Most high dynamic range image (HDRI) algorithms assume stationary scene for registering multiple images which are taken under different exposure settings. In practice, however, there can be some global or local movements between images caused by either camera or object motions. This situation usually causes ghost artifacts which make the same object appear multiple times in the resultant HDRI. ...

Calcifying odontogenic cyst (COC) is an odontogenic cyst with accumulation of ghost cells that has central and peripheral subsets. Here, we present an 11-year-old male patient with an intraoral swelling on the left posterior mandibular ridge interfering with eruption of the second molar. Histopathologic examination revealed a cystic lesion lined by ameloblast-like epithelium in the basal layer ...

Shih has objected to the semiclassical explanation for lensless pseudothermal ghost imaging—whose measurement configuration is shown schematically in Fig. 8 of [1]—that is reviewed by Shapiro and Boyd. In Shih’s view, the only valid explanation for lensless pseudothermal ghost imaging is nonlocal two-photon interference, i.e., a purely quantum phenomenon. Shapiro and Boyd also develop that expl...

Purpose Recently a controversy has arisen about so-called "ghost surgery" practices, and people have voiced their opinions for legal sanction against such practices, which clearly undermine the foundation of medical ethics. However, there has been a lack of legal basis for punishing those actions. The present study aims to examine which pre-existing legal provisions could be applied to regulate...

Ragy and Adesso argue that quantum discord is involved in the formation of a pseudothermal ghost image. We show that quantum discord plays no role in spatial light modulator ghost imaging, i.e., ghost-image formation based on structured illumination realized with laser light that has undergone spatial light modulation by the output from a pseudorandom number generator. Our analysis thus casts d...

High-resolution ghost image and ghost diffraction experiments are performed by using a single classical source of pseudothermal speckle light divided by a beam splitter. Passing from the image to the diffraction result solely relies on changing the optical setup in the reference arm, while leaving the object arm untouched. The product of spatial resolutions of the ghost image and ghost diffract...

We describe the ghost sector of cubic string field theory in terms of degrees of freedom on the two halves of a split string. In particular, we represent a class of pure ghost BRST operators as operators on the space of half-string functionals. These BRST operators were postulated by Rastelli, Sen, and Zwiebach to give a description of cubic string field theory in the closed string vacuum arisi...

Ghost tours, which purport to bring tourists into situations where they may encounter the paranormal, hinge on humanity’s near-universal fascination with the spirit world. Ghost belief has been a contentious and ubiquitous feature of human culture through recorded time. The ghost as a theoretical construct has spanned continents and societies, surfacing in entertainments and rituals alike. In A...

Many research workers have made an attempt to elucidate the nature of ghost cells by employing special histochemical methods, transmission electron microscopy, and scanning electron microscopy, and several hypotheses have been offered without any universal agreement. With the purpose of unraveling some of the facts regarding ghost cells with emphasis on their histogenesis, a comprehensive revie...