Imaging apparatus including automatic brightness adjustment function and imaging method

An imaging device and brightness adjustment technology, applied in image communication, static cameras, color TV components, etc., can solve problems such as lengthening, image brightness is very different, and it is not considered whether bright or dark is unknown, etc.

Inactive Publication Date: 2004-09-29
CASIO COMPUTER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, since the initial exposure time, initial aperture size, and initial gain are set to predetermined fixed values ​​(preset values), whether the environment is bright or dark when the imaging device according to the related art is initially powered on is not considered. is unknown, so in some cases the brightness of an image acquired immediately after turning on the power may differ greatly depending on the ambient brightness, in which case the time it takes for the image signal to reach the appropriate brightness becomes long

Method used

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  • Imaging apparatus including automatic brightness adjustment function and imaging method
  • Imaging apparatus including automatic brightness adjustment function and imaging method
  • Imaging apparatus including automatic brightness adjustment function and imaging method

Examples

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no. 1 example

[0027] FIG. 1 is a block diagram showing a circuit configuration of an embodiment of an imaging device according to the present invention, which depicts a digital camera as an example of the imaging device. However, embodiments of the imaging device are not limited to digital cameras.

[0028] The digital camera 10 includes an imaging device 11, an A / D converter 12, a signal processor 13, a controller 14, a TG (time gate) 15, an LCD unit (display unit) 16, a nonvolatile memory 17, a keyboard input device 18, and flash memory 19.

[0029] The imaging device 11 includes an aperture device 111 , a CCD (imaging element) 112 , and an AGC amplifier 113 .

[0030] The aperture device 111 adjusts the amount of input light incident on the CCD 112 .

[0031] The CCD 112 acquires an optical image of an object entering through the aperture device 111 , converts it into an image signal, and outputs the acquired signal to the AGC amplifier 113 .

[0032] The AGC amplifier 113 amplifies t...

no. 2 example

[0080] Although the initial brightness adjustment amount is set by manual operation (keyboard operation) in the first embodiment, the present invention is not limited thereto, and the present invention can also provide an automatic setting unit to automatically set the initial brightness Adjustment amount. The automatic setting unit for the initial brightness adjustment amount will be described below.

[0081] Figure 5 is a block diagram showing a circuit configuration of an example of an imaging device according to the present invention, and a digital camera is taken as an example of the imaging device in the figure.

[0082] exist Figure 5 Among them, a digital camera 30 includes an imaging device 11, an A / D converter 12, a signal processor 13, a controller 14, a TG 15, an LCD unit (display unit) 16, a nonvolatile memory 17, a keyboard input device 18, and The flash memory 19, the above-mentioned device has the same structure and function as the device in the digital ca...

no. 3 example

[0105] Although in the second embodiment, the initial brightness adjustment amount is set based on the optical sensor output immediately before the power is turned on, or the brightness adjustment amount immediately before the power is turned off, the initial brightness adjustment amount may also be set based on the image pickup environment information is automatically set. An automatic setting unit for an initial brightness adjustment amount based on image pickup environment information will now be described.

[0106] Figures 7A to 7D It is a flowchart showing an example of an operation of setting an initial brightness adjustment amount by an automatic brightness setting unit. Figure 7A Indicates an example where the initial brightness adjustment amount is automatically set according to time, Figure 7B Indicates an example where the initial brightness adjustment amount is automatically set according to the date, Figure 7C An example showing that the initial brightness ...

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Abstract

When a user selects an initial brightness adjustment quantity setting mode by a mode key operation of a digital camera, an initial brightness adjustment quantity setting screen is displayed on a liquid crystal display in place of an initial screen. When the user inputs and sets an arbitrary initial brightness adjustment quantity by a cursor key operation, the input and set initial brightness adjustment quantity is stored in a non-volatile memory. Thereafter, when a power supply is turned off and then the power supply is again turned on, the brightness adjustment operation relative to an imaging device is executed by using the initial brightness adjustment quantity stored in the non-volatile memory.

Description

technical field [0001] The present invention relates to an imaging device and an imaging method including an automatic brightness adjustment function used in a photographic device such as a digital camera. Background technique [0002] Generally, in imaging devices such as digital cameras, the function of automatic brightness adjustment is widely used, that is, according to each CCD exposure time, "calculate the average brightness of the image signal output from the imaging unit, such as CCD, And according to this brightness average value, in the next CCD exposure, increase / reduce aperture, brightness adjustment amount, gain, etc. at a fixed rate" processing function, so that the viewfinder can be continuously displayed on the monitor with appropriate brightness image (through image: through image). [0003] Figure 8A is a view representing the temporal transient of the average value of luminance calculated from the image signal output from the CCD after the power is turne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N101/00
CPCH04N5/2351H04N5/2352H04N5/235H04N23/72H04N23/70H04N23/71H04N23/75
Inventor 篠崎芳彦
Owner CASIO COMPUTER CO LTD
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