Merge "Change default defense to 0"
diff --git a/frc971/control_loops/drivetrain/drivetrain_plotter.ts b/frc971/control_loops/drivetrain/drivetrain_plotter.ts
index deb300f..4b59dc0 100644
--- a/frc971/control_loops/drivetrain/drivetrain_plotter.ts
+++ b/frc971/control_loops/drivetrain/drivetrain_plotter.ts
@@ -20,6 +20,8 @@
       '/drivetrain', 'frc971.control_loops.drivetrain.Status');
   const output = aosPlotter.addMessageSource(
       '/drivetrain', 'frc971.control_loops.drivetrain.Output');
+  const gyroReading = aosPlotter.addMessageSource(
+      '/drivetrain', 'frc971.sensors.GyroReading');
   const imu = aosPlotter.addRawMessageSource(
       '/drivetrain', 'frc971.IMUValuesBatch',
       new ImuMessageHandler(conn.getSchema('frc971.IMUValuesBatch')));
@@ -323,6 +325,7 @@
   gyroY.setColor(GREEN);
   const gyroZ = gyroPlot.addMessageLine(imu, ['gyro_z']);
   gyroZ.setColor(BLUE);
+  gyroPlot.addMessageLine(gyroReading, ['velocity']).setColor(BLUE);
 
   // IMU States
   const imuStatePlot =
diff --git a/scouting/www/app.ts b/scouting/www/app.ts
index e22fad0..79c1094 100644
--- a/scouting/www/app.ts
+++ b/scouting/www/app.ts
@@ -10,6 +10,15 @@
 export class App {
   tab: Tab = 'Entry';
 
+  constructor() {
+    window.addEventListener('beforeunload', (e) => {
+      // Based on https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload#example
+      // This combination ensures a dialog will be shown on most browsers.
+      e.preventDefault();
+      e.returnValue = '';
+    });
+  }
+
   tabIs(tab: Tab) {
     return this.tab == tab;
   }
diff --git a/scouting/www/entry/entry.component.ts b/scouting/www/entry/entry.component.ts
index abdbeb6..4c94670 100644
--- a/scouting/www/entry/entry.component.ts
+++ b/scouting/www/entry/entry.component.ts
@@ -10,7 +10,7 @@
 import ErrorResponse = error_response.scouting.webserver.requests.ErrorResponse;
 
 type Section = 'Team Selection'|'Auto'|'TeleOp'|'Climb'|'Defense'|'Review and Submit'|'Home'
-type Level = 'Low'|'Medium'|'High'|'Transversal'
+type Level = 'Failed'|'Low'|'Medium'|'High'|'Transversal'
 
 @Component({
     selector: 'app-entry',
@@ -38,6 +38,10 @@
         this.proper = !this.proper;
     }
 
+    setFailed() {
+        this.level = 'Failed';
+    }
+
     setLow() {
         this.level = 'Low';
     }
@@ -54,14 +58,6 @@
         this.level = 'Transversal';
     }
 
