Edge despill nuke

Give Feedback Support Portal. The following section describes the parameters you need to do basic keying. This gives you enough to tackle most simple keys. A discussion of advanced parameters to fine tune keys and tackle complex keys can be found under Advanced Keying. The screen color is probably the most important parameter and you should always pick the screen color before doing anything else.

It should be set to the color of the green or blue curtain behind the foreground object. The average value of the pixels selected is used. This means that you tic tac toe algorithm in artificial intelligence pick the blue screen color even if you are viewing the matte, status, or composite.

Picking the Screen Color creates the screen matte used to composite the foreground over the background. It also sets the Screen Balance if this has not already been set manually and despills the foreground. Setting the screen color pulls a key, or in other words, creates a matte - the Screen Matte.

Setting the screen color also despills the foreground, although you can also use the Despill Bias to remove more spill. In some cases this is enough to get a decent key. For more information on Screen Colorsee Screen Color. You should note that repeatedly picking colors does not add to previous selections and key more of the image with each click.

To key more of the image, try picking different shades of blue then use the screen strength parameter. See Keying More. After picking the screen color, you have created a matte the screen matte and despilled the foreground. The result can be displayed in a number of different ways using the View control.

You can output the final composite of the foreground over the background as an rgba, or you can output the premultiplied or unpremultiplied foreground for compositing elsewhere in the tree. The screen matte and the status view are the other two options which are useful in fine-tuning the key rather than as an output image in their own right. The Status is one of the options in the View dropdown menu and shows an exaggerated view of the key so that you can make a more informed decision when tuning the key.

The image on the right shows the Status display after the screen color has been picked from the image on the left. You need gray pixels around the edge of the foreground to get a good key at the foreground edge.Edge allows you to extend the proper color out over transparent edges or areas with a lot of motionblur without eroding away the nice detail.

This edge extend has some more advanced features like splitting the core matte and final key which allows you to work on motion blur without effecting small details like hair or a swinging rope for example. There is also more control over how you blend the core detail to the extended edge color.

This was shown to me years ago by an old comp sup I had and is the same as the edge extend by Frank Reuter. This is my version of it that has evolved a little bit over the years. Let me know of any issues you find with edge here or on my site. Main Repository Page Gizmos Filter. This location is for Registered Users Only. Perhaps you need to login or register. Contributor: Rob Bannister.

Website: www. Requirements: Version History 6. This has caused errors in some operating systems. Rename your in your menu. Added tool tips to all the knobs and fixed the blending tab by adding the mix and blur bg sliders. Added luma masking, Luma blend 5. This was due to the copy nodes inside throwing an error because there is not alpha on creation of the node. Added edge preview for regain.

Added mix knob to color panel. Thanks for all the hard works.

edge despill nuke

I've been told over the years that it's saved a few artists butts Mine included. I ha e updated those pages. I totally kissed the downloads page and I will update it in the coming weeks.Give Feedback Support Portal. Keylight is an industry-proven color difference keyer. Use the Screen Matte parameters to improve the matte. All rights reserved. The Outside Mask, or garbage matte, used to remove unwanted objects lighting rigs, and so on from the foreground.

The Inside Mask, or holdout matte, used to confirm areas that are definitely foreground. It does not include any inside or outside masks. This is used to firm up the foreground matte to stop print through.

Despilling and Color Replacement

The outside mask is used as a garbage mask to reveal the background. Use this option on shots that can only be keyed using several different keys on different parts of the image multipass keying. This renders the original source image with the Screen Matte generated in this Keylight node. When disabled, the key result is not unpremultiplied. Adjusts how much of the screen color is removed to make the screen matte.

edge despill nuke

Increasing this value keys more. Sets the balance point for the image to key. Generally speaking, blue screens tend to work best with a balance of around 0. If the key is not working too well with these settings, try setting the balance to about 0.

