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How to Use Qualifier for Professional Color Correction in DaVinci Resolve

Aug 31, 2020• Proven solutions

The secondary colour correctors of Da Vinci Resolve (DVR) would allow the targeting of specific colors within a given picture. The HSL and RGB colour combined with the LUM qualification would allow you to select a specific colour or part of the picture. With the help of the 3D Keyer of the DVR you will be able to drag on a part of the image for pulling a clean key and separating the specific areas in your capture.

An Easier Way to correct video colour with Wondershare Filmora

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If you are looking for an easy and straightforward method of doing your colour corrections then try using the Wondershare Filmora software. It would allow you to do detailed post video colour grading and correction in 3 easy steps-

1. Install the Wonshare Filmora software and import your videos

2. Place the video to the timeline and double click on it. In the tool box which subsequently pops up you will be able to adjust the brightness, contrast, saturation and tint quickly.

3. If you want to go for advanced colour grading then click the Advanced button in the bottom to open the colour grading window which comes with all the options like white balance, colour histogram, 3D LUT, HSL, Colour and Light and vignette.

4. Now you can save and share your work.

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Getting to know Qualifier Tool in DaVinci Resolve

Part 1: Qualifier Palette Layout

qualifier palette

The Qualifier Palette interface of DVR is pretty simple to use. On the left the graphic controls would allow the user to adjust the colour component manually. The selection range tool on the right allows you to define any key by checking the pixels of the picture either with the help of the 4th trackball of DVR’s control panel or by using the pointer. The HSL Qualifier makes use of luma, hue and saturation for defining a key. Nonetheless the LUM or RGB can also be used for pulling keys with the aid of other colour component combinations. The 3D qualifier can also be used for pulling the well-refined keys and creating lines to test the colours you need to separate.

Regardless of the qualifier being used, the Matte Finesse controls helps to make the resulting key more refined and practical.

Part 2: Which Qualifier should I Use?

3D- This key can be helpful in isolating colours like blue, cyan, skin tone and orange. All you need to do is make lines on the section of the picture which you need to separate. This quick and accurate key can be used in loads of environments. One downside of this key is that it samples all the colour component of the picture and is therefore not handy when you need to separate specific colour components.

HSL- is not as accurate as the 3D keyer and often comes with a greater portion of the given picture. When the 3D keyer doesn’t allow you to achieve the desired result for a given image you can use the HSL instead. The intuitive interface of HSL allows you to easily fine tune the softness and range of every single samples colour component. It also allows you to disable those colour components which you don’t want to include in the final key. Therefore you have the option of pulling only the saturation key or the hue key for resolving the problem at hand.

RGB- This key is not much different from the HSL but allows you to fine tune the ensuing key works by adjustment of the blue, green and red colour components.

LUM- This keyer precisely isolates portions of the picture depending on darkness, light and tonality of the image. It comes real handy when you are isolating shadows or highlights of a picture.

How to use HSL Qualifier and 3D Qualifier for Professional Correction

Using the HSL qualifier for colour correction

Part 1: Using the HSL qualifier mode for isolating a subject:

1. First you have to open the qualifier palette and select HSL before clicking the eyedropper

2. Now you need to click on a pixel or on the portion of the picture you need to separate. You can also choose to click and drag through a range of pixels inside the subject.

3. For viewing the key being created the highlight button in the viewer option toolbar needs to be clicked. The part of the picture being isolated would appear in colour by default and the rest of the image would look grey.

4. For subtracting the inner range you need to hit the minus colour range control before clicking and dragging through the part of the keyed picture you want to eliminate.

5. For adding softness to the outer range of the key being created just click the + softness control before clicking and dragging through the part of the picture which would be included as a soft range.

6. The 3 commonest ways of refining keys with Matte Finesse controls are raising the Clean Black for filling in holes in the portions being omitted, raising the Clean White for closing holes in the portion of the picture being isolated and finally using the Blur Radius and In and Out ration controls for blurring the key edge.

matte finesse

7. Finally hit the Highlight control for turning the highlight off and do all the necessary adjustments.

Part 2: Using 3D qualifier for colour correction

1. After opening the qualifier palette select 3D and hit the eyedropper

2. Draw a line on the part of the image you want to separate. Lines adding to the key are blue.

3. To view the key being created click the Highlight button from the viewers options toolbar

4. If required you can make more lines for adding more portion of the picture to the key being created

5. In case there are portions which need to be excluded you need to press and hold the option key down and make a line on the areas which you want to omit. On turning off the Highlight button the option-drawn lines would appear red and the subtract portions of the key being created would be visible.

6. If you feel that the key is nice enough for fine tuning then don’t draw anymore lines.

7. When you are done you need to switch off the Highlight control and make the required adjustments.

Liza Brown
Liza Brown is a writer and a lover of all things video.