Chinese Journal of Lasers, Volume. 23, Issue 10, 951(1996)
A Composite Filter for Addition and Subtraction of Images
In this paper, we introduce a composite filter for addition and subtraction ofimages. The filter consists of a Ronchi grating and an off-axis Fresnel zone plate. Thetransmission function is logic XOR operation of the Ronchi grating function and the Fresnelzone plate function. This method for images addition or subtraction has some advantages ofsimple optical setup, convenient adjusting and capability of processing large images. The principle of images addition and subtraction of using this filter is discussed. The fabricating method and the experimental results are reported.
Get Citation
Copy Citation Text
[in Chinese], [in Chinese]. A Composite Filter for Addition and Subtraction of Images[J]. Chinese Journal of Lasers, 1996, 23(10): 951