Image pickup device and chromatic aberration correction method

• US 20050168614A1
• Filed: 03/05/2003
• Published: 08/04/2005
• Est. Priority Date: 03/05/2002
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Okada, Miyuki, Nakajima, Ken
• Granted Patent: US 7,397,499 B2
• Time in Patent Office: Days
• US Class Current: 348/335
• CPC Class Codes: H04N 23/60 Control of cameras or camera modules
• 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 23/6812 based on additional sensors, e.g. acceleration sensors
• CPC Class Codes: H04N 23/683 performed by a processor, e.g. controlling the readout of an image memory
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position
• CPC Class Codes: H04N 25/611 Correction of chromatic aberration
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/907 using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal

Abstract

A picture taking apparatus and a chromatic aberration correcting method are provided in which a satisfactory correction processing can be performed even when the camera shake correction is simultaneously performed.
An output signal from a camera-signal processing circuit 4 is selected by a selector switch 5 and is supplied to a chromatic aberration correcting unit 6. On the other hand, an angular velocity due to the camera shake is detected using sensors 7P, 7Y and the detected signal is supplied to a camera shake correcting vector calculating unit 9 in control microcomputer 8. A driving state of a camera lens 1 such as a zoom focal length and focal position is supplied to a conversion-ratio calculating unit 10. An optical axis centered shift vector of camera lens 1 is obtained from the camera shake correcting vector and is supplied to the above unit 6. A conversion ratio of each color is supplied to the above unit 6. A signal corrected by the above 6 is compressed by data compression circuit 15 and supplied to a recording medium of a recording and reproducing unit 17 for recording. A signal reproduced therefrom is decompressed by a data expansion circuit 18 and supplied to the selector switch 5. Accordingly the picture-quality deterioration caused in the miniaturized camera lens can be compensated by processing the captured image signal, and also a satisfactory correction processing can be performed even when the camera shake correction is performed simultaneously.

Claims

1. A picture taking apparatus comprising:

a camera lens,

image pickup means for converting image light passing through said camera lens into an electric image signal,

camera-signal processing means for processing said image signal,

chromatic signal converting means for converting an output signal from said camera-signal processing means into at least three primary color signals or vice versa,

resolution changing means for enlarging or reducing a picture of each color of said primary color signals,

detection means for detecting a driving state of said camera lens and an amount of camera shake correction, and

control means for controlling a changing coefficient of enlargement or reduction and an optical axis centered coordinate used in said resolution changing means depending on a detected output from said detection means.

2. A picture taking apparatus according to claim 1, further comprising:

signal conversion means for converting an output signal from said resolution changing means into an image signal for outputting to the outside or for recording, or vice versa,

outside outputting means for outputting said image signal to be output to the outside, and/or recording and reproducing means for recording said image signal to be recorded in a recording medium or reproducing the same signal from the recording medium.

3. A picture taking apparatus according to claim 2, wherein

the output signal from said camera-signal processing means is recorded in said recording medium by said recording and reproducing means, and

information on the driving state of said camera lens and the amount of camera shake correction that are detected by said detection means when taking a picture is recorded in said recording medium together with the output signal from said camera-signal processing means.

4. A picture taking apparatus according to claim 1, further comprising:

selector switch means for switching between the output signal from said camera-signal processing means, and an image signal from arbitrary external input means or recording and reproducing means, wherein

a signal from said selector switch means is supplied to said chromatic signal converting means, and

a user interface for arbitrarily setting said conversion coefficient of enlarging or reducing and said optical axis centered coordinate is provided in said control means.

5. A picture taking apparatus according to claim 4, wherein

information on the driving state of said camera lens and the amount of camera shake correction that are detected by said detection means when taking a picture is recorded in the recording medium reproduced by said recording and reproducing means together with said image signal, and

the conversion coefficient of enlargement or reduction and the optical axis centered coordinate used in said resolution changing means are controlled depending on said information reproduced by said recording and reproducing means.

6. A chromatic aberration correcting method in a picture taking apparatus comprising:

a camera lens, image pickup means for converting image light passing through said camera lens into an electric image signal, and camera-signal processing means for processing said image signal, wherein

an output signal from said camera-signal processing means is converted into at least three primary color signals,

a picture of each color of said primary color signals is enlarged or reduced, and

a driving state of said camera lens and an amount of camera shake correction are detected to control a conversion coefficient of said enlargement or reduction and an optical axis centered coordinate depending on the detected output.

7. A chromatic aberration correcting method according to claim 6, wherein

an output signal from said resolution changing means is converted into an output signal to be output to the outside or an image signal to be recorded, and

said image signal to be output to the outside is output and/or said image signal to be recorded is recorded in a recording medium.

8. A chromatic aberration correcting method according to claim 7, wherein

an output signal from said camera-signal processing means is recorded in said recording medium, and

information on the driving state of said camera lens and the amount of camera shake correction that are detected when taking the picture is recorded in said recording medium together with said output signal.

9. A chromatic aberration correcting method according to claim 6, further comprising:

selector switch means for switching between the output signal from said camera-signal processing means, and an image signal from an arbitrary external input or recording medium, wherein

a signal from said selector switch means is converted into at least three primary color signals,

the picture of each color of said primary color signals is enlarged or reduced, and

said conversion coefficient of enlargement or reduction and said optical axis centered coordinate are arbitrarily set.

10. A chromatic aberration correcting method according to claim 9, wherein

the information on the driving state of said camera lens and the amount of camera shake correction that are detected when capturing an image signal is recorded in said recording medium together with said image signal, and

said conversion coefficient of the enlargement or reduction and said optical axis centered coordinate are controlled depending on said information reproduced.