Pick the color from the part of the foreground that is affected. Adjusts the Despill Bias to remove any remaining spill from around the foreground image. The most useful colors to pick for Despill Bias are often hair colors and skin tones. When enabled, use the Alpha Bias color as the Despill Bias color. When disabled, set the Despill Bias color separately. Adjusts how much you want to soften the foreground image used to generate the key. Sets the cut off point below which alpha values in the Screen Matte are set to zero.

Sets the cut off point above which alpha values in the Screen Matte are set to the white point. Allows edge detail to be restored after clipping the Screen Matte too aggressively using the Clip Black and Clip White controls. Adjusts alpha values in the Screen Matte.

edge despill nuke

Either grow if greater than zero or shrink if less than zero the alpha in the Screen Matte at a sub-pixel level. Controls the amount of blur applied to the matte. For example, softness could be used on a very harsh matte pulled for use as an inside matte further down the tree.

Removes isolated spots of black in a white matte by simplifying the matte. Black specks in the white matte are absorbed by the surrounding white areas. Removes isolated spots of white in a black matte by simplifying the matte. White specks in the black matte are absorbed by the surrounding black areas. Sets the color method to use for pixels where the alpha of the Screen Matte has been modified:. This produces a more subtle result than the Hard Color option.All the same Lynda.

Plus, personalized course recommendations tailored just for you. All the same access to your Lynda learning history and certifications. Same instructors. New platform.

And then we do our despill operation. Are you sure you want to mark all the videos in this course as unwatched? This will not affect your course history, your reports, or your certificates of completion for this course. Type in the entry box, then click Enter to save your note. Start My Free Month.

edge despill nuke

You started this assessment previously and didn't complete it. You can pick up where you left off, or start over. Develop in-demand skills with access to thousands of expert-led courses on business, tech and creative topics.

Video: Steve Wright's adaptive despill. You are now leaving Lynda. To access Lynda. Visit our help center. Preview This Course. Course Overview Transcript View Offline Exercise Files - [Instructor] So far, we've seen that no matter…how you adjust the despill,…there'll be some region of the comp…where it just doesn't look right. Resume Transcript Auto-Scroll. Author Steve Wright.

Every VFX artist must master this complex subject to succeed in the industry. This course offers 12 hours of the most comprehensive and detailed training ever produced on the subject of keying, covering literally every aspect of the job. You can follow along with NUKE, the software featured in the videos, or with any other compositing software that offers floating-point math.

NUKE master trainer Steve Wright introduces several overall compositing workflows, as well as a myriad of tips and tricks and several keying techniques never before published. Learn about green-screen, blue-screen, luma, and saturation keys; spill suppression; color correction; edge refinement; and more.

We are proud to host this course in our library. Topics include: Creating an uber key Keying green-screen vs. Skill Level Intermediate. Show More Show Less. Related Courses.Advanced Search. This can be set in the 'setLinuxFileManager. PS: It's very easy, no scripting knowl edge is needed. Supports: Existing paths of the type Edge Size Control: Size: Control the width of the edge. Blur: Blurs the edge selection. This gizmo is based on a basic average despill expression, but it adds more flexibility and customization.

Also, it can use a non-destructive method for the core of the matte, in case you only need to adjust the edge s.

Introduction to color correction in Nuke

This is what the controls do: The threshold indicates how much green is going to be cleaned up. The edge strength adjusts It has single installer for all included plugins. Archives contain three installers separately for Nuke 8, Nuke 9 and Additive Keyer. To get it to work requires a lot of prep work on the screen and reference to work with uneven screens. It is used in combination with normal keyer that provides the main core of the comp and the additive keyer generates only the subtle soft edge s.

Read more A gamma correction is used to remove edge artifacts and then the captured grain can be applied either to teh whole comp or to a matted area. Tested on Linux in Nuke 9 but should work on other A simple gizmo to bleed the hue and saturation of the background into the foreground around the edge s. Hey Everyone, here's a small Tool for you. Slit Scan. A tool for revealing a key through the feather of a roto shape.

