I have notice that I get pixel stretching around buildings, cars and trees when generating the orthophotos. The orthophotos look distorted on these areas. what would be the solution.
If you see the distortion around the edges of buildings, cars, and trees, it is probably due to the way that the orthophoto is created. You can usually decrease that kind of distortion by taking greater image overlap or by taking pictures with a better resolution. If you’re stuck you may be able to use the orthomosaic editor to edit the blurry portions of the orthophoto.
The planar project will be more sharp, but the scale of the objects may change slightly, so planar should only be used for areas where you will not measure anything.