When the nonnegative system of linear equations y = Px has no nonnegative exact solutions, block-iterative methods fail to converge, exhibiting, instead, subsequential convergence leading to a limit cycle of two or more distinct vectors. From the vectors of the limit cycle we extract new data, replace the data vector y with this new data vector, and restart the iterative process. Success with t...

Tomographic reconstruction is a method of reconstructing a high dimensional image with a series of its low dimensional projections, and the filtered backprojection is one of very popular analytical techniques for the reconstruction due to its computational efficiency and easy of implementation. The accuracy of the filtered backprojection method deteriorates when input data are noisy or input da...

-As the world advances with technology and research, images are widely used in many fields such as biometrics, remote sensing, reconstruction etc. This growth in image processing applications, demands majorly for low power consumption, low cost and small chip area. Thus the advances in the VLSI system provides powerful tool for complicated imaging systems. A flexible architecture presents for a...

This paper presents a novel reconstruction algorithm for binary tomography based on the movement of particles. Particle Aggregate Reconstruction Technique (PART) supposes that pixel values are particles, and that the particles can diffuse through the image, sticking together in regions of uniform pixel value known as aggregates. The algorithm is tested on four phantoms of varying sizes and numb...

Accuracy and speed of algorithms play an important role in the reconstruction of temperature field measurements by acoustic tomography. Existing algorithms are based on static models which only consider the measurement information. A dynamic model of three-dimensional temperature reconstruction by acoustic tomography is established in this paper. A dynamic algorithm is proposed considering both...

This work focuses on tomographic image reconstruction in experimental fluid mechanics (TomoPIV), a recently established 3D particle image velocimetry technique. Corresponding 2D image sequences (projections) and the 3D reconstruction via tomographical methods provides the basis for estimating turbulent flows and related flow patterns through image processing. TomoPIV employs undersampling to ma...

In this paper we introduce silhouette constraints to improve the quality of unconstrained 3D face reconstruction. Previously, state of the art unconstrained 3D face reconstruction techniques relied solely on photometric consistency and matching sparse facial landmarks. We show that constraining the silhouettes of the 3D reconstruction to match silhouettes in the input images can further improve...

Background/objective The purpose of this study was to elucidate the biomechanical differences between anterior cruciate ligament (ACL) grafts reconstructed by isometric and anatomic reconstruction techniques, based on their length changes. Methods One hundred and thirty-three knees with primary ACL reconstruction using the bone-patellar tendon-bone (BTB) graft were retrospectively identified....

Electron tomography usually suffers from so-called “missing wedge” artifacts caused by limited tilt angle range. An equally sloped tomography (EST) acquisition scheme (which should be called the linogram sampling scheme) was recently applied to achieve 2.4-angstrom resolution. On the other hand, a compressive sensing inspired reconstruction algorithm, known as adaptive dictionary based statisti...