Rencay Feature List – Explaining Important Functions
The following product characteristics are important developments in Rencay’s technology and are valuable advantages of the Rencay digitization systems and the Rencay DiRECT camera systems.
Image Quality Characteristics
Superior image quality produces reproductions in high resolution, showing the finest details, no moiré effects, accurate color, and a high dynamic range
The unique features of Rencay’s engineering and design are explained under the Technology section of this website. In addition to the high-resolution of the image file, the precise reproduction of fine details, textures and other subject characteristics are very important. Especially with complicated originals, such as subjects with printed patterns or metallic surfaces, every characteristic will be perfectly reproduced.
⇨ Excellent color reproduction and smooth gradients even with difficult originals
⇨ Recording the finest details even in print rasters, metallic surfaces, etc.
⇨ True RGB 48-bit for optimal image quality
⇨ Always the required resolution — even for very large formats
The picture on the left shows a detail of a metal sculpture. The artist was not confident it could be reproduced properly with a digital camera system.
Color Accuracy und Color Management
Detail of a color chart
Spectrum of visible light – Color Matching Workflow: the colors from different spectra are transferred as exactly as possible into a standardized RGB color space
To have an effective color management workflow the characteristics of the camera system, the lighting and, of course, the properties of the original must be evaluated.
⇨ A color management workflow is indispensable for color-accurate scans
The Rencay technology provides the ideal system for color-accurate images, not only capturing the finest details but also recording subtle color gradations. With the addition of color matching workflows or ICC color management you not only get outstanding scans to match the original, but also a consistent and accurate workflow from capture to the printed output.
ICC Color Management Workflow
Color management software compares the scan of a suitable color chart with the manufacturer’s spectral data of the color chart and then calculates an ICC camera profile for that sensor, lighting and color chart. This ICC profile is later used to convert the image into a defined color space when these same capture conditions are used.
We will be pleased to advise you in the choice of an appropriate color chart and profiling software. Your specific application will be considered including how the scans are archived as a master TIFF and if they are required to meet the quality standards of the DFG or other standards such as Metamorfoze or FADGI.
Spectral Color Matching Workflow
This workflow uses the known spectral data of the scan system (specific lighting and camera system) spectral reference data for generic media samples to enhance the color accuracy and convert the scan to a defined color space. The results can be further improved by adding the user’s own spectral measurements of the original colors in the subject.
This workflow is particularly suitable for fine art applications. In today’s fine art market, artists are using modern colors with high saturation which can best be rendered to an RGB target color space using the Spectral Color-Matching workflow.
We will help you with the selection of the components required for the Spectral Color-Matching Workflow in connection with your application.
Shading Correction and Light Adjustment
⇨ Uniform Illumination
Uniform illumination is an important factor for perfect reproductions. Primarily, the Rencay Shading Correction tool is used to correct for any variation in brightness caused by light positioning or lens falloff. With this easy- to- use function, each scan will have completely even lighting over the full capture area.
⇨ Structure Lighting
Some subjects require asymmetrical lighting that is stronger from one direction in order to emphasize the painting’s texture or other subject characteristics. Lights can be manually positioned for the desired effect or you can use the remote Light Control unit to the brightness of each individual light.
⇨ Free Lighting Adjustment
When the lights are positioned to show more or less structure of the original, the subject illumination will be brighter on one side than the other. This is easily corrected by the use of the Shading Correction tool. A white card reference file is created that corrects for any lighting variations in the scanned image. This tool is helpful for any subjects requiring special lighting for textures, paper structures, reflective metals, or gold lettering and accents.
Shading Correction is fully integrated in the RenView scanning software. Special setups or custom cropped areas can be saved in the Job Manager and reloaded at any time, making it easy to add the correction to any scan.
Adjustments to The Final Scan
With difficult captures, such as series of glass negatives that have variations in density range, it is sometimes necessary to adjust the individual exposure settings when inspecting the finished scan.
⇨ Check the image quality immediately at 100% magnification
⇨ Apply settings changes immediately to TIFF Masterfile
This can be done inside the RenView scan software without the need to do another scan since the raw image data is held in the computer’s RAM memory. It is not necessary to waste time trying to get the perfect setting for each object before the scan. A few simple adjustments can be made to brightness or contrast while the image is active. When satisfied with the image results, one or more variations can be saved as a Tiff file or you can save a RAW format that can be reopened in RenView at a later time for further adjustments.
Parallelism and Distortion-free Scans
A simple optical tool is available to help adjust parallelism between the imaging plane and copy surface. Parallelism is extremely important to prevent any keystone distortion and assure corner-to-corner sharpness.
⇨ The LED alignment mirror makes it simple to align the camera body to the copy surface, even when the copy plane is at a difficult angle.
⇨ Quality assurance — it only takes a few minutes to check the alignment accuracy at any time
Define Output Resolution and Perfect Focus Functions
With a Rencay DiRECT camera system you have full control over copy size, output size, and depth-of-field.
The “Perfect Focus” function of the Rencay ScanUnit helps to find the optimal level of sharpness, even if the original is not perfectly flat or has large three-dimensional structures.
This unique system is searching for the point of optimal sharpness by comparing different levels of focus, analyzing and adjusting for the best overall focus plane. You can adjust this manually and refine the level of sharpness in millimeter steps from the RenView software on the computer or with buttons on the camera body.
⇨ Easy adjustment even when changing document sizes
⇨ Perfect sharpness due to multi-level analysis
All camera functions are easily and clearly controlled via the RenView software.
Reproducibility of Workflows
All digitizing workflows are always repeatable, regardless if they are standard setups or customized to your own specifications. The results will always be consistent and repeatable.
⇨ Quality assurance and confidence due to reproducible workflows
This is important in any type of work, but in particular, a project such as book digitization requires consistent results from the first page to the last page, even if the project lasts for years.
System Integration and Modularity
A Rencay DiRECT camera system is much more than a digital camera, with the versatility to be used alone or with interfaces to control and automate the camera stand or repro column movement. The Rencay DiRECT camera system becomes the center of a complete digitizing system that can be modified or extended to meet a customer’s specific requirements. Existing copyholders or vacuum walls can be incorporated, as well as lighting control systems and foot pedals or external signals to start a scan.
⇨ Modular and flexible systems
⇨ Easy to use
Rencay already offers complete digitalization systems. These can be modified or expanded according to customer requirements.
The Rencay FlashFocus projection system is built into the shutter cover on the 8k³, 12k³, 16k³ and 24k³ models. It projects 4 bright, flashing lights with a fine screen pattern through the camera lens onto the copy surface. Without the need to look through the camera, these lights will help you:
⇨ Adjust the focus
⇨ Adjust the area of capture
⇨ Position the original
Flash Focus is especially useful if you are working with a view camera with a Rencay ScanBack so you don’t have to replace the ground glass to position the camera. When used with a Rencay DiRECT camera system the fine adjustments using “Perfect Focus” making the workflow simple, fast and accurate.