Add new model PaddleSeg (#30)

* Support new model PaddleSeg

* Fix conflict

* PaddleSeg add visulization function

* fix bug

* Fix BindPPSeg wrong name

* Fix variable name

* Update by comments

* Add ppseg-unet example python version

Co-authored-by: Jason <jiangjiajun@baidu.com>

fastdeploy/vision/visualize/segmentation.cc

@@ -0,0 +1,46 @@
+// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifdef ENABLE_VISION_VISUALIZE
+
+#include "fastdeploy/vision/visualize/visualize.h"
+#include "opencv2/highgui.hpp"
+#include "opencv2/imgproc/imgproc.hpp"
+
+namespace fastdeploy {
+namespace vision {
+
+void Visualize::VisSegmentation(const cv::Mat& im,
+                                const SegmentationResult& result,
+                                cv::Mat* vis_img, const int& num_classes) {
+  auto color_map = GetColorMap(num_classes);
+  int64_t height = result.masks.size();
+  int64_t width = result.masks[1].size();
+  *vis_img = cv::Mat::zeros(height, width, CV_8UC3);
+
+  int64_t index = 0;
+  for (int i = 0; i < height; i++) {
+    for (int j = 0; j < width; j++) {
+      int category_id = static_cast<int>(result.masks[i][j]);
+      vis_img->at<cv::Vec3b>(i, j)[0] = color_map[3 * category_id + 0];
+      vis_img->at<cv::Vec3b>(i, j)[1] = color_map[3 * category_id + 1];
+      vis_img->at<cv::Vec3b>(i, j)[2] = color_map[3 * category_id + 2];
+    }
+  }
+  cv::addWeighted(im, .5, *vis_img, .5, 0, *vis_img);
+}
+
+}  // namespace vision
+}  // namespace fastdeploy
+#endif