Delta

Photogrammetric Equipment

DeltaScan 5 is a professional model that is fully automatic film-roll system.

DeltaScan 4 is a manual roll. Both models are intended for roll-films up to 250 mm wide and 168 mm in diameter. It can scan cut images up to 300x300 mm in size.

DeltaScan 470 is a special large size model intended for 300x450 mm satellite images and satellite 300 mm wide films.

Pre-scan image with improper color balance and weak contrast

Scanner output after automatic settings have been applied

  DPS Delta |  Delta Scanner | PlanScan |

DELTA SCANNER - COLOR PHOTOGRAMMETRIC SCANNER

There are 3 different scanner models on the same mechanical basis. All scanners have the same resolution, geometric and radiometric parameters. All the models can scan cut images.

Geometric parameters

• The scanner provides a high resolution, which is 8 µm (3175dpi)

• Root mean square error of scanning does not exceed ±2 µm. The value of root mean square error is determined by scanning and measuring the control grid

• Scanner is supplied with a unit for scanning roll films up to 250 mm wide (300 mm for 300x450 model)

 Radiometric parameters

• Scanner is equipped with a SONY color linear CCD-sensor and a light source based on a power LED array: components that provide superb quality of output images

• Controller of the CCD-sensor provides an internal 12-bit storage for intensities within each color channel that is transformed by hardware into 8-bit output

• Scanner provides scanning of both color and black-and-white materials and the scanning software stores output as True Color (24 bit) or gray scale (8 bit) image files

• The scanning software automatically detects optimal values of exposition, contrast and gamma for each color channel

• Scanner can perform scanning in two modes: density linear and intensity linear, which provide optimal results for photographs of any quality

• Scanning time for a 230x230 image in True Color mode at a 16 µm pixel size is 15 minutes

• Scanning time for a 230x230 image in grayscale mode at a 16 µm pixel size is 6 minutes

Scanning software

• Works in single image or batch mode (for automatic model)

• Supports scanning to TIFF (uncompressed or JPEG) and BMP formats where the pixel size is a multiple of CCD pixel: 8, 12, 16, 24, 32, 128 µm

• Contains a powerful unit for correction and transformation of output images and automatic inner orientation

Technical specification

Typical scanning time for standard 230x230 mm photo

Automatic detection of optimal parameters for scanning:

• Quick prescan feature allows to build an image histogram, and then software automatically suggests optimal settings for further scanning: exposition, contrast and gamma for each color channel based on the histogram.

• In automatic film mode you can build summary histogram for whole film or any part of it.

• Users can set scanning parameters manually by simply clicking on the intensity histogram or on histogram of any color channel.

• The program immediately reflects the changes on the image.

• The program can build histograms for areas designated by user and perform image correction for these areas separately.

Scanning software capabilities:

•  Automatic detection of optimal scanning settings

• Manual setting of scanning parameters and transformation tables for each channel separately

• Scanning into Tiled TIFF, BMP and DIP formats where the pixel size is a multiple of minimal size: 8,12,16,24,32 …128 µm

• Density linear mode provides maximum detail and uniform distribution of pixel intensities around the image

• Scanning positives and negatives in straight and mirror modes

• The program can apply digital filters during scanning to reduce the noise of the image

• Geometric calibration and accuracy control by measuring the control grid

• Radiometric calibration and elimination of irregularity of the light source

• Generation of output images using only one or two color channels; saving color channels in separate files

• An option that allows automatic creation of zoom pyramid during scanning

• Logging every scanning process allows users to view settings for previous processes and restore them, if necessary

 Batch-processing mode:

•  Supports multiply jobs/setups per film

• Uses automatic frame-edge search

• Calculates summary film histogram in full film prescan mode to provide uniform film images

• Uses customized film layouts for films with arbitrary numerated frames

 Post-processing software

•  Image analysis and histograms

• Image correction and applying various filters to groups of raster files

• Resampling images into any other pixel size

• Merging/splitting color channels from/into separate files

• Splitting files into fragments or merging fragments into a single file

• Fast processing of raster files up to 4GB