Information Processing Device, Information Processing System, And Information Processing Method

Patent metadata

Field	Value
Publication number	US-2023053797-A1
Application number	US-202217892447-A
Country	US
Kind code	A1
Filing date	Aug 22, 2022
Priority date	Aug 23, 2021
Publication date	Feb 23, 2023
Grant date	—

Abstract

An information processing device includes an image acquisition unit configured to acquire spectroscopic images for a plurality of spectral wavelengths as a captured image of an imaging target, a spectrum calculation unit configured to calculate an optical spectrum in each of pixels, based on the plurality of spectroscopic images, a feature wavelength detection unit configured to detect a feature wavelength of the optical spectrum in each of the pixels, a color set unit configured to calculate a feature angle corresponding to the feature wavelength in each of the pixels and set, as a feature color of a corresponding pixel, a color in the hue circle corresponding to the feature angle, and an image generation unit configured to generate a feature detection image obtained by converting each of the pixels of the captured image into the feature color corresponding to the pixel.

First claim

What is claimed is:

1 . An information processing device comprising:
an image acquisition unit configured to acquire a plurality of spectroscopic images for a plurality of spectral wavelengths as a captured image of an imaging target; a spectrum calculation unit configured to calculate an optical spectrum in each of pixels, based on the plurality of spectroscopic images; a feature wavelength detection unit configured to detect a feature wavelength corresponding to a predetermined feature condition of the optical spectrum in each of the pixels; a color set unit configured to calculate a feature angle corresponding to the feature wavelength in each of the pixels when a spectral wavelength range including the plurality of spectral wavelengths is allocated to a predetermined angle range of a hue circle, and set, as a feature color of a corresponding pixel, a color in the hue circle corresponding to the feature angle; and an image generation unit configured to generate a feature detection image obtained by converting each of the pixels of the captured image into the feature color corresponding to the pixel.

2 . The information processing device according to claim 1 , wherein
the angle range of the hue circle is 270 degrees or smaller.

3 . The information processing device according to claim 1 , wherein
the color set unit sets the feature color, with a shortest wavelength in the spectral wavelength range as a minimum angle in the angle range, and with a longest wavelength in the spectral wavelength range as a maximum angle in the angle range.

4 . The information processing device according to claim 1 , wherein
the color set unit sets the feature color, with a shortest feature wavelength, of the feature wavelengths detected in a plurality of the pixels, as a minimum angle in the angle range, and with a longest feature wavelength as a maximum angle in the angle range.

5 . The information processing device according to claim 1 , wherein
the feature wavelength detection unit detects n feature wavelengths corresponding to n feature conditions in each of the pixels and the color set unit calculates the feature angle, based on each of projection points obtained by projecting feature points on a straight line, the straight line being obtained based on the feature points corresponding to the feature wavelength in each of the pixels and being plotted in an n-dimensional space having each of the n feature conditions as an axis.

6 . The information processing device according to claim 5 , wherein
the straight line is a straight line with dispersion of the projection points corresponding to a plurality of the feature points maximized.

7 . The information processing device according to claim 5 , wherein
the color set unit sets the feature color, with one of two points most separated away from each other on the straight line as a minimum angle in the angle range and the other one as a maximum angle in the angle range.

8 . The information processing device according to claim 1 , wherein
the feature wavelength detection unit detects the feature wavelength, based on a secondary differential waveform of the optical spectrum in each of the pixels.

9 . An information processing system comprising:
the information processing device according to claim 1 ; and a spectroscopic camera configured to image the captured image including the plurality of spectroscopic images of the imaging target.

10 . An information processing method for causing one or a plurality of processors to process image information, the information processing method causing the one or plurality of processors to execute:
acquiring a plurality of spectroscopic images for a plurality of spectral wavelengths as a captured image of an imaging target; calculating an optical spectrum in each of pixels, based on the plurality of spectroscopic images; detecting a feature wavelength corresponding to a predetermined feature condition of the optical spectrum in each of the pixels; calculating a feature angle corresponding to the feature wavelength in each of the pixels when a spectral wavelength range including the plurality of spectral wavelengths is allocated to a predetermined angle range of a hue circle, and setting, as a feature color of a corresponding pixel, a color in the hue circle corresponding to the feature angle; and generating a feature detection image obtained by converting each of the pixels of the captured image into the feature color corresponding to the pixel.

Assignees

• Seiko Epson Corp

Inventors

• Kanemoto Kei

Classifications

• G01J3/2823 Primary

  Imaging spectrometer · CPC title

• G01J3/26

  using multiple reflection, e.g. Fabry-Perot interferometer, variable interference filters · CPC title

• G01N21/8851

  Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges (G01N21/8806 and G01N21/93 - G01N21/95692 take precedence; optical measurement of dimensions G01B11/00; optical scanning G02B26/10; image transformation G06T3/00; computerised image enhancement G06T5/00; image processing per se for flaw detection G06T7/0002) · CPC title

• G06V20/52 Primary

  Surveillance or monitoring of activities, e.g. for recognising suspicious objects (recognising microscopic objects G06V20/69) · CPC title

• G06V10/143

  Sensing or illuminating at different wavelengths · CPC title