Determination of intrinsic metric in the images

There are many Fotos available by now which were taken of the mesa from diverse directions.


Many features can be identified on several fotos. If the distance between two features is known, it will be  possible to prove the resolution and to reveal distortions. The distances must be determined with a foto which was taken from the zenith and which has the highest resolution. It is a basis for a calibration od other Fotos.

Framing points as a reference for leveling features

Surounding points lying nearly on the same level shall define a plane of reference.

18-point frame

On two selected fotos the same 18 features can be iden- tified. It is assumed that they have the same level on the surface. The first foto has been taken from zenith and has a resolution of only 30 cm per pixel, whereby the distan- ces between the 18 frame points are known. In the second foto distortions can be determined with it and be taken into account for further calculations. 

Meshing: Construction of 3D-models

A point cloud is conntected to a net of triangles and the foto is projected onto its surface.


By measuring the shift of a feature in a foto taken from a perspective view it is possible to deduce its height. Beside (x,y)-coordinates in the plane this way features get a height z. Thus each feature gets 3d-coordinates (x,y,z) in space and form a point cloud. The points are connected to net of triangles, onto which the foto is projected.


Written by Super User. Posted in Paragraph

The first image 35A72 from the so called 'Face of Mars', which was taken in 1976 by Orbiter 1 or A, was not available in Internet, but in magazins, books and TV. Later on all images were available in imq format on CD, which was at that time common, and these CDs can now be fetched from the Internet.

There are no more data available about the circumstances these fotos were taken, but they can be found in other sources or determined by your own. These original images have been taken from high above over a wide range, so landforms besides the mesa are also visible, from which the coordinates are known roughly, so that it is posible to calculate the resolution of the picture.

Knowing the resolution of the picture, the pixels themselves provide a scale for a map of the landscape. With the number of pixels in x- and -y-direction from a starting point to the end point, it is possible to calculate the distance between them by Pythagors' Theorem. In the following this has not only been done for image 35A72 but for overall 5 images, which allows to determin width and height of the image in a good precision. To avoid deviation from choosing start and end point, the concept of a slide gauge was used with parallel lines in an image edtior software.




We are pleased to welcome you on our homepage. Be informed on our online presence about research and results regarding the famous mountain on Mars in Cydonia Mensae region. As an oronym we continue to use the term 'Face of Mars', although the mesa only looked on the first fotos taken from it like face, lying half in shadow. These pictures are not a good example for pareidolia, the appearance of a face on the very first pictures is obvious. This does not apply for newer fotos, they do not show the appearance of a face. Only people who mean to identify a face on newer fotos may labour under pareidolia. But nevertheless the mesa has more properties, which are not usual for naturally formed mountains ...

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