Images captured in low illumination environments can affect people’s judgment of image information. To raise the visual effect images and preserve integrity information, this study proposes two algorithms. One is an enhancement algorithm for illumination, which combines WASOBI denoising method deep adaptive gamma correction brightness adjustment images. The other equalization uneven lighting. T...

results the results show the artificial lighting obtained by difference methods of the overall lighting from natural lighting in closed blinds mode equal to 266 lux and night lighting 283.5 lux that they have no significant differences with each other (p = 0.269). as well as the illumination intensity obtained from a standard grid method is 283.5 lux and illumination intensity based on luminair...

The Soumi NPP VIIRS Day/Night Band (DNB) nighttime imagery quality is affected by stray light contamination. In this study, we examined the relationship between the Earth scene stray light and the signals in VIIRS’s calibrators to better understand stray light characteristics and to improve upon the current correction method. Our analyses showed the calibrator signal to be highly predictive of ...

Colposcopy is a primary diagnostic method used to detect cancer and precancerous lesions of the uterine cervix. During the examination, the metaplastic and abnormal tissues exhibit different degrees of whiteness (acetowhitening effect) after applying a 3%-5% acetic acid solution. Colposcopists evaluate the color and density of the acetowhite tissue to assess the severity of lesions for the purp...

The half-tone lithography using pixilated chromium masks in a projection stepper is an established technology in microoptics fabrication. However, the projection lithography tool is comparably expensive and the achievable lateral resolution is typically limited. By using pixel diffraction effects, binary and continuous profile lithography with submicron resolution can be installed on a conventi...

We present experimental methods and results for photo-response non-uniformity correction (PRNUC) in range a 3D flash LiDAR camera from non-optimal static-scene calibration data. Range walk is also corrected. This method breaks up the camera’s focal plane array (FPA) into 16 × windowed regions of interest that are incrementally captured stitched together post-processing across entire FPA. The il...

X-ray in-line holography is well suited for three-dimensional imaging, since it covers a large field of view without the necessity scanning. However, its resolution does not extend to range covered by coherent diffractive imaging or ptychography. In this work, we show full-field holographic x-ray based on cone-beam illumination, beyond limit given numerical aperture. Image information encoded i...