-    defensePlayedOnSlider(event) {
-        this.defensePlayedOnScore = event.target.value;
-    }
-
-    defensePlayedSlider(event) {
-        this.defensePlayedScore = event.target.value;
-    }
-
     setClimbedTrue() {
         this.climbed = true;
     }
diff --git a/scouting/www/entry/entry.ng.html b/scouting/www/entry/entry.ng.html
index e1273c6..aa89105 100644
--- a/scouting/www/entry/entry.ng.html
+++ b/scouting/www/entry/entry.ng.html
@@ -71,18 +71,28 @@
     <div *ngSwitchCase="'Climb'" id="climb" class="container-fluid">
         <div class="row">
             <form>
-                <input (click)="setClimbedFalse()" type="radio" name="climbing" id="continue"><label for="continue">Kept Shooting</label><br>
-                <input (click)="setClimbedTrue()" type="radio" name="climbing" id="climbed"><label for="climbed">Attempted to Climb</label><br>
+                <input [ngModel]="climbed" (click)="setClimbedFalse()" type="radio" name="climbing" id="continue" value="true">
+                <label for="continue">Kept Shooting</label><br>
+                <input [ngModel]="climbed" (click)="setClimbedTrue()" type="radio" name="climbing" id="climbed" value="false">
+                <label for="climbed">Attempted to Climb</label><br>
             </form>
         </div>
         <div *ngIf="climbed">
             <h4>Bar Made</h4>
             <form>
-                <input (click)="setLow()" type="radio" name="level" id="low"><label for="low">Low</label><br>
-                <input (click)="setMedium()" type="radio" name="level" id="medium"><label for="medium">Medium</label><br>
-                <input (click)="setHigh()" type="radio" name="level" id="high"><label for="high">High</label><br>
-                <input (click)="setTransversal()" type="radio" name="level" id="transversal"><label for="transversal">Transversal</label><br>
-                <input (click)="toggleProper()" type="checkbox" id="proper"><label for="proper">~10 seconds to attempt next level?</label>
+                <input [ngModel]="level" (click)="setLow()" type="radio" name="level" id="low" value="Low">
+                <label for="low">Low</label><br>
+                <input [ngModel]="level" (click)="setMedium()" type="radio" name="level" id="medium" value="Medium">
+                <label for="medium">Medium</label><br>
+                <input [ngModel]="level" (click)="setHigh()" type="radio" name="level" id="high" value="High">
+                <label for="high">High</label><br>
+                <input [ngModel]="level" (click)="setTransversal()" type="radio" name="level" id="transversal" value="Transversal">
+                <label for="transversal">Transversal</label><br>
+                <input [ngModel]="level" (click)="setFailed()" type="radio" name="level" id="failed" value="Failed">
+                <label for="failed">Failed</label><br>
+
+                <input (click)="toggleProper()" type="checkbox" id="proper">
+                <label for="proper">~10 seconds to attempt next level?</label>
             </form>
         </div>
         <div class="row">
@@ -104,7 +114,7 @@
             </div>
 
             <div class="col">
-                <input type="range" min="0" max="5" value="0" (input)="defensePlayedOnSlider($event)">
+                <input type="range" min="0" max="5" value="0" [(ngModel)]="defensePlayedOnScore">
             </div>
 
             <div class="col">
@@ -123,7 +133,7 @@
             </div>
 
             <div class="col">
-                <input type="range" min="0" max="5" value="0" (input)="defensePlayedSlider($event)">
+                <input type="range" min="0" max="5" value="0" [(ngModel)]="defensePlayedScore">
             </div>
 
             <div class="col">
diff --git a/y2022/BUILD b/y2022/BUILD
index 488026e..b16067d 100644
--- a/y2022/BUILD
+++ b/y2022/BUILD
@@ -39,6 +39,7 @@
         "//y2022/vision:viewer",
         "//y2022/localizer:imu_main",
         "//y2022/localizer:localizer_main",
+        "//y2022/vision:image_decimator",
     ],
     data = [
         ":aos_config",
diff --git a/y2022/control_loops/superstructure/superstructure.cc b/y2022/control_loops/superstructure/superstructure.cc
index e45917a..c87cc95 100644
--- a/y2022/control_loops/superstructure/superstructure.cc
+++ b/y2022/control_loops/superstructure/superstructure.cc
@@ -179,6 +179,44 @@
     }
   }
 
+  // Send the turret to the loading position if we have a ball in the intake, or
+  // are trying to intake one
+  double turret_loading_position = std::numeric_limits<double>::quiet_NaN();
+  if (state_ == SuperstructureState::TRANSFERRING &&
+      intake_state_ != IntakeState::NO_BALL) {
+    turret_loading_position = (intake_state_ == IntakeState::INTAKE_FRONT_BALL
+                                   ? constants::Values::kTurretFrontIntakePos()
+                                   : constants::Values::kTurretBackIntakePos());
+  } else if (state_ == SuperstructureState::IDLE && unsafe_goal != nullptr) {
+    if (unsafe_goal->roller_speed_front() > 0) {
+      turret_loading_position = constants::Values::kTurretFrontIntakePos();
+    } else if (unsafe_goal->roller_speed_back() > 0) {
+      turret_loading_position = constants::Values::kTurretBackIntakePos();
+    }
+  }
+
+  if (!std::isnan(turret_loading_position)) {
+    // Turn to the loading position as close to the current position as
+    // possible
+    // Strategy is copied from frc971/control_loops/aiming/aiming.cc
+    turret_loading_position =
+        turret_.estimated_position() +
+        aos::math::NormalizeAngle(turret_loading_position -
+                                  turret_.estimated_position());
+    // if out of range, reset back to within +/- pi of zero.
+    if (turret_loading_position > constants::Values::kTurretRange().upper ||
+        turret_loading_position < constants::Values::kTurretRange().lower) {
+      turret_loading_position =
+          aos::math::NormalizeAngle(turret_loading_position);
+    }
+
+    turret_goal_buffer.Finish(
+        frc971::control_loops::
+            CreateStaticZeroingSingleDOFProfiledSubsystemGoal(
+                *turret_goal_buffer.fbb(), turret_loading_position));
+    turret_goal = &turret_goal_buffer.message();
+  }
+
   switch (state_) {
     case SuperstructureState::IDLE: {
       if (is_spitting) {
@@ -203,31 +241,6 @@
         break;
       }
 
