Fill in contours to avoid holes in blobs

Prevents us from detecting multiple blobs in one.
Also don't require more green than blue because of glare.
Combining these two removes holes in all the images from bellarmine.

Signed-off-by: Milind Upadhyay <milind.upadhyay@gmail.com>
Change-Id: I761957e81f0ac5ba9fbc6a82ee57e32d40cbed5f
diff --git a/y2022/vision/viewer.cc b/y2022/vision/viewer.cc
index 24c8fc6..f847dbd 100644
--- a/y2022/vision/viewer.cc
+++ b/y2022/vision/viewer.cc
@@ -212,7 +212,7 @@
 
   TargetEstimator estimator(intrinsics, extrinsics);
 
-  for (auto it = file_list.begin() + FLAGS_skip; it != file_list.end(); it++) {
+  for (auto it = file_list.begin() + FLAGS_skip; it < file_list.end(); it++) {
     LOG(INFO) << "Reading file " << *it;
     cv::Mat image_mat = cv::imread(it->c_str());
     BlobDetector::BlobResult blob_result;