Filtering and Processing IR Images of PV Modules

The aim of the paper is to propose a procedure to process InfraRed (IR) images of PV modules. In fact, when an IR image is acquired by thermo-camera, three possibilities can happen. The first one regards the acquisition of an IR image of a well-working PV module; in this case the IR image reveal no anomaly. The second case regards the acquisition of an IR image of a bad-working PV module; then, the IR image reveal clearly the anomaly. The third one regards the acquisition of an IR image, which gives no clear information about the health of the PV module. In this last case, the uncertainty can be totally or partially removed only after filtering and processing the IR image. Proposed procedure and tools have been applied on IR images of real PV modules