# US 2021/0344840 A1 · Method and apparatus for the correction of geometric and depth of field problems during image taking

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- Number: US 2021/0344840 A1
- Document ID: US20210344840A1
- Status: Published application
- Kind: A1
- Application number: 17/374,474
- Filed: 2021-07-13
- Published: 2021-11-04
- Earliest claimed: 2019-01-23
- Inventors: Giovanni SACCO
- Web page: https://patentgrep.com/patent/US20210344840A1

## CPC

- H04N 23/687: {by shifting the lens or sensor position}
- G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing
- G03B 17/02: Bodies
- H04N 23/54: Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
- H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof
- H04N 23/58: Means for changing the camera field of view without moving the camera body, e.g. nutating or panning of optics or image sensors
- H04N 23/6812: {based on additional sensors, e.g. acceleration sensors}
- G03B 2205/0038: by displacing the image plane with respect to the optical axis
- G03B 2217/005: Blur detection
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

An imaging equipment includes an image display; an image sensor; a motor; and an inclinometer, where the image display concurrently displays the image being captured by the image sensor, the motor automatically rotates the image sensor around the center of the motor with respect to at least one of the image sensor's axes, to make the sensor level on the basis of data acquired from a inclinometer, the motor allows the user to control the motor to shift the image sensor along at least one of the image sensor's axes, and the motor allows the user to control the motor to rotate the image sensor with respect to at least one of the image sensor's axes to have the motor tilt and swing the image sensor in such a way as to move two or more points, selected by the user, to lie on a same focus plane.

## Claims

### Claim 1

A method for the perspective control of images from an imaging equipment having an inclinometer, an image sensor that captures an image, an image display that concurrently displays the image captured by the image sensor, and a motor that moves the image sensor, three Cartesian axes being defined by a y axis, an x axis, and a z axis that intersect at a center of the image sensor, the method comprising the steps of:
having the inclinometer measure and report an angle theta[z] of the image sensor's z axis with respect to a level orientation of the image sensor and concurrently having the image display display the image captured by the image sensor;
based on the report of the angle theta[z], having the motor make a correction by rotating the image sensor around the center of the motor with respect to the image sensor's z axis, by the motor rotating the image sensor by an angle of minus theta[z] to thereby reduce the angle theta[z] of the image sensor's z axis to a zero value, said connection by said motor rotation leveling the image thereby avoiding a keystoning effect in the image; and
controlling the motor to move the image sensor linearly along at least one of the image sensor's y axis and x axis, the linear movement along the y axis being up to a first specified threshold along the y axis and the linear movement along the x axis being up to a second specified threshold along the x axis, said linear movement along at least one of the image sensor's y axis and x axis reducing or avoiding a need to tilt the imaging equipment in order to capture a portion of interest in the scene,
wherein said first and second specified thresholds can be set independently to respective first and second default values, thus allowing the perspective control without user intervention, and
wherein said first and second default values can be overridden by a user to thereby override the first and second specified thresholds.

### Claim 2

A method for the automatic leveling of images from an imaging equipment having an image display, an image sensor that captures an image, and a motor that rotates the image sensor, three Cartesian axes being defined by a y axis, an x axis, and a z axis that intersect at a center of the image sensor, and in-body image stabilization that avoids camera shake, said stabilization provided by said motor or by an additional motor, the method comprising the steps of:
having an inclinometer report an angle theta of the image sensor's y axis with respect to a level orientation of the image sensor and concurrently having the image display the image captured by the image sensor; and
based on the report of the angle theta, having the motor rotate the image sensor around the center of the motor with respect to the image sensor's y axis, by the motor rotating the image sensor by an angle of minus theta, and using the in-body image stabilization to provide finer corrections for camera shake.