JP2007235995A5

JP2007235995A5 -

Info

Publication number: JP2007235995A5
Application number: JP2007124081A
Authority: JP
Filing date: 2007-05-09
Publication date: 2007-11-22
Anticipated expiration: 2022-02-27

Claims

An achromatic portion of a subject image is detected based on a color signal generated from an output signal of an image sensor via an optical system, and the gain of the color signal is adjusted according to the amount of white balance deviation detected from the achromatic portion. In an imaging apparatus that includes a white balance control unit that controls, a subject distance detection unit that detects a distance to a subject, and a zoom value detection unit that detects a zoom value of the optical system, and performs a white balance deviation correction operation.
Subject brightness detection means for detecting the brightness of the subject;
Based on the subject brightness information detected by the subject brightness detection means, the subject distance detection information detected by the subject distance detection means, and the zoom value information detected by the zoom value detection means, the white balance control means A white balance control amount adjustment value setting means for generating a white balance control amount adjustment value for adjusting a white balance control amount, and adjusting a control amount of the white balance control means by the white balance control amount adjustment value. An imaging device that is characterized.

The imaging device according to claim 1,
The white balance control adjustment means includes:
Subject distance threshold setting means for generating a subject distance threshold for determining the magnitude of the distance to the subject based on the subject brightness information and the zoom value information;
An image pickup apparatus comprising: white balance control amount adjustment value setting means for comparing the subject distance detection information with the subject distance threshold information and obtaining the white balance control amount adjustment value according to the comparison result.

The imaging apparatus according to claim 1 or 2,
2. The image pickup apparatus according to claim 1, wherein the white balance control amount is a speed or gain change amount when controlling the gain of the color signal.

The imaging apparatus according to claim 2, wherein
The imaging apparatus according to claim 1, wherein the subject distance threshold generated by the subject distance threshold setting means increases as the zoom value increases and increases as the subject brightness decreases.

The imaging apparatus according to claim 1 or 2,
2. The imaging apparatus according to claim 1, wherein the white balance control amount adjustment value changes in a binary or multistage manner.

The imaging apparatus according to claim 1 or 2,
2. The image pickup apparatus according to claim 1, wherein the white balance control amount adjustment value changes in a hysteresis characteristic according to a change in a subject distance.

  Subject distance detection means for detecting the distance to the subject;
  Zoom value detection means for detecting the zoom value of the optical system;
  Subject brightness detection means for detecting the brightness of the subject;
  An achromatic portion of a subject image is detected based on a color signal generated from an output signal of an image sensor via the optical system, and the gain of the color signal is determined according to the amount of white balance deviation detected from the achromatic portion With white balance control means to control
  With
  When zoom value information is fixed,
    When the subject distance detection information is the first value and the subject brightness information changes, the presence / absence of white balance adjustment is switched with the first boundary value as a boundary, and
    When the subject distance detection information is a second value that is different from the first value, if the subject brightness information changes, white balance is set with the second boundary value different from the first boundary value as a boundary. The presence / absence of adjustment is switched
  An imaging apparatus characterized by that.

  Subject distance detection means for detecting the distance to the subject;
  Zoom value detection means for detecting the zoom value of the optical system;
  Subject brightness detection means for detecting the brightness of the subject;
  An achromatic portion of a subject image is detected based on a color signal generated from an output signal of an image sensor via the optical system, and the gain of the color signal is determined according to the amount of white balance deviation detected from the achromatic color portion. With white balance control means to control
  With
  When zoom value information is fixed,
    When the subject brightness information is the first value and the subject distance detection information changes, the presence / absence of white balance adjustment is switched with the first boundary value as a boundary, and
    When the subject brightness information is a second value that is different from the first value, if the subject distance detection information changes, white balance is set at the second boundary value that is different from the first boundary value. The presence / absence of adjustment is switched
  An imaging apparatus characterized by that.

  Subject distance detection means for detecting the distance to the subject;
  Zoom value detection means for detecting the zoom value of the optical system;
  Subject brightness detection means for detecting the brightness of the subject;
  An achromatic portion of a subject image is detected based on a color signal generated from an output signal of an image sensor via the optical system, and the gain of the color signal is determined according to the amount of white balance deviation detected from the achromatic color portion. With white balance control means to control
  With
  When the subject brightness information is fixed,
    When the zoom value information is the first value and the subject lightness information changes, the presence / absence of white balance adjustment is switched from the first boundary value, and
    When the zoom value information is a second value different from the first value and the subject brightness information changes, the white balance value is changed with the second boundary value different from the first boundary value as a boundary. The presence or absence of adjustment switches
  An imaging apparatus characterized by that.

  The imaging apparatus according to claim 9, wherein
  When the zoom value information is the first value, white balance adjustment is performed when the subject distance detection information is greater than the first boundary value, and when the subject distance detection information is less than the first boundary value, white balance adjustment is performed. Control not to make adjustments,
  When the zoom value information is the second value, white balance is adjusted when the subject distance detection information is larger than the second boundary value, and when the subject distance detection information is less than the second boundary value, white balance is adjusted. To prevent adjustment
  An imaging apparatus characterized by that.