![]() ![]() This method is most suitable when you are trying to build an analytical function from a node interpolation (for example: exponential, logarithm, power, etc.). monotonic spline is designed specifically to give a monotonic interpolation, meaning that there will be none of the oscillations the cubic spline may produce.It is very robust, no matter the number of nodes and their spacing, but will produce a more faded and dull contrast. centripetal spline is designed specifically to avoid cusps and oscillations but, as a drawback, it will follow the nodes more loosely.This method works best when there are only 4 to 5 nodes, evenly spaced. However, this method is very sensitive to the nodes' position, and can produce cusps and oscillations when the nodes are too close to each other, or when there are too many of them. Since it gives smooth curves, the contrast in the image is better enhanced. cubic spline is, arguably, the most visually pleasing. ![]() As this process is never perfect, several methods are offered that can alleviate some of the issues you may encounter. Interpolation is the process by which a continuous curve is derived from a few nodes. interpolation method tone curve and rgb curve only Please see the individual module documentation for discussion of any additional controls. The following controls are common to two or more of the above processing modules and are therefore discussed separately here. To remove a node, click on it and drag it out of the widget area. ![]() Ctrl+click to generate a new node at the x-location of the mouse pointer and the corresponding y-location of the current curve – this adds a node without the risk of accidentally modifying the curve. You can move the nodes to modify the curve or generate new nodes by clicking on the curve. In their default state, curves are straight lines, defined by two anchor nodes at the top-right and bottom-left of the graph. ![]() These modules have some common features that warrant separate discussion. The base curve, tone curve and rgb curve modules use curves to control the tones in the image. ![]()
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