Pixstat shapes

Once objects on a picture have been recognised by Pixstat according to the colour settings and to the threshold, their area is calculated directly from the number of pixels they have. This can be done for objects of any shape, provided only that they don't touch each other. For some predefined shapes, the length and width can also be estimated:

  rectangular objects (parallel sides, right angles)

  elliptic objects

  rounded objects (parallel sides, round ends)

  hexagonal objects (parallel sides, pointed end at 120°)

  pointed objects (parallel sides, pointed end at 90°)

  rhombic objects (pointed from the center to each end)

If objects cannot be clearly assigned to one of these shapes, then trying with differents shapes can help to decide by checking how much these settings can change the results.

For long objects, it is further necessary to indicate if they are curved or not, because curved objects are longer than their length as seen from any side:

  straight or short objects

  (long and) curved objects

  other objects (any shape, lenght and width not defined or not relevant)