Abstract: A system for electronic image signal processing is described for use in a system including high speed film scanning apparatus and residual based hierarchical storage and display apparatus wherein full resolution luminance and half resolution color signals are processed to directly generate tonescale corrected full resolution scene luminance signal for image encoding without the creation of full resolution intermediate RGB images.

Abstract: A motion picture telecine scanner interposes a motion picture negative or print film (10) in an optical light path (12) between a light source (14) and a pickup stage (16) that develops a plurality of separate color output signals (R, G, B). By balancing the scanner so that the pickup stage provides substantially equivalent output levels in the respective colors for color transmissions substantially equivalent to like transmissions through the base density of a negative film, substantial signal-to-noise performance is realized during negative scanning. The base density is provided during a calibration mode by an optical filter (44) that is inserted into the light path with the motion picture film removed. In addition, the optical filter (44) is kept in the light path (12) during motion picture print scanning without any loss in signal-to-noise performance.

Abstract: The present image sensor mounting system is particularly adapted to the mounting of a linear sensor array, of the type having a transparent window on a front surface and a thermal and electrically conductive back surface. The system provides superior electrical and thermal transfer characteristics. A heat sink having at least one flat surface is positioned to make thermal contact with the back surface of the image sensor. A multilayer circuit board having layers of conductive material separated by layers of insulating material and having an opening therethrough sufficient in size to accept the heat sink provides the system support. A metal plating extends from one surface of the board through the opening in the board to the opposite surface of the board with selected ones of the layers of conductive material making electrical contact with the metal plating. The heat sink is mounted in the multilayer circuit board opening in thermal and electrical contact with the metal plating.

Abstract: A method and apparatus is disclosed for operating CCD sensors of a telecine machine at full well potential during a conversion mode of operation and at 1/2 full well potential during shuttle mode operations. The disclosed method and apparatus optimize the signal-to-noise S/N ratio during the conversion mode of operation.

Abstract: An illumination system for a film scanner is disclosed which comprises a light source and optics for providing a line of light on a film. Light transmitted through the film is imaged onto photosensor elements such as CCD arays. In order to obtain a high quality electronic image, a xenon light source is used, color filters are included in the system to control the spectral content of the light provided to the film gate, and an integrating cylinder is used to provide a line of diffuse light on the film.

Abstract: A telecine scanner is selectively conformed to evaluate the dye densities characteristic of either negative or print film. The film is interposed in a light path between a light source and a pickup stage that develops a plurality of color output signals from the light passing through the film. Color channel filters included in the pickup stage have spectral passbands in the respective colors that are broad enough to include the spectral dye densities of both negative and print materials. The scanner sensitivity is further limited to a particular film material by inserting an appropriate shaping filter set into the light path, preferably between the light source and the film, for conforming the peak sensitivity of at least one of the passbands to the peak spectral density of the corresponding dye of the particular film material.