On the basis of digital speckle correlation

a matching algorithm which has a feature of "loop" traversal is proposed. Image acquisition system and simulated moving target are established and the time-sequence images of the target are acquired. Correlation matching calculation is perormed on the time-sequence images with a cross template. Moving trajectory of the target object within range of 2 mm×2 mm is obtained. Resolution of the trajectory on displacement is 0.025 mm. The experimental results demonstrate that the algorithm based on loop traversal can be used to track the moving trajectory of the target.