Optical correlation detection can discriminate target from clutter scene by the optical method to realize target recognition. Wavelet transform is applied to hybrid optoelectronic joint transform correlator (HOJTC), it transcends the limitation of Fourier transform, and can analyze detected target in different quarters and scales. To exploit character of various scales, the method of wavelet multiscale product is proposed to extract edge feature of image. This method considers the detail and contour as well, and combines both of them at different levels. The problem of targets recognition with insufficient information is settled. Optical experimental results show that the method effectively enhances the energy of correlation peaks of target in clutter scene, successfully realizes target detection, and has a good prospect of application.