Image Capturing Apparatus Angle of View Adjustment for HDR Moving Images
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Solution Overview
Problem
Image capturing apparatuses with CMOS or CCD sensors face challenges in generating moving images with consistent quality due to differences in angle of view caused by zooming operations, leading to varying image qualities within frames.
Innovation Solution
An image capturing apparatus that adjusts the angle of view and pixel count of images differing from a reference image to ensure uniformity, allowing for the combination of images with the same angle of view and pixel count for generating a composite frame, thereby maintaining consistent image quality across frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple frames are combined to generate HDR moving images, then the tonal range is enhanced, but image quality consistency deteriorates due to angle of view differences from zooming operations
Solution Approach 1:
The patent applies parameter changes by adjusting the angle of view and pixel count of captured frames to match a reference frame before combining them. This normalization process ensures that frames captured at different zoom levels are resampled and aligned to consistent parameters, resolving the image quality consistency issue while preserving the HDR tonal range enhancement benefit
Solution Approach 2:
The patent implements preliminary action by performing angle of view adjustment and pixel count normalization on individual frames before the combining operation. By pre-processing the frames to ensure uniform parameters, the system eliminates the quality inconsistency problem that would otherwise occur during the HDR combination process
2Illumination intensity
If frames are selected based on exposure requirements for HDR, then tonal range is enhanced, but angle of view uniformity deteriorates due to zooming operations between captures
Solution Approach 1:
The system changes the angle of view parameter of selected frames by resampling and adjusting them to match the reference frame's angle of view. This allows frames captured at different zoom levels to be normalized to a consistent angle of view, maintaining compositional stability while preserving the exposure diversity needed for HDR
Solution Approach 2:
The patent creates a reference frame that serves as a template for angle of view and pixel count. Other frames are copied and adjusted to match this reference, ensuring that all frames in the HDR sequence have uniform angular and spatial parameters even though they were captured at different zoom levels
Data Source
AI summary
An image capturing apparatus sequentially obtains images obtained by image capturing of a subject and detects the angle of view of each obtained image at the time of image capturing. The apparatus sequentially selects a plurality of images, of the obtained images, which are used to generate one frame. The apparatus combines the selected images to generate a moving image including an obtained composite image as a frame. If the selected images differ in angle of view at the time of image capturing, the apparatus changes all the selected images into images having the same angle of view and the same number of pixels by adjusting angles of view of selected images which differ in angle of view from one reference image of the selected images, and combines the images.