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Storage medium, lens device, image pickup device and processing device

A storage medium and processing device technology, which is applied in image data processing, image enhancement, image communication, etc., and can solve problems such as uneven ring shape of image data

Inactive Publication Date: 2020-06-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the correction amount at each image height is expressed by an nth-order polynomial as a relatively low-order expression, there is an advantage that the amount of data can be reduced, but when approximated in the case of a sharp change in the amount of light depending on the image height It may be disadvantageous in terms of the error exhibited when the correction amount
For example, in the case where the correction amount is approximated by a fourth-order polynomial, when the correction amount fluctuates with the image height, it may be strange that the corrected image data exhibits ring-shaped unevenness

Method used

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  • Storage medium, lens device, image pickup device and processing device
  • Storage medium, lens device, image pickup device and processing device
  • Storage medium, lens device, image pickup device and processing device

Examples

Experimental program
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Effect test

no. 1 example

[0031] figure 1 is a diagram showing a configuration example of the image pickup device according to the first embodiment of the present invention. The image pickup device is configured such that the lens device 100 is detachably mounted to the camera device 200 . The focus lens unit 101 is configured to move for focusing. The focus lens unit may have a function of so-called inner focus or floating focus in which subunits of the focus lens unit are moved for focusing. The zoom lens unit 102 is configured to move for zooming. The zoom lens unit may include three or more lens subunits configured to move for zooming. The aperture stop 103 has an aperture that can be changed according to zooming or an operation performed by a user. The aperture stop can be operated continuously.

[0032] The detector 110 (hereinafter also referred to as “focus state detector”) is configured to detect the state (eg, position) of the focus lens unit 101 . When the focusing lens unit 101 includ...

no. 2 example

[0154] Figure 6 is a diagram showing a configuration example of an image pickup device according to a second embodiment of the present invention. The difference from the exemplary configuration of the image pickup device according to the first embodiment is that the image pickup device includes a beam expander lens unit 104, and the beam expander lens unit 104 can be selectively inserted into or removed from the optical path remove. Furthermore, another difference is that the image pickup device includes an insertion / removal state detector 113 configured to detect an insertion or removal state of the beam expander lens unit 104 . Furthermore, there is still another difference in that the image pickup apparatus includes an adjustment device 150 configured to adjust a correction amount and a switching device 160 for switching ON / OFF of transmission of correction data. The adjusting device 150 and the switching device 160 each function as a user interface device. Similar to t...

no. 3 example

[0162] Figure 8is a diagram showing a configuration example of an image pickup device according to a third embodiment of the present invention. The difference from the exemplary configuration of the first embodiment is that the image pickup device includes one or more beam expander lens units 104 that are selectively inserted into or removed from the optical path , and is configured to change the focal length range of the lens device realized by the zoom lens unit in a stepwise manner. Furthermore, another difference is that the image pickup device includes an insertion / removal state detector 113 configured to detect an insertion or removal state of the beam expander lens unit 104 . Furthermore, there is still another difference in that the lens apparatus 100 does not include the memory 140 , and the camera apparatus 200 includes the memory 235 and the switching device 250 configured to switch ON / OFF of the correction process. The switching device 250 may not switch between...

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Abstract

A storage medium, a lens device, an image pickup device, and a processing device are disclosed. A storage medium is provided that stores correction data for obtaining a correction amount for correcting image data obtained from an image formed by a lens device with respect to a light amount distribution in the image, wherein the correction The data includes coefficients of an n-th order polynomialwith respect to the image height h (where n is a non-negative integer), the coefficients corresponding to the state of the lens device. The coefficient satisfies the first conditional expression:-0.15<=dD'(h)-dDlens(h)<=1.98, wherein dDlens(h) represents the change amount of light of increase amount dh of each image height at the image height h, and dD'(h) represents the change amount of each increase dh of the value of the n-th order polynomial at the image height h.

Description

technical field [0001] The present invention relates to a storage medium, a lens device, an image pickup device, a processing device, a camera device, a method of manufacturing a lens device, and a method of manufacturing a processing device. Background technique [0002] In most broadcast cameras (television cameras), movie cameras, photo cameras, video cameras, and the like, the amount of light in the peripheral portion of the image plane is smaller than that in the central portion of the image plane. The ratio (relative illuminance) of the light amount of the peripheral portion to the light amount of the central portion varies as the optical system is operated by operations such as zooming, focusing, or an aperture stop. [0003] The change in the ratio is caused by one or both of the change in the light amount of the central portion and the change in the light amount of the peripheral portion. The main reason is that when the optical system is operated in the above-desc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/225H04N5/232H04N5/217H04N23/76
CPCH04N23/81H04N23/55H04N23/54H04N23/67G02B13/16G03D3/00G02B7/102H04N25/61G02B15/1421G02B15/15H04N23/80G06T5/92
Inventor 山田智也后藤和史
Owner CANON KK