This week’s class was about 3D tracking and Projection, the project3D node projects an input image through a camera onto the 3D object. Firstly, we saw how to project texts on a video by using a card node, scene node, camera 3D node and scanline render node.
For the 3d patch – project on mm geo, first we need to find a mind point of the video and add a frame hold node then use the roto paint to do the cleanup, add a roto and use it on the cleanup areas so there won’t be any problem in QC We then have to give it a bluer on the edge to blend it in and add a premult, following which we add one more frame hold on the same frame. So now to project the clean-up in the moving camera, we needed to add a project node, card noes where the projection is taking place in the scene then a camera and scanline render, so in the project node add a frame hold on the same frame as before then attach a camera to that then to the project where you needed to attach the camera attach the 3D project to the card, card to the scene then scene to scanline render also added the camera to the scene and scanline render.
3d patch for project roto, from the plate, plug it into project3D then add a card at the area where you want to do the roto, plug the project3D at the cared img input, under that scanline render then roto after that project3D to revise it then copy past the same card from the top, one more scanline render, for the first scanline render just add a frame hold then for the project3D later gives the same frame hold for that last scanline render just add the camera without frame hold.
Project UV was fairly easy to understand than others, from that plate you needed to need to add project 3D then a card for which area you want then added the scanline render for that reader on the background. Add a square for changing the layout added your roto pant to do your clean up then change the settings to lifetime then premult it and add a reformat then copy paste the card from the top then scanline render and merge it with the plate add a camera to the project 3D and the last scanline render
Point cloud helps to visualise the video in 3D space so that adding an object or a card will be easy and you will know exactly if the object is teaching the floor or the safaris.
Poisson Mesh helps to visualise the video in 3D space and converts the point cloud to geometry.
Baked Mesh from pint cloud, to create this you need to change the select node to vertex and then select all the points from the point cloud then go to groups in the point cloud then create a group after that select the group then bake select groups to mesh this helps in geometry also. The other one is Bake select group this helps to understand where is your card placed in the 3d wold.
To work with the Model Builder geometry node, we need to add the camera and sounds to the node following which we go in the node and then create a card to match the corner with the object you want to cover and treat it as it is a corner point then play the video if you feel that it is going off the place move it to match it again.
For homework, we had to prep the room and then place the trackers and the grind.