Object-Aware Tilt Correction for Captured Image Resolution
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Solution Overview
Problem
Existing image processing techniques for tilt correction in captured images often result in reduced resolution due to large tilt correction angles, and the necessity of tilt correction varies based on the object being captured.
Innovation Solution
An image processing apparatus and method that dynamically adjust tilt correction based on object information, using a correction amount switcher to set permissible tilt correction amounts based on the object's need for correction, and consider camera shake and image enlargement limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a large tilt correction angle is applied, then the tilt correction effectiveness is improved, but the clipping area becomes small and the enlargement amount increases, resulting in lowered resolution
Solution Approach 1:
The patent applies dynamics by making the tilt correction angle adjustable rather than fixed. The correction angle is dynamically changed based on the type of captured object (e.g., buildings, landscapes, plants, faces), allowing the system to optimize between correction effectiveness and resolution preservation for different scenarios
Solution Approach 2:
The patent changes the parameter of tilt correction angle based on object type. Different correction angles are selected for different objects (larger angles for buildings/landscapes, smaller angles for plants/faces), which resolves the contradiction by adapting the correction strength to the specific needs of each object type
2Stability of the object's composition
If tilt correction is applied to all objects uniformly, then the correction consistency is improved, but the image quality degradation increases for objects where tilt correction is not necessary
Solution Approach 1:
The patent applies local quality by treating different object types differently in terms of correction intensity. Instead of uniform correction, the system applies appropriate correction levels locally for each object type (high correction for buildings/landscapes, low or no correction for plants/faces), thereby maintaining image quality while ensuring necessary corrections are applied
Data Source
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AI summary
The image processing apparatus includes a correction unit (206, 216, 217, 219) configured to perform, using information on a tilt of an image capturing apparatus around an optical axis, tilt correction on image data generated by the image capturing apparatus, and an object information acquiring unit (218) configured to acquire information on an object included in the image data. The object information acquiring unit is configured to set a tilt correction amount in the tilt correction depending on the information on the object.