Camera system and image forming apparatus

A camera and imaging device technology, applied in the field of imaging equipment

Inactive Publication Date: 2011-05-11
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various examples are described below

Method used

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  • Camera system and image forming apparatus
  • Camera system and image forming apparatus
  • Camera system and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0093] refer to Figure 4 Turning to FIG. 8 , a method of calculating a position of the focusing lens 104 at which the contrast of an object image is maximized according to an embodiment of the present invention will be described.

[0094] Figure 4 Scan lines in region e8 according to an embodiment of the invention are shown.

[0095] Regarding the area e8, that is, located at image 3 An AF area in the center of a plurality of AF areas on the shooting screen, an area e8 includes a plurality of scan lines AFareaL8[1] to AFareaL8[a]. According to the present embodiment, a case where AF detection is performed on the area e8 is exemplified.

[0096] Lens operation

[0097] Figure 5 is a timing chart of the AF operation of the lens 100 according to the embodiment of the present invention.

[0098] The lens controller 110 having a timer function resets the first timer 111 according to a command from the camera controller 209 so that the first timer 111 has the same time r...

no. 2 example

[0129] refer to Figure 9 to Figure 1 2. A method of calculating the position of the focusing lens 104 according to an embodiment of the present invention will be described.

[0130] Figure 9 Scan lines in the region e15 according to an embodiment of the present invention are shown.

[0131] Regarding area e15, that is, located in image 3 The AF area of ​​the lower right part of the multiple AF areas of the shooting screen, the area e15 includes a plurality of scan lines AFareaL15[1] to AFareaL15[a]. According to the present embodiment, a case where AF detection is performed on the area e15 is shown as an example.

[0132] Lens operation

[0133] Figure 10 is a timing chart of the AF operation of the lens 100 according to the embodiment of the present invention.

[0134] The lens controller 110 receives time measurement period information from the camera controller 209, and sets the time measurement period of the first timer 111 according to the time measurement per...

no. 3 example

[0161] refer to Figure 13 to Figure 1 5. A method of calculating the position of the focusing lens 104 according to another embodiment of the present invention will be described. According to the present embodiment, a time period between a plurality of time points of intermediate time points of AF detection in the AF area is used as a time measurement period for sharing information in the main body unit 200 and the lens 100 . and image 3 As in the case of , AF detection is performed with respect to the area e8 (ie, the AF area located at the center of the plurality of AF areas on the shooting screen).

[0162] The second timer 228 included in the camera controller 209 operates as a predetermined base clock, and has timing information on time periods between a plurality of time points of intermediate time points of AF detection in the AF area. However, the camera controller 209 does not continuously transmit timing information to the lens 100, but transmits fps information ...

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Abstract

A camera system includes a replaceable lens and a body unit in which the replaceable lens is installed, and an image forming apparatus, in which a timer included in a lens controller is reset according to an instruction from a camera controller so that the replaceable lens is synchronized with the body unit, and focus is adjusted using location information detected by the replaceable lens and a focus estimation value calculated by the body unit.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2009-0107515 filed with the Korean Intellectual Property Office on November 9, 2009, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a camera system including an interchangeable lens and an imaging device. Background technique [0003] Camera systems that include interchangeable lenses can use a contrast autofocus (AF) method to adjust focus. The contrast AF method may include the steps of detecting an AF evaluation value related to an image signal generated by an imaging device, detecting a focus point from the AF evaluation value, and then driving a focus lens. [0004] Specifically, in the contrast AF method, the time point at which the imaging device captures an image corresponds to the lens position. In addition, the point in time at which the AF estimated value is maximized is detected from the change in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G03B13/36G03B17/14
CPCG03B13/36G03B17/14H04N23/663H04N23/673
Inventor 浜田正隆
Owner SAMSUNG ELECTRONICS CO LTD
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