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    A mobile-based deep learning model for cassava disease diagnosis

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    U19ArtRamcharanMobilebasedInthomNodev.pdf (5.297Mb)
    Date
    2019-03-20
    Author
    Ramcharan, A.
    McCloskey, P.
    Baranowski, K.
    Mbilinyi, N.
    Mrisho, L.
    Ndalahwa, M.
    Legg, J.P.
    Hughes, D.P.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract
    Convolutional neural network (CNN) models have the potential to improve plant disease phenotyping where the standard approach is visual diagnostics requiring specialized training. In scenarios where a CNN is deployed on mobile devices, models are presented with new challenges due to lighting and orientation. It is essential for model assessment to be conducted in real world conditions if such models are to be reliably integrated with computer vision products for plant disease phenotyping. We train a CNN object detection model to identify foliar symptoms of diseases in cassava (Manihot esculenta Crantz). We then deploy the model in a mobile app and test its performance on mobile images and video of 720 diseased leaflets in an agricultural field in Tanzania. Within each disease category we test two levels of severity of symptoms-mild and pronounced, to assess the model performance for early detection of symptoms. In both severities we see a decrease in performance for real world images and video as measured with the F-1 score. The F-1 score dropped by 32% for pronounced symptoms in real world images (the closest data to the training data) due to a decrease in model recall. If the potential of mobile CNN models are to be realized our data suggest it is crucial to consider tuning recall in order to achieve the desired performance in real world settings. In addition, the varied performance related to different input data (image or video) is an important consideration for design in real world applications.
    https://dx.doi.org/10.3389/fpls.2019.00272
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6542
    Non-IITA Authors ORCID
    James Legghttps://orcid.org/0000-0003-4140-3757
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3389/fpls.2019.00272
    Research Themes
    PLANT PRODUCTION & HEALTH
    IITA Subjects
    Cassava; Disease Control; Plant Diseases
    Agrovoc Terms
    Cassava; Diseases; Plant Diseases; Diagnosis; Plant Condition; Tanzania
    Regions
    Africa; East Africa
    Countries
    Tanzania
    Journals
    Frontiers in Plant Science
    Collections
    • Journal and Journal Articles4127
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