Optical pattern recognition using correlation procedure for rotation- and scale-invariant feature extraction

<title>Optical image processing in Russia</title>

“…The above classification was perrormed in a hybrid system oontaining a joint transrorm optical correlator (JTC) interraced to a host computer which was used to perrorm the rotation or initial images and ror digital post-processing or the reature data. An algorithrn ror scene analysis Was also tested which includes the determination of object coordinates, reature selection using a training set or images and reature extraction ror all the objects present in the scene [6][7][8]. In the first oorrelator, the TV-SLM device was used to convert input images and another SLM was set to the Fourier plane .…”