Directional morphological dilation (max over the kernel). max/min are naturally separable and iterable on the GPU: iterations repeats the pass. Combine with render_erode_dir for open/close/gradient (bit-identical to OpenCV over the whole image — clamp-to-edge equals the ±inf border under max/min).
Module：GPU render · Task type：render_dilate_dir
Ports
Inputs
| Port | Type | Required |
|---|---|---|
in | Image / cv::Mat | ✓ |
Outputs
| Port | Type | Required |
|---|---|---|
out | task_graph::Image | ✓ |
Parameters
| 参数 | 类型 | 默认值 | 范围 / 选项 | 说明 |
|---|---|---|---|---|
script_path | string | （空） | custom render script path (from an effect manifest; empty = built-in effects) | |
width | int | 0 | [0, 65535] | target width in pixels; 0 follows the input |
height | int | 0 | [0, 65535] | target height in pixels; 0 follows the input |
format | enum | 0 | rgba8 / rgba32f | render target texture format |
clear | bool | true | clear the target at pass start | |
clear_color | string | "0,0,0,0" | clear color as comma-separated RGBA components | |
blend | bool | false | enable blended output | |
ksize | int | 3 | [1, 31] (step 2) | kernel edge length in pixels; must be a positive odd number |
direction | enum | 0 | horizontal / vertical |
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": "render_dilate_dir",
"params": {
"width": 0,
"height": 0,
"format": 0,
"clear": true,
"clear_color": "0,0,0,0",
"blend": false,
"ksize": 3,
"direction": 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.