A low-cost 3-D printed smartphone add-on spectrometer for diagnosis of crop diseases in field

Owomugisha, Godliver; Mugagga, Pius K. B.; Melchert, Friedrich; Mwebaze, Ernest; Quinn, John A.; Biehl, Michael

doi:10.1145/3378393.3402252

Cited by 1 publication

(1 citation statement)

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“…Another aspect of our future work is to build a low-cost smartphone add-on spectrometer. In [37], we present our initial proof of concept towards this area. We built a low-cost spectral artifact (less than 5 USD) instead of using an off-the-shelf and expensive spectrometer (approximately 1000 USD).…”

Section: Discussionmentioning

confidence: 99%

Matrix Relevance Learning From Spectral Data for Diagnosing Cassava Diseases

et al. 2021

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We discuss the use of matrix relevance learning, a popular extension to prototype learning algorithms, applied to a three-class classification task of diagnosing cassava diseases from spectral data. Previously this diagnosis has been done using plant image data taken with a smartphone. However for this method disease symptoms need to be visible. Unfortunately for some cassava diseases, once symptoms have manifested on the aerial part of the plant, the root which is the edible part of the plant has been totally destroyed. This research is premised on the hypothesis that diseased crops without visible symptoms can be detected using spectral information, allowing for early interventions. In this paper, we analyze visible and near-infrared spectra captured from leaves infected with two common cassava diseases (cassava brown streak disease and cassava mosaic virus disease) found in Sub-Saharan Africa. We also take spectra from leaves of healthy plants. The spectral data come with thousands of dimensions, therefore different wavelengths are analyzed in order to identify the most relevant spectral bands for diagnosing these disease. To cope with the nominally high number of input dimensions of data, functional decomposition of the spectra is applied. The classification task is addressed using Generalized Matrix Relevance Learning Vector Quantization and compared with the standard classification techniques performed in the space of expansion coefficients.INDEX TERMS Cassava disease diagnosis, feature selection, matrix relevance learning, spectral data.

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Section: Discussionmentioning

confidence: 99%