Early detection of diabetic foot ulcers from thermal images using the bag of features technique

•Accurate, reliable and fastest end-to-end traditional ML algorithm for DFU diagnosis.•Early diagnosis by model development using plantar thermogram foot image database.•Adopting fully conventional ML algorithm approach with thermogram data.•Implementation of SIFT and SURF descriptors-BOF technique for DFU diagnosis.•Applicable for CAD real-time application to identify DM patient susceptible to DFU.