Panning Assistance via Object Velocity Computation
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Solution Overview
Problem
Conventional panning assistance techniques in photography fail to accurately handle various panning operations due to limitations in detecting translational movements and varying acceleration rates, leading to insufficient background blurring and reduced image quality.
Innovation Solution
An image capture apparatus and method that computes object velocity by comparing angular velocity changes with motion vector changes across image regions, adjusting the optical axis during exposure to maintain the object stationary on the imaging plane, thereby enhancing panning assistance and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gyro sensor is used to detect camera movement for panning assistance, then rotational movement can be detected, but translational movement cannot be detected sufficiently
Solution Approach 1:
The patent combines gyro sensor data (detecting rotational movement) with motion vector information from image processing (detecting translational movement) to create a comprehensive detection system that handles both rotational and translational panning operations accurately
Solution Approach 2:
The patent makes the detection system universal by using multiple detection methods (gyro sensor for rotation, motion vectors for translation) that can handle various types of panning operations regardless of whether they are rotational, translational, or combined
2Productivity
If acceleration rate is used to predict object motion for panning assistance, then motion prediction can be made, but accuracy decreases when panning operation is not constant
Solution Approach 1:
The patent dynamically adjusts the panning assistance by continuously computing object velocity from current motion vectors and angular velocities, allowing the system to adapt to varying panning operations rather than relying on fixed acceleration rate assumptions
Solution Approach 2:
The patent uses real-time feedback from motion vectors and angular velocity measurements to continuously update object velocity calculations, enabling accurate correction even when panning operations change during exposure
3Illumination intensity
If longer exposure time is set to significantly blur the background for panning, then sense of speed is enhanced, but object stability on imaging plane becomes more difficult to maintain
Solution Approach 1:
The patent performs preliminary computation of object velocity using motion vectors and angular velocities before and during exposure, enabling the system to predict and compensate for object position changes throughout the exposure period
Solution Approach 2:
The patent continuously adjusts the optical axis during the entire exposure period based on real-time velocity computations, maintaining continuous correction rather than single-point adjustment to keep the object stable on the imaging plane throughout the long exposure
Data Source
AI summary
An angular velocity of an image capture apparatus and a motion vector between images are detected. An object velocity is computed based on a comparison between a change amount of the angular velocities and a change amount of the motion vectors. Then, by changing an optical axis based on the object velocity during exposure, a panning assistance function capable of dealing with various panning operations can be provided.