A holographic projector comprises an image processing engine arranged to, a hologram engine and a display engine. The image processing engine is arranged to receive a source image for projection. The source image comprises a first colour component and a second colour component. The image processing engine is further arranged to form a first colour secondary image from the first colour component by nulling alternate pixel values of the first colour component in accordance with a first checkerboard pattern. The image processing engine is further arranged to form a second colour secondary image from the second colour component by nulling alternate pixel values of the second colour component in accordance with a second checkerboard pattern. The first checkerboard pattern is opposite to the second checkerboard pattern. The hologram engine is arranged to determine a first colour hologram corresponding to the first colour secondary image and a second colour hologram corresponding to the second colour secondary image. The display engine is arranged to form a first colour holographic reconstruction from the first colour hologram and a second colour holographic reconstruction from the second colour hologram.

A holographic projector comprises an image processing engine, a hologram engine, a display engine and a light source. The image processing engine is arranged to receive a source image for projection and generate a plurality of secondary images from a primary image based on the source image. The source image comprises pixels. Each secondary image may comprise fewer pixels than the source image. The plurality of secondary images are generated by sampling the primary image. The hologram engine is arranged to determine, such as calculate, a hologram corresponding to each secondary image to form a plurality of holograms. The display engine is arranged to display each hologram on the display device. The light source is arranged to Illuminate each hologram during display to form a holographic reconstruction corresponding to each secondary image on a replay plane. The primary image is selected from the group comprising: the source image and an intermediate image

Digital holographic microscopy and related image processing techniques are described. A hologram captured in an image frame is split into different depths while a new hologram is being captured. Image slices of the hologram are determined and using free space impulse responses that are pre-calculated at a different precision than processing operations using the holographic data. Each computation is calculated in parallel based on the number of available processing cores and threads. The image slices are combined into a 2D array or 3D array to permit further processing of the combined array to count and size particles in the image frame. The reconstructed hologram is displayed at a subsequent image frame than that used to capture the hologram.

Provided are methods of processing a holographic image and apparatuses using the methods. A method includes obtaining image data with respect to a three-dimensional (3D) object, obtaining interference patterns in a computer-generated hologram (CGH) plane by performing a Fourier transform on the image data, and generating a CGH with respect to the 3D object based on the interference patterns, wherein the Fourier transform is performed based on a focal length of an eye lens of an observer.

The present description may provide a method of generating a hologram measurement pattern for measuring image quality of holographic display, including: generating a test pattern and a common pattern including at least one grayscale bar; generating measurement pattern data by combining the common pattern with a frame of the test pattern; and generating the hologram measurement pattern by inserting a random phase into the measurement pattern data and an apparatus applied thereto, thereby more accurately measuring the quality of the 3D holographic image reproduced by the holographic display.

A holographic display system includes an eye tracker configured to determine a position of a feature of an eye, a light source configured to output image light, and a digital dynamic hologram. The digital dynamic hologram is configured to receive the image light from the light source. The digital dynamic hologram is further configured to spatially modulate the image light based on a target image to form a reconstructed image in the eye. The reconstructed image includes noise that is non-uniformly distributed across the reconstructed image based on the position of the feature of the eye.

A method and apparatus for converting first image data corresponding to a first depth and second image data corresponding to a second depth may be used for displaying a 3D image represented by the first image data and the second image data and performing FFT on the converted first image data and the converted second image data.

The present disclosure provides a method for calculating a light field distribution in the process of generating a computer-generated hologram, including: performing a three-dimensional modeling to an object for which a hologram is to be generated so as to obtain a three-dimensional model of the object; determining the luminous characteristics of each voxel of the three-dimensional model at various azimuth angles within a viewing angle range of the hologram to be formed; and calculating a light field distribution of the object light wave of each voxel on the holographic plane based on the luminous characteristics of each voxel at various azimuth angles within the viewing angle range of the hologram to be formed. The present disclosure also provides a method and a system for generating a computer-generated hologram.

System and methods for efficiently generating a high quality patterned-phase-only hologram that can be displayed on a single device. A digital image of a holographed subject is measured as a distribution of the intensity of pixels in the image, or as an intensity image, and uniformly partitioned into a plurality of non-overlapping image blocks. A phase mask is applied to each pixel in each image block and assigned a value in the range of [0,2). The pixels are modulated with a phase value corresponding to the value applied by the phase mask, creating a modified intensity image. A complex hologram is generated from the modified intensity image. The complex hologram is generated utilizing a fast hologram generation process and then converted into a patterned-phase-only hologram. A short sequence of the patterned-phase holograms can be displayed to enhance the visual quality of the displayed holographic images.

A method and apparatus for processing hologram image data capable of optimizing image quality of a hologram image are provided. The image processing method includes receiving input image data, reading a header included at a predetermined location in the input image data, and generating hologram data configured to display a hologram image by performing a Fourier calculation and pixel encoding on the input image data based on at least one parameter recorded in the header, wherein the at least one parameter recorded in the header includes at least one of depth information, scale information, and gamma information.