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Image sensing apparatus

A technology of a camera device and a camera element, which is applied in the directions of image communication, picture signal generator, color signal processing circuit, etc., can solve the problems of not taking into account the accuracy and the optical characteristics of the micro-lens, etc., so as to improve the adjustment accuracy. Effect

Inactive Publication Date: 2011-04-20
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the technique described in Patent Document 1, no consideration is given to variations in the manufacturing of the imaging element and the optical characteristics of the microlenses arranged for each pixel.
For example, in cases where imaging elements with different optical characteristics can be used, no consideration is given to how the optical characteristics of the photographic lens affect the accuracy of the white balance adjustment

Method used

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no. 1 Embodiment approach

[0039] First, a configuration of an imaging device according to a first embodiment of the present invention will be described with reference to FIG. 1 .

[0040] Here, as an example of the imaging device, a camera system in which an interchangeable imaging lens (hereinafter referred to as an interchangeable lens) is combined with a camera body will be described as an example.

[0041] As shown in FIG. 1, the camera system as the imaging device according to the first embodiment of the present invention includes: a lens module 1, a camera module 2, a RAM 3, an image signal processing circuit 4, a microcomputer (hereinafter referred to as a microcomputer) 5, and a ROM 6. , EEPROM7, mode setting switch 8, storage medium 9, etc. The lens module 1 is disposed on the side of the interchangeable lens, and other components are disposed on the side of the camera body to which the interchangeable lens can be mounted. The lens module 1 and the camera module 2 can be freely attached or de...

no. 2 Embodiment approach

[0114] In the imaging device according to the second embodiment of the present invention, the installation equipment has Figure 9 Correspondence table of WB correction coefficient and its characteristics to replace the CCD camera module equipped with the above Figure 6 The WB correction coefficient correspondence table and its characteristics for the case of the CCD camera module will be described. As the CCD of this imaging module, a CCD having a narrower interval between adjacent pixels than the imaging element 2a (hereinafter referred to as a narrow-pitch module) is used.

[0115] Here, as shown in FIG. 1 , the camera module and the lens module are electrically connected through the communication unit 1d. In addition, the camera module is electrically connected to the microcomputer and ROM 3 of the camera device through the communication unit 10 . An example of the communication unit 1d and the communication unit 10 is that the camera module can be detached by being con...

no. 3 Embodiment approach

[0123] In the imaging device according to the third embodiment of the present invention, the installation equipment has Figure 10 The WB correction coefficient correspondence table and its characteristics of the lens module of the zoom lens (hereinafter referred to as the zoom lens module) to replace the above Figure 5 The case of the WB correction coefficient correspondence table will be described.

[0124] Here, as shown in FIG. 1 , the camera module and the zoom lens module are electrically connected through the communication unit 1d. This communication part 1d is detachable by being comprised as a connector like 2nd Embodiment.

[0125] In the imaging device according to the third embodiment of the present invention, as the first table, Figure 10 Correspondence table of WB correction coefficients, and as the second table Figure 6 The WB correction coefficient correspondence table is used to calculate the digital gain, and the signal of each color is amplified accord...

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Abstract

An image sensing apparatus according to one mode of the present invention enhances precision of WB adjustment to thereby obtain an image having an appropriate WB, and comprises an image signal processing circuit which adjusts the WB with respect to an image signal output from an image sensing element based on a WB gain, a ROM which stores at least a WB correction coefficient correspondence table,and a WB modification coefficient correspondence table, and a microcomputer which calculates a WB correction coefficient corresponding to a diaphragm value, and a WB modification coefficient based onthe correspondence tables and which multiplies the WB gain by the WB correction coefficient and WB modification coefficient to thereby obtain a value as a digital gain and which executes a control insuch a manner as to adjust the WB based on the digital gain.

Description

technical field [0001] The present invention relates to a technique for adjusting the white balance of an imaging device having an imaging element. Background technique [0002] [Patent Document 1] JP-A-2000-244930 [0003] In the past, such as Figure 11 As shown, in order to increase the condensing efficiency of each pixel, many imaging elements have a microlens 100, a color filter 101, etc. per pixel, but the refractive index of the microlens 100 depends on the wavelength of incident light (wavelength dependence) . [0004] In particular, if the Figure 11 As shown, when light is incident from an oblique direction on the microlens 100, the above-mentioned wavelength dependence is significant, and light of a wavelength that is not collected on the light receiving portion 102 occurs (oblique incidence characteristic). Therefore, when the incident angle of light incident on the imaging element changes due to the diaphragm of the photographing lens or the like, poor white b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/04H04N9/73
CPCH04N9/735H04N23/88
Inventor 丰田哲也
Owner OLYMPUS CORP