Rotatable Camera Subject Tracking and Exposure Adjustment

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Solution Overview

Problem

Current mobile phones with rotatable cameras primarily offer automatic panoramic photo shooting and lack additional functionalities to improve image quality, such as adjusting for subject location, exposure, or composition.

Innovation Solution

An automatic camera adjustment method for electronic devices with rotatable cameras, which obtains parameters like location, exposure, or image composition information from preview images and adjusts the camera's rotation direction and angle to enhance image quality by compensating for device movement, correcting exposure, or aligning composition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the camera is made rotatable to enable automatic panoramic photo shooting, then the camera can automatically rotate and capture photos without user rotation, but the camera lacks additional functions to improve image quality such as subject location adjustment, exposure optimization, or composition enhancement

Engineering Contradiction:

Improveautomatic panoramic photo shootingVSAvoidimage quality improvement functions

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The camera system integrates multiple functions into a single device: it performs both automatic panoramic photo shooting and real-time image quality optimization through subject location tracking, exposure adjustment, and composition enhancement, allowing one camera to serve multiple photographic needs simultaneously

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The camera automatically analyzes preview images to detect subject location, exposure quality, and composition metrics, then autonomously adjusts rotation parameters and shooting angles without requiring manual user intervention or additional external devices

Inventive Principle:

Principle #25Self-service

2Ease of operation

If the camera automatically rotates for panoramic shooting, then the user does not need to rotate the body or hand, but the camera cannot compensate for device movement or optimize subject positioning

Engineering Contradiction:

Improvehands-free panoramic captureVSAvoidsubject location accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The system continuously monitors the location of the subject in the preview image during rotation, compares it against the initial location, and provides feedback to adjust the rotation parameters in real-time to maintain optimal subject positioning and compensate for device movement

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The camera captures the initial location of the subject before rotation begins, establishing a reference point that guides subsequent rotation adjustments to ensure the subject remains properly positioned in the final panoramic image

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If the camera provides only basic panoramic shooting function, then the device complexity remains low, but the image quality and photographic results are limited

Engineering Contradiction:

Improvecamera function simplicityVSAvoidimage quality

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The system replaces complex mechanical adjustment mechanisms with software-based image analysis and computational photography techniques, using algorithms to detect subject location, assess exposure quality, and calculate optimal rotation parameters from preview image data

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10171729B2Directional adjustment for a camera based on exposure quality information

Publication Date: 2019.01.01 HUAWEI TECH CO LTD

AI summary

An automatic camera adjustment method and an electronic device, where the method is applied to an electronic device with a rotatable camera. The electronic device obtains a parameter of a preview image in a shot of the camera, determines a parameter for rotating of the camera according to the parameter of the preview image, and adjusts an azimuth of the camera according to the parameter for rotating of the camera. Quality of a photographed image may be improved by adjusting the camera.