From b90566585a04dc99b8f82505d1d34b47f1ec683b Mon Sep 17 00:00:00 2001
From: Matt Hill <matthill@gmail.com>
Date: Mon, 24 Mar 2014 10:10:55 -0500
Subject: [PATCH] Added variable to control plate detection size increase.
 Adjusting it to a smaller value means slower detection but higher probability
 that the plate will be found (and vice versa)

---
 runtime_data/openalpr.conf      | 6 ++++--
 src/openalpr/config.cpp         | 3 +++
 src/openalpr/config.h           | 2 ++
 src/openalpr/regiondetector.cpp | 4 ++--
 4 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/runtime_data/openalpr.conf b/runtime_data/openalpr.conf
index b204592..382ef3d 100644
--- a/runtime_data/openalpr.conf
+++ b/runtime_data/openalpr.conf
@@ -6,6 +6,8 @@ state_id_img_size_percent = 2.0
 max_plate_width_percent = 100
 max_plate_height_percent = 100
 
+detection_iteration_increase = 1.1
+
 opencl_enabled = 0
 
 ocr_min_font_point = 6
@@ -25,7 +27,7 @@ postprocess_min_characters = 4
 postprocess_max_characters = 8
 
 [debug]
-general       = 0
+general       = 1
 timing        = 0
 state_id      = 0
 plate_lines   = 0
@@ -36,7 +38,7 @@ char_analysis = 0
 color_filter  = 0
 ocr           = 0
 postprocess   = 0
-show_images   = 0
+show_images   = 1
 
 ;;; Country Specific variables ;;;;
 
diff --git a/src/openalpr/config.cpp b/src/openalpr/config.cpp
index f57c42f..3ebf922 100644
--- a/src/openalpr/config.cpp
+++ b/src/openalpr/config.cpp
@@ -71,6 +71,9 @@ void Config::loadValues(string country)
 {
 
   opencl_enabled = getBoolean("common", "opencl_enabled", false);
+  
+  detection_iteration_increase = getFloat("common", "detection_iteration_increase", 1.1);
+  
   maxPlateWidthPercent = getFloat("common", "max_plate_width_percent", 100);
   maxPlateHeightPercent = getFloat("common", "max_plate_height_percent", 100);
 
diff --git a/src/openalpr/config.h b/src/openalpr/config.h
index 78e6b7e..7328576 100644
--- a/src/openalpr/config.h
+++ b/src/openalpr/config.h
@@ -45,6 +45,8 @@ class Config
 
     bool opencl_enabled;
 
+    float detection_iteration_increase;
+    
     float maxPlateWidthPercent;
     float maxPlateHeightPercent;
 
diff --git a/src/openalpr/regiondetector.cpp b/src/openalpr/regiondetector.cpp
index 3f8f061..d2a7023 100644
--- a/src/openalpr/regiondetector.cpp
+++ b/src/openalpr/regiondetector.cpp
@@ -90,12 +90,12 @@ vector<Rect> RegionDetector::doCascade(Mat frame)
   if (config->opencl_enabled)
   {
     ocl::oclMat openclFrame(frame);
-    ((ocl::OclCascadeClassifier*) plate_cascade)->detectMultiScale(openclFrame, plates, 1.1, 3, 0, minSize, maxSize);
+    ((ocl::OclCascadeClassifier*) plate_cascade)->detectMultiScale(openclFrame, plates, config->detection_iteration_increase, 3, 0, minSize, maxSize);
   }
   else
   {
 
-    plate_cascade->detectMultiScale( frame, plates, 1.1, 3,
+    plate_cascade->detectMultiScale( frame, plates, config->detection_iteration_increase, 3,
                                      0,
                                      //0|CV_HAAR_SCALE_IMAGE,
                                      minSize, maxSize );