Recovering object information by holographic speckle imaging technique

In optical imaging systems, speckle acts as a type of noise that significantly degrades image quality. However, it is noteworthy that these speckle patterns contain abundant information about the physical properties of the object's surface, which can be utilized for the identification and detection of concealed targets. This paper will conduct an in-depth study on speckle noise in optical imaging. We propose speckle interference measurement to eliminate speckle noise to reconstruct the amplitude and phase information of the target object. We accomplish this by placing a reference point target next to the object and use interference measurements to eliminate speckle noise to reconstruct feature information of the target object. We used this method to process images and perform simulation analysis. The results show that this method can reconstruct important information from the speckled images, thereby verifying the feasibility of the method.