| 摘要 |
A method is described of optically performing a joint transform correlation starting from images displayed side-by-side on a spatial light modulator (1) illuminated by a collimated light source (9). The image is focused by a lens (3) onto a camera (5), the image is recorded by a frame grabber (13), and processed by a computer (7). By using a two pass process, the result is a measure of the correlation of the images. The images may be preprocessed in a phase-encoded chequerboard pattern and binarised by thresholding based on the average value of neighbouring pixels. <IMAGE> |
