Month: November 2022

Shuffle

Shuffle lets you:

1. rearrange up to 8 channels from a single image (B input). For example, you can use it to swap rgba. red for rgba. green, and vice versa,
2. rearrange channels between two separate nodes (A and B input), like a foreground and background branch.
3. replace a channel with black (removing the alpha channel, for example) or with white (making the alpha solid, for example),
4. create new channels.

PlanarTracker

PlanarTracker is a powerful tool for tracking surfaces that lie on a plane in your source footage. Planar tracking is often better than tracking individual points (with the Tracker node for instance) as it takes a great deal more information into account and gives you a more accurate result. A rigid surface, like a wall or a side of an object, are good planes to track. You can use your tracking results to replace the tracked plane with another image for instance. You can define the region to track by creating and animating roto shapes.

Conerpin 2D

The CornerPin2D node is designed to map the four corners of an image sequence to or from positions derived from tracking data. In practice, this node lets you replace any four-cornered feature with another image sequence. You can use it to place an image in an on-screen television, for example.

Before using this node, you should use the Tracker node to generate four tracks, one per corner, on the feature requiring replacement.

Convolve

G

Color：Logarithmic and Line

Colorcorrect(pressing C on Node Graph)

The ColorCorrect node is used to make quick adjustments to contrast, gamma, gain, and offset. You can apply these to a clip’s master (entire tonal range), shadows, midtones, or highlights.

You can control the range of the image that is considered to be in the shadows, midtones, and highlights using the lookup curves on the Ranges tab. However, do not adjust the midtone curve – midtones are always equal to 1 minus the other two curves.

OCIOColorSpace

Much like the standard ColorSpace node, you can use the OCIOColorSpace node for converting an image sequence from one colorspace to another. The OCIOColorSpace node is based on the OpenColorIO library.

Blur:

Erode blur

Similar to Erode (filter) , but smoother, input pixels are filtered relative to the size  control. Negative values cause brighter areas to expand into darker areas and positive values cause darker areas to expand into lighter areas – particularly useful with mattes. Additionally, you can add blur to the input using the blur  and quality  controls.

In this lesson, we learned about tracker.

2D tracker that allows you to extract animation data from the position, rotation, and size of an image. Using expressions, you can apply the data directly to transform and match-move another element. Or you can invert the values of the data and apply them to the original element – again through expressions – to stabilize the image.

Combine alpha

Channelmerge

The ChannelMerge node lets you merge together one channel from each input and save the result in the selected output channel. All other channels are copied unchanged from the B input.

If no A input is connected, both channels to merge are taken from the B input.

By default, ChannelMerge combines the inputs’ alphas.

Grade (pressing G on Node Graph)

Lets you define white and black points by sampling pixels from the Viewer. Setting the brightest parts of the image to pure white and the darkest to pure black in this manner can help you add punch to overexposed images, for example. You can also use this node for matching foreground plates to background plates.

To sample pixels from the Viewer, click on a color swatch to the right of the control you want to set. The eye dropper icon appears. In the Viewer:

1. Ctrl/Cmd+click to sample a single pixel from the node’s output.
2. Ctrl/Cmd+Shift+drag to sample a region of pixels from the node’s output.
3. Ctrl/Cmd+Alt+click to sample a single pixel from the node’s input while viewing its output.
4. Ctrl/Cmd+Alt+Shift+drag to sample a region of pixels from the node’s input while viewing its output.
5. Crtl/Cmd+ right-click cancels pixel selections.

Clamps

This node constrains, or clamps, values in the selected channels to a specified range. By default, it clamps all channels to values between 0 and 1. This can be useful for ensuring that the input’s blackest blacks and whitest whites will be visible on an intended display device, or for restricting data fed to a subsequent node that does not support numbers outside this range.

Reformat

Keymix

Keymix for green screen key:IBKcolor（A)+primatte(B)+roto(Mask）