We implement wave front sensor-less adaptive optics in a structured illumination microscope. We investigate how the image formation process in this type of microscope is affected by aberrations. It is found that aberrations can be classified into two groups, those that affect imaging of the illumination pattern and those that have no influence on this pattern. We derive a set of aberration mode...

In this paper, a new approach is presented for improving image quality. It provides a new outlook on how to apply the enhancment methods on images. Image enhancement techniques may deal with the  illumination, resolution, or distribution of pixels values. Issues such as the illumination of the scene and reflectance of objects affect on image captures. Generally, the pixels value of an image is ...

Stray light is a critical aspect for high performance optical instruments. When stray control by design insufficient to reach the requirement, correction post-processing must be considered. This situation encountered, example, in case of Earth observation instrument 3MI, whose properties are complex due presence many ghosts distributed on detector array. We implement an iterative method and dis...

The alignment of the tapered illumination with the antenna's primary dish will not be perfect, and for ALMA has been speci ed as having an rms error of 0.1 dish radii at all frequencies, and the resulting image errors are therefore independent of frequency. If uncorrected, simulations indicate the e ects of this illumination o set will dominate both pointing and surface errors for ALMA's wide e...

Flash light of digital cameras is a very useful way to picture scenes with low quality illumination. Nevertheless, especially low-end cameras integrated flash lights are considered as not reliable for high quality images, due to known artifacts (sharp shadows, highlights, uneven lighting) generated in images. Moreover, a mathematical model of this kind of light seems difficult to create. In thi...

In rugged terrain, topography substantially influences the illumination and observation geometry, thus, bidirectional reflectance distribution function (BRDF) of a surface. While this problem has been known investigated for spaceborne optical data since 1980s, it led to several well-known topographic correction methods. To date, methods developed were equivalently applied airborne with distinct...

Malaria is a disease caused by plasmodium parasites transmitted through the bites of female anopheles-mosquito that infect human red blood cell (RBC). The standard malaria diagnosis based on manual examination thick and thin smear, which heavily depends microscopist experience. This study proposed system can identify life stages falciparum in RBC. image preprocessing process was done illuminati...

Unmanned airborne vehicles (UAV) equipped with novel, miniaturized, 2D frame format hyperand multispectral cameras make it possible to conduct remote sensing measurements cost-efficiently, with greater accuracy and detail. In the mapping process, the area of interest is covered by multiple, overlapping, small-format 2D images, which provide redundant information about the object. Radiometric co...

We present a novel approach for a combined homogenization and registration technique. Medical image data is often disturbed by inhomogeneities from staining, illumination or attenuation. State-of-theart approaches tackle homogenization and registration separately. Our new method attacks both troublemakers simultaneously. It is modeled as a minimization problem of a functional consisting of a di...

Recently, a new class of diffractive optical element called a photon sieve, which consists of a great number of pinholes, was developed for the focusing and imaging of soft x rays. In terms of the closed-form formula for the far field of individual pinholes and the linear superposition principle, we present a simple yet accurate analytical model for the focusing of the pinhole photon sieve. Thi...