Camera Viewfinder Guidance for Long-Focus Target Locking

Solution Overview

Problem

When switching from a wide-angle or middle-focus camera lens to a long-focus camera lens, electronic devices often lose the target object, making it difficult for users to lock and capture the object, leading to a frustrating and time-consuming search process.

Innovation Solution

The electronic device provides a method to guide the user in moving the device based on prompt information, such as arrows or size adjustments of viewfinder frames, to quickly lock the target object using the long-focus camera lens, allowing for intuitive movement and automatic picture taking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the electronic device switches from a wide-angle or middle-focus camera lens to a long-focus camera lens, then the zoom ratio is improved, but the target object is lost and the framing range becomes smaller

Engineering Contradiction:

Improvezoom ratioVSAvoidtarget object location information

Core Design Contradiction:

SpeedVSLoss of information

Solution Approach 1:

The patent applies preliminary action by displaying the preview picture from the wide-angle or middle-focus camera lens before switching to the long-focus camera lens. This allows the user to identify and locate the target object in advance, and the system can then use this location information to guide the user in重新 finding the target object after switching to the long-focus lens, thereby preventing loss of the target object.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses an intermediary approach by introducing a guide mechanism that provides guidance information to the user during the transition between camera lenses. The guide helps the user reconnect with the target object by providing directional or positional cues, acting as a mediator between the wide-angle view and the long-focus view to prevent loss of the target object.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If the long-focus camera lens is used for preview, then the zoom ratio is improved, but the user takes a long time to find the target object

Engineering Contradiction:

Improvezoom ratioVSAvoidtime to find target object

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The patent applies preliminary action by displaying the preview picture from the wide-angle or middle-focus camera lens before switching to the long-focus camera lens. This allows the user to identify and locate the target object in advance, and the system can then use this location information to guide the user in重新 finding the target object after switching to the long-focus lens, thereby preventing loss of the target object.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses feedback by providing real-time guidance information to the user during the search process. The guide displays information about the target object's location and provides feedback on the user's progress, helping the user quickly find the target object without having to search blindly through the long-focus lens view.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If the framing range is reduced when switching to long-focus lens, then the detail view is improved, but the target object easily goes out of the preview picture

Engineering Contradiction:

Improvedetail viewVSAvoidtarget object retention in frame

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent applies preliminary action by displaying the preview picture from the wide-angle or middle-focus camera lens before switching to the long-focus camera lens. This allows the user to identify and locate the target object in advance, and the system can then use this location information to guide the user in重新 finding the target object after switching to the long-focus lens, thereby preventing loss of the target object.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3866458B1Method and device for capturing images

Publication Date: 2023.09.20 HUAWEI TECH CO LTD

Figure 1A
Figure 1B~1C
Figure 1D

AI summary

Embodiments of this application relate to the electronic technology field, and provide a shooting method and a device, to guide a user to move an electronic device based on a target object. In this way, the electronic device can quickly lock the target object by using a long-focus camera lens, thereby reducing a time for searching for the target object and improving user experience. The detailed solution is as follows: starting, by an electronic device, a camera; respectively collecting a first preview picture and a second preview picture by using a first camera lens and a second camera lens, where the second camera lens is a long-focus camera lens; displaying a first preview screen, where the first preview screen includes a first viewfinder frame, a second viewfinder frame, and a third viewfinder frame, the first viewfinder frame is used to display the first preview picture, a picture in the second viewfinder frame is a part of the first preview picture, content in the second viewfinder frame is a target object to be shot by the second camera lens, and the third viewfinder frame is used to display the second preview picture; and displaying, by the electronic device, first prompt information, where the first prompt information is used to guide a user to move the electronic device, so that the second camera lens can lock the target object after the electronic device is moved. The embodiments of this application are applied to picture taking.