From 162187608bbaf1f79d38c88803754c8e58359129 Mon Sep 17 00:00:00 2001
From: Patrick Simianer <p@simianer.de>
Date: Sat, 26 Nov 2016 12:40:34 +0100
Subject: cleanup

---
 display-histogram.cpp | 80 ---------------------------------------------------
 1 file changed, 80 deletions(-)
 delete mode 100644 display-histogram.cpp

(limited to 'display-histogram.cpp')

diff --git a/display-histogram.cpp b/display-histogram.cpp
deleted file mode 100644
index 17f5a14..0000000
--- a/display-histogram.cpp
+++ /dev/null
@@ -1,80 +0,0 @@
-/**
- * Code sample for displaying image histogram in OpenCV.
- */
-#include <opencv2/imgproc/imgproc.hpp>
-#include <opencv2/highgui/highgui.hpp>
-#include <iostream>
-
-using namespace cv;
-using namespace std;
-
-void showHistogram(Mat& img)
-{
-	int bins = 256;             // number of bins
-	int nc = img.channels();    // number of channels
-
-	vector<Mat> hist(nc);       // histogram arrays
-
-	// Initalize histogram arrays
-	for (int i = 0; i < hist.size(); i++)
-		hist[i] = Mat::zeros(1, bins, CV_32SC1);
-
-	// Calculate the histogram of the image
-	for (int i = 0; i < img.rows; i++)
-	{
-		for (int j = 0; j < img.cols; j++)
-		{
-			for (int k = 0; k < nc; k++)
-			{
-				uchar val = nc == 1 ? img.at<uchar>(i,j) : img.at<Vec3b>(i,j)[k];
-				hist[k].at<int>(val) += 1;
-			}
-		}
-	}
-
-	// For each histogram arrays, obtain the maximum (peak) value
-	// Needed to normalize the display later
-	int hmax[3] = {0,0,0};
-	for (int i = 0; i < nc; i++)
-	{
-		for (int j = 0; j < bins-1; j++)
-			hmax[i] = hist[i].at<int>(j) > hmax[i] ? hist[i].at<int>(j) : hmax[i];
-	}
-
-	const char* wname[3] = { "blue", "green", "red" };
-	Scalar colors[3] = { Scalar(255,0,0), Scalar(0,255,0), Scalar(0,0,255) };
-
-	vector<Mat> canvas(nc);
-
-	// Display each histogram in a canvas
-	for (int i = 0; i < nc; i++)
-	{
-		canvas[i] = Mat::ones(125, bins, CV_8UC3);
-
-		for (int j = 0, rows = canvas[i].rows; j < bins-1; j++)
-		{
-			line(
-				canvas[i], 
-				Point(j, rows), 
-				Point(j, rows - (hist[i].at<int>(j) * rows/hmax[i])), 
-				nc == 1 ? Scalar(200,200,200) : colors[i], 
-				1, 8, 0
-			);
-		}
-
-		imshow(nc == 1 ? "value" : wname[i], canvas[i]);
-	}
-}
-
-// Test the `showHistogram()` function above
-int main()
-{
-	Mat src = imread("c:/users/nash/desktop/assets/lena.jpg");
-	if (src.empty())
-		return -1;
-	showHistogram(src);
-	imshow("src", src);
-	waitKey(0);
-	return 0;
-}
-
-- 
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