Quality evaluation of fruits and vegetables is of great concern as there is a shortage of unadulterated items on the market. Even unadulterated fruits and vegetables, especially those with soft tissue, cannot be stored for longer times due to physical and chemical changes. Moreover, damage can occur during harvest and in the post-harvest period, while preserving or transporting the fruits and vegetables. This work describes the use of a laser dynamic speckle imaging technique as a powerful optoelectronic tool for the quality evaluation of certain seasonal fruits and vegetables in an Indian market. A simple optical configuration was designed for developing the dynamic speckle imagining system to record dynamic specklegrams of the specimens under different conditions. These images were analysed using a cross-correlation function and the temporal history of specklegrams. The technique can be effectively adapted to the industrial environment and would be beneficial for all stakeholders in the field.

This study demonstrates the feasibility of a view-based method, the motion history image (MHI) to map biospeckle activity around the scar region in a green orange fruit. The comparison of MHI with the routine intensity-based methods validated the effectiveness of the proposed method. The results show that MHI can be implementated as an alternative online image processing tool in the biospeckle analysis.

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Laser biospeckle technique has been extensively used as a significant characterization tool to analyze the complex inner dynamics involved in both biological and non-biological processes. The technique has been widely applied in the field of biology, medicine and agriculture as well as in the chemical and pharmaceutical industries. Among the challenges in biology or agriculture, one of the tasks is the assessment of the local dynamics of biological specimens. We report on an optical imaging technique, the laser biospeckle to assess the local dynamics introduced on selected biological specimens subjected to mechanical and thermal loads. This study also aimed to explore the technique in detecting the early stages of biological activities. An experimental configuration of the biospeckle laser imaging technique was used to assess the monitoring and prediction of the bruising on fruit surfaces within a specified time. The methods utilized to interpret the biospeckle data allowed pre-disposition detection of the formation of internal bruising in the early stages after the occurrence of a mechanical or thermal impact.

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