Abstract:Extracting the infrared image chip exothermic area at a circuit board is an important part of the fault detection system. The traditional extraction methods to exothermic area of chip need manual intervention more or less, and the effects of artificial participation aren’t ideal at these circuit boards such as the more chips and complex heat radiation. this algorithm put forward a multi-objective region growing arithmetic according to the features of infrared images of a circuit board, which combine with GVF-Snake model to extract infrared image of circuit board. this algorithm can ensure original outline of GVF-Snake model by using the growing area and draw the exothermic area of chips by GVF model. The experiment results show that we can extract accurately exothermic areas of all circuit board chips without manual intervention .And the algorithm have practical and robust traits.