-      double turret_loading_position =
-          (intake_state_ == IntakeState::INTAKE_FRONT_BALL
-               ? constants::Values::kTurretFrontIntakePos()
-               : constants::Values::kTurretBackIntakePos());
-
-      // Turn to the loading position as close to the current position as
-      // possible
-      // Strategy is copied from frc971/control_loops/aiming/aiming.cc
-      turret_loading_position =
-          turret_.estimated_position() +
-          aos::math::NormalizeAngle(turret_loading_position -
-                                    turret_.estimated_position());
-      // if out of range, reset back to within +/- pi of zero.
-      if (turret_loading_position > constants::Values::kTurretRange().upper ||
-          turret_loading_position < constants::Values::kTurretRange().lower) {
-        turret_loading_position =
-            aos::math::NormalizeAngle(turret_loading_position);
-      }
-
-      turret_goal_buffer.Finish(
-          frc971::control_loops::
-              CreateStaticZeroingSingleDOFProfiledSubsystemGoal(
-                  *turret_goal_buffer.fbb(), turret_loading_position));
-      turret_goal = &turret_goal_buffer.message();
-
       const bool turret_near_goal =
           std::abs(turret_.estimated_position() - turret_loading_position) <
           kTurretGoalThreshold;
diff --git a/y2022/control_loops/superstructure/superstructure_goal.fbs b/y2022/control_loops/superstructure/superstructure_goal.fbs
index 8862d22..7816563 100644
--- a/y2022/control_loops/superstructure/superstructure_goal.fbs
+++ b/y2022/control_loops/superstructure/superstructure_goal.fbs
@@ -26,8 +26,11 @@
   intake_back:frc971.control_loops.StaticZeroingSingleDOFProfiledSubsystemGoal (id: 2);
 
   // Positive is rollers intaking.
+  // When spinning the rollers, the turret will be moved to that side,
+  // so both shouldn't be positive at the same time.
   roller_speed_front:double (id: 3);
   roller_speed_back:double (id: 4);
+
   transfer_roller_speed_front:double (id: 5);
   transfer_roller_speed_back:double (id: 12);
 
diff --git a/y2022/control_loops/superstructure/superstructure_lib_test.cc b/y2022/control_loops/superstructure/superstructure_lib_test.cc
index 66a615e..73ceee7 100644
--- a/y2022/control_loops/superstructure/superstructure_lib_test.cc
+++ b/y2022/control_loops/superstructure/superstructure_lib_test.cc
@@ -776,6 +776,7 @@
   ASSERT_TRUE(superstructure_status_fetcher_.Fetch());
   EXPECT_EQ(superstructure_output_fetcher_->roller_voltage_front(), 12.0);
   EXPECT_EQ(superstructure_output_fetcher_->roller_voltage_back(), 12.0);
+
   EXPECT_EQ(superstructure_output_fetcher_->transfer_roller_voltage_front(),
             0.0);
   EXPECT_EQ(superstructure_output_fetcher_->transfer_roller_voltage_back(),
@@ -783,8 +784,10 @@
   EXPECT_EQ(superstructure_status_fetcher_->state(), SuperstructureState::IDLE);
   EXPECT_EQ(superstructure_status_fetcher_->intake_state(),
             IntakeState::NO_BALL);
-  EXPECT_NEAR(superstructure_status_fetcher_->turret()->position(), kTurretGoal,
-              0.001);
+  // Since we spun the front rollers, the turret should be trying to intake from
+  // there
+  EXPECT_NEAR(superstructure_status_fetcher_->turret()->position(),
+              constants::Values::kTurretFrontIntakePos(), 0.001);
   EXPECT_EQ(superstructure_status_fetcher_->shot_count(), 0);
 
   superstructure_plant_.set_intake_beambreak_front(true);
diff --git a/y2022/joystick_reader.cc b/y2022/joystick_reader.cc
index 4b2f082..2f707d7 100644
--- a/y2022/joystick_reader.cc
+++ b/y2022/joystick_reader.cc
@@ -60,8 +60,8 @@
 const ButtonLocation kIntakeFrontOut(4, 10);
 const ButtonLocation kIntakeBackOut(4, 9);
 
