diff --git a/y2022/vision/blob_detector.cc b/y2022/vision/blob_detector.cc
index 4aa453c..efe7961 100644
--- a/y2022/vision/blob_detector.cc
+++ b/y2022/vision/blob_detector.cc
@@ -11,9 +11,8 @@
 #include "opencv2/imgproc.hpp"
 #include "y2022/vision/geometry.h"
 
-DEFINE_int32(red_delta, 100,
-             "Required difference between green pixels vs. red");
-DEFINE_int32(blue_delta, -10,
+DEFINE_int32(red_delta, 50, "Required difference between green pixels vs. red");
+DEFINE_int32(blue_delta, -20,
              "Required difference between green pixels vs. blue");
 
 namespace y2022 {
@@ -102,9 +101,9 @@
   while (blob_it < blob_result->unfiltered_blobs.end() &&
          stats_it < blob_result->blob_stats.end()) {
     constexpr double kTapeAspectRatio = 5.0 / 2.0;
-    constexpr double kAspectRatioThreshold = 1.6;
+    constexpr double kAspectRatioThreshold = 2.0;
     constexpr double kMinArea = 10;
-    constexpr size_t kMinNumPoints = 6;
+    constexpr size_t kMinNumPoints = 2;
 
     // Remove all blobs that are at the bottom of the image, have a different
     // aspect ratio than the tape, or have too little area or points.
diff --git a/y2022/vision/viewer.cc b/y2022/vision/viewer.cc
index f99cf97..82a5e45 100644
--- a/y2022/vision/viewer.cc
+++ b/y2022/vision/viewer.cc
@@ -216,7 +216,7 @@
   TargetEstimator estimator(intrinsics, extrinsics);
 
   for (auto it = file_list.begin() + FLAGS_skip; it < file_list.end(); it++) {
-    LOG(INFO) << "Reading file " << *it;
+    LOG(INFO) << "Reading file " << (it - file_list.begin()) << ": " << *it;
     cv::Mat image_mat = cv::imread(it->c_str());
     BlobDetector::BlobResult blob_result;
     blob_result.binarized_image =