Good for fine details on the edge s of roto. Pull a key for the edge s of your shape, then use the feather of the roto shape to reveal through to the key.All the same Lynda. Plus, personalized course recommendations tailored just for you. All the same access to your Lynda learning history and certifications.

Same instructors. New platform. So I'll subtract the despilled image…from the original green screen…with this Merge node set for minus. Then we add this to our original Keylight like so.

Are you sure you want to mark all the videos in this course as unwatched? This will not affect your course history, your reports, or your certificates of completion for this course. Type in the entry box, then click Enter to save your note.

Start My Free Month. You started this assessment previously and didn't complete it. You can pick up where you left off, or start over. Develop in-demand skills with access to thousands of expert-led courses on business, tech and creative topics. Video: How to fix despill artifacts. You are now leaving Lynda. To access Lynda. Visit our help center.

Preview This Course. Course Overview Transcript View Offline Exercise Files - [Instructor] If the despill coming out of a keyer…is a problem,…there's no way to mask off the spill supression…inside the keyer…so the only solution is to fix the artifacts downstream. Resume Transcript Auto-Scroll. Author Steve Wright. Every VFX artist must master this complex subject to succeed in the industry. This course offers 12 hours of the most comprehensive and detailed training ever produced on the subject of keying, covering literally every aspect of the job.

You can follow along with NUKE, the software featured in the videos, or with any other compositing software that offers floating-point math. NUKE master trainer Steve Wright introduces several overall compositing workflows, as well as a myriad of tips and tricks and several keying techniques never before published. Learn about green-screen, blue-screen, luma, and saturation keys; spill suppression; color correction; edge refinement; and more.

We are proud to host this course in our library. Topics include: Creating an uber key Keying green-screen vs. Skill Level Intermediate. Show More Show Less.

Related Courses. Preview course. Nuke Essential Training with Steve Wright. Search This Course Clear Search. Welcome 3m 57s.

Inputs and Controls

Exercise files 1m 19s. Keying Workflows. A look at different keying workflows 6m 43s. Creating an uber key 2m 58s.Give Feedback Support Portal. Although ChromaKeyer automatically despills the matte when you select a screen color, you may find that you can improve the matte by manually despilling the key using a despill bias or by replacing color at the edges of the matte. The despill bias allows you to specify a color from the image, separate from the alpha biasto improve the overall despill for the matte.

Typically, you should pick skin tones or hair colors for the despill bias.

Keying and compositing in NukeX

Selecting the hair color despills the blue pixels, producing a better matte. Improving a matte by adjusting the alpha channel can remove the wrong amount of screen color from the pixels where transparency has changed. The replace controls instruct ChromaKeyer how to deal with these pixels.

The replace mode controls which pixels inherit the replace color. This is the default operation. Pixels closer to the background have more background bias and pixels closer to the foreground have more foreground bias. This gives a more subtle result than the edge hard color option.

Highlighted pixels replaced by the color picked from the Viewer. Yes No. If you can't find what you're looking for or you have a workflow question, please try Foundry Support. If you have any thoughts on how we can improve our learning content, please email the Documentation team using the button below. All Files. Nuke Search Tips Search is based on keyword.

课时21:Edge Despill( 边缘去溢色) 和 Core Despill (中心去溢色)

Despilling and Color Replacement Although ChromaKeyer automatically despills the matte when you select a screen color, you may find that you can improve the matte by manually despilling the key using a despill bias or by replacing color at the edges of the matte. Custom Despilling The despill bias allows you to specify a color from the image, separate from the alpha biasto improve the overall despill for the matte.

Enable custom despill bias to allow you to use the despill bias controls. Click the color swatch next to despill bias to activate the eye dropper.

This averages the pixels in the area selected to produce a better result. Blue screen pixels present in a default matte. Color Replacement Improving a matte by adjusting the alpha channel can remove the wrong amount of screen color from the pixels where transparency has changed. Click the color swatch next to replace color to activate the eye dropper. This averages the pixels in the selected area to produce a better result.


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