It is possible that the camera specifications that you are entering into Pix4Dcapture’s app settings are incorrect. I have found that camera specifications published online are not always appropriate for planning missions for photogrammetric applications.
However, I anticipate that the latest version of Pix4Dcapture is reporting that you are capturing less image overlap with the custom camera in Pix4Dcapture’s app settings compared to what Pix4Dcapture was reporting when Parrot’s Sequoia was a selectable camera option because of a difference in how the camera’s parameters were defined. The latest version of Pix4Dcapture assumes that the camera has a perspective lens when you enter a custom camera in the app settings. Parrot’s Sequoia has a fisheye lens, so I believe that you are actually capturing more image overlap than what the latest version of Pix4Dcapture is reporting with your custom camera in the app settings.
If you have not seen any degradation in the quality of your results since the amount of image overlap that Pix4Dcapture reported changed and you see that the distance between adjacent flight lines is approximately the same as with previous versions of Pix4Dcapture, I recommend that you continue flying with the same workflow. The key thing to remember in this case is that you will capture more image overlap than what the latest version of Pix4Dcapture is reporting.
To ensure that Pix4Dcapture reports the most accurate image overlap possible, please confirm that you have entered the following camera model specifications in Pix4Dcapture’s custom camera app settings before you plan your next flight. You will still see that Pix4Dcapture reports less image overlap than you capture:
- Focal length [mm]: 3.98
- Sensor width [mm]: 3.6
- Image width [pixel]: 960
- Image height [pixel]: 1280
Please do not hesitate to let us know if you have any questions.