-
Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:
- Tag FS2020 specific questions with the MSFS2020 tag.
- Questions about making 3D assets can be posted in the 3D asset design forum. Either post them in the subforum of the modelling tool you use or in the general forum if they are general.
- Questions about aircraft design can be posted in the Aircraft design forum
- Questions about airport design can be posted in the FS2020 airport design forum. Once airport development tools have been updated for FS2020 you can post tool speciifc questions in the subforums of those tools as well of course.
- Questions about terrain design can be posted in the FS2020 terrain design forum.
- Questions about SimConnect can be posted in the SimConnect forum.
Any other question that is not specific to an aspect of development or tool can be posted in the General chat forum.
By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.
Why does the back project fail to detect vegetation when I use a 3-channel TIFF file? The result inside the observation frame is black
- Thread starter zhangzz
- Start date
对不起，我不明白你的意思
- Messages
- 34,312
- Country
Back project uses sample of what you want to detect. They are shown on the samples tab (next to the properties tab). So you will have to select how trees look first by making samples before something is detected.
But I think I would try the SVM or MLP steps first. They use AI algorithms and will work better I think.
But I think I would try the SVM or MLP steps first. They use AI algorithms and will work better I think.
hi arno I don't have a sample in my samples, how do I add it? Also, does SVM or MLP require a four-channel graph? I don't have a four-channel tiff file
- Messages
- 34,312
- Country
No, all of these steps can work with 3 or 4 band images. It's just that without a near Infrared band it's sometimes harder to differentiate trees and shadows.
If you active the samples tab you can drag with your mouse in the image to select an area that represents what you want to detect.
If you active the samples tab you can drag with your mouse in the image to select an area that represents what you want to detect.
Can I just replace the back project with mlp or SVM?
- Messages
- 34,312
- Country
Yes, but for the MLP or SVM step you will have to provide sample points for the algorithm (to indicate what you want and don't want to detect). Also you need to run a cluster step before, as the input includes a cluster image. Check the manual for some samples. I should probably make a new video about this one day as well.
It's better to come up with an instructional video, which is more complicated for a newbie like me 。 haha，Looking forward to your instructional videos！