In this work, we evaluate the capabilities of a portable smartphone-based laser speckle imager for grading seeds based on the extent of biological activity related to germination inside seeds. The portable illumination device is attached to the rear side of a smartphone and externally controlled via USB port. Both RGB and laser speckle image sequences are simultaneously acquired through smartphone cameras for further processing. A custom image processing algorithm is used to generate the final spatio-temporal activity map. Our approach enables better grading of seeds prior to cultivation thereby potentially improving crop yields.
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