Camera model Hasselblad L1D-20c, Drone2Map 2.3

Pål_Herman_Sund

Hi, Norwegian Distributor supportteam here.

Just had a supportcase for Drone2Map (2.3). Notice the camera model for Hasselblad L1D-20c is "way off" as it is defined in Drone2Map 2.3.

For example Principal Point in D2M 2.3 is defined as (mm) : 6.94, 3.98
In 2022.1.2 the same parameters are 0.03, 0.01 respectively (and still millimeters) !

Gives "interesting" results 😄

 

MarkBarker1

Hi @Pål_Herman_Sund,

You are correct, we do calculate principal point differently now in 2022.1.x. 

In Drone2Map 2.3, the origin point of image coordinate system is the image sensor's top left corner, x pointing to right and y pointing down. In Drone2Map 2022.1.x the origin point of the image coordinate system is the physical center of the image sensor, and x pointing to the right, and y point up. They are both measured in mm. Ideally, principal point should be very close to the physical center of the image sensor.