Gul, NurayTora, HakanAirframe and Powerplant Maintenance2024-10-062024-10-06201619781509016792[WOS-DOI-BELIRLENECEK-193]https://hdl.handle.net/20.500.14411/9152Emotion recognition systems have an important role to play in the human-computer interactive applications (HCI). These systems are using facial features of face images and they are verifying or identifying the emotions. In this study, emotion identification algorithms are improved by using just mouth region features of a face. Region of interest (mouth region) is detected by Viola-Jones algorithms from video frames which are including different emotional face expressions. Outer boundaries of lip shapes are extracted by manually and calculated the scalar Fourier Descriptors (FDs) of the boundaries. Classification and recognition of the emotions is presented according to scalar FDs of lip contours. Test results are obtained as 93.9 % accuracy rate for scalar FDs.trinfo:eu-repo/semantics/closedAccessFourier Descriptorsimage processingobject recognitionEmotion identificationLip ContourConference Object17491752WOS:000391250900414