Subjective evaluation of speckle noise in electro-holography

In electro-holography, speckle noise is a serious problem because it deteriorates image quality. We focused on the quantization errors of electro-holography and performed a subjective evaluation to the effect of speckle noise. We evaluated reconstructed images of an object that had differences in the number of the point light sources representing the object and the quantization levels of computer-generated holograms (CGHs). We performed the subjective evaluation using Sheffe's method of paired comparison (Ura's variation). Through the evaluation, we confirmed the effect of quantization errors on speckle noise.