tracker/nn: Add resolution setting and tooltips

Tooltips only for half of the settings or so. When hovering over the
actual input boxes.

7 files changed, 369 insertions, 73 deletions

diff --git a/tracker-neuralnet/ftnoir_tracker_neuralnet.cpp b/tracker-neuralnet/ftnoir_tracker_neuralnet.cpp
index 00f3f281..f849f4e1 100644
--- a/tracker-neuralnet/ftnoir_tracker_neuralnet.cpp
+++ b/tracker-neuralnet/ftnoir_tracker_neuralnet.cpp
@@ -16,7 +16,6 @@
 #include <opencv2/imgcodecs.hpp>
 #include "compat/timer.hpp"
 #include <omp.h>
-#include <stdexcept>
 
 #ifdef _MSC_VER
 #   pragma warning(disable : 4702)
@@ -31,6 +30,8 @@
 #include <algorithm>
 #include <chrono>
 #include <string>
+#include <stdexcept>
+
 
 // Some demo code for onnx
 // https://github.com/microsoft/onnxruntime/blob/master/csharp/test/Microsoft.ML.OnnxRuntime.EndToEndTests.Capi/C_Api_Sample.cpp
@@ -59,6 +60,35 @@ float sigmoid(float x)
 }
 
 
+cv::Rect make_crop_rect_for_aspect(const cv::Size &size, int aspect_w, int aspect_h)
+{
+    auto [w, h] = size;
+    if ( w*aspect_h > aspect_w*h )
+    {
+        // Image is too wide
+        const int new_w = (aspect_w*h)/aspect_h;
+        return cv::Rect((w - new_w)/2, 0, new_w, h);
+    }
+    else
+    {
+        const int new_h = (aspect_h*w)/aspect_w;
+        return cv::Rect(0, (h - new_h)/2, w, new_h);
+    }
+}
+
+cv::Rect make_crop_rect_multiple_of(const cv::Size &size, int multiple)
+{
+    const int new_w = (size.width / multiple) * multiple;
+    const int new_h = (size.height / multiple) * multiple;
+    return cv::Rect(
+        (size.width-new_w)/2,
+        (size.height-new_h)/2,
+        new_w,
+        new_h
+    );
+}
+
+
 template<class T>
 cv::Rect_<T> squarize(const cv::Rect_<T> &r)
 {
@@ -752,7 +782,6 @@ module_status neuralnet_tracker::start_tracker(QFrame* videoframe)
     videoframe->setLayout(&*layout);
     videoWidget->show();
     num_threads = settings.num_threads;
-    cv::setNumThreads(num_threads);
     start();
     return status_ok();
 }
@@ -774,8 +803,7 @@ bool neuralnet_tracker::load_and_initialize_model()
         auto opts = Ort::SessionOptions{};
         // Do thread settings here do anything?
         // There is a warning which says to control number of threads via
-        // openmp settings. Which is what we do. omp_set_num_threads directly
-        // before running the inference pass.
+        // openmp settings. Which is what we do.
         opts.SetIntraOpNumThreads(num_threads);
         opts.SetInterOpNumThreads(1);
         allocator_info = Ort::MemoryInfo::CreateCpu(OrtArenaAllocator, OrtMemTypeDefault);
@@ -800,6 +828,8 @@ bool neuralnet_tracker::load_and_initialize_model()
 
 bool neuralnet_tracker::open_camera()
 {
+    int rint = std::clamp(*settings.resolution, 0, (int)std::size(resolution_choices)-1);
+    resolution_tuple res = resolution_choices[rint];
     int fps = enum_to_fps(settings.force_fps);
 
     QMutexLocker l(&camera_mtx);
@@ -811,9 +841,11 @@ bool neuralnet_tracker::open_camera()
 
     video::impl::camera::info args {};
 
-    args.width = 320;
-    args.height = 240;
-
+    if (res.width)
+    {
+        args.width = res.width;
+        args.height = res.height;
+    }
     if (fps)
         args.fps = fps;
 
@@ -844,8 +876,34 @@ void neuralnet_tracker::set_intrinsics()
 }
 
 
+class GuardedThreadCountSwitch
+{
+    int old_num_threads_cv = 1;
+    int old_num_threads_omp = 1;
+    public:
+        GuardedThreadCountSwitch(int num_threads)
+        {
+            old_num_threads_cv = cv::getNumThreads();
+            old_num_threads_omp = omp_get_num_threads();
+            omp_set_num_threads(num_threads);
+            cv::setNumThreads(num_threads);
+        }
+            
+        ~GuardedThreadCountSwitch()
+        {
+            omp_set_num_threads(old_num_threads_omp);
+            cv::setNumThreads(old_num_threads_cv);
+        }
+
+        GuardedThreadCountSwitch(const GuardedThreadCountSwitch&) = delete;
+        GuardedThreadCountSwitch& operator=(const GuardedThreadCountSwitch&) = delete;
+};
+
+
 void neuralnet_tracker::run()
 {
+    GuardedThreadCountSwitch switch_num_threads_to(num_threads);
+
     if (!open_camera())
         return;
 
