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Chlorophyll fluorescence (CF) is a direct indicator of plant physiology and reflects the photochemical process and its efficiency. CF is difficult to quantify because it is included in the reflected light. In the present study, the interrelationships between chlorophyll fluorescence parameters and spectral reflectance measured in the first, second, third and fourth leaves from the top of plant from...
Leaf area index (LAI), as an important characterization parameter, reflects the canopy structural characteristics of crops. It is commonly used to estimate foliage cover, as well as forecasting crop growth and yield [1,2,3]. Because LAI is functionally linked to the canopy spectral reflectance, its retrieval from remote sensing data has prompted many investigations and studies in recent years. The...
Unmanned Aerial Vehicles (UAV)-based remote sensing offers great possibilities to acquire in a fast and convenient way field data for precision agriculture applications. The UAV-based multispectral images with five wavebands (490, 550, 671, 700, 800 nm) were obtained at five growth stages from consecutive two years' wheat field experiments with different combinations in variety, N application rate...
Rapidly growing applications on smartphones have provided an excellent platform for mobile visual search. Most of previous visual search systems adopt the framework of ”Bag of Words”, in which words indicate quantized codes of visual features. In this work, we propose a novel visual search system based on ”Bag of Hash Bits” (BoHB), in which each local feature is encoded to a very small number of hash...
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