-const ButtonLocation kRedLocalizerReset(4, 13);
-const ButtonLocation kBlueLocalizerReset(4, 14);
+const ButtonLocation kRedLocalizerReset(4, 14);
+const ButtonLocation kBlueLocalizerReset(4, 13);
 const ButtonLocation kLocalizerReset(3, 8);
 #endif
 
@@ -83,16 +83,18 @@
         setpoint_fetcher_(
             event_loop->MakeFetcher<Setpoint>("/superstructure")) {}
 
+  // Localizer reset positions are with front of robot pressed up against driver
+  // station in the middle of the field side-to-side.
   void BlueResetLocalizer() {
     auto builder = localizer_control_sender_.MakeBuilder();
 
     frc971::control_loops::drivetrain::LocalizerControl::Builder
         localizer_control_builder = builder.MakeBuilder<
             frc971::control_loops::drivetrain::LocalizerControl>();
-    localizer_control_builder.add_x(7.4);
-    localizer_control_builder.add_y(-1.7);
+    localizer_control_builder.add_x(-7.9);
+    localizer_control_builder.add_y(0.0);
     localizer_control_builder.add_theta_uncertainty(10.0);
-    localizer_control_builder.add_theta(0.0);
+    localizer_control_builder.add_theta(M_PI);
     localizer_control_builder.add_keep_current_theta(false);
     if (builder.Send(localizer_control_builder.Finish()) !=
         aos::RawSender::Error::kOk) {
@@ -106,10 +108,10 @@
     frc971::control_loops::drivetrain::LocalizerControl::Builder
         localizer_control_builder = builder.MakeBuilder<
             frc971::control_loops::drivetrain::LocalizerControl>();
-    localizer_control_builder.add_x(-7.9);
-    localizer_control_builder.add_y(0.7);
+    localizer_control_builder.add_x(7.9);
+    localizer_control_builder.add_y(0.0);
     localizer_control_builder.add_theta_uncertainty(10.0);
-    localizer_control_builder.add_theta(M_PI);
+    localizer_control_builder.add_theta(0.0);
     localizer_control_builder.add_keep_current_theta(false);
     if (builder.Send(localizer_control_builder.Finish()) !=
         aos::RawSender::Error::kOk) {
diff --git a/y2022/localizer/imu.cc b/y2022/localizer/imu.cc
index fed9ceb..2310e99 100644
--- a/y2022/localizer/imu.cc
+++ b/y2022/localizer/imu.cc
@@ -124,9 +124,9 @@
     // extra data from the pico
     imu_builder.add_pico_timestamp_us(pico_timestamp);
     imu_builder.add_left_encoder(
-        constants::Values::DrivetrainEncoderToMeters(encoder1_count));
+        -constants::Values::DrivetrainEncoderToMeters(encoder2_count));
     imu_builder.add_right_encoder(
-        constants::Values::DrivetrainEncoderToMeters(encoder2_count));
+        constants::Values::DrivetrainEncoderToMeters(encoder1_count));
     imu_builder.add_previous_reading_diag_stat(diag_stat_offset);
   }
 
diff --git a/y2022/localizer/localizer.cc b/y2022/localizer/localizer.cc
index e7b6421..14de8af 100644
--- a/y2022/localizer/localizer.cc
+++ b/y2022/localizer/localizer.cc
@@ -678,6 +678,7 @@
       aos::math::NormalizeAngle(camera_yaw + target->angle_to_target());
   debug.accepted = true;
   debug.image_age_sec = aos::time::DurationInSeconds(t_ - sample_time);
+  CHECK_LT(image_debugs_.size(), kDebugBufferSize);
   image_debugs_.push_back(debug);
 }
 
@@ -822,6 +823,7 @@
   TargetEstimateDebugT debug;
   debug.accepted = false;
   debug.rejection_reason = reason;
+  CHECK_LT(image_debugs_.size(), kDebugBufferSize);
   image_debugs_.push_back(debug);
 }
 
