JP2014153494A5 - - Google Patents

Claims (12)

An imaging optical system for imaging a subject;
Imaging that generates a first subject image signal formed by a light beam that has passed through a first pupil region of the imaging optical system and a second subject image signal formed by a light beam that has passed through a second pupil region Elements,
Distance detecting means for detecting a distance to a subject based on the first subject image signal and the second subject image signal;
Have
In the image sensor, a plurality of imaging pixels each composed of a plurality of types of pixels having different spectral sensitivity characteristics, and a ranging pixel composed of pixels having spectral sensitivity including the spectral sensitivity of the imaging pixels Are arranged in a two-dimensional matrix,
The distance detecting means calculates a correction coefficient for correcting a distance measurement error caused by subject color information, and a distance calculation step for calculating a distance to the subject using the correction coefficient Ranging device that performs
The correction coefficient calculation step includes
Including a step of calculating an evaluation value calculated based on the subject color information,
A distance measuring apparatus that switches and executes a first correction coefficient calculation step and a second correction coefficient calculation step different from the first correction coefficient calculation step based on the evaluation value. The distance measuring apparatus according to claim 1, wherein the evaluation value is calculated based on a signal value output from the ranging pixel and a signal value output from the imaging pixel. The evaluation value is calculated based on a signal value output from the ranging pixel and a signal value obtained by standardizing a sum of signal values output from the plurality of imaging pixels arranged in the vicinity of the ranging pixel. The distance measuring device according to claim 2, wherein The first correction coefficient calculation step calculates a correction coefficient based on signal values of the plurality of imaging pixels arranged in the vicinity of the distance measurement pixel. The distance measuring device according to item. 5. The distance measuring apparatus according to claim 4, wherein the second correction coefficient calculation step performs calculation processing based on a conversion coefficient calculated at a reference wavelength. The ranging device according to claim 4, wherein the ranging pixel includes a ranging pixel in which a saturated signal value in the ranging pixel is smaller than a saturated signal value in the imaging pixel. The distance measuring device according to claim 6, wherein the distance measuring pixel includes a light reducing member having spectral sensitivity including spectral sensitivity of the imaging pixel. In the second correction coefficient calculation step, for one saturated imaging pixel signal value, the saturated imaging pixel signal value is obtained from the non-saturated ranging pixel signal value and the plurality of non-saturated imaging pixel signal values. The distance measuring device according to claim 7, further comprising a step of calculating The second correction coefficient calculating step calculates a sum of a plurality of imaging pixel signal values that are not saturated from a normalized pixel signal value in a distance measurement pixel that is not saturated for one saturated imaging pixel signal value. 9. The distance measuring device according to claim 8, further comprising a step of calculating the saturated imaging pixel signal value based on the subtracted value. An imaging apparatus comprising the distance measuring device according to claim 1, wherein the imaging optical system is driven and controlled based on a distance to a subject calculated by the distance measuring device. . On the computer,
A two-dimensional matrix is composed of a plurality of imaging pixels composed of a plurality of types of pixels each having different spectral sensitivity characteristics, and a ranging pixel composed of pixels having spectral sensitivity including the spectral sensitivity of the imaging pixels. The first subject image signal generated by the light beam that has passed through the first pupil region of the imaging optical system and the second subject image signal generated by the light beam that has passed through the second pupil region, which are generated by the imaging elements arranged in a shape. And detect the distance to the subject based on
A correction coefficient calculation step for calculating a correction coefficient for correcting a ranging error caused by the subject color information;
A distance calculating step for calculating a distance to the subject using the correction coefficient;
A program for executing
A step of calculating an evaluation value calculated based on the subject color information,
On the basis of the evaluation value, the first correction coefficient calculation step, program characterized by the said first correction coefficient calculating step is performed by switching between different second correction coefficient calculating step. A two-dimensional matrix is composed of a plurality of imaging pixels composed of a plurality of types of pixels each having different spectral sensitivity characteristics, and a ranging pixel composed of pixels having spectral sensitivity including the spectral sensitivity of the imaging pixels. The first subject image signal generated by the light beam that has passed through the first pupil region of the imaging optical system and the second subject image signal generated by the light beam that has passed through the second pupil region, which are generated by the imaging elements arranged in a shape. And detect the distance to the subject based on
A correction coefficient calculation step for calculating a correction coefficient for correcting a ranging error caused by the subject color information;
A distance calculating step for calculating a distance to the subject using the correction coefficient;
Ranging method including
Including a step of calculating an evaluation value calculated based on the subject color information,
Based on the evaluation value, the first correction coefficient calculating step, the distance measuring method and executes switching between different second correction coefficient calculation step and said first correction coefficient calculating step.