Images used as perspective restitution procedure input-data sets must be taken in "high-resolution mode" (600 dpi, “non-interpolated”).

​

In the case when image-file is too large, belonging image has to be reduced in size to just under 16 Mbytes (note that "high-resolution mode" which offers resolution of maximum 3264 X 2448 pixels for JPG image file-format, yields corresponding file size of about 3MB!).

​

Image enhancement must be done using i.e. “bilinear” interpolation, in order to be avoided increasing of its existing accuracy and details.