@@ -870,7 +928,8 @@ void neuralnet_tracker::run()
                 continue;
             }
 
-            auto color = cv::Mat(img.height, img.width, CV_8UC(img.channels), (void*)img.data, img.stride);
+            auto color = prepare_input_image(img);
+
             color.copyTo(frame);
 
             switch (img.channels)
@@ -890,13 +949,8 @@ void neuralnet_tracker::run()
 
         set_intrinsics();
 
-        const auto nt = omp_get_num_threads();
-        omp_set_num_threads(num_threads);
-
         detect();
 
-        omp_set_num_threads(nt);
-
         if (frame.rows > 0)
             videoWidget->update_image(frame);
         
@@ -907,6 +961,33 @@ void neuralnet_tracker::run()
 }
 
 
+cv::Mat neuralnet_tracker::prepare_input_image(const video::frame& frame)
+{
+    auto img = cv::Mat(frame.height, frame.width, CV_8UC(frame.channels), (void*)frame.data, frame.stride);
+
+    // Crop if aspect ratio is not 4:3
+    if (img.rows*4 != img.cols*3)
+    {
+        img = img(make_crop_rect_for_aspect(img.size(), 4, 3));
+    }
+
+    img = img(make_crop_rect_multiple_of(img.size(), 4));
+
+    if (img.cols > 640)
+    {
+        cv::pyrDown(img, downsized_original_images_[0]);
+        img = downsized_original_images_[0];
+    }
+    if (img.cols > 640)
+    {
+        cv::pyrDown(img, downsized_original_images_[1]);
+        img = downsized_original_images_[1];
+    }
+
+    return img;
+}
+
+
 void neuralnet_tracker::update_fps(double dt)
 {
     const double alpha = dt/(dt + RC);
@@ -965,6 +1046,18 @@ void neuralnet_dialog::make_fps_combobox()
     }
 }
 
+void neuralnet_dialog::make_resolution_combobox()
+{
+    int k=0;
+    for (const auto [w, h] : resolution_choices)
+    {
+        const QString s = (w == 0) 
+            ? tr("Default") 
+            : QString::number(w) + " x " + QString::number(h);
+        ui.resolution->addItem(s, k++);
+    }
+}
+
 
 neuralnet_dialog::neuralnet_dialog() :
     trans_calib(1, 2)
@@ -972,7 +1065,7 @@ neuralnet_dialog::neuralnet_dialog() :
     ui.setupUi(this);
 
     make_fps_combobox();
-    tie_setting(settings.force_fps, ui.cameraFPS);
+    make_resolution_combobox();
 
     for (const auto& str : video::camera_names())
         ui.cameraName->addItem(str);
@@ -987,6 +1080,8 @@ neuralnet_dialog::neuralnet_dialog() :
     tie_setting(settings.use_mjpeg, ui.use_mjpeg);
 	tie_setting(settings.roi_zoom, ui.roiZoom);
     tie_setting(settings.num_threads, ui.threadCount);
+    tie_setting(settings.resolution, ui.resolution);
+    tie_setting(settings.force_fps, ui.cameraFPS);
 
     connect(ui.buttonBox, SIGNAL(accepted()), this, SLOT(doOK()));
     connect(ui.buttonBox, SIGNAL(rejected()), this, SLOT(doCancel()));
diff --git a/tracker-neuralnet/ftnoir_tracker_neuralnet.h b/tracker-neuralnet/ftnoir_tracker_neuralnet.h
index 25f1a0a2..ace16528 100644
--- a/tracker-neuralnet/ftnoir_tracker_neuralnet.h
+++ b/tracker-neuralnet/ftnoir_tracker_neuralnet.h
@@ -25,6 +25,7 @@
 
 #include <memory>
 #include <cinttypes>
+#include <array>
 
 #include <onnxruntime_cxx_api.h>
 
@@ -49,6 +50,23 @@ enum fps_choices
     fps_MAX     = 3
 };
 
