Camera provided with tremble correcting function

• US 20050212917A1
• Filed: 03/24/2005
• Published: 09/29/2005
• Est. Priority Date: 03/29/2004
• Status: Active Grant

• Current Assignee: PENTAX RICOH IMAGING COMPANY, LTD.
• Original Assignee: Pentax Corporation (Hoya Corporation)
• Inventors: Kakiuchi, Shinichi
• Granted Patent: US 7,525,573 B2
• Time in Patent Office: Days
• US Class Current: 348/208.200
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

Rotations of a camera around two axes are detected by two gyro sensors. A color temperature of a photographing location is detected by an AWB sensor. One of a plurality of low-pass filters, the cut-off frequency component of which is different, can be connected to one gyro sensor. The low-pass filter which is connected to the gyro sensor, is changed by a transfer switch based on the output result of the AWB sensor, so that a frequency range which is retrieved from the output voltage of the gyro sensor is controlled. With respect to another gyro sensor, a similar operation is carried out. A hand-tremble correcting circuit calculates a driving amount of an image sensor, by which the tremble is canceled, based on the output voltages of the gyro sensors in which a predetermined frequency range was retrieved in accordance with the condition of the photographing location.

Claims

1. A camera provided with tremble correcting function comprising:

a detector that detects a tremble of a camera;

a measuring device that measures a color temperature of an object;

an adjusting controller that adjusts an output result of said detector based on an output of said measuring device;

a canceling controller that cancels an image tremble based on said output result of said detector which was adjusted by said adjusting controller.

2. A camera according to claim 1, wherein said adjusting controller retrieves signal components in a predetermined frequency range from said output result, based on said color temperature measured by said measuring device.

3. A camera according to claim 2, wherein:

said adjusting controller retrieves signal components in a high frequency range, a middle frequency range, and a low frequency range in said predetermined frequency range, from said output result, when said output of said measuring device indicates that the photographing was carried out in fine weather;

said adjusting controller retrieves signal components in said middle and low frequency ranges from said output result, when said output of said measuring device indicates that the photographing was carried out in cloudy weather; and

said adjusting controller retrieves signal components in said low frequency range from said output result, when said output of said measuring device indicates that the photographing was carried out indoors.

4. A camera according to claim 3, wherein said predetermined frequency range corresponds to a general frequency of a hand tremble,

said high frequency range corresponds to a high range of in said general frequency,

said middle frequency range corresponds to a middle range of said general frequency, and

said low frequency range corresponds to a low range of said general frequency.

5. A camera according to claim 3, wherein said detector is a gyro sensor, and

said adjusting controller includes:

a plurality of low-pass filters, the cut-off frequencies of which are different; and

a transfer switch that changes a connection between said plurality of low-pass filters and said gyro sensor.

6. A camera according to claim 1, wherein said cancel controller cancels said image tremble by driving an image sensor.

7. A camera according to claim 1 comprising a correcting optical system which is included in a photographing optical system, and

said canceling controller cancels said image tremble by moving said correcting optical system.

8. A camera provided with tremble correcting function, comprising:

a detector that detects a tremble of a camera;

an adjusting controller that adjusts an output result of said detector; and

a canceling controller that cancels said image tremble based on said output result of said detector which was adjusted by said adjusting device;

wherein said adjusting controller retrieves a predetermined frequency range from said output result based on the range of combinations of a shutter speed and an aperture value.

9. A camera according to claim 8, wherein said predetermined frequency range corresponds to a general frequency of a hand tremble.