Modern digital still cameras sample the color spectrum using a color filter array coated to the CCD array
such that each pixel samples only one color channel. The result is a mosaic of color samples which is used
to reconstruct the full color image by taking the information of the pixels’ neighborhood. This process
is called demosaicking. While standard literature evaluates the performance of these reconstruction
algorithms by comparison of a ground-truth image with a reconstructed Bayer pattern image in terms
of grayscale comparison, this work gives an evaluation concept to asses the geometrical accuracy of the
resulting color images. Only if no geometrical distortions are created during the demosaicking process,
it is allowed to use such images for metric calculations, e.g. 3D reconstruction or arbitrary metrical
photogrammetric processing