Photoshop-style curve grading. Each curve is a control-point list (x,y pairs, comma-separated) interpolated into a 256-entry LUT. The master curve shapes tone, the R/G/B curves shape color cast.

Module：Color grading · Task type：color_grade_curves

Ports

Inputs

PortTypeRequired
inImage / cv::Mat✓

Outputs

PortTypeRequired
outcv::Mat✓

Parameters

参数类型默认值范围 / 选项说明
curve_ystring"0,0;1,1"
curve_rstring"0,0;1,1"
curve_gstring"0,0;1,1"
curve_bstring"0,0;1,1"
interpenum0LINEAR / CUBIC

Example graph

A minimal runnable pipeline (read → process → write). Drag it into GraphStudio or open via --open; replace data/test.png with a real path.

{
  "version": "2.0",
  "tasks": [
    {
      "id": "read",
      "type": "opencv_image_read",
      "params": {
        "file_path": "data/test.png"
      }
    },
    {
      "id": "node",
      "type": "color_grade_curves",
      "params": {
        "curve_y": "0,0;1,1",
        "curve_r": "0,0;1,1",
        "curve_g": "0,0;1,1",
        "curve_b": "0,0;1,1",
        "interp": 0
      }
    },
    {
      "id": "save",
      "type": "opencv_image_write",
      "params": {
        "file_path": "out_out.png"
      }
    }
  ],
  "edges": [
    {
      "from": "read",
      "from_port": "out",
      "to": "node",
      "to_port": "in"
    },
    {
      "from": "node",
      "from_port": "out",
      "to": "save",
      "to_port": "in"
    }
  ]
}

Part of the GraphStudio node guide series; parameters reflect the latest release.