Digital camera

• US 20040239795A1
• Filed: 03/10/2004
• Published: 12/02/2004
• Est. Priority Date: 03/20/2003
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Kitajima, Tatsutoshi
• Granted Patent: US 7,692,715 B2
• Time in Patent Office: Days
• US Class Current: 348/362
• CPC Class Codes: H04N 23/63 by using electronic viewfinders
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6811 based on the image signal
• CPC Class Codes: H04N 23/684 performed by controlling the image sensor readout, e.g. by controlling the integration time
• CPC Class Codes: H04N 23/73 by influencing the exposure time
• CPC Class Codes: H04N 23/74 by influencing the scene brightness using illuminating means

Abstract

A digital camera according to the present invention includes a device to set up a plurality of exposure conditions, a device to obtain a plurality of imaging data imaged in accordance with the plurality of exposure conditions set by the plurality exposure conditions set up device, and a device to compare a sharpness based on the plurality of imaging data obtained by the plurality of imaging data obtaining device, and a shake of the camera or a blur of a subject is determined corresponding to the comparison result of the sharpness comparison device.

Claims

1. A digital camera having an image forming device to image a subject by a setup exposure condition and a digital image processing device to convert imaging data from the image forming device into a digital image, the digital camera comprising:

a device to set up a plurality of the exposure conditions,

a device to obtain a plurality of imaging data imaged in accordance with the plurality of exposure conditions set by the plurality exposure conditions setup device, and

a device to compare a sharpness based on the plurality of imaging data obtained by the plurality of imaging data obtaining device,

wherein a shake of the camera or a blur of the subject is determined corresponding to the comparison result of the sharpness comparison device.

2. The digital camera according to claim 1, further comprising:

a device to output an exposure time for preventing a handshake based on a focal length of a photographic lens in the image forming device,

wherein an existence of the camera shake is determined based on the handshake preventing exposure time output by the handshake preventing exposure time output device.

3. The digital camera according to claim 2, further comprising:

a device to warn of the camera shake when the camera shake is existed.

4. The digital camera according to claim 2, wherein when the camera shake is existed, a predetermined exposure time while functioning a still image recording is shortened, and when the exposure is not enough, a strobe is flashed.

5. The digital camera according to claim 2, wherein when the subject blur is existed, a sensitivity for increasing the output of the imaging data while functioning the still image recording is increased.

6. The digital camera according to claim 1, further comprising:

a device to display an image processed by the digital image processing device,

wherein a display time to the display device is made constant regardless of the exposure time in the image forming device.

7. The digital camera according to claim 2, further comprising:

a device to display an image processed by the digital image processing device,

wherein a display time to the display device is made constant regardless of the exposure time in the image forming device.

8. The digital camera according to claim 3, further comprising:

a device to display an image processed by the digital image processing device,

wherein a display time to the display device is made constant regardless of the exposure time in the image forming device.

9. The digital camera according to claim 4, further comprising:

a device to display an image processed by the digital image processing device,

wherein a display time to the display device is made constant regardless of the exposure time in the image forming device.

10. The digital camera according to claim 5, further comprising:

a device to display an image processed by the digital image processing device,

wherein a display time to the display device is made constant regardless of the exposure time in the image forming device.