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Image pickup system

A technology of a camera system and a camera element, which is applied in the field of camera systems and can solve problems such as being unsuitable for acquiring dynamic images.

Active Publication Date: 2014-05-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] When the inventors of the present application studied the existing camera system for observing skin in detail, they found that it was not suitable for acquiring dynamic images.

Method used

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Experimental program
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Embodiment approach 1

[0056] figure 1 It is a schematic diagram which shows the structure of the imaging system AP of Embodiment 1. figure 1 The shown imaging system AP has: an imaging device A; a polarized illumination Qa; and a control unit CS. In the present embodiment, the polarized illumination Qa includes a light source LS1 that emits light of visible light, and a polarization filter PL1 arranged to transmit the light irradiated from the light source LS1. Polarization filter PL1 has a first polarization axis parallel to the first direction, and the light emitted from polarized illumination Qa is, in this embodiment, polarized light in the visible light band vibrating in the first direction. The polarized illumination Qa includes lights of the first, second, third and fourth wavelength bands, and at least the light of the fourth wavelength band only needs to vibrate in the first direction. That is, the illumination light emitted from the polarized illumination Qa only needs to mainly conta...

Embodiment approach 2

[0083] Figure 5 It is a block diagram showing a configuration example of an imaging device of the imaging system according to this embodiment. The imaging system of this embodiment differs from Embodiment 1 in that the imaging device has a third arithmetic processing unit. Therefore, in the following description, the third arithmetic processing unit will be mainly described.

[0084] In this embodiment, the third arithmetic processing unit is configured to process the fourth image information S104 so as to enhance the contrast of the image obtained from the fourth image information S104. The contrast-emphasized fourth image information S104 is then synthesized with each of the first image information S101 , the second image information S102 , and the third image information S103 in the second arithmetic processing unit S202 .

[0085] Figure 6 It is a graph explaining contrast emphasis. The image is a two-dimensional image, and in order to make the description easier to ...

Embodiment approach 3

[0087] Figure 5 It is a block diagram showing a configuration example of an imaging device of the imaging system according to this embodiment. The imaging system of the present embodiment differs from the second embodiment in that the third arithmetic processing unit performs normalization processing before the contrast enhancement processing. Therefore, in the following description, the normalization processing in the third arithmetic processing unit will be mainly described.

[0088] In the image based on the fourth image information S104 before the contrast emphasis processing, as Figure 6 As shown by the solid line in the graph of , when there is a gradient of the grayscale value W1, if the contrast enhancement process is performed directly, the contrast of the places other than the spots is also emphasized. As a result, in the synthesized image, the shading of the image other than the spots becomes stronger. Especially when the illumination illuminates the subject un...

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Abstract

An image pickup system disclosed in the present application comprises: an image pickup unit (IP); a first calculation processing section (S201); and a second calculation processing section (S202). The image pickup unit (IP) is constituted so as to acquire: first image information (S101); second image information (S102); third image information; and fourth image information (S104), based on polarised illumination whereby polarised light is emitted including an optical component that oscillates in a direction parallel with a first axis of polarisation, and light from a body to be imaged at the same time point, produced by said illuminating light. The first image information (S101) comprises information of the light in a first wavelength band. The second image information (S102) comprises information of the light in a second wavelength band. The third image information comprises information of light in a third wavelength band. The fourth image information (S104) comprises information of light in a fourth wavelength band which is the same wavelength band as a component of said light of said illuminating light that oscillates in a direction parallel with a second axis of polarisation different from the first axis of polarisation, emitted from said polarisation illumination and obtained by reflection from said body to be imaged. The first calculation processing section (S201) is constituted so as to generate first colour image information (S301) using the first, second and third image information. The second calculation processing section (S202) is constituted so as to generate second colour image information (S302) by respective combined processing of the first to said third image information, respectively, and the fourth image information.

Description

technical field [0001] The present invention relates to an imaging system for imaging living bodies such as skin. Background technique [0002] An imaging system for observing the skin of a living body has been developed. For example, Patent Document 1 discloses an imaging system for observing skin spots using ultraviolet illumination with a polarizing filter and an ultraviolet camera with a polarizing filter. [0003] Such an imaging system has polarized illumination for irradiating living tissue with light vibrating in the direction of a predetermined polarization axis. The predetermined polarized light becomes specularly reflected light maintaining the polarization component on the surface of the living body, and becomes diffuse reflected light having scattered polarization components under the living body surface. Therefore, by arranging a polarizing filter on the imaging device side that transmits light vibrating in a direction perpendicular to the polarization axis o...

Claims

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Application Information

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IPC IPC(8): A61B5/00A61B5/107G06V10/143
CPCA61B5/0077A61B5/0084A61B5/444A61B5/004A61B5/1032A61B5/1079A61B2576/02G16H30/40G06V10/143H04N23/56H04N9/643
Inventor 今村典广山形道弘是永继博
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD