C API

Include include/yolo_runtime.h and link with libyolo_runtime.so.5.

yolo_error_info_v1_t error = {sizeof(error), YOLO_ERROR_INFO_VERSION};
yolo_runtime_t* runtime = NULL;
if (yolo_runtime_create("models/primary/model.yaml", &runtime, &error) != 0)
    return 1;

yolo_runtime_info_v1_t info = {sizeof(info), YOLO_RUNTIME_INFO_VERSION};
yolo_runtime_get_info(runtime, &info);

yolo_image_view_v1_t image = {sizeof(image), YOLO_IMAGE_VIEW_ABI_VERSION};
image.data = rgb;
image.width = width;
image.height = height;
image.row_stride_bytes = width * 3;
image.pixel_format = YOLO_PIXEL_FORMAT_RGB888;

yolo_infer_options_v1_t options = {sizeof(options), YOLO_INFER_OPTIONS_VERSION};
options.seg_geometry_mode = info.task == YOLO_TASK_SEG
    ? YOLO_SEG_GEOMETRY_MIN_AREA_RECT
    : YOLO_SEG_GEOMETRY_NONE;

yolo_result_set_t* results = NULL;
if (yolo_runtime_infer_image(runtime, &image, &options, &results, &error) != 0)
    return 2;

uint32_t count = 0;
yolo_result_set_get_count(results, &count);
/* Read task-specific values with yolo_result_set_get_*(). */
yolo_result_set_release(results);
yolo_runtime_destroy(runtime);

For Seg, select MIN_AREA_RECT, MIN_ENCLOSING_CIRCLE, MEAN_DIAMETER_CIRCLE or ROBUST_FIT_CIRCLE (YOLO_SEG_GEOMETRY_ prefix). Mask views and all other result-set owned data remain valid until yolo_result_set_release().

Direct mask and RGB examples

See examples/cpp/main.cpp for direct calls to all 16 public APIs and docs/RGB_MASK.md for the mask ownership/pixel decode walkthrough. C/C++ Seg examples always compose RGB in memory without a flag or image file.

ROI

See MODEL_CONFIG.md for WHLT, default 800×736 plus LT, and runnable Windows/RK3588 examples. Both ROI helpers are header-only; ABI remains 5.

掩膜膨胀（2026-10-24）

C/C++ 示例支持 --mask-dilation N，N 为 0～100 的整数，默认 0。 Seg 的每个实例独立调用公共库 yolo_mask_dilate，再合成 RGB 编号图；保留重叠。范围限制在模型 ROI（含调用方 ROI 覆盖）或整张原图内。JSON 的掩膜范围和 maskDilationRadius 对应处理后的数据；原始检测框和拟合几何保持原值。公共库推理接口本身仍返回原始掩膜，RGB 合成函数本身不做膨胀。

调用流程：先用 NULL 输出、stride=0、capacity=0 查询返回尺寸与原点；由调用方分配 widthheight 字节，再调用一次得到二值掩膜。保留结果集直到原始输入读取结束；膨胀输出由调用方持有并释放。圆核满足 dxdx+dydy <= NN；N=0 保留原像素。输入输出不可共用缓冲区。失败不改变输出及元数据，成功不改变行尾填充。可直接处理二值数据，无需保存图片。 RGB 最多保存三个重叠编号的限制保持不变；膨胀本身没有这个实例重叠限制。可选膨胀耗时在推理计时之外；SDK/ARM64 交叉编译不能代替 NPU 实机验收。

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C API

Direct mask and RGB examples

ROI

掩膜膨胀（2026-10-24）

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