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Showing posts from February, 2022

Week - 5 3D Tracking Continued...

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This week we will be focusing on creating an STMap to undistort images, 3D tracking using CameraTracker. First we load the footage to the node which is not undistorted, we will check the properties of the footage to check what type of lens, which camera and resolution type which was used to shoot the footage. After knowing the type of lens used we downloaded the checkered image of the lens type and   reformated the image,  added a grade node to establish the white and black points, added the LensDistort node -  estimates the lens distortion in a given image, either through Grid Detection or manual Line Detection. We now go to the properties of the lensdistort and in analysis we try to detect the lines. After Detecting we try to add, remove lines and make them as straight as possibles using points from one end to another end from vertically to horizontal keeping in mind that each vertical and horizontal planes contain a single straight line or else Nuke tries to Straight...

Week - 4 3D Workspace in Nuke

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This week we will be focusing on working in 2D and 3D space, 3D projection and Matte Painting. First I brought in a Jpeg of a subway and linked it to the viewer and pressed Tab so that it switches to 3D view. Add a 3d object in this case we are using cube as the 3D object for the texture of the cube I added a Checkerboard node and connected the img to the Checkerboard node. When we come back to 2D space we can see that the cube does not show up in order for it to be seen we use ScalineRender node -  When connected to a Scene  node, the ScanlineRender node renders all the objects and lights connected to that scene from the perspective of the Camera  connected to the C am  input. Connect Cam input to Camera node, the Bg input to Footage and the obj/scn to the scene. Now connecting the scanlinerender to the viewer now we can see the cube. Now c reate a card (geometry) node in the node graph and connect the card node into the scene. Add a grid node to the Card now the c...

Week - 3 2D Tracking: Tracker, Planar Tracker, Rotopaint, Match-moving

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For this week we were focusing on covering on topics such as tracker, planar tracker, rotopaint and match-moving. In the morning session we did several colour matching exercises using a reference shot and a match shot, added a grade node and used the blackpoint, whitepoint, lift and gain to colour match one image to another (the reference). The image that has the grade node we should use Ctrl+Alt+Shift and select the blackpoint and whitepoint in the colourgrade node. Lift and gain using the other image just Ctrl+Shift.  One important distinction we learnt was to also use the alt key when colour picking from the image that has the grade node attached to it, which basically tells the software to ignore the alterations made by the grade node and to colour pick from the original ungraded image.   I then inserted another footage a diner match and a diner reference file and following a similar process I inserted a grade node beneath the match and reference files, I then linked...

Week - 2 Intro to Nuke 2: Colour Theory Colour Grading and Colour Correction

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This week we take a look into Colour theory, Colour grading and Colour correction. I downloaded the assets and the footage given to us from the shared directory,  imported the still image of the of the brick wall and concrete pavement for the background and have it displayed on the footage. I then imported a jpeg image of a red postal box into the composition, On the Node graph I then tabbed and brought in transform to be able to scale the image and relocate the postal box at its now current position. Used the reformat node to get rid of the outline of the red postal box and then using unpremult - this node divides the input’s rgb channels by its alpha. If your input images are premultiplied, this can make color corrections more accurate. Used the colour correct node then used to premult - multiplies the input’s rgb channels by its alpha. F ollowed by merge which is linked to the background screen and the viewer. Screenshot of my node tree at a bigger scale, Proceeded to ...