@@ -864,6 +866,8 @@
       clock_offset_fetcher_(
           event_loop_->MakeFetcher<aos::message_bridge::ServerStatistics>(
               "/aos")),
+  superstructure_fetcher_(event_loop_->MakeFetcher<y2022::control_loops::superstructure::Status>(
+      "/superstructure")),
       left_encoder_(-DrivetrainWrapPeriod() / 2.0, DrivetrainWrapPeriod()),
       right_encoder_(-DrivetrainWrapPeriod() / 2.0, DrivetrainWrapPeriod()) {
   event_loop_->MakeWatcher(
@@ -876,45 +880,70 @@
         model_based_.HandleReset(event_loop_->monotonic_now(),
                                  {control.x(), control.y(), theta});
       });
-  event_loop_->MakeWatcher(
-      "/superstructure",
-      [this](const y2022::control_loops::superstructure::Status &status) {
-        if (!status.has_turret()) {
-          return;
-        }
-        CHECK(status.has_turret());
-        model_based_.HandleTurret(event_loop_->context().monotonic_event_time,
-                                  status.turret()->position(),
-                                  status.turret()->velocity());
-      });
+  aos::TimerHandler *superstructure_timer = event_loop_->AddTimer([this]() {
+    if (superstructure_fetcher_.Fetch()) {
+      const y2022::control_loops::superstructure::Status &status =
+          *superstructure_fetcher_.get();
+      if (!status.has_turret()) {
+        return;
+      }
+      CHECK(status.has_turret());
+      model_based_.HandleTurret(
+          superstructure_fetcher_.context().monotonic_event_time,
+          status.turret()->position(), status.turret()->velocity());
+    }
+  });
+  event_loop_->OnRun([this, superstructure_timer]() {
+    superstructure_timer->Setup(event_loop_->monotonic_now(),
+                                std::chrono::milliseconds(20));
+  });
 
