1. An imaging apparatus, said imaging apparatus comprising: at least one source of coherent radiation outputting a plurality of wavelengths illuminating an object creating a plurality of speckle patterns whereby each speckle pattern of said plurality of speckle patterns corresponds to one of said plurality of wavelengths; at least one sensor at a location relative to said object to determine a speckle pattern intensity of said speckle pattern for each of said plurality of wavelengths; a processor receiving information from said at least one sensor, said processor having means for constructing at least one autocorrelation of said object from said speckle pattern intensity of said speckle pattern; said processor further comprising means to compare at least one of said at least one autocorrelation: and said processor further comprising means to compare said at least one autocorrelation of said object to a second autocorrelation.