发明名称 |
Freshness estimation method, freshness estimation apparatus, and non-volatile recording medium |
摘要 |
A freshness estimation method includes obtaining an absorbance spectrum that is obtained by irradiating an eye of a fish with light having all or part of a wavelength band from 315 nm to 450 nm; and estimating freshness of the fish by using a shape of the obtained absorbance spectrum. |
申请公布号 |
US9541496(B2) |
申请公布日期 |
2017.01.10 |
申请号 |
US201514702606 |
申请日期 |
2015.05.01 |
申请人 |
Panasonic Corporation |
发明人 |
Wakita Yumi;Ozawa Jun;Kondo Naoshi;Ogawa Yuuichi;Suzuki Tetsuhito |
分类号 |
G01N21/00;G01N21/31;G01J3/42;G01N33/12;G01N21/84 |
主分类号 |
G01N21/00 |
代理机构 |
Wenderoth, Lind & Ponack, L.L.P. |
代理人 |
Wenderoth, Lind & Ponack, L.L.P. |
主权项 |
1. A freshness estimation method comprising:
emitting, with at least one light source, light having all or part of a wavelength band from 315 nm to 450 nm, and irradiating an eye of a fish with the light; detecting, with a light sensor, an intensity of light reflected from the eye of the fish; calculating, with a processor, an absorbance spectrum based on the intensity of light detected by the light sensor; calculating, with the processor, an absorbance difference by subtracting an absorbance in a certain wavelength in a wavelength band from 315 nm to 380 nm from a peak value of absorbance in a wavelength band from 410 nm to 430 nm; determining, with the processor, whether the calculated absorbance difference is smaller than a predetermined threshold; and outputting an indication, via at least one of a visual output device or sound output device, when the calculated absorbance difference is smaller than the predetermined threshold, thereby indicating that the fish is fresh. |
地址 |
Osaka JP |