Image resize (cv::resize). Use INTER_AREA when shrinking (anti-moiré), INTER_LINEAR/INTER_CUBIC when enlarging; INTER_NEAREST preserves exact values (mandatory for masks/label maps).
Module：OpenCV geometry · Task type：opencv_resize
Ports
Inputs
| Port | Type | Required |
|---|---|---|
in | Image / cv::Mat | ✓ |
Outputs
| Port | Type | Required |
|---|---|---|
out | cv::Mat | ✓ |
Parameters
| 参数 | 类型 | 默认值 | 范围 / 选项 | 说明 |
|---|---|---|---|---|
width | int | 0 | [0, 8192] | target width in pixels; 0 follows the input |
height | int | 0 | [0, 8192] | target height in pixels; 0 follows the input |
scale_x | float | 1 | [0.01, 32] | |
scale_y | float | 1 | [0.01, 32] | |
interpolation | enum | 1 | LINEAR / NEAREST / CUBIC / LANCZOS4 / AREA | interpolation method |
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": "opencv_resize",
"params": {
"width": 0,
"height": 0,
"scale_x": 1,
"scale_y": 1,
"interpolation": 1
}
},
{
"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.