CROSS REFERENCE TO RELATED APPLICATIONS

This application is a U.S. National Phase of International Patent Application No. PCT/JP2019/017568 filed on Apr. 25, 2019, which claims priority benefit of Japanese Patent Application No. JP 2018-090355 filed in the Japan Patent Office on May 9, 2018. Each of the above-referenced applications is hereby incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present technology relates to a data processing apparatus, a data processing method, and a program, and more particularly, to a data processing apparatus, a data processing method, and a program that are capable of generating calibration data for performing appropriate image processing.

BACKGROUND ART

In a case where, for example, feature point matching or block matching is to be performed to generate parallax information regarding parallax from a plurality of images that are captured from different viewpoints by using a stereo camera or other multi-lens camera having a plurality of lenses, calibration is performed initially to generate calibration data in the form of parameters representing, for example, the lens position and lens distortion of each of the plurality of lenses and the difference in the posture of the lenses of the multi-lens camera in order to eliminate the influence exerted by the lens position and lens distortion of each of the plurality of lenses and the difference in the posture of the lenses. In this instance, the parallax information is, for example, a disparity indicating the parallax by the number of pixels or a depth distance corresponding to the parallax.

A calibration technique described, for example, in NPL 1 generates calibration data from a calibration image. The calibration image is a captured image obtained by capturing an image of a two-dimensional chart for calibration that is a known object (hereinafter referred to also as a calibration chart).

CITATION LIST

Non Patent Literature

[NPL 1]

Zhengyou Zhang, “A Flexible New Technique for Camera Calibration,” IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, VOL. 22, NO. 11

SUMMARY

Technical Problems

Incidentally, in general calibration, control is exercised so as to set a focus position of a multi-lens camera at a predetermined distance, and then an image of a calibration chart disposed in the focus position or in a position at a predetermined distance within a depth of field is captured. Subsequently, a calibration image obtained by capturing the image of the calibration chart is used to generate calibration data for the focus position of the multi-lens camera that is controlled at a predetermined distance.

The calibration data generated in the above-described manner relates to the focus position of the multi-lens camera that is employed to capture the image of the calibration chart. Therefore, if the calibration data is used to perform image processing on a captured image of a general object in a case where, for example, the focus position in which the image of the general object is captured differs from the focus position in which the image of the calibration chart is captured, it is possible that an inappropriate image processing may be performed.

The present technology has been made in view of the above circumstances, and makes it possible to generate calibration data for performing appropriate image processing.

Solution to Problems

A data processing apparatus according to the present technology includes an interpolation section that performs interpolation to generate calibration data for a predetermined focus position by using calibration data for a plurality of focus positions, the calibration data for the plurality of focus positions being generated from a calibration image captured at the plurality of focus positions, the calibration image being obtained by capturing an image of a known object in the plurality of focus positions with a multi-lens camera that captures an image from two or more viewpoints.

A data processing method according to the present technology includes performing interpolation to generate calibration data for a predetermined focus position by using calibration data for a plurality of focus positions, the calibration data for the plurality of focus positions being generated from a calibration image captured at the plurality of focus positions, the calibration image being obtained by capturing an image of a known object in the plurality of focus positions with a multi-lens camera that captures an image from two or more viewpoints.

The data processing apparatus, the data processing method, and the program according to the present technology perform interpolation to generate calibration data for a predetermined focus position by using calibration data for a plurality of focus positions. The calibration data for the plurality of focus positions is generated from a calibration image captured at the plurality of focus positions. The calibration image is obtained by capturing an image of a known object in the plurality of focus positions with a multi-lens camera that captures an image from two or more viewpoints.

The data processing method according to the present technology includes generating calibration data for a plurality of focus positions from a calibration image captured at a plurality of focus positions, the calibration image being obtained by capturing an image of a known object in the plurality of focus positions with a multi-lens camera that captures an image from two or more viewpoints.

The data processing method according to the present technology generates calibration data for a plurality of focus positions from a calibration image captured at the plurality of focus positions, the calibration image being obtained by capturing an image of a known object in the plurality of focus positions with a multi-lens camera that captures an image from two or more viewpoints.

Advantageous Effect of Invention

The present technology is capable of generating calibration data for performing appropriate image processing.

It should be noted that the present technology is not necessarily limited to the above effect. The present technology may provide any other advantages described in the present disclosure.

