A Survey on Different Fusion Techniques of Visual and Thermal Images for Human Face Recognition

In this paper we do a survey on different fusion techniques of visual and thermal images for human face recognition. Image fusion constructs a single image by combining information from a set of source images together using different techniques. It is quite simpler to extract and locate facial features in visual images. Another advantage of using visual image is that it works well under controlled illumination condition. Infrared (IR) imaging is especially useful to determine the location and shape of objects in darkness and provides information about the degree of heating of individual segment of complex surfaces. Now a days, researchers have explored the use of fusion of thermal infrared and visual face images for person identification to combine the good aspects of visual and thermal images and to overcome the negative aspects of individual thermal and visual images. The aim of fusion is to produce a fused result or image that offers the more detailed and reliable information than the source images. In our paper we discussed the different fusion techniques which is used to combine visual and thermal images for human face recognition.