In this paper one investigation has been done to find the optimum level of fusion to find a fused image from visual as well as thermal images. Because of the use of face recognition system in critical areas like, authenticating an authorized person in highly secured areas, investigation of criminals, online monitoring etc, face recognition system should be very robust and accurate one. This work is an attempt to fuse visual and thermal face images at optimum level to extract the advantages of visual as well as thermal images. In our work, Object Tracking and Classification Beyond Visible Spectrum (OTCBVS) database has been used for the visual and thermal images. Among all the experiments a maximum recognition result obtained is 93%.

A rule-based expert system which uses generalized modus ponens (GMP) from fuzzy logic as a rule of inference is described here for classification of abnormalities related to rhythm disorder in the human heart, through interpretation of the patient's electrocardiographic (EGG) patterns. Application of GMP makes diagnosis of a wide range of variations in the input ECG patterns possible even if they differ from the patterns defined in the preconditions of the rules of the rulebase. The work shows how fuzzy logic with suitably drawn possibility distributions of variables of cardiological domain plays a significant role in making the expert system sensitive to finer variations of input ECG patterns, which are very common in bioelectric signals, without enhancing the size of the rulebase.

A new technique for generating a wide-band frequencymodulated sinusoidal carrier is presented. The frequency-modulated square-wave output of a voltage-controlled oscillator (VCO) is first filtered through a constant-Qswitched capacitor-type tracking bandpass filter (BPF) whose switched sinusoidal FM output is then passed through anRCtracking low-pass filter (LPF). The modulating signal itself is used to proportionally modulate the bias of a field effect transistor (FET), acting as the variable resistance in the LPF, so that a near perfect tracking is obtained. This ensures a very low-distortion frequency-modulated sinusoidal carrier at the output of the LPF. The conditions for ideal tracking have been presented, along with the description of an experimental circuit and test results.