+struct resolution_tuple
+{
+    int width;
+    int height;
+};
+
+static const std::array<resolution_tuple, 7> resolution_choices =
+{{
+    { 320, 240 },
+    { 640, 480 },
+    { 800, 600 },
+    { 1024, 768 },
+    { 1280, 720 },
+    { 1920, 1080},
+    { 0, 0 }
+}};
+
 
 struct Settings : opts {
     value<int> offset_fwd { b, "offset-fwd", 200 }, // Millimeters
@@ -62,6 +80,7 @@ struct Settings : opts {
     value<double> roi_zoom{ b, "roi-zoom", 1. };
     value<bool> use_mjpeg { b, "use-mjpeg", false };
     value<int> num_threads { b, "num-threads", 1 };
+    value<int> resolution { b, "force-resolution", 0 };
     Settings();
 };
 
@@ -159,6 +178,7 @@ private:
     bool detect();
     bool open_camera();
     void set_intrinsics();
+    cv::Mat prepare_input_image(const video::frame& frame);
     bool load_and_initialize_model();
     void draw_gizmos(
         cv::Mat frame,  
@@ -176,6 +196,7 @@ private:
 
     CamIntrinsics intrinsics{};
     cv::Mat frame, grayscale;
+    std::array<cv::Mat,2> downsized_original_images_ = {}; // Image pyramid
     std::optional<cv::Rect2f> last_localizer_roi;
     std::optional<cv::Rect2f> last_roi;
     static constexpr float head_size_mm = 200.f;
@@ -202,6 +223,7 @@ public:
     void unregister_tracker() override;
 private:
     void make_fps_combobox();
+    void make_resolution_combobox();
 
