A motion analysis which is the topics on video processing, is used for determining an object or a pixel move which direction and how far. During the motion analysis, the pixels sometimes can move less than area of a pixel. In these situations motions should be perceived at micro level. For this, pixels' decimal values which called subpixels must be determined and the motion must be detected in these sub-pixels. Materials science is one of the areas that is used to motion analysis. There are substantial techniques to increase reliability, robustness and practicableness of in the content of each using object in material science. Tensile test is one of these techniques. Tensile test make an inference about general characteristics of material such as stress and elongation at break. In this study, the micro level changes that are performed on subpixel taken real time videos' images during the tensile test determine using adaptive linear regression.