Abstract: per describes the application of a newSpatial-Domain Convolution/Deconvolution transform (Stransform) for determining distance of objects andrapid autofocusing of camera systems using imagedefocus. The method of determining distance, named STM,involves simple local operations on only a few (about 2to 4) images and it can be easily implemented inparallel. STM has been implemented on an actual camerasystem named SPARCS. Experiments on the performance ofSTM and their results on real- world objects arepresented. The results indicate that STM is useful inpractical applications. The utility of the method isdemonstrated for rapid autofocusing of electroniccameras. STM is computationally more efficient thanother methods, but for our camera system, it issomewhat less robust in the presence of noise than aFourier transform based approach. STM is a usefultechnique in many applications such as rapidautofocusing.!23
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