限定器Qualifier

难度LEVELL3 · 高级L3 · Advanced 领域TOPIC调色

先学：Prerequisites: 二级调色

学习目标LEARNING OBJECTIVES

学完你能用限定器（Qualifier）按颜色把画面中的对象隔离成选区，为二级调色建立干净的遮罩。

概念说明CONCEPTS

限定器（Qualifier）是按 HSL 值隔离画面区域的键控工具——它像一支"颜色吸管"：在画面上划过什么颜色，就选出什么颜色。

  • 按颜色选区：不看形状看颜色，肤色、天空、衣服这类颜色明确的对象最适合用它选。
  • HSL 三条通道：选区由色相（Hue）、饱和度（Saturation）、亮度（Luminance）共同圈定，可分别收紧放宽。
  • 3D 限定器最常用：3D Qualifier 模式下直接在画面上拖拽划线，划过的颜色自动入选。
  • 加减吸管做修补：Picker Add 补选漏掉的区域，Picker Subtract 去掉误选的干扰。
  • 比曲线更擅长隔离：HSL 曲线直接调色，限定器先生成遮罩再调色，相似颜色多的画面更能选干净。

操作步骤STEPS

  1. 在调色页面为片段添加串行节点（Option-S / Alt-S），二级调色在新节点上做
  2. 在中部窗口工具栏点击 Qualifier 图标，打开限定器面板中部窗口的限定器面板
  3. 在面板右上角选择 3D Qualifier（第四个图标）
  4. 在查看器中按住拖拽，划过目标对象的颜色，画面变黑白：白色即选中区域3D 限定器拖选目标颜色
  5. 按 Shift-H 开 Highlight 高亮视图：选中区域保持原色，其余变灰Highlight 视图检查选区
  6. 用 Picker Add / Picker Subtract 修补选区，完成后回色轮面板调色

练习PRACTICE

  1. 找一段人物素材，用 3D Qualifier 选出衣服颜色，开 Highlight 检查选区完整性。
  2. 用 Picker Subtract 去掉一处误选的背景，对比修补前后的遮罩差别。

常见问题FAQ

拖完限定器，画面怎么没变化？

正常。限定器只生成遮罩，本身不改变任何颜色——回到色轮面板调 Hue 或 Sat，选中区域才会变化（见 限定器作为遮罩创建工具）。

选肤色、天空总把背景也带上？

相似颜色干扰了选区。用 Picker Subtract 点掉误选区域；干扰太多时加一个 Power Window 圈住目标，让限定器只在窗口内生效。

选区里有一闪一闪的噪点怎么办？

用面板右侧的 Matte Finesse 工具清理（见 遮罩微调）。如果怎么清都不干净，多半是素材压缩太狠（见 素材质量对选区的影响）。

Learning Objectives学习目标

After this card you can use the Qualifier to isolate an object by color and build a clean matte for secondary color correction.

Concepts概念说明

The Qualifier is a keying tool that isolates areas of the frame by their HSL values — think of it as a "color eyedropper": drag across a color in the viewer, and that color gets selected.

  • Selects by color: it ignores shapes and reads pixel color — ideal for well-defined colors like skin, sky, or clothing.
  • Three HSL channels: the selection is bounded by Hue, Saturation, and Luminance ranges, each adjustable on its own.
  • 3D Qualifier is the go-to: in 3D Qualifier mode you drag a stroke across the image and the colors under it join the selection.
  • Pickers patch the selection: Picker Add catches missed areas; Picker Subtract removes stray picks.
  • Better at isolation than curves: HSL curves grade directly, while the qualifier builds a matte first — it wins when similar colors crowd the frame.

Steps操作步骤

  1. On the Color page, add a serial node (Option-S / Alt-S) — do secondary work on the new node
  2. Click the Qualifier icon in the middle-window toolbar to open the paletteThe Qualifier palette in the middle window
  3. Choose the 3D Qualifier (fourth icon) at the palette's top right
  4. Drag across the target color in the viewer; the image turns black and white — white is selectedDragging with the 3D Qualifier over the target color
  5. Press Shift-H for the Highlight view: selected pixels keep their color, the rest go grayChecking the selection in the Highlight view
  6. Patch the selection with Picker Add / Picker Subtract, then return to the color wheels to grade

Practice练习

  1. Take a clip with a person, select their clothing color with the 3D Qualifier, and check the selection in Highlight view.
  2. Remove one mistakenly selected background area with Picker Subtract and compare the matte before and after.

FAQ常见问题

I dragged with the qualifier — why did nothing change?

That's normal. The qualifier only builds a matte; it changes no color by itself. Go back to the color wheels and move Hue or Sat to see the effect (see Qualifier as Mask Creator).

Selecting skin or sky always grabs the background too?

Similar colors are leaking in. Click them away with Picker Subtract; if look-alikes fill the frame, add a Power Window so the qualifier only works inside it.

My selection has flickering specks — how do I clean them?

Use the Matte Finesse tools on the right of the palette (see Matte Finesse). If it never comes clean, the footage is probably too compressed (see Source Quality Impact on Selection).

深度资料：限定器 →Deep dive: 限定器 →

本卡术语Terms in this card

调色页Color page 调色轮Color Wheels 曲线Curves 饱和度Saturation HSL 曲线HSL Curves 窗口Power Window 限定器Qualifier 二级调色Secondary Correction 调色Grade 节点Node