|
Spirit 4K/2K/HD Film Scanner and DataCine
Digital Film Technology (DFT) products offer production professionals the most comprehensive
multi-format solutions for film acquisition, production, and post production. DFT digital film products
combine seamlessly to become the platform for digital intermediate, digital cinema, and video
mastering applications.
With more than 350 systems shipped worldwide in the past decade, the Spirit has become the undisputed preference for telecine and high-speed film scanning applications. Now the Spirit 4K® system offers a quantum leap in performance, with a maximum native resolution of 4k and with native 2k scanning available in real time.
The Spirit 4K system is available in two basic versions: a highperformance film scanner connected to a DFT Bones open post-production system via a high-speed Infiniband interface, which can be upgraded to a full-featured system that includes interfaces for standard- and high-definition (SD and HD) video; and a DataCine® which includes SD and HD video outputs and which can be enhanced with a Bones system, including 4k/2k highspeed Infiniband data interfaces.
Spirit 4K Film Scanner/Bones Combination
Digital intermediate production—the motion picture workflow in which film is handled only once for scanning and then processed with a high-resolution digital clone that can be down-sampled to the appropriate output resolution—demands the highest resolution and the highest precision scanning.
While 2k resolution is widely accepted for digital post production, there are situations when even a higher resolution is required, such as for digital effects. As the cost of storage continues to fall and ultra-high resolution display devices are introduced, 4k postproduction workflows are becoming viable and affordable.
The combination of the Spirit 4K high-performance film scanner and Bones system is ahead of its time, offering you the choice of 2k scanning in real time (up to 30 frames per second) and 4k scanning at up to 7.5 fps depending on the selected packing format and the receiving system's capability. In addition, the internal spatial processor of the Spirit 4K system lets you scan in 4k and output in 2k. This oversampling mode eliminates picture artifacts and captures the full dynamic range of film with 16-bit signal processing. And in either 2k or 4k scanning modes, the Spirit 4K scanner offers unrivalled image detail, capturing that indefinable film look to perfection.
The Spirit 4K Optical Path
Developed in partnership with Eastman Kodak, the Spirit 4K optical path uses a powerful xenon lamp for wide-spectrum illumination that passes through an integration cylinder for smooth diffuse light, reducing the visibility of scratches and dirt.
HD and SD Video Outputs
For quickly outputting film materials to video, the Spirit 4K DataCine system includes video output interfaces (optional on the Spirit 4K high-performance film scanner and Bones system combination). The system’s native 2k scan is converted to the selected video standard. You can then perform realtime continuous X-Y pan and zoom, anamorphic unsqueeze 2:1, independent X and Y sizing, format presets, digital outputblanking, and continuous 360° image rotation. You can add these processing functions to the combined Spirit 4K high-performance film scanner and Bones system to provide complete multi-format functionality.
Unmatched Color Performance
At the heart of the Spirit 4K system is the proven concept of a broad spectrum light source with a precision active-feedback loop to ensure consistency of image output, not just from moment to moment but across days, weeks, and months. Spirit DataCine users across the world have demonstrated that a color decision list can always be recalled with the confidence that it will be reproduced.
The Spirit 4K system uses a long-life 700W xenon lamp. Xenon illumination provides a broad and continuous spectrum of light across the entire visible area, with an emphasis in the critical short-wavelength blue area. The result is a consistently noise-free image right across the color spectrum, without problems in the blue portion that trouble other film-scanning technologies.
Like the original Spirit DataCine system, the xenon lamp output passes through an integration cylinder to create a highly diffuse light source. This diffuse light source has proved highly successful at minimizing the visible effects of film scratches and even some small dust particles.
In digital intermediate work, the normal practice is to scan the original camera negative to capture the best possible quality. The high blue content in the xenon light source of the Spirit 4K system is a significant aid in balancing out the orange mask of negative and intermediate stocks to achieve the most natural, most visually satisfying image quality. The Spirit 4K system features new lens gate assemblies designed for Super 16 mm and full-aperture 35 mm film that are capable of scanning the Standard and Academy versions. The optical system also includes a filter drawer to allow the use of standard camera filters for optical effects during scanning.
Signal Processing
From the lens gate, the light modulated with the film image goes to a beam splitter where it is divided optically into red, green, and blue components. Each color path has its own CCD sensor which has two CCD line arrays: one with 2,048 pixels for 2k scanning and one with 4,096 pixels for native 4k scanning.
The output from the CCDs is passed through low-noise pre-amplifiers prior to analog-to-digital conversion. From that point, all the digital signal handling and internal processing of the Spirit 4K system takes place at 16 bits up to the output stage for maximum dynamic range and headroom.
The internal spatial processor, which also operates at 16-bit quality, allows you to resize and crop an image as necessary. This processor also provides the precision downsampling you need to derive 2k images from 4k scans.
The Spirit 4K system includes standard and extended primary (RGB) color correction which can be controlled with a DFT GCP. As well, you can control a Spirit 4K system using, for example, a DaVinci telecine controller. You can also install a DFT 4k/2k film grain reducer and a 4k/2k six-sector color processor in the internal signal path of the Spirit 4K system for complete control over the texture and the color of the image output.
Effective Digital Intermediate Workflow
The Spirit 4K system brings an unmatched efficiency in creating a digital intermediate (DI) from film. The unsurpassed high scanning speeds are complimented by features to support a smooth and fast
scanning process.
The Spirit 4K platform includes a special set of scanner menus for the graphical control panel (GCP). These menus hide typical telecine controls and restrict control to those functions required for a DI transfer. This capability reduces the risk of setting the wrong parameters during transfers, which are not supervised by a colorist.
The AutoFocus feature of the Spirit 4K system automates the focusadjustment process and centers the focus corridor on the film emulsion. It offers a fast, easy, and accurate way of focusing at the beginning of the scanning process.
The matching process can be automated by the AutoDmin feature of the Spirit 4K system. It automatically neutralizes the color differences in the most transparent part of the film (Dmin) and sets it to the correct value for a DI transfer. In a current-settings mode the AutoDmin correction is based on density range (Dmax) settings taken from film stock or TK memories or from a user-defined Matching Lift adjustment. In a densities-settings mode you can preset the Dmax in a range of 0.1 to 3.5 densities.

High-Speed Infiniband Interface
Scanning film at 2k and 4k resolutions requires a high-speed data interface.With practical transfer rates in excess of 500MB/s, the Infiniband interface has no problem handling real-time 2k resolution files and can sustain 4k resolution output at rates up to 7.5 fps, depending on the selected packing format and the receiving system’s capability.
In addition, the Infiniband interface comes with an SXGA output that you can calibrate to monitor a high-resolution scan without a dedicated workstation. The Bones workstation provides an interface to external graphics and compositing systems.
Spirit 4K DataCine Application
The Spirit 4K DataCine scans film in 2k resolution, post processes and converts it into SD or HD output signals, controlled by a GCP and/or by a telecine controller. You can add processing such as six-sector color correction or grain reduction, as well as a Bones system to make use of the Spirit 4K system’s ability to scan to data. |