topic Re: Camera model Hasselblad L1D-20c, Drone2Map 2.3 in ArcGIS Drone2Map Questions

Camera model Hasselblad L1D-20c, Drone2Map 2.3

Pål_Herman_Sund — Mon, 19 Dec 2022 13:32:19 GMT

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 😄

Re: Camera model Hasselblad L1D-20c, Drone2Map 2.3

Pål_Herman_Sund — Thu, 22 Dec 2022 10:29:29 GMT

Having played a little with Site Scan and Drone2Map - I guess the calculation of the Principal Point has changed between using pix4d (current Site Scan and D2M 2.3) and D2M 2022.x. Nice if this may be confirmed. Thanks

Re: Camera model Hasselblad L1D-20c, Drone2Map 2.3

MarkBarker1 — Thu, 26 Jan 2023 23:01:00 GMT

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.

Re: Camera model Hasselblad L1D-20c, Drone2Map 2.3

Pål_Herman_Sund — Fri, 27 Jan 2023 08:11:38 GMT

Thanks for the confirmation @MarkBarker1