     Ui::Form ui;
     Settings settings;
diff --git a/tracker-neuralnet/lang/nl_NL.ts b/tracker-neuralnet/lang/nl_NL.ts
index 95da8f4c..cb6d1da0 100644
--- a/tracker-neuralnet/lang/nl_NL.ts
+++ b/tracker-neuralnet/lang/nl_NL.ts
@@ -80,6 +80,38 @@ Don&apos;t roll or change position.</source>
         <source>Thread Count</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Resolution</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Field of view. Needed to transform the pose to world coordinates.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Requested video frame rate. Actual setting may not be supported by the camera.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>The requested resolution for cases where the camera delivers maximum frame rate only for a particular resolution. The image may still be downscaled to the internal resolution.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of threads. Can be used to balance the CPU load between the game and the tracker.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Show the image patch that the pose estimation model sees.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Amount of smoothing of the face region coordinates. Can help stabilize the pose.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Zoom factor for the face region. Applied before the patch is fed into the pose estimation model. There is a sweet spot near 1.</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>neuralnet_tracker_ns::neuralnet_dialog</name>
diff --git a/tracker-neuralnet/lang/ru_RU.ts b/tracker-neuralnet/lang/ru_RU.ts
index a8252299..ed69e9a7 100644
--- a/tracker-neuralnet/lang/ru_RU.ts
+++ b/tracker-neuralnet/lang/ru_RU.ts
@@ -80,6 +80,38 @@ Don&apos;t roll or change position.</source>
         <source>Thread Count</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Resolution</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Field of view. Needed to transform the pose to world coordinates.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Requested video frame rate. Actual setting may not be supported by the camera.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>The requested resolution for cases where the camera delivers maximum frame rate only for a particular resolution. The image may still be downscaled to the internal resolution.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of threads. Can be used to balance the CPU load between the game and the tracker.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Show the image patch that the pose estimation model sees.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Amount of smoothing of the face region coordinates. Can help stabilize the pose.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Zoom factor for the face region. Applied before the patch is fed into the pose estimation model. There is a sweet spot near 1.</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>neuralnet_tracker_ns::neuralnet_dialog</name>
diff --git a/tracker-neuralnet/lang/stub.ts b/tracker-neuralnet/lang/stub.ts
index 80103fde..db45f47a 100644
--- a/tracker-neuralnet/lang/stub.ts
+++ b/tracker-neuralnet/lang/stub.ts
@@ -80,6 +80,38 @@ Don&apos;t roll or change position.</source>
         <source>Thread Count</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Resolution</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Field of view. Needed to transform the pose to world coordinates.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Requested video frame rate. Actual setting may not be supported by the camera.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>The requested resolution for cases where the camera delivers maximum frame rate only for a particular resolution. The image may still be downscaled to the internal resolution.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of threads. Can be used to balance the CPU load between the game and the tracker.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Show the image patch that the pose estimation model sees.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Amount of smoothing of the face region coordinates. Can help stabilize the pose.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Zoom factor for the face region. Applied before the patch is fed into the pose estimation model. There is a sweet spot near 1.</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>neuralnet_tracker_ns::neuralnet_dialog</name>
diff --git a/tracker-neuralnet/lang/zh_CN.ts b/tracker-neuralnet/lang/zh_CN.ts
index f55c12fc..d13219f0 100644
--- a/tracker-neuralnet/lang/zh_CN.ts
+++ b/tracker-neuralnet/lang/zh_CN.ts
@@ -80,6 +80,38 @@ Don&apos;t roll or change position.</source>
         <source>Thread Count</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Resolution</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Field of view. Needed to transform the pose to world coordinates.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Requested video frame rate. Actual setting may not be supported by the camera.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>The requested resolution for cases where the camera delivers maximum frame rate only for a particular resolution. The image may still be downscaled to the internal resolution.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of threads. Can be used to balance the CPU load between the game and the tracker.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Show the image patch that the pose estimation model sees.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Amount of smoothing of the face region coordinates. Can help stabilize the pose.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Zoom factor for the face region. Applied before the patch is fed into the pose estimation model. There is a sweet spot near 1.</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>neuralnet_tracker_ns::neuralnet_dialog</name>
diff --git a/tracker-neuralnet/neuralnet-trackercontrols.ui b/tracker-neuralnet/neuralnet-trackercontrols.ui
index acbfe909..43b316e9 100644
--- a/tracker-neuralnet/neuralnet-trackercontrols.ui
+++ b/tracker-neuralnet/neuralnet-trackercontrols.ui
@@ -9,8 +9,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>721</width>
-    <height>277</height>
+    <width>647</width>
+    <height>305</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -60,13 +60,10 @@
          <string>Camera Configuration</string>
         </property>
         <layout class="QGridLayout" name="gridLayout_4">
-         <item row="3" column="1">
-          <widget class="QComboBox" name="cameraName">
-           <property name="sizePolicy">
-            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
-             <horstretch>0</horstretch>
-             <verstretch>0</verstretch>
-            </sizepolicy>
+         <item row="4" column="0">
+          <widget class="QLabel" name="resolution_label">
+           <property name="text">
+            <string>Resolution</string>
            </property>
           </widget>
          </item>
@@ -78,6 +75,9 @@
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
+           <property name="toolTip">
+            <string>Field of view. Needed to transform the pose to world coordinates.</string>
+           </property>
            <property name="locale">
             <locale language="English" country="UnitedStates"/>
            </property>
@@ -96,20 +96,6 @@
            </property>
           </widget>
          </item>
-         <item row="2" column="0">
-          <widget class="QLabel" name="label_11">
-           <property name="text">
-            <string>MJPEG</string>
-           </property>
-          </widget>
-         </item>
-         <item row="3" column="0">
-          <widget class="QLabel" name="label_10">
-           <property name="text">