   for (size_t camera_index = 0; camera_index < kPisToUse.size(); ++camera_index) {
-    event_loop_->MakeWatcher(
-        absl::StrCat("/", kPisToUse[camera_index], "/camera"),
-        [this, camera_index](const y2022::vision::TargetEstimate &target) {
-          const std::optional<aos::monotonic_clock::duration> monotonic_offset =
-              ClockOffset(kPisToUse[camera_index]);
-          if (!monotonic_offset.has_value()) {
-            return;
-          }
-          // TODO(james): Get timestamp from message contents.
-          aos::monotonic_clock::time_point capture_time(
-              event_loop_->context().monotonic_remote_time - monotonic_offset.value());
-          if (capture_time > event_loop_->context().monotonic_event_time) {
-            model_based_.TallyRejection(RejectionReason::IMAGE_FROM_FUTURE);
-            return;
-          }
-          model_based_.HandleImageMatch(capture_time, &target, camera_index);
+    CHECK_LT(camera_index, target_estimate_fetchers_.size());
+    target_estimate_fetchers_[camera_index] =
+        event_loop_->MakeFetcher<y2022::vision::TargetEstimate>(
+            absl::StrCat("/", kPisToUse[camera_index], "/camera"));
+  }
+  aos::TimerHandler *estimate_timer = event_loop_->AddTimer(
+      [this]() {
+        for (size_t camera_index = 0; camera_index < kPisToUse.size();
+             ++camera_index) {
           if (model_based_.NumQueuedImageDebugs() ==
                   ModelBasedLocalizer::kDebugBufferSize ||
               (last_visualization_send_ + kMinVisualizationPeriod <
                event_loop_->monotonic_now())) {
             auto builder = visualization_sender_.MakeBuilder();
-            visualization_sender_.CheckOk(
-                builder.Send(model_based_.PopulateVisualization(builder.fbb())));
+            visualization_sender_.CheckOk(builder.Send(
+                model_based_.PopulateVisualization(builder.fbb())));
           }
-        });
-  }
+          if (target_estimate_fetchers_[camera_index].Fetch()) {
+            const std::optional<aos::monotonic_clock::duration>
+                monotonic_offset = ClockOffset(kPisToUse[camera_index]);
+            if (!monotonic_offset.has_value()) {
+              continue;
+            }
+            // TODO(james): Get timestamp from message contents.
+            aos::monotonic_clock::time_point capture_time(
+                target_estimate_fetchers_[camera_index]
+                    .context()
+                    .monotonic_remote_time -
+                monotonic_offset.value());
+            if (capture_time > target_estimate_fetchers_[camera_index]
+                                   .context()
+                                   .monotonic_event_time) {
+              model_based_.TallyRejection(RejectionReason::IMAGE_FROM_FUTURE);
+              continue;
+            }
+            model_based_.HandleImageMatch(
+                capture_time, target_estimate_fetchers_[camera_index].get(),
+                camera_index);
+          }
+        }
+      });
+  event_loop_->OnRun([this, estimate_timer]() {
+    estimate_timer->Setup(event_loop_->monotonic_now(),
+                          std::chrono::milliseconds(100));
+  });
   event_loop_->MakeWatcher(
       "/localizer", [this](const frc971::IMUValuesBatch &values) {
         CHECK(values.has_readings());
diff --git a/y2022/localizer/localizer.h b/y2022/localizer/localizer.h
index 4b7eff0..c19bf05 100644
--- a/y2022/localizer/localizer.h
+++ b/y2022/localizer/localizer.h
@@ -322,6 +322,10 @@
   aos::Sender<LocalizerVisualization> visualization_sender_;
   aos::Fetcher<frc971::control_loops::drivetrain::Output> output_fetcher_;
   aos::Fetcher<aos::message_bridge::ServerStatistics> clock_offset_fetcher_;
+  std::array<aos::Fetcher<y2022::vision::TargetEstimate>, 4>
+      target_estimate_fetchers_;
+  aos::Fetcher<y2022::control_loops::superstructure::Status>
+      superstructure_fetcher_;
   zeroing::ImuZeroer zeroer_;
   aos::monotonic_clock::time_point last_output_send_ =
       aos::monotonic_clock::min_time;
diff --git a/y2022/localizer/localizer_test.cc b/y2022/localizer/localizer_test.cc
index 791adf3..bf75446 100644
--- a/y2022/localizer/localizer_test.cc
+++ b/y2022/localizer/localizer_test.cc
@@ -849,19 +849,19 @@
   drivetrain_plant_.set_accel_sin_magnitude(0.01);
   drivetrain_plant_.mutable_state()->x() = 2.0;
   drivetrain_plant_.mutable_state()->y() = 2.0;
-  SendLocalizerControl(5.0, 3.0, 0.0);
+  SendLocalizerControl(6.0, 3.0, 0.0);
   event_loop_factory_.RunFor(std::chrono::seconds(1));
   CHECK(output_fetcher_.Fetch());
   CHECK(status_fetcher_.Fetch());
   ASSERT_FALSE(status_fetcher_->model_based()->using_model());
-  EXPECT_FALSE(VerifyEstimatorAccurate(0.5));
+  EXPECT_FALSE(VerifyEstimatorAccurate(3.0));
 
   send_targets_ = true;
 
