  The speckle imaging is a photographic technique that resolves objects viewed
through severely distorted media. The results are insensitive to the errors
caused by apparent size of the isoplanatic patch and the telescope aberrations.
In this article, a short descriptions of the atmospheric turbulence and its
effect on the flat wavefront from a stellar source is presented; the
shortcomings of the conventional long-exposure images in the presence of
Earth's atmosphere are discussed. The advantages of the speckle interferometric
technique over conventional imaging are enumerated. The technical details of
the method, basic Fourier optics, data analysis procedures are also described.
