warp_perspective 输出图像全黑

[fengyanWang]

您好，我这边基于get_perspective_transform和warp_perspective，对图像做仿射变换，但是输出的图像一直是全黑的，相关代码如下，期待您的回复！

  fcv::Point2f src_points[4];
  fcv::Point2f dst_points[4];
  int target_height = 0, target_width = 0;
  .......
  
  fcv::Mat transform = fcv::get_perspective_transform(src_points, dst_points);

  fcv::Mat fcv_src(img_w, img_h, fcv::FCVImageType::PKG_RGBA_F32, imgData.data);
  fcv::Mat fcv_dst;
  fcv::warp_perspective(fcv_src, fcv_dst, transform);

  cv::Mat opencvMat(img_h, img_w, CV_8UC(fcv_dst.channels()),fcv_dst.data());
  std::string res_path = "/data/local/tmp/flycv_res.jpg";
  cv::imwrite(res_path, opencvMat);