Automatic analysis of facial expressions is rapidly becoming an area of intense interest in computer vision and artificial intelligence research communities. In this paper an approach is presented for facial expression recognition of the six basic prototype expressions (i.e., joy, surprise, anger, sadness, fear, and disgust) based on Facial Action Coding System (FACS). The approach is attempting to utilize a combination of different transforms (Walid let hybrid transform); they consist of Fast Fourier Transform; Radon transform and Multiwavelet transform for the feature extraction. Korhonen Self Organizing Feature Map (SOFM) then used for patterns clustering based on the features obtained from the hybrid transform above. The result shows that the method has very good accuracy in facial expression recognition. However, the proposed method has many promising features that make it interesting. The approach provides a new method of feature extraction in which overcome the problem of the illumination, faces that varies from one individual to another quite considerably due to different age, ethnicity, gender and cosmetic also it does not require a precise normalization and lighting equalization. An average clustering accuracy of 94.8% is achieved for six basic expressions, where different databases had been used for the test of the method.

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