Digital Hologram Coding
نویسندگان
چکیده
A digital hologram includes not only the light intensity but also the depth information of the 3D (dimensional) object. That is, both the whole amplitude and the phase infor‐ mation are necessary to reconstruct the original 3D object, which are included in the interference pattern between the reference light and the object light. Since a digital hologram signal has much different characteristics from general 2D signal, a particular data processing technique is required. In spite, both have the same goal to acquire im‐ age information from 3D world and to display it as realistic as possible to human vis‐ ual system (HVS). Thus, if the techniques based on the 2D-image are modified and some proper techniques for 3D image are added, they can be efficient enough to be applied to digital holograms [1, 2].
منابع مشابه
Computer Generated Hologram for SemiFragile Watermarking with Encrypted Images
The protection of the contents of digital products is referred to as content authentication. In some applications, to be able to authenticate a digital product could be extremely essential. For example, if a digital product is used as a piece of evidence in the court, its integrity could mean life or death of the accused. Generally, the problem of content authentication can be solved using semi...
متن کاملCompression of digital holograms for three-dimensional object reconstruction and recognition.
We present the results of applying lossless and lossy data compression to a three-dimensional object reconstruction and recognition technique based on phase-shift digital holography. We find that the best lossless (Lempel-Ziv, Lempel-Ziv-Welch, Huffman, Burrows-Wheeler) compression rates can be expected when the digital hologram is stored in an intermediate coding of separate data streams for r...
متن کاملDesign and Implementation of Digital Hologram Content Using Modified Depth Information
This paper proposes a method to manipulate digital hologram contents by manipulating and/or synthesizing the depth information. To synthesize digital holograms themselves in order to create new digital hologram contents. This paper uses both the depth information obtained by converting the disparity information by using a stereo matching method and that obtained by taking pictures with a depth ...
متن کاملDisplaying a high-resolution digital hologram on a low-resolution spatial light modulator with the same resolution obtained from the hologram.
In this paper, a fast method for displaying a digital, real and off-axis Fresnel hologram on a lower resolution device is reported. Preserving the original resolution of the hologram upon display is one of the important attributes of the proposed method. Our method can be divided into 3 stages. First, a digital hologram representing a given three dimensional (3D) object is down-sampled based on...
متن کاملThree-dimensional object recognition from single off-axis digital Fresnel hologram by wavelet matched filtering
An optoelectronic technique for 3D object recognition using single off-axis digital Fresnel hologram is demonstrated. Only one Fresnel digital hologram of the 3D object to be recognized is recorded. The electronic hologram is processed digitally to retrieve 3D object information encoded as a 2D digital image. Wavelet matched filtering is used to improve the discrimination capability of the corr...
متن کامل