Hello Mr. Vinther,
the image was created using a Michelson microscope interferometer, which creates only fringe images. Afterwards an ASCII-file was created with a fringe analyzing program for interferometry. So, Image Analyzer used the created ASCII file. The ASCII file containg only the points in a grid is showing again the fringes. The ASCII file was smoothed with the SMOOTH Filter of Image Analyzer under Filters function as the other filters are not available when an ASCII file is loaded. After smoothing the 3d image was created using the plugin for 3d generation.
Is the SMOOTH function a bidirectionally working filter ?
The following image is showing the grid lines of the ASCII file when it is created with the interferometry analyzing program:
http://rem-edx.de/grid.jpg The ASCII file is containing this point grid containing also the fringes.
The ASCII file can be loaded under http://rem-edx.de/fringe53b.txt
I think the problem is the same when triangulation fringe images are used for the 3d surface creation.
I do know that phase shifting in interferometry is solving the problem but this would only shorten the gaps between the fringes and therefore it is improving the resolution of images.
It is possible to shift manually the phase and to take a serie of shifted images which are combined using Image Analyzer. The result was showing broadened fringes and thinned gaps between the fringes. I suggest that this effect is the same if you interpolate the space between the fringes.
Is it possible to overlay a grid over the fringe image using a filter function ?
Is it possible to combine map files of shifted images ?
I suggest a Moir