   event_loop_factory_.RunFor(std::chrono::seconds(4));
   CHECK(status_fetcher_.Fetch());
   ASSERT_FALSE(status_fetcher_->model_based()->using_model());
-  EXPECT_TRUE(VerifyEstimatorAccurate(0.5));
+  EXPECT_TRUE(VerifyEstimatorAccurate(3.0));
   // y should be noticeably more accurate than x, since we are just driving
   // straight.
   ASSERT_NEAR(drivetrain_plant_.state()(1), status_fetcher_->model_based()->y(), 0.1);
diff --git a/y2022/vision/BUILD b/y2022/vision/BUILD
index 4ca8561..bede03a 100644
--- a/y2022/vision/BUILD
+++ b/y2022/vision/BUILD
@@ -252,3 +252,15 @@
         "//y2022/control_loops/superstructure:superstructure_status_fbs",
     ],
 )
+
+cc_binary(
+    name = "image_decimator",
+    srcs = ["image_decimator.cc"],
+    visibility = ["//y2022:__subpackages__"],
+    deps = [
+        "//aos:flatbuffers",
+        "//aos:init",
+        "//aos/events:shm_event_loop",
+        "//frc971/vision:vision_fbs",
+    ],
+)
diff --git a/y2022/vision/image_decimator.cc b/y2022/vision/image_decimator.cc
new file mode 100644
index 0000000..5fda423
--- /dev/null
+++ b/y2022/vision/image_decimator.cc
@@ -0,0 +1,52 @@
+#include "aos/events/shm_event_loop.h"
+#include "aos/init.h"
+#include "aos/flatbuffers.h"
+#include "frc971/vision/vision_generated.h"
+
+DEFINE_string(config, "aos_config.json", "Path to the config file to use.");
+
+namespace frc971::vision {
+// Reads images from /camera and resends them in /camera/decimated at a fixed
+// rate (1 Hz, in this case).
+class ImageDecimator {
+ public:
+  ImageDecimator(aos::EventLoop *event_loop)
+      : slow_image_sender_(
+            event_loop->MakeSender<CameraImage>("/camera/decimated")),
+        image_fetcher_(event_loop->MakeFetcher<CameraImage>("/camera")) {
+    aos::TimerHandler *timer =
+        event_loop->AddTimer(
+            [this]() {
+              if (image_fetcher_.Fetch()) {
+                const aos::FlatbufferSpan<CameraImage> image(
+                    {reinterpret_cast<const uint8_t *>(
+                         image_fetcher_.context().data),
+                     image_fetcher_.context().size});
+                slow_image_sender_.CheckOk(slow_image_sender_.Send(image));
+              }
+            });
+    event_loop->OnRun([event_loop, timer]() {
+      timer->Setup(event_loop->monotonic_now(),
+                   std::chrono::milliseconds(1000));
+    });
+  }
+
+ private:
+  aos::Sender<CameraImage> slow_image_sender_;
+  aos::Fetcher<CameraImage> image_fetcher_;
+};
+}
+
+int main(int argc, char *argv[]) {
+  aos::InitGoogle(&argc, &argv);
+
+  aos::FlatbufferDetachedBuffer<aos::Configuration> config =
+      aos::configuration::ReadConfig(FLAGS_config);
+
+  aos::ShmEventLoop event_loop(&config.message());
+  frc971::vision::ImageDecimator decimator(&event_loop);
+
+  event_loop.Run();
+
+  return 0;
+}
diff --git a/y2022/y2022_logger.json b/y2022/y2022_logger.json
index d6fa4a4..edf52ab 100644
--- a/y2022/y2022_logger.json
+++ b/y2022/y2022_logger.json
@@ -322,7 +322,7 @@
       "max_size": 200
     },
     {
-      "name": "/pi1/camera",
+      "name": "/pi1/camera/decimated",
       "type": "frc971.vision.CameraImage",
       "source_node": "pi1",
       "logger": "LOCAL_AND_REMOTE_LOGGER",
@@ -338,7 +338,7 @@
       ]
     },
     {
-      "name": "/pi2/camera",
+      "name": "/pi2/camera/decimated",
       "type": "frc971.vision.CameraImage",
       "source_node": "pi2",
       "logger": "LOCAL_AND_REMOTE_LOGGER",
@@ -354,7 +354,7 @@
       ]
     },
     {
-      "name": "/pi3/camera",
+      "name": "/pi3/camera/decimated",
       "type": "frc971.vision.CameraImage",
       "source_node": "pi3",
       "logger": "LOCAL_AND_REMOTE_LOGGER",
@@ -370,7 +370,7 @@
       ]
     },
     {
-      "name": "/pi4/camera",
+      "name": "/pi4/camera/decimated",
       "type": "frc971.vision.CameraImage",
       "source_node": "pi4",
       "logger": "LOCAL_AND_REMOTE_LOGGER",
diff --git a/y2022/y2022_pi_template.json b/y2022/y2022_pi_template.json
index 7f49e41..27bc251 100644
--- a/y2022/y2022_pi_template.json
+++ b/y2022/y2022_pi_template.json
@@ -146,6 +146,14 @@
       "num_senders": 18
     },
     {
+      "name": "/pi{{ NUM }}/camera/decimated",
+      "type": "frc971.vision.CameraImage",
+      "source_node": "pi{{ NUM }}",
+      "frequency": 2,
+      "max_size": 620000,
+      "num_senders": 18
+    },
+    {
       "name": "/pi{{ NUM }}/camera",
       "type": "frc971.vision.calibration.CalibrationData",
       "source_node": "pi{{ NUM }}",
@@ -328,6 +336,13 @@
       "nodes": [
         "pi{{ NUM }}"
       ]
+    },
+    {
+      "name": "image_decimator",
+      "executable_name": "image_decimator",
+      "nodes": [
+        "pi{{ NUM }}"
+      ]
     }
   ],
   "maps": [