Data processing apparatus, data processing method, data processing program, optical element, imaging optical system, and imaging apparatus to select suitable wavelength for object detection
A data processing apparatus includes a processor, in which the processor executes data acquisition processing of acquiring spectral data of a plurality of subjects, calculation processing of calculating intensity characteristics at a first wavelength and a second wavelength selected from wavelength ranges of the acquired spectral data of the plurality of subjects based on a relationship between two wavelengths which are the first wavelength and the second wavelength, data conversion processing of converting the intensity characteristics calculated in the calculation processing into discrimination data of a specific subject for the wavelength range, and output processing of outputting the discrimination data to an outside.
1 . A data processing apparatus comprising:
a processor configured to execute
data acquisition processing of acquiring spectral data of a plurality of subjects,
calculation processing of calculating intensity characteristics at a first wavelength and a second wavelength selected from wavelength ranges of the acquired spectral data of the plurality of subjects based on a relationship between two wavelengths which are the first wavelength and the second wavelength,
data conversion processing of converting the intensity characteristics calculated in the calculation processing into discrimination data of a specific subject for the wavelength range, and
output processing of outputting the discrimination data to an outside,
wherein the intensity characteristic is an intensity difference, and is calculated according to the following expressions
the intensity difference=|[ A (λ1)− A (λ2)]−[ B (λ1)− B (λ2)]|
in a case in which spectral data of a first subject in the spectral data of the plurality of subjects is denoted by A(λ), spectral data of a second subject in the spectral data of the plurality of subjects is denoted by B(λ), and the first wavelength and the second wavelength, which are to be selected, are denoted by λ1 and λ2, respectively.
2 . The data processing apparatus according to claim 1 ,
wherein the discrimination data is a first map representing a change in the intensity characteristic with a wavelength as a variable.
3 . The data processing apparatus comprising:
a processor configured to execute
data acquisition processing of acquiring spectral data of a plurality of subjects,
calculation processing of calculating intensity characteristics at a first wavelength and a second wavelength selected from wavelength ranges of the acquired spectral data of the plurality of subjects based on a relationship between two wavelengths which are the first wavelength and the second wavelength,
data conversion processing of converting the intensity characteristics calculated in the calculation processing into discrimination data of a specific subject for the wavelength range, output processing of outputting the discrimination data to an outside,
wherein the discrimination data is a first map representing a change in the intensity characteristic with a wavelength as a variable, and
the first map is a two-dimensional map, and coordinate axes of the two-dimensional map are the first wavelength and the second wavelength,
receive a specific position on the first map displayed on the display device in response to a user indication,
specify a wavelength combination of the first wavelength and the second wavelength to be used for detection of a detection object among the plurality of subjects based on the specific position,
acquire a first image in a wavelength range including the first wavelength in the specified wavelength combination and a second image in a wavelength range including the second wavelength,
calculate a difference image between the first image and the second image, which are acquired, and
create a second map showing the calculated difference image.
4 . The data processing apparatus according to claim 3 ,
wherein a destination of the output of the discrimination data to the outside is a display device.
5 . The data processing apparatus according to claim 3 ,
wherein the processor executes
processing of extracting one or a plurality of positions on the first map at which the intensity characteristic exceeds a threshold value from the first map, and
processing of specifying one or a plurality of wavelength combinations of the first wavelength and the second wavelength to be used for detection of a detection object among the plurality of subjects based on the extracted positions.
6 . The data processing apparatus according to claim 5 ,
wherein a destination of the output of the discrimination data to the outside is a display device, and
the processor executes processing of displaying candidates for a specific position in the one or plurality of wavelength combinations of the first wavelength and the second wavelength in a superimposed manner on the first map displayed on the display device, processing of receiving the specific position from among the candidates for the specific position in response to a user indication, and processing of specifying the wavelength combination of the first wavelength and the second wavelength based on the received specific position.
7 . The data processing apparatus according to claim 3 ,
wherein the plurality of subjects include a first subject, a second subject, and a third subject,
in the data acquisition processing, spectral data of the first subject, spectral data of the second subject, and spectral data of the third subject are acquired,
in the calculation processing, two or more intensity characteristics, out of the intensity characteristics of the spectral data of the first subject and the spectral data of the second subject at the first wavelength and the second wavelength, the intensity characteristics of the spectral data of the second subject and each spectral data of the third subject at the first wavelength and the second wavelength, and the intensity characteristics of the spectral data of the first subject and the spectral data of the third subject at the first wavelength and the second wavelength, are calculated, and
in the data conversion processing, the two or more intensity characteristics are converted into two or more discrimination data.
8 . An optical element comprising:
a first wavelength selection element; and
a second wavelength selection element,
wherein the first wavelength selection element transmits a wavelength range of the first wavelength in the wavelength combination specified by the data processing apparatus according to claim 3 , and
the second wavelength selection element transmits a wavelength range of the second wavelength in the wavelength combination specified by the data processing apparatus according to claim 3 .
9 . An imaging optical system comprising:
the optical element according to claim 8 that is disposed at a pupil position or in a vicinity of the pupil position.
