camera adapted to store an image in an semiconductor memory card, comprising:
- imaging means for photoelectrically converting an image into an image signal representative thereof and including a solid state imaging device and optical color filter of different colors with different spectral characteristics arranged on said solid state imaging device;
signal conversion means for converting the image signal supplied from said imaging means into a luminance signal and two color difference signals and for converting the luminance signal and the two color difference signals into different amounts of image information according to one of a plurality of different data processing modes for different image qualities, the signal conversion means including mode select means for selecting one of the plurality of different modes; and
recording means for storing image information including the luminance signal and two color difference signals into the semiconductor memory card.
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Abstract
An electronic still camera includes an imaging device, a signal conversion device and a recording device. The imaging device includes a solid state imaging unit and optical color filters of different spectral characteristics arranged on the solid state imaging unit to convert photoelectrically converting the photographed image. The signal conversion device converts a signal from the imaging device into a luminance signal and two color difference signals. The recording device stores image information including the luminance signal and two color difference signals into a semiconductor memory card.
229 Citations
24 Claims
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1. An electronic still camera adapted to store an image in an semiconductor memory card, comprising:
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imaging means for photoelectrically converting an image into an image signal representative thereof and including a solid state imaging device and optical color filter of different colors with different spectral characteristics arranged on said solid state imaging device; signal conversion means for converting the image signal supplied from said imaging means into a luminance signal and two color difference signals and for converting the luminance signal and the two color difference signals into different amounts of image information according to one of a plurality of different data processing modes for different image qualities, the signal conversion means including mode select means for selecting one of the plurality of different modes; and recording means for storing image information including the luminance signal and two color difference signals into the semiconductor memory card. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image recording method of an electronic still camera for coding an image signal and storing the coded signal into a semiconductor memory card in a digital form comprising:
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a first signal conversion step for converting the image signal into a luminance signal and two color difference signals; a second signal conversion step for converting the luminance signal and two color difference signals into different amounts of image information according to a selected one of a plurality of different data processing modes to select different image qualities; and a recording step of recording the image information including the luminance signal and two color difference signals into said semiconductor memory card. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A reproducing device for reading out image data of a memory cared for storing image data obtained by coding image information including a luminance signal and two color difference signals in accordance with a selected one of a plurality of different data processing modes which each convert the image data into different amounts of information, said memory card being divided into a plurality of blocks each having a preset capacity, comprising:
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readout means for reading out preset image data from said memory card; mode determination means for determining a mode for the readout of the image data; and signal processing means for restoring the image into original image information according to the mode, and for deriving an image displaying signal from the image information. - View Dependent Claims (24)
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Specification