Dynamic Vision Sensor Frame Rate Control for Hyperlapse Capture

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Solution Overview

Problem

Existing image sensors output frames at a fixed rate, leading to unnecessary current consumption and increased battery drain when capturing hyperlapse videos due to dropped frames.

Innovation Solution

An electronic device incorporates an image sensor and a dynamic vision sensor (DVS) to dynamically adjust the frame rate based on the moving speed of the subject, optimizing frame capture and reducing unnecessary frame output.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the image sensor outputs image frames at a fixed frame rate, then the video shooting function is simple to implement, but current consumption increases unnecessarily and battery drain increases

Engineering Contradiction:

Improvevideo shooting functionVSAvoidcurrent consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by making the frame rate adjustable rather than fixed. The processor dynamically changes the frame rate of the image sensor based on the moving speed information from the DVS, allowing the system to adapt to different shooting scenarios and reduce energy consumption when high frame rates are not needed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the frame rate parameter of the image sensor based on moving speed conditions. When the subject moves faster, the frame rate increases to capture more frames; when the subject moves slower, the frame rate decreases to save energy, directly addressing the current consumption issue.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the image sensor outputs image frames at a fixed frame rate, then the frame capture process is simple, but data capacity increases due to unnecessary frame acquisition

Engineering Contradiction:

Improveframe capture processVSAvoiddata capacity

Core Design Contradiction:

Device complexityVSQuantity of substance

Solution Approach 1:

The system dynamically adjusts the frame rate to match the actual shooting needs based on subject movement speed, capturing only the necessary number of frames. This reduces the total data capacity while maintaining video quality, as fewer unnecessary frames are acquired when the subject is moving slowly.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Instead of continuously capturing frames at a high fixed rate, the system captures frames partially based on actual need - increasing frame rate only when the subject moves fast and decreasing it when movement is slow, thereby reducing overall data capacity without sacrificing important motion details.

Inventive Principle:

Principle #16Partial or excessive action

3Ease of operation

If the image sensor outputs image frames at a fixed frame rate, then the sampling process is simple to implement, but frame sampling is required leading to wasted frames

Engineering Contradiction:

Improvesampling processVSAvoidwasted frames

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The system performs preliminary action by determining the appropriate frame rate before capturing frames, based on the subject's moving speed detected by the DVS. This pre-determination eliminates the need for post-capture sampling and frame selection, as the correct frames are captured from the start.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback from the DVS about subject moving speed to continuously adjust the image sensor's frame rate. This closed-loop control ensures that the frame rate matches the actual shooting requirements, eliminating wasted frames that would otherwise require sampling to filter out.

Inventive Principle:

Principle #23Feedback

4Device complexity

If the image sensor outputs image frames at a fixed frame rate, then the system structure is simple, but battery consumption increases

Engineering Contradiction:

Improvesystem structureVSAvoidbattery consumption

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The patent introduces dynamic frame rate adjustment that adapts to shooting conditions, reducing battery consumption by lowering the frame rate when high-speed capture is not needed. The dual-sensor structure (image sensor + DVS) enables this dynamic optimization without significantly increasing overall system complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameters of the image sensor based on real-time conditions detected by the DVS, optimizing power consumption by matching frame rate to actual subject movement speed, thereby reducing unnecessary energy expenditure.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12581182B2Electronic device comprising image sensor and dynamic vision sensor, and operating method therefor

Publication Date: 2026.03.17 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device includes an image sensor; a dynamic vision sensor (DVS); and at least one processor electrically connected to the image sensor and the DVS. The at least one processor shoots video by using the image sensor, determines the moving speed of a subject by using the DVS during the video shooting, determines the frame rate of the image sensor on the basis of the moving speed, controls that the image sensor outputs, on the basis of the frame rate, a plurality of image frames including the subject, and acquires a hyperlapse video on the basis of the plurality of image frames.