So far, visualization methods and the parameters are selected based on the reseacher experiences and his favor. We propose the effective combination of visualization methods and the parameters can be defined for the purpose from the view point of the human recognition. In this paper, we report our test method and the result to measure the recongnition difference between shading contour and line contour. As the result, we got the response time of shading contour was shorter than one of line contour. However, we did not get the difference of the correct answer raito.