-            <string>Camera name</string>
-           </property>
-          </widget>
-         </item>
          <item row="0" column="0">
           <widget class="QLabel" name="label_9">
            <property name="text">
@@ -125,31 +111,65 @@
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
+           <property name="toolTip">
+            <string>Requested video frame rate. Actual setting may not be supported by the camera.</string>
+           </property>
           </widget>
          </item>
-         <item row="2" column="1">
-          <widget class="QCheckBox" name="use_mjpeg">
+         <item row="7" column="1">
+          <widget class="QPushButton" name="camera_settings">
            <property name="sizePolicy">
-            <sizepolicy hsizetype="Minimum" vsizetype="Maximum">
+            <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="text">
-            <string/>
+            <string>Camera settings</string>
            </property>
           </widget>
          </item>
          <item row="4" column="1">
-          <widget class="QPushButton" name="camera_settings">
+          <widget class="QComboBox" name="resolution">
+           <property name="toolTip">
+            <string>The requested resolution for cases where the camera delivers maximum frame rate only for a particular resolution. The image may still be downscaled to the internal resolution.</string>
+           </property>
+          </widget>
+         </item>
+         <item row="6" column="1">
+          <widget class="QComboBox" name="cameraName">
            <property name="sizePolicy">
-            <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
+            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
+          </widget>
+         </item>
+         <item row="6" column="0">
+          <widget class="QLabel" name="label_10">
            <property name="text">
-            <string>Camera settings</string>
+            <string>Camera name</string>
+           </property>
+          </widget>
+         </item>
+         <item row="5" column="1">
+          <widget class="QCheckBox" name="use_mjpeg">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Minimum" vsizetype="Maximum">
+             <horstretch>0</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item row="5" column="0">
+          <widget class="QLabel" name="label_11">
+           <property name="text">
+            <string>MJPEG</string>
            </property>
           </widget>
          </item>
@@ -189,6 +209,12 @@
             <enum>QFrame::Raised</enum>
            </property>
            <layout class="QGridLayout" name="gridLayout_11">
+            <property name="sizeConstraint">
+             <enum>QLayout::SetDefaultConstraint</enum>
+            </property>
+            <property name="verticalSpacing">
+             <number>0</number>
+            </property>
             <item row="1" column="1">
              <widget class="QSpinBox" name="ty_spin">
               <property name="maximumSize">
@@ -382,21 +408,34 @@ Don't roll or change position.</string>
       <string>Tuning / Debug</string>
      </property>
      <layout class="QGridLayout" name="gridLayout_2">
-      <item row="0" column="7">
-       <widget class="Line" name="line_3">
+      <item row="0" column="10">
+       <widget class="Line" name="line_2">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
         </property>
        </widget>
       </item>
-      <item row="0" column="8">
-       <widget class="QLabel" name="threadCountLabel">
-        <property name="text">
-         <string>Thread Count</string>
+      <item row="0" column="1">
+       <widget class="QSpinBox" name="threadCount">
+        <property name="toolTip">
+         <string>Number of threads. Can be used to balance the CPU load between the game and the tracker.</string>
+        </property>
+        <property name="minimum">
+         <number>1</number>
+        </property>
+        <property name="maximum">
+         <number>32</number>
         </property>
        </widget>
       </item>
-      <item row="0" column="2">
+      <item row="0" column="4">
+       <widget class="Line" name="line">
+        <property name="orientation">
+         <enum>Qt::Vertical</enum>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="8">
        <widget class="QLabel" name="roiFilterAlphaLabel">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
@@ -409,14 +448,21 @@ Don't roll or change position.</string>
         </property>
        </widget>
       </item>
-      <item row="0" column="1">
-       <widget class="Line" name="line">
+      <item row="0" column="11">
+       <widget class="QLabel" name="roiZoomLabel">
+        <property name="text">
+         <string>ROI Zoom</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="2">
+       <widget class="Line" name="line_3">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
         </property>
        </widget>
       </item>
-      <item row="0" column="0">
+      <item row="0" column="3">
        <widget class="QCheckBox" name="showNetworkInput">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
@@ -424,12 +470,15 @@ Don't roll or change position.</string>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
+        <property name="toolTip">
+         <string>Show the image patch that the pose estimation model sees.</string>
+        </property>
         <property name="text">
          <string>Show Network Input</string>
         </property>
        </widget>
       </item>
-      <item row="0" column="3">
+      <item row="0" column="9">
        <widget class="QDoubleSpinBox" name="roiFilterAlpha">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
@@ -443,6 +492,9 @@ Don't roll or change position.</string>
           <height>16777215</height>
          </size>
         </property>
+        <property name="toolTip">
+         <string>Amount of smoothing of the face region coordinates. Can help stabilize the pose.</string>
+        </property>
         <property name="wrapping">
          <bool>false</bool>
         </property>
@@ -460,22 +512,18 @@ Don't roll or change position.</string>
         </property>
        </widget>
       </item>
-      <item row="0" column="5">
-       <widget class="QLabel" name="roiZoomLabel">
+      <item row="0" column="0">
+       <widget class="QLabel" name="threadCountLabel">
         <property name="text">
-         <string>ROI Zoom</string>
-        </property>
-       </widget>
-      </item>
-      <item row="0" column="4">
-       <widget class="Line" name="line_2">
-        <property name="orientation">
-         <enum>Qt::Vertical</enum>
+         <string>Thread Count</string>
         </property>
        </widget>
       </item>
-      <item row="0" column="6">
+      <item row="0" column="12">
        <widget class="QDoubleSpinBox" name="roiZoom">
+        <property name="toolTip">
+         <string>Zoom factor for the face region. Applied before the patch is fed into the pose estimation model. There is a sweet spot near 1.</string>
+        </property>
         <property name="minimum">
          <double>0.100000000000000</double>
         </property>
@@ -490,15 +538,18 @@ Don't roll or change position.</string>
         </property>
        </widget>
       </item>
-      <item row="0" column="9">
-       <widget class="QSpinBox" name="threadCount">
-        <property name="minimum">
-         <number>1</number>
+      <item row="0" column="13">
+       <spacer name="horizontalSpacer">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
         </property>
-        <property name="maximum">
-         <number>32</number>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>40</width>
+          <height>20</height>
+         </size>
         </property>
-       </widget>
+       </spacer>
       </item>
      </layout>
     </widget>