自定义曲线调色Custom Curves

难度LEVELL2 · 进阶L2 · Intermediate 领域TOPIC调色

先学：Prerequisites: 一级调色

学习目标LEARNING OBJECTIVES

学完你能读懂自定义曲线（Custom Curves）的横纵轴含义，会用黑白端点和 S 曲线精确控制一段素材的对比度。

概念说明CONCEPTS

自定义曲线（Custom Curves）是一张"输入 → 输出"映射图，靠打点精确改变特定色调区域的明暗——横轴是原始画面的亮度（左黑右白），纵轴是调整后的结果（下暗上亮）。它在调色页面中央面板的 Curves 面板里。

  • 对角线 = 不调整：默认从左下黑点到右上白点的斜线代表"输入等于输出"；哪里被推高哪里变亮，压低则变暗。
  • 黑白端点管场子：左下端点右移压黑场，右上端点左移抬白场——效果等价于 Lift 和 Gain 的 Master Wheel。
  • 打点锁区间：一个点的影响止于相邻两点；在不想动的区域加"锚点"，调整就不会外溢。
  • 点右键即删：曲线上单击加点，右键点删掉；背景的 YRGB 直方图告诉你像素集中在哪一段。
  • S 曲线 = 对比度：暗部点下压、亮部点上抬，就是经典的 S 曲线——比 Contrast 滑杆灵活得多。

操作步骤STEPS

  1. 在调色页面选中片段，点中央面板工具条的曲线图标打开 Curves 面板，确认处于 Custom 模式打开 Curves 面板
  2. 把左下的黑点控制点向右拖，暗部压黑——盯 Parade 波形底部接近 0拖动黑点压暗部
  3. 把右上的白点控制点向左拖，高光提亮——波形顶部接近 1023 但不超越
  4. 在曲线暗部约四分之一处单击加一个点，向下轻拖拽，压暗暗部
  5. 在亮部约三分之一处再加一个点，向上轻抬——S 形成形，对比度立刻出来S 曲线成形
  6. 按 Shift-D 对比前后；不满意的点右键删除重来

练习PRACTICE

  1. 找一段发灰的素材，只用黑白两个端点把黑场、白场拉开，按 Shift-D 对比前后。
  2. 同一段素材分别用 Contrast 滑杆和 S 曲线加对比度，来回切换，体会控制精度的差别。

常见问题FAQ

曲线和色轮都能调，先用哪个？

黑白场、整体氛围先用色轮（见 一级调色轮）；要精确锁定某个色调区间、雕对比度形状时换曲线。色轮管"三个大区"，曲线能在区里再细分。

点加多了，曲线扭成波浪怎么办？

右键逐个点删掉，或点面板右上角的 Reset 归零重来。波浪形曲线往往意味着色带，宁少勿多。

只想让中间调变亮，不动黑白点行吗？

行。先在暗部和亮部各打一个锚点锁住两端，再在曲线中部加点上抬——黑白点纹丝不动。

Learning Objectives学习目标

After this card you can read what the Custom Curves axes mean, and use the black/white end points plus an S-curve to control a shot's contrast with precision.

Concepts概念说明

Custom Curves is an input-to-output mapping graph: you place points to change the brightness of specific tonal ranges — the X axis is the original image tonality (black on the left, white on the right), the Y axis is the result (darker below, brighter above). It lives in the Curves palette of the Color page's center panel.

  • The diagonal means "no change": the default line from the lower-left black point to the upper-right white point is "input equals output"; push a region up and it brightens, pull it down and it darkens.
  • End points own the poles: drag the lower-left point right to crush blacks, the upper-right point left to brighten whites — the same job as the Lift and Gain Master Wheels.
  • Points fence off ranges: a point's influence stops at its neighbors; drop "anchor" points over regions you want untouched so adjustments don't spill over.
  • Right-click deletes: click the curve to add a point, right-click a point to remove it; the YRGB histogram behind the curve shows where the pixels actually pile up.
  • S-curve = contrast: pull the shadows point down, push the highlights point up, and you have the classic S-curve — far more flexible than the Contrast slider.

Steps操作步骤

  1. On the Color page, select the clip, click the curves icon on the center panel toolbar to open the Curves palette, and make sure you're in Custom modeOpening the Curves palette
  2. Drag the black-point control in the lower left to the right to deepen the shadows — watch the Parade trace bottom approach 0Dragging the black point down
  3. Drag the white-point control in the upper right to the left to lift the highlights — the trace tops approach 1023 without crossing
  4. Click the curve about a quarter of the way up to add a shadows point, then nudge it downward
  5. Add another point about a third of the way down from the top and lift it gently — the S takes shape and contrast snaps inThe S-curve taking shape
  6. Press Shift-D to compare before and after; right-click any point you're unhappy with to delete it

Practice练习

  1. Take a flat, washed-out clip and stretch the black and white points using only the two end points, then compare with Shift-D.
  2. On the same clip, add contrast first with the Contrast slider, then with an S-curve — toggle between them and feel the difference in control.

FAQ常见问题

Wheels or curves — which do I reach for first?

Use the wheels for black/white points and overall mood (see Primary Color Wheels); switch to curves when you need to isolate a narrow tonal range or sculpt the exact shape of contrast. Wheels own three broad zones; curves subdivide inside a zone.

I added too many points and the curve is a rollercoaster — now what?

Right-click the points to delete them one by one, or hit Reset in the palette's upper-right corner and start over. A wavy curve usually means banding — fewer points win.

Can I brighten just the midtones without touching the black and white points?

Yes. Drop one anchor point in the shadows and one in the highlights to pin both ends, then add a point in the middle and raise it — the poles stay put.

深度资料：自定义曲线调色 →Deep dive: 自定义曲线调色 →

本卡术语Terms in this card

转场Transition 调色页Color page 对比度Contrast 曲线Curves Gain（亮部）Gain Gamma（中间调）Gamma Lift（暗部）Lift 调色Grade