Image device

A technology of a camera device and a camera unit, which is applied in the field of hand shake correction technology and can solve the problems of conspicuous noise components and the like

Inactive Publication Date: 2009-05-27
SHARP KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] Furthermore, in a certain dark low-illuminance environment, in order to compensate for the underexposure of the second image due to the short exposure time, when compositing with gain amplification implemented, even in a certain dark low-illuminance environment In the environment, increasing the synthesis ratio using the first image suppresses the noise, and there is also a disadvantage that the noise component is conspicuous in the dark part where the light does not reach the subject sufficiently

Method used

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Embodiment approach 1

[0064] (Embodiment 1: Outline) This embodiment relates to an imaging device for determining whether to perform hand-shake correction synthesis in accordance with illuminance conditions, and to perform hand-shake correction synthesis using a plurality of images captured under different imaging conditions Synthesize images without hand shake.

[0065] (Embodiment 1: Configuration) Functional blocks of an imaging device according to this embodiment are illustrated in FIGS. 1 and 2 . The imaging device (0100) illustrated in FIG. 1 includes an "imaging unit" (0101), a "control unit" (0102), an "image information storage unit" (0103), and a "synthesis unit" (0104).

[0066] In addition, as shown in FIG. 2, the imaging device (0200) has an "imaging unit" (0201), a "control unit" (0202), an "image information storage unit" (0203), and a "synthesis unit" (0204), Furthermore, the control unit (0202) may have "first control means" (0206) and "second control means" (0207).

[0067] In a...

Embodiment approach 2

[0106] (Embodiment 2: Outline) The present embodiment relates to an imaging device that synthesizes an image without hand shake using a plurality of images captured under different imaging conditions. It is possible to obtain a hand-shake corrected image in which noise is suppressed without a large change in image quality under a slight change in illuminance environment.

[0107] (Embodiment 2: Configuration) FIG. 8 illustrates functional blocks of an imaging device according to this embodiment. The configuration of the imaging device according to this embodiment is a configuration in which "first combining ratio variable combining means" (0808) is added to the configuration of the imaging device shown in FIGS. 1 and 2 described in the first embodiment. FIG. 8 exemplifies a configuration in which the first combining ratio variable combining means (0808) is added to the configuration of the imaging device explained in FIG. 2 . The imaging device (0800) includes an "imaging uni...

Embodiment approach 3

[0126] (Embodiment 3: Outline) This embodiment relates to an imaging device in which gain amplification is applied in order to compensate underexposure of the second image due to shortened exposure time in a somewhat dark low-light environment. In the case of compositing, in the dark part where the light does not reach the subject sufficiently, it is possible to perform compositing that uses an image with less noise to further increase the weight, so that the dark part where the light does not reach the subject sufficiently is suppressed. image with good quality without noise.

[0127] (Embodiment 3: Configuration) The functional blocks of the imaging device of this embodiment are illustrated in FIG. 10 . The configuration of the imaging device of this embodiment is a configuration in which "brightness information acquisition means" (1008) and "second synthesis ratio variable synthesis means" (1009) are added to the configuration of the imaging device described in Embodiment 1...

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Abstract

Conventionally, when generating an image in which hand-shake is suppressed, by combining a plurality of images, an image quality may be degraded by performing a combination process even in the illuminance condition when no hand-shake occurs and the linear characteristic of luminance information may be deteriorated when combining a plurality of images, some which are inappropriately exposed. In order to solve these problems, it is possible to provide an imaging device capable of combining a first image of a size smaller than a target image obtained by pixel addition average and pixel addition with a second image having an amplified gain to obtain an appropriate exposure and a plenty of noise, so as to generate the target image and capable of varying the synthesis ratio of the first image and the second image according to the temperature condition and the like so as to obtain an image in which no hand-shake or blur is contained under any illuminance condition and noise is suppressed.

Description

technical field [0001] The present invention relates to an imaging device for capturing a still image, and more specifically relates to a hand shake correction technology. Background technique [0002] Patent Document 1 discloses an invention of an imaging device that uses a small-sized image (hereinafter referred to as "first image"), such as a preview image for preview display, and an image obtained by pressing the shutter of a user, etc. of the imaging device. For the target image (hereinafter referred to as "second image"), hand-shake correction can be performed. [0003] In a general imaging device, exposure control is performed based on the brightness of the surroundings at the time of imaging, and imaging is performed with an appropriate exposure. However, when exposure control causes the exposure time to become longer, the possibility of occurrence of hand shake becomes higher. In contrast, in Patent Document 1, it is assumed that a small first image such as a prev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G03B5/00
CPCH04N5/23267H04N5/23232H04N5/2355H04N5/23277G03B5/00H04N5/23248H04N23/951H04N23/68H04N23/683H04N23/6845H04N23/741H04N5/265H04N23/00
Inventor 竹田光彦
Owner SHARP KK
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