Electronic digital still camera for separately storing component video signals in memory

• US 4,914,746 A
• Filed: 04/29/1988
• Issued: 04/03/1990
• Est. Priority Date: 05/01/1987
• Status: Expired due to Term

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Watanabe, Mikio, Nishi, Seiki
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): Powell, Mark R.
• Application Number:
  US07/188,403
• Time in Patent Office: 704 Days
• Field of Search: 358/41, 358/43, 358/44, 358/909, 358/906, 358/310, 358/334, 358/335
• US Class Current: 386/302
• CPC Class Codes: H04N 1/2112 using still video cameras
• CPC Class Codes: H04N 1/2158 using a detachable storage unit
• CPC Class Codes: H04N 1/646 Transmitting or storing colour television type signals, e.g. PAL, Lab; Their conversion into additive or subtractive colour signals or vice versa therefor H04N1/642, H04N1/644 take precedence
• CPC Class Codes: H04N 2101/00 Still video cameras
• CPC Class Codes: H04N 2201/0077 Types of the still picture apparatus
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 9/81 the individual colour picture signal components being recorded sequentially only
• CPC Class Codes: Y10S 358/906 Hand-held camera with recorder in a single unit

Abstract

A digital electronic still camera to which detachably connected is a semiconductor memory module adapted for storage of video signals representing a still image in the form of digital data. The camera includes a connector for detachably and electrically connecting the semiconductor memory module, an imaging subsystem including an image pickup device and adapted for imaging a scene and producing video signals representative of the scene in a dot-sequential manner, a signal processor for converting the video signals produced from the imaging device into component signals and developing the component signals in the form of digital signals, and a control unit for controlling the imaging subsystem and the signal processor to cause the imaging subsystem to shoot the scene, the control unit causing the signal processor to convert the resulting video signals into the component video signals. The control unit supplies control signals to the connector for writing the component signals into the semiconductor memory module.

Claims

1. A digital electronic still camera device to which a semiconductor memory module adapted to store digital data therein is detachably connected, comprising:

connecting means for detachably and electrically connecting said semiconductor memory module to said camera;

imaging means including a color imaging device having a color filter for imaging a scene through the color filter and producing video signals representative of a scene in the form of image signals associated with filter segments of the color filter;

signal processing means for converting the video signals produced by said imaging means into color component signals and delivering the color component signals to said connecting means in the form of digital signals; and

control means for controlling said imaging means to image the scene, and for controlling said signal processing means to convert the resultant video signals into the color components signals;

said signal processing means comprising color separator means for receiving the video signals produced from said imaging means and for separating the video signals into the color component signals associated with the video signals, producing the color component signals in parallel to each other;

said control means supplying to said connector means, control signals allowing the color component signals to be stored in said semiconductor memory module independently of each other.

2. A device, as claimed in claim 1, further comprising storage means for storing said color component signals, independently of each other, in said semiconductor memory module.

3. A digital electronic still camera in accordance with claim 1 wherein said signal processing means includes a matrix circuit for forming luminance and chrominance signals as the component signals.

4. A digital electronic still camera in accordance with claim 3 wherein said signal processing means includes line sequencing means for alternately supplying the chrominance signals to said connecting means in a horizontal-scanning-line-sequential manner.

5. A digital electronic still camera in accordance with claim 1 wherein said signal processing means produces three primary color signals as the component signals.

6. A digital electronic still camera in accordance with claim 1 wherein said signal processing means includes:

signal converting means for converting the video signals produced by said imaging means into corresponding digital data; and

digital signal processing means for receiving the digital data developed from said signal converting means and processing said digital data for white balance adjustment and gamma correction.

7. A digital electronic still camera in accordance with claim 1 wherein said signal processing means includes:

analog signal processing means for receiving video signals produced from said imaging means and processing the video signals for white balance adjustment and gamma correction; and

signal converting means for converting the video signals produced from said analog signal processing means into corresponding digital data and supplying the digital data to said connecting means.

8. A device, as claimed in claim 1, wherein said video signals representative of a scene are in the form of dot-sequential multicolor signals.

9. A method of storing digital data in a detachably connected semiconductor memory module of a digital electronic still camera, comprising the steps of:

detachably and electrically connecting said semiconductor memory module to said camera by use of a connecting means;

detachably and electrically connected said semiconductor memory module to said camera by use of a connecting means;

imaging a scene through a color filter of said digital electronic still camera and producing video signals representative of the scene in the form of dot-sequential, color-separated image signals associated with filter segments of the color filter;

separating said video signals into color component signals associated with the video signals, said color component signals being produced in parallel with each other;

delivering the color component signals to said connecting means in the form of digital signals; and

storing said color component signals, independent of each other, in said detachably connected semiconductor memory.

10. A method, as claimed in claim 9, further comprising the steps of:

converting the separated video signals into corresponding digital data; and

digital data and processing said digital data for white balance adjustment and gamma correction.

11. A method, as claimed in claim 9, further comprising the steps of:

receiving said separated video signals and processing the video signals for white balance adjustment and gamma correction; and

converting the processed video signals into corresponding digital data prior to supplying the digital data to said connecting means.