Comparing Meshes in Meshlab
HTML-код
- Опубликовано: 23 май 2023
- This video demonstrates visual and quantitative tools for comparing meshes in Meshlab and the outputs that can be generated from the comparisons. Specifically, I compare 2 skulls generated (many years ago) with Mimics software--same CT, same segmentation mask, but different 2D to 3D reconstruction algorithms.
Meshlab 2020.02 (portable): github.com/cnr-isti-vclab/mes...
Meshlab 2022.02 (stable): github.com/cnr-isti-vclab/mes... 
Наука
Hi Terrie, Thanks for the video. I've got one little tip for you: the font size of the text in the bottom-right window can be adjusted by holding CTRL and rolling the mousewheel ;-)
Ooh that's nifty! Thank you!
@@terrie3D Thanks for your videos. Here's another one: you can toggle ortho view by hitting 5 on your numpad
Hi Terrie, very nice video. The two meshes must be overlapped to be compared? How would one do that? Also, are there any software(s) that are able to compare two meshes without overlapping them? Thanks very much.
Thanks Carlo! You can still use Meshlab-you just have to align the meshes. I have a written tutorial that includes alignment here: github.com/terrielsimmons/Processing_Scans_in_Meshlab. I might make a video as well to demo something like scaling and aligning a photogrammetry scan with a laser scan.
I have finally made a video showing how to align 2 meshes in Meshlab! ruclips.net/video/30bJcj6yA4c/видео.htmlsi=L9hNo6I-5MZvSznx
@@terrie3D Thanks so much!
Hello!
Thank you for the video, it's great and help a lot!
When you have the PLY file with the numbers, there are values for X, Y and Z twice... one called "normal". What it means?
My goal is to compare a superimposition of images that are not the same (comparison of a pre- and post-operative skull) and I want to take measurements of some specific points.
When I obtain the data for each point, which of the values should I use to make the comparison? From the first row X, Y, Z or from the row called "normal X, Y, Z"?
I don't know if you will understand my question, but I would really appreciate it if you could help!!
The first set of x-y-z is the 3D coordinate for a point. The normal x-y-z is telling you a direction. You can apply the same measurement tools between a point cloud and a surface too--for example if you have a set of cranial landmarks to represent one skull and a surface to represent the other.
@@terrie3D Thank you very much for responding!
The "distance from reference mesh" function is not working in the version of the program that I was able to download. I'm having to use the Hausdorff distance tool. Even if you don't get the scale with negative numbers, is it a reliable analysis?
Can I use the same colorize by vertix quality tool to obtain the heatmap?
@@bibianamello which version of Meshlab did you download? I am using 2022.02 and it is working. The Hausdorff distance tool is still good--it's just giving you an absolute value but if you can see the overlay of your meshes and see where one is inside the other then that lets you know the direction. Yes the colorize by vertex quality still works with the Hausdorff distance.
I'm using 2023.12 version.. but great! I think with that I have what I need! Thank you!!!@@terrie3D
@@terrie3D I'm using 2023.12... but great, I think I can get what I need this way!
If you let me, one more question... I read on a forum that the first line of value (absolute measures) are measured in length units (for example millimeters). It is true? Can I consider the difference in point values as a difference in mm?