I have taken a series of overlapping oblique images of a building facade with an iPhone camera (with geotags) and generated a point cloud and orthomosaic in Pix4D. When I import the point cloud and orthomosaic into eCognition, it shows that the point at the ground adjacent part of the facade has a lower Z value and the point of the upper part has a higher Z value but I need “camera to facade distance” as Z value to help extract cracks on the facade using OBIA in eCognition.
Later I generated point cloud and mosaic by deleting geolocation information and selected “Arbitrary”
(output) coordinates in Pix4D. Still, the Z value is the height above the ellipsoid (according to WGS 1984), not the distance from camera position to facade. What can I do?!