A very simple pinhole camera set-up has been built to diagnose the electron beam emittance of the ESRF. The pinhole is placed in the air next to an Al window. An image is obtained with a CCD camera imaging a fluorescent screen. The emittance is deduced from the size of the image. The relationship between the measured beam size and the electron beam emittance depends upon the lattice functions a...

Let’s design a simple camera system – a system that can record an image of an object or scene in the 3D world. This camera system can be designed by placing a barrier with a small aperture between the 3D object and a photographic film or sensor. As Figure 1 shows, each point on the 3D object emits multiple rays of light outwards. Without a barrier in place, every point on the film will be influ...

We present a novel approach to the calibration of an ultra wide angle fish eye lenses. These lenses have the field of view larger than 180◦, therefore the common calibration methods based on the classical pinhole camera model with a planar retina cannot be employed. A new camera model is proposed together with a calibration method for extracting its parameters. Experiments evaluating the propos...

Depth recovery is a central concern in computer vision, and many methods were proposed for the monocular depth estimation by zooming as well as focusing and irising. In the past, there are two distinct approaches in depth by zooming; one is from motion parallax along the optical axis using a pinhole camera model, and the other from defocus using a thin lens camera model. This paper presents a n...

Roots of Digital Techniques and Functions in Traditional Film Photography Photography is the result of combining several technical discoveries. Chinese philosopher Mo Di and Greek mathematicians Aristotle and Euclid described a pinhole camera in the 5th and 4th centuries BCE. From rudimentary forms like the pinhole camera and the camera obscura, Film and print photography has transformed with t...

An image super resolution reconstruction method was used to improve the spatial resolution of the thick pinhole imaging system and to mitigate the limitations of the image spatial resolution of the hardware of the image diagnostic system. The thick pinhole is usually applied into the diagnostics of the high energy neutron radiation image. Due to the impacts among its energy flux, spatial resolu...

OBJECTIVES Although transgenic mice have emerged as powerful experimental models of cardiovascular disease, methods for in vivo phenotypic assessment and characterization remain limited, motivating the development of new instruments for biologic measurement. BACKGROUND We have developed a single-photon emission computed tomography system with a pinhole collimator (pinhole SPECT) for high-reso...

Abstract High-resolution optical imaging through or within thick scattering media is a long sought after yet unreached goal. In the past decade, thriving technique developments in wavefront measurement and manipulation do not significantly push boundary forward. The diffusion limit still ceiling. this work, we propose that medium can be conceptualized as an assembly of randomly packed pinhole c...