From c724f79b2fefc2a22411b7895a9c87a024cc21b3 Mon Sep 17 00:00:00 2001
From: Kamila Malanowicz <kamila.malanowicz@snpgroup.com>
Date: Wed, 29 Apr 2020 20:43:13 +0200
Subject: [PATCH] Zadanie 5 - Binaryzacja

---
 .../src/core/transformations/bin_gradient.cpp | 35 ++++++++++++++++++-
 .../src/core/transformations/bin_manual.cpp   | 12 ++++++-
 2 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/lpo-projekt-v2/src/core/transformations/bin_gradient.cpp b/lpo-projekt-v2/src/core/transformations/bin_gradient.cpp
index d502adb..50b49e6 100644
--- a/lpo-projekt-v2/src/core/transformations/bin_gradient.cpp
+++ b/lpo-projekt-v2/src/core/transformations/bin_gradient.cpp
@@ -14,10 +14,43 @@ PNM* BinarizationGradient::transform()
 {
     int width = image->width();
     int height = image->height();
+    int x = 0;
+    int y = 0;
+    double threshold = 0.0;
 
     PNM* newImage = new PNM(width, height, QImage::Format_Mono);
 
-    qDebug() << Q_FUNC_INFO << "Not implemented yet!";
+    for (int i=0; i<width; i++) {
+        for (int j=0; j<height; j++) {
+            int px = qGray(image->pixel(i,j));
+            int pxl = qGray(image->pixel(i-1,j));
+            int pxr = qGray(image->pixel(i+1,j));
+            int pxt = qGray(image->pixel(i,j+1));
+            int pxb = qGray(image->pixel(i,j-1));
+
+            int gx = pxr - pxl;
+            int gy = pxt - pxb;
+
+            int max = std::max(gx, gy);
+
+            x = x + max * px;
+            y = y + max;
+        }
+    }
+
+    threshold = x / y;
+
+    for (int i=0; i<width; i++) {
+        for (int j=0; j<height; j++) {
+            int l = qGray(image->pixel(i,j));
+
+            if (l < threshold) {
+                newImage->setPixel(i, j, Qt::color0);
+            } else {
+                newImage->setPixel(i, j, Qt::color1);
+            }
+        }
+    }
 
     return newImage;
 }
diff --git a/lpo-projekt-v2/src/core/transformations/bin_manual.cpp b/lpo-projekt-v2/src/core/transformations/bin_manual.cpp
index a410dfa..f7c29c6 100644
--- a/lpo-projekt-v2/src/core/transformations/bin_manual.cpp
+++ b/lpo-projekt-v2/src/core/transformations/bin_manual.cpp
@@ -19,7 +19,17 @@ PNM* BinarizationManual::transform()
 
     PNM* newImage = new PNM(width, height, QImage::Format_Mono);
 
-    qDebug() << Q_FUNC_INFO << "Not implemented yet!";
+    for (int i=0; i<width; i++) {
+        for (int j=0; j<height; j++) {
+            int l = qGray(image->pixel(i,j));
+
+            if (l < threshold) {
+                newImage->setPixel(i, j, Qt::color0);
+            } else {
+                newImage->setPixel(i, j, Qt::color1);
+            }
+        }
+    }
 
     return newImage;
 }