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Camera

A technology of camera, focus adjustment, applied in the field of focus

Inactive Publication Date: 2006-06-21
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the technologies disclosed in these gazettes all use imager information to automatically switch the compression rate, instead of effectively using a plurality of different AF methods separately.

Method used

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Experimental program
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Embodiment Construction

[0035] Embodiments of the present invention will be described below with reference to the drawings.

[0036] First, refer to Figure 1 to Figure 9 , the first embodiment of the present invention will be described.

[0037] figure 1It is a schematic diagram of the first embodiment of the present invention, and is a block diagram showing the basic configuration of an AF camera.

[0038] The light from the main subject 1 is imaged on an imaging element 4 such as a CCD through a photographic lens 3 . Furthermore, the image signal photoelectrically converted by the imaging element 4 is output to the image processing unit 6 through the A / D converter 5 . The signal processed by the image processing unit 6 is supplied to the CPU 7 . The CPU 7 is an arithmetic control unit, which is composed of a microcontroller for controlling the overall sequence of the camera, and has a release switch 7a and a compression rate setting switch 7b which will be described later. The CPU 7 controls ...

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Abstract

The present invention provides a camera which can perform high-speed photography by combining an optimal AF method and a compression method according to the photographer's intention, and can effectively use the capacity of a storage medium. The focus position of the photographic lens (3) is adjusted by the CPU (7) as a first focus adjustment, and is adjusted by a high-speed second focus adjustment that is less accurate than the first focus adjustment. The subject image is captured by the imaging element (4) through the photographing lens (3), and the output signal of the imaging element (4) is converted into image data. A compression rate of image data obtained by the imaging element (4) is set in an image processing unit (6), and the image data is compressed according to the set compression rate. Furthermore, according to the compression rate set by the image processing unit (6), the CPU (7) determines which of the first focus adjustment and the second focus adjustment is used to perform the final focus of the photographic lens (3). Adjust the action.

Description

technical field [0001] The present invention relates to focusing technology of an electronic camera, in particular to a camera capable of switching the focusing method among cameras capable of changing the compression rate when storing electronic images. Background technique [0002] In the focus technology of electronic cameras, the so-called mountain-climbing method imager AF (automatic focus) method using an imaging element for photography without using a special sensor is often used. [0003] However, the imager AF must monitor how the contrast of the subject image on the imaging element changes depending on the focus position of the photographing lens, and in many cases, the time lag when the shutter is released poses a problem. [0004] Therefore, attempts are being made to improve focusing by equipping different ways of focusing. [0005] On the other hand, various improvements have also been made to image compression, and the applicant, for example, has proposed app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225G03B13/00G02B7/30G03B13/36G02B7/28G02B7/34G02B7/36H04N5/232H04N5/91H04N101/00
Inventor 野中修井出昌孝
Owner OLYMPUS CORP