期刊
SENSORS
卷 13, 期 3, 页码 2986-2996出版社
MDPI
DOI: 10.3390/s130302986
关键词
mid-infrared thermography; thermal lifetime image; nondestructive test; lettuce seed; seed viability
资金
- Korea Basic Science Institute Grant [D32200]
- Technology Development Program for Agriculture and Forestry, Ministry for Food, Agriculture, Forestry and Fisheries, Republic of Korea
- National Research Council of Science & Technology (NST), Republic of Korea [D32200, B551179120400, D33200] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
An infrared lifetime thermal imaging technique for the measurement of lettuce seed viability was evaluated. Thermal emission signals from mid-infrared images of healthy seeds and seeds aged for 24, 48, and 72 h were obtained and reconstructed using regression analysis. The emission signals were fitted with a two-term exponential model that had two amplitudes and two time variables as lifetime parameters. The lifetime thermal decay parameters were significantly different for seeds with different aging times. Single-seed viability was visualized using thermal lifetime images constructed from the calculated lifetime parameter values. The time-dependent thermal signal decay characteristics, along with the decay amplitude and delay time images, can be used to distinguish aged lettuce seeds from normal seeds.
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