10 . An imaging apparatus comprising:
the imaging optical system according to claim 9 ; and
an imaging element that captures a first optical image transmitted through the first wavelength selection element and a second optical image transmitted through the second wavelength selection element, which are image-formed by the imaging optical system.
11 . A data processing method to be executed by a processor, comprising:
acquiring spectral data of a plurality of subjects;
calculating intensity characteristics at a first wavelength and a second wavelength selected from wavelength ranges of the acquired spectral data of the plurality of subjects based on a relationship between two wavelengths which are the first wavelength and the second wavelength;
converting the intensity characteristics calculated in the calculation step into discrimination data of a specific subject for the wavelength range; and
outputting the discrimination data to an outside,
wherein the intensity characteristic is an intensity difference, and is calculated according to the following expressions
the intensity difference=|[ A (λ1)− A (λ2)]−[ B (λ1)− B (λ2)]|
in a case in which spectral data of a first subject in the spectral data of the plurality of subjects is denoted by A(λ), spectral data of a second subject in the spectral data of the plurality of subjects is denoted by B(λ), and the first wavelength and the second wavelength, which are to be selected, are denoted by λ1 and λ2, respectively.
12 . The data processing method according to claim 11 ,
wherein the discrimination data is a first map representing a change in the intensity characteristic with a wavelength as a variable.
13 . A data processing method to be executed by a processor, comprising:
acquiring spectral data of a plurality of subjects;
calculating intensity characteristics at a first wavelength and a second wavelength selected from wavelength ranges of the acquired spectral data of the plurality of subjects based on a relationship between two wavelengths which are the first wavelength and the second wavelength;
converting the intensity characteristics calculated in the calculation step into discrimination data of a specific subject for the wavelength range; and
outputting the discrimination data to an outside,
wherein the discrimination data is a first map representing a change in the intensity characteristic with a wavelength as a variable, the first map is a two-dimensional map, and coordinate axes of the two-dimensional map are the first wavelength and the second wavelength,
receiving a specific position on the first map displayed on the display device in response to a user indication,
specifying a wavelength combination of the first wavelength and the second wavelength to be used for detection of a detection object among the plurality of subjects based on the specific position,
acquiring a first image in a wavelength range including the first wavelength in the specified wavelength combination and a second image in a wavelength range including the second wavelength,
calculating a difference image between the first image and the second image, which are acquired, and
creating a second map showing the calculated difference image.
14 . The data processing method according to claim 13 ,
wherein a destination of the output of the discrimination data to the outside is a display device.
15 . The data processing method according to claim 13 , further comprising:
extracting one or a plurality of positions on the first map at which the intensity characteristic exceeds a threshold value from the first map; and
specifying one or a plurality of wavelength combinations of the first wavelength and the second wavelength to be used for the detection of the detection object among the plurality of subjects based on the extracted positions.
16 . The data processing method according to claim 15 ,
wherein a destination of the output of the discrimination data to the outside is a display device, and
the data processing method further comprises:
displaying candidates for a specific position in the one or plurality of wavelength combinations of the first wavelength and the second wavelength in a superimposed manner on the first map displayed on the display device;
receiving the specific position from among the candidates for the specific position in response to a user indication; and
specifying the wavelength combination of the first wavelength and the second wavelength based on the received specific position.
17 . The data processing method according to claim 13 ,
wherein the plurality of subjects include a first subject, a second subject, and a third subject,
wherein spectral data of the first subject, spectral data of the second subject, and spectral data of the third subject are acquired,
wherein two or more intensity characteristics, out of the intensity characteristics of the spectral data of the first subject and the spectral data of the second subject at the first wavelength and the second wavelength, the intensity characteristics of the spectral data of the second subject and each spectral data of the third subject at the first wavelength and the second wavelength, and the intensity characteristics of the spectral data of the first subject and the spectral data of the third subject at the first wavelength and the second wavelength, are calculated, and
wherein the two or more intensity characteristics are converted into two or more discrimination data.
18 . A non-transitory computer-readable recording medium on which a program for causing, when read by a computer, the computer to execute the data processing method according to claim 13 is recorded.
19 . A data processing apparatus comprising:
a processor configured to execute
data acquisition processing of acquiring spectral data of a plurality of subjects,
calculation processing of calculating intensity characteristics at a first wavelength and a second wavelength selected from wavelength ranges of the acquired spectral data of the plurality of subjects based on a relationship between two wavelengths which are the first wavelength and the second wavelength,
data conversion processing of converting the intensity characteristics calculated in the calculation processing into discrimination data of a specific subject for the wavelength range, and
output processing of outputting the discrimination data to an outside,
wherein the intensity characteristic is an intensity difference or an intensity ratio, and is calculated by the following expressions
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in a case in which spectral data of a first subject in the spectral data of the plurality of subjects is denoted by A(λ), spectral data of a second subject in the spectral data of the plurality of subjects is denoted by B(λ), and the first wavelength and the second wavelength, which are to be selected, are denoted by λ1 and λ2, respectively.