Directional Sensor Lens Correction for Crosstalk
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Solution Overview
Problem
Existing imaging devices face issues with image quality degradation when using a multiple-property lens, as they either acquire images with fewer pixels than the directional sensor or suffer from sensitivity differences between pixels, leading to mixed luminous fluxes between images from central and annular optical systems.
Innovation Solution
An imaging device with a lens attaching portion for multiple-property and typical lenses, a directional sensor with two-dimensionally arranged photoelectric conversion elements, and units for determining the lens type and performing image correction, allowing for selective reception of luminous flux and correction of image signals based on the attached lens type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multiple-property lens is attached to the imaging device, then multiple images with different focal properties can be acquired simultaneously, but image quality degrades due to sensitivity differences between pixels receiving light from different optical systems
Solution Approach 1:
The patent applies preliminary action by determining the lens type in advance and selecting the appropriate correction algorithm before image processing. The control unit identifies whether a multiple-property lens or typical lens is attached, then pre-selects the corresponding correction method (first algorithm for multiple-property lenses, second algorithm for typical lenses) to eliminate sensitivity differences and prevent image quality degradation before the actual imaging occurs.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the image correction algorithm based on the detected lens type. When a multiple-property lens is detected, the system switches to a correction algorithm specifically designed to handle sensitivity differences between pixels receiving light from different optical systems, thereby maintaining image quality across varying optical configurations.
2Quantity of substance
If all pixels of the directional sensor are used to generate one image, then the full resolution of the sensor is utilized, but sensitivity differences between pixels cause degradation of image quality
Solution Approach 1:
The patent applies local quality by implementing pixel-specific sensitivity correction. The control unit identifies pixels that receive light from different optical systems and applies targeted correction to these specific pixels based on the lens type. This localized approach maintains the use of all pixels for full resolution while correcting sensitivity differences only where needed, preventing image quality degradation.
3Productivity
If a typical lens is attached instead of a multiple-property lens, then a single image can be acquired with all pixels, but the device cannot utilize the multiple optical systems for simultaneous multi-focal imaging
Solution Approach 1:
The patent implements universality by designing an image correction system that can handle both multiple-property lenses and typical lenses through a unified control architecture. The control unit automatically detects the lens type and selects the appropriate correction algorithm, enabling the imaging device to maintain optimal performance whether using a multiple-property lens for simultaneous multi-focal imaging or a typical lens for single-image acquisition.
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 device achieves favorable image quality for both multiple-property and typical lenses by determining the lens type and performing appropriate image correction, reducing crosstalk and sensitivity differences, thereby improving image quality.
Implementation Method 1
selectively receives each luminous flux incident through the plurality of areas at the plurality of types of pixels by pupil division of the luminous flux
Implementation Method 2
directional sensor that has a plurality of types of pixels configured of two-dimensionally arranged photoelectric conversion elements
Data Source
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AI summary
Provided are an imaging device and a control method therefor that acquire an image of favorable image quality with both of a multiple-property lens and a typical lens along with use of a directional sensor. The multiple-property lens that has a plurality of areas with each of the plurality of areas having an independent property and the typical lens that has one property are selectively attached to a lens attaching portion. The type of lens attached to the lens attaching portion is determined. In a case of the multiple-property lens being attached to the lens attaching portion, a plurality of images corresponding to the plurality of areas is generated. In a case of the typical lens being attached thereto, one image is generated from imaging signals of all pixels of the directional sensor. In the case of the multiple-property lens being attached to the lens attaching portion, performed is correction of removing, from an image generated in correspondence with one area of the plurality of areas, influence of a luminous flux passing an area other than the one area. In the case of the typical lens being attached thereto, a difference in sensitivity for each pixel of a plurality of types of pixels is corrected.