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Image-capturing apparatus and method for correcting nonlinear images

An image capture, nonlinear feature technology, applied in the field of image sensors, can solve problems such as reducing resolution

Inactive Publication Date: 2006-06-28
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, since the same output relatively occurs with respect to the light intensity with the rate of change of the input light intensity, there is a problem of lowering the resolution

Method used

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  • Image-capturing apparatus and method for correcting nonlinear images
  • Image-capturing apparatus and method for correcting nonlinear images
  • Image-capturing apparatus and method for correcting nonlinear images

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Embodiment Construction

[0036] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0037] Figure 1A with Figure 1B is a block diagram schematically showing an image capturing device for correcting a non-linear image according to an exemplary embodiment of the present invention; Figure 1A is a block diagram for correcting a non-linear image before converting the electrical signal converted in the image sensor 30 into a digital signal, Figure 1B is a block diagram for correcting a non-linear image after converting an electrical signal converted in the image sensor 30 into a digital signal.

[0038] exist Figure 1A with Figure 1B Among them, the image capture device for correcting nonlinear images includes a lens 10 , an optical device 20 , an image sensor 30 , a correction unit 40 , a converter 50 and a signal processing unit 60 .

[0039] First, the lens 10 collects input light and sends it to the optical device 20 .

[0040] The optic...

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Abstract

An image capturing device for correcting a nonlinear image, comprising: an optical device converting an input image to have a nonlinear characteristic with respect to light intensity; an image sensor converting the input image having a nonlinear characteristic into an electrical signal; a correction unit correcting the electrical signal Obtaining a signal having a linear characteristic with respect to light intensity; a converter converting the corrected signal into a digital signal; and a signal processing unit processing the converted digital signal for display as an output image, therefore, if the optical device having a nonlinear characteristic extends The dynamic range of the image sensor, the output having a nonlinear characteristic with respect to the light intensity is corrected to have a linear characteristic, so the resolution of the image can be improved.

Description

technical field [0001] The present invention relates to an image capture device and method for correcting a non-linear image, and more particularly, to an image capture device and method for correcting a non-linear image so that the image has a linear characteristic with respect to light intensity, wherein the image capture device uses a Image sensors with extended dynamic range by optics with nonlinear characteristics. Background technique [0002] The dynamic range of an image sensor refers to an index in the ability to process a light signal into an image with light intensity levels. That is, the dynamic range refers to a ratio of a saturation level of a pixel to a signal-to-noise level of a pixel, and can be described in Equation 1 below. [0003] [equation 1] [0004] D = 20 log 10 ( Saturation - ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00H04N1/407H04N23/76
CPCH04N23/741H04N23/75H04N23/82H04N5/202
Inventor 崔东范金文喆金秀英
Owner SAMSUNG ELECTRONICS CO LTD