Information processing device, information processing system, and information processing method

Patent metadata

Field	Value
Publication number	US-12467789-B2
Application number	US-202217892447-A
Country	US
Kind code	B2
Filing date	Aug 22, 2022
Priority date	Aug 23, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

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:
a spectroscopic camera configured to acquire a plurality of spectroscopic images for a plurality of spectral wavelengths as a captured image of an imaging target; a memory configured to store a program; and a processor configured to execute the program so as to:
calculate an optical spectrum in each of pixels, based on the plurality of spectroscopic images;
detect a feature wavelength corresponding to a predetermined feature condition of the optical spectrum in each of the pixels;
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 that is allocated to a predetermined angle range of a hue circle;
set, as a feature color of a corresponding pixel, a color in the hue circle corresponding to the feature angle; and;
generate a feature detection image obtained by converting each of the pixels of the captured image into the feature color corresponding to the pixel;
detect n feature wavelengths corresponding to n feature conditions in each of the pixels; and
calculate the feature angle based on each projection point 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.

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

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

4 . The information processing device according to claim 1 , wherein
the processor is further configured to set 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 predetermined angle range, and with a longest feature wavelength as a maximum angle in the predetermined angle range.

5 . The information processing device according to claim 1 , wherein
the straight line is a straight line in which dispersion of the projection points corresponding to the feature points is maximized.

6 . The information processing device according to claim 1 , wherein
the processor is further configured to set the feature color, with one of two points most separated away from each other on the straight line as a minimum angle in the predetermined angle range and the other one as a maximum angle in the predetermined angle range.

7 . The information processing device according to claim 1 , wherein
the processor is further configured to detect the feature wavelength, based on a secondary differential waveform of the optical spectrum in each of the pixels.

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

9 . 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 that is allocated to a predetermined angle range of a hue circle; setting, as a feature color of a corresponding pixel, a color in the hue circle corresponding to the feature angle; generating a feature detection image obtained by converting each of the pixels of the captured image into the feature color corresponding to the pixel; detecting n feature wavelengths corresponding to n feature conditions in each of the pixels; and calculating the feature angle based on each projection point 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.

Assignees

• Seiko Epson Corp

Inventors

• Kanemoto Kei

Classifications

• G06V10/143

  Sensing or illuminating at different wavelengths · 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

• G01J3/26

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

• G01J3/462

  Computing operations in or between colour spaces; Colour management systems · CPC title

• G01J3/2823 Primary

  Imaging spectrometer · CPC title