How to train on other data

[gxu12]

Hi,
I just got other dental data in obj format, but I do not know how to label it correctly and create right json file, do you have any suggestions?
Thank you! @limhoyeon

[limhoyeon]

Im sorry for late reply.
plz check the data description on this web page.
You just need to fit your data into the same format as the challenge data.
Thanks.

[gxu12]

Hi,
Thanks for your respond. After viewing the page, I got to know how to label it under FDI standard, but I still do not know how to rotate my own data to the same angle as your dataset. Is there any way for me to handle this problem?
(All axes must be aligned as shown in the figure below. Note that the Y-axis points towards the back direction(plz note that both lower jaw and upper jaw have the same z-direction!)
Thank you! @limhoyeon

[limhoyeon]

you can use meshlab manually, or apply PCA to align axis automatically.

[gxu12]

you can use meshlab manually, or apply PCA to align axis automatically.

Really appreciate for yiur response! I just have one more question, I now already use mesh lab to manually align axis. But what is the logic between label and instance? the example is like, I found for different json files, the relation between “label” and “instance” is not fixed. For example, for obj1, maybe label = 9 is related to instance = 43, but for obj2, label = 9 is related to instance = 34. It makes me confused about the correct way to label.
Thank you very much! @limhoyeon

[coordxyz]

Hi @gxu12 , How did you align your custom data with the challenge data? Thx
(All axes must be aligned as shown in the figure below. Note that the Y-axis points towards the back direction(plz note that both lower jaw and upper jaw have the same z-direction!)

[limhoyeon]

@gxu12
'label' is related to the FDI tooth number.
'instance' is just the random number, which means the points which have same instance value belong to the same tooth.