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Imaging apparatus and exposal control method for the same

A camera device and exposure control technology, which is applied in image communication, color TV parts, TV system parts, etc., can solve the problem that the face cannot be exposed, achieve the suppression of the influence of brightness, and high-precision exposure control Effect

Active Publication Date: 2010-07-21
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the past, in the rectangular photometry area set on the face, since the part near the right angle of the rectangle is located outside the face, when the outside of the face, that is, the peripheral background part of the face has a large difference in brightness compared with the face, When the difference is different, due to the influence of the background brightness around the face, the face may not be properly exposed

Method used

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  • Imaging apparatus and exposal control method for the same
  • Imaging apparatus and exposal control method for the same
  • Imaging apparatus and exposal control method for the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Fig. 1 (a) is a front view of an imaging device related to Embodiment 1 of the present invention, i.e. a digital still camera (hereinafter referred to as a digital camera), Fig. 1 (b) is a top view thereof, and Fig. 1 (c) is a front view thereof Rear view, figure 2 It is a schematic block diagram showing the internal system structure of the digital camera shown in Fig. 1 (a), (b) and (c).

[0079] (Appearance structure of a digital camera)

[0080] 1(a), (b), and (c), the upper part of the digital camera according to Embodiment 1 of the present invention is equipped with a shutter release button SW1, a mode dial SW2, and a secondary LCD display, that is, a secondary liquid crystal display 1. On the front of the digital camera, that is, on the side of the subject, there are a flash light emitting unit 3, an optical viewfinder 4, a distance measuring unit 5, a remote control light receiving unit 6, and a lens barrel unit 7 including a plurality of optical systems.

[00...

Embodiment 2

[0136] The above-mentioned embodiment 1 is concerned with the appropriate exposure for the face and body parts of the subject person in the picture, but in this embodiment, in addition to the face and body part of the subject person, other areas in the picture are also taken into consideration , that takes into account the entire frame.

[0137] The digital camera in this embodiment has the same figure 2 The digital camera shown is the same structure.

[0138] Below, refer to Figure 9 The flow chart shown in this embodiment describes how to control the exposure so that the face and body parts of the subject person and other parts of the area, that is, the entire picture, obtain proper exposure.

[0139] The processing of S1 to S7 in the present embodiment is the same as Figure 5 The illustrated embodiment 1 is the same, and thus the explanation about the processing of S1 to S7 is omitted.

[0140] In S7, after the photometry processing is performed on the person's body p...

Embodiment 3

[0146] In the face detection operation mode of this embodiment, when a person's face is detected in the subject image, and the photometry area is set for the detected person's face, the area range is reduced so that the photometry area is located at the person's face. within the face. The structure of the digital camera in the present embodiment is the same as that of Fig. 1, figure 2 The digital still cameras shown have the same structure. In addition, in this embodiment, the CPU module 104c has the functions of the face detection unit, the exposure control unit, the photometry area setting unit, and the photometry unit described in the above-mentioned summary of the present invention.

[0147] Below, refer to Figure 10 The flow chart shown illustrates how exposure control is performed in this embodiment.

[0148] After the photographer half-presses the release shutter SW1 to turn on the AE operation (S21), the CPU module 104c of the microprocessor 104 judges whether the ...

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Abstract

The invention provides a camera device which can expose the face and body of the imaged person at the same time. The camera device comprises a CCD101 for inputting the image data corresponding to the image person; a face detection unit which is executed by a CPU module 104c in a digital camera microprocessor 104 and used for detecting the face from the picture obtained from the image data outputted by the CCD10; a first photometric unit which is executed by the CPU module 104c and used for using the face detected by the CPU module 104c as the photometric area for photometering; a second photometric unit which is executed by the CPU module 104c and used for judging the upward and downward direction of the face and using the lower part of the face as the photometric area for photometering; an exposure control unit which is executed by the CPU module 104c and used for calculating the exposure amount according the photometering results of the first photometric unit and the photometric unit and then for controlling the exposure according to the calculated exposure amount.

Description

technical field [0001] The present invention relates to an imaging device such as a digital camera having an automatic exposure function and an exposure control method for the imaging device. Background technique [0002] In the previous exposure decision-making methods of digital still cameras, the following methods are well known: multi-zone weighted metering method, which divides the metering range in the screen into multiple metering areas, and the results obtained from each metering area The metering result determines the exposure method; the center-weighted metering method, which places the metering focus on the center of the screen for metering; the central part metering method, which only measures the center of the screen, which accounts for more than ten percent of the screen. Spot metering, this method measures the light at the center of the screen about a few percent of the range, and so on. [0003] However, in the above-mentioned...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235G06K9/00
Inventor 杉浦康一山田学
Owner RICOH KK
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