Segmentation and Classification of Hand Gestures for Indian Sign Language with YCbCr and HSV Color Models with Dissimilar Signers Under Different Lighting Conditions using AlexNet
Keywords:Indian sign language recognition system, invariant background, independent signers, support vector machine, AlexNet
Indian Sign Language (ISL) Recognition System can be implemented by considering the signs as hand gestures and developing a hand gesture recognition system. The impact of illumination changes on the performance of segmentation and classification where different lighting conditions such as normal, bright, dim, and artificial light under different color spaces like RGB, HSV and YCbCr are studied, and performance parameters are analyzed. It is observed that YCbCr color space is effective for complex images with different illumination. Occlusions of the hand with the face put additional constraints on the segmentation process. The effect of the varied skin color of different signers is also subjected to the study in this work. In India/Kerala, the skin color of the people varies drastically. It is difficult to fix the pixel value of the skin color as it affects the segmentation process. It will select other objects with the same color as the skin in the background. These constraints are overcome by selecting large, connected components in the frame as hand and are segmented. After modeling and analysis of the input hand image, gesture classification is done using SVM and AlexNet to recognize the gesture. The accuracy obtained with SVM is 93.8% and with AlexNet is 98.5%.
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