PHOTOMOD ScanCorrect program is designed for correction of metric errors caused
by scanning of graphical data on the DTP scanners.
Transformation of raster image according to the scanner distortion field is used
for errors compensation. Scanner distortion field is computed from raster data
obtained by scanning calibrated material (regular grid or a set of crosses).
The basic principles of working with PHOTOMOD ScanCorrect are the following:
Inclusion of calibrated material into sequence of
scanning of graphic material to obtain distortion field
Formation of the distortion field using raster data
from the scanned calibrated material
Transformation of all raster data according to the
Analysis of precision characteristics of DTP scanners shows that scanner
distortion field is caused mainly by systematic scanner errors. Thus it is possible
to apply the distortion field created from one image when transforming another.
If original graphic material (for example photoimage) has calibrated crosses
on it, the technique remains the same, but distortion field is formed from
the same raster that is used in transformation. There is an option to input and
reckon with the table containing coordinates of the crosses.
Input and output data of the program is 1, 4, 8, and 24-bit files in Windows
BMP or TIFF formats. Auxiliary data (distortion field) is saved in ETM
The program allows fast converting of raster data:
From Windows BMP format to TIFF format
From TIFF format to Windows BMP format