Electronic Image Stabilization With Motion-Based Frame Sizing
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Solution Overview
Problem
Existing image stabilization methods, such as optical and electronic image stabilization, suffer from increased power consumption and loss of field of view due to inefficient handling of camera motion, particularly in electronic devices with camera modules.
Innovation Solution
An electronic device equipped with a motion sensor, image signal processor core, image stabilizer, and image size controller estimates camera motion and adjusts the size of input and output frame images based on motion data to optimize power consumption and field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic image stabilization (EIS) correction is performed to compensate for camera module shaking, then image stabilization is improved, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts the image size based on the estimated motion level. When motion level is high, the input frame image size is reduced to decrease processing power consumption. When motion level is low, the full-resolution image is processed to maintain stabilization quality. This dynamic adaptation resolves the contradiction by making power consumption variable according to actual stabilization needs.
Solution Approach 2:
The patent changes the parameter of image size (resolution) based on motion level conditions. By estimating camera motion and adjusting the input frame image size accordingly, the system optimizes the balance between stabilization performance and power consumption, processing only necessary image data at full resolution while using reduced resolution when motion is minimal.
2Reliability
If electronic image stabilization (EIS) correction is performed to compensate for camera module shaking, then image stabilization is improved, but field of view is lost due to image cropping
Solution Approach 1:
The patent dynamically adjusts the output frame image size based on motion level. When motion level is high, a larger crop margin is applied to maintain stabilization quality. When motion level is low, the crop margin is reduced to preserve more field of view. This dynamic adjustment resolves the contradiction by adapting the field of view loss to actual stabilization requirements.
Solution Approach 2:
The patent changes the parameter of output image size and crop margin based on motion level conditions. By estimating camera motion and adjusting these parameters accordingly, the system optimizes the balance between stabilization performance and field of view preservation, minimizing unnecessary cropping when motion is minimal.
3Measurement precision
If full-resolution frame images are processed to maintain image quality, then image quality is improved, but power consumption increases
Solution Approach 1:
The patent applies partial processing by adjusting the input frame image size based on motion level. When motion level is low, only a portion of the full-resolution image is processed at full quality, while the rest is handled at reduced resolution. This partial action approach maintains adequate image quality for the actual stabilization needs while significantly reducing power consumption from processing unnecessary full-resolution data.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method efficiently stabilizes images by reducing power consumption and minimizing field of view loss through dynamic adjustment of image sizes based on camera motion, enhancing accuracy and clarity while reducing resource usage.
Implementation Method 1
a motion sensor, which generates camera motion data by sensing a motion of a camera module
Data Source
AI summary
An electronic device includes a motion sensor, an image signal processor core, an image stabilizer, and an image size controller. The motion sensor generates camera motion data by sensing motion of a camera module that captures an image to generate an original frame image. The image signal processor core generates processed frame image by processing input frame image corresponding to the original frame image. The image stabilizer generates an output frame image by performing electronic image stabilization of the processed frame image. The image size controller estimates a motion level indicating a degree of camera motion of the camera module based on the camera motion data and control a size of the input frame image or a size of the output frame image based on the motion level. The image stabilization is efficiently performed by estimating camera motion and adjusting the image size according to the camera motion.