introduction: an efficient method of tomographic imaging in nuclear medicine is positron emission tomography (pet). compared to spect, pet has the advantages of higher levels of sensitivity, spatial resolution and more accurate quantification. however, high noise levels in the image limit its diagnostic utility. noise removal in nuclear medicine is traditionally based on fourier decomposition o...

The modeling i.e. the capturing of geometric information plays a key role for our fast growing urban communities. Until recently the process of capturing three-dimensional data was a labor intensive task, but with the advent of high resolution digital imaging instruments a high degree of automation is within reach. Urban architecture however, proves to be a very challenging territory for image-...

Automatic age estimation based on facial images is important but challenging in face recognition research. A Super-Resolution Reconstruction algorithm was proposed to implement the age estimation of facial images, which cut the facial image into small pieces. Then after building high resolution images by using the Super-Resolution Reconstruction algorithm, the RBF neural network was used to tra...

Previously, generative adversarial networks (GAN) have been widely applied on super resolution reconstruction (SRR) methods, which turn low-resolution (LR) images into high-resolution (HR) ones. However, as these methods recover high frequency information with what they observed from the other images, tend to produce artifacts when processing unfamiliar images. Optical satellite remote sensing ...

abtract background: in nuclear medicine, phantoms are mainly used to evaluate the overall performance of the imaging systems and practically there is no phantom exclusively designed for the evaluation of the software performance.  in this study the hoffman brain phantom was used for quantitative evaluation of reconstruction techniques. the phantom is modified to acquire tomographic and planar i...

conclusion vr reconstruction for both single-direction images and sushi using dti25 raw data provides excellent 3d displays of the peripheral nerves in the wrist region. sushi post-processing is a useful denoising tool because it automatically reduces the majority of isotropic object noise. results single-direction vr reconstruction clearly showed the nerves for both dti6 and dti25 but with obv...

Diffusion processes in the lumen of the endoplasmic reticulum of tissue derived cells are investigated using a computational approach based on the method of particle strength exchange. 3D reconstructions of the shape of the endoplasmic reticulum are made from micrograph sections and are then used to conduct direct numerical simulations of fluorescence recovery experiments. The influences of the...

Single particle reconstructions derived from electron micrographs yield increasing detail of biological molecules and assemblies. However, it is well-known that alignment of pure noise images against a reference can recover that reference on reconstruction [1]. The question is how to distinguish a reconstruction from noise from one from legitimate particle images. Figure 1A shows the estimated ...

There has been a lot of activity recently surrounding the reconstruction of photorealistic 3-D scenes and high-resolution images from video sequences. In this paper, we present some of our recent work in this area, which is based on the registration of multiple images (views) in a projective framework. Unlike most other techniques, we do not rely on special features to form a projective basis. ...