Abstract: Embodiments disclosed herein are directed to devices and methods for performing spatially-varying brightness correction of a flash image. The spatially-varying brightness correction utilizes a set of images that includes one or more images captured under flash illumination and one or more images captured without flash illumination, which are used to decompose one of the flash images or an image generated therefrom into a flash contribution image and an ambient contribution image. The flash contribution image and the ambient contribution image are recombined to generate a corrected flash image, and information about the flash module and/or scene is used to adjust the relative contributions of these images during recombination.

Abstract: A rapid simple process of making blue background imaged transparent negatives with "white" or transparent letters from high contrast black and white film. The film is exposed, developed and washed according to manufacturer's directions. The same film is then immersed into three different toner solutions, fixed, washed and dried. The product of the process, an imaged transparent negative with blue background and "white" or transparent letters, can be mounted as a slide.