We investigate the SIDA virus images using two different techniques. Multiple beam modulated interference is considered since it gives contrasted images compared with two beam interference. The phase information of the image is extracted from the height depth. The second technique is based on speckle imaging of diffuser covered by the object information of SIDA image and compared with the ordinary subjective speckle image. Both speckle images are obstructed by uniform circular aperture. Discrimination between the two speckle images is attained as shown from the different plots
