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diff --git a/tests/src/imageRec.c b/tests/src/imageRec.c
new file mode 100644
index 0000000..9727948
--- /dev/null
+++ b/tests/src/imageRec.c
@@ -0,0 +1,515 @@
+#include <stdio.h>
+#include "imageRec.h"
+
+const short sobelFilterKernel[3][3] = { { 3, 10, 3 }, { 0, 0, 0 }, { -3, -10, -3 } };
+const imageBuffer gausFilterKernel[5] = { 25, 61, 83, 61, 25 };
+
+int imageWidth = 0;
+int imageHight = 0;
+int imageBufferSize = 0;
+
+int setImageSize(int width, int hight)
+{
+	imageWidth = width;
+	imageHight = hight;
+	imageBufferSize = width * hight;
+
+	return imageBufferSize;
+}
+
+void normalizeImage(imageBuffer* srcImage, imageBuffer* dstImage)
+{
+	int min = 0xFFFF;
+	int max = 0;
+	unsigned int factor;
+
+	for (int i = 0; i < imageBufferSize; i++)
+	{
+		if (srcImage[i] < min) min = srcImage[i];
+		if (srcImage[i] > max) max = srcImage[i];
+	}
+
+	factor = (1 << 30) / (max - min + 1);
+
+	for (int i = 0; i < imageBufferSize; i++)
+	{
+		dstImage[i] = (imageBuffer)((srcImage[i] - min) * factor / (1<<14));
+	}
+}
+
+void gausFilter(imageBuffer * image, imageBuffer * helperImage)
+{
+	int n = sizeof(gausFilterKernel) / sizeof(gausFilterKernel[0]);
+	int acc;
+	int acck = 0;
+	int i = 0;
+
+	for (int y = 0; y < imageHight; y++)
+	{
+		for (int x = 0; x < imageWidth; x++)
+		{
+			acc = 0;
+			acck = 0;
+
+			for (int j = 0; j < n; j++)
+			{
+				int pos = x + j - n / 2;
+
+				if (pos >= 0 && pos < imageWidth)
+				{
+					acc += image[i + j - n / 2] * gausFilterKernel[j];
+					acck += gausFilterKernel[j];
+				}
+			}
+
+			helperImage[i] = (unsigned short)(acc / acck);
+
+			i++;
+		}
+	}
+
+	i = 0;
+
+	for (int y = 0; y < imageHight; y++)
+	{
+		for (int x = 0; x < imageWidth; x++)
+		{
+			acc = 0;
+			acck = 0;
+
+			for (int j = 0; j < n; j++)
+			{
+				int pos = y + j - n / 2;
+
+				if (pos >= 0 && pos < imageHight)
+				{
+					acc += helperImage[i + (j - n / 2) * imageWidth] * gausFilterKernel[j];
+					acck += gausFilterKernel[j];
+				}
+			}
+
+			image[i] = (unsigned short)(acc / acck);
+
+			i++;
+		}
+	}
+}
+
+int getX(imageBuffer combinedXy)
+{
+	return (combinedXy & 0xFF) - 0x80;
+}
+
+int getY(imageBuffer combinedXy)
+{
+	return (combinedXy / 0x100) - 0x80;
+}
+
+void sobelFilter(imageBuffer * srcImage, imageBuffer * dstImage)
+{
+	int i = 0;
+
+	for (int y = 0; y < imageHight; y++)
+	{
+		for (int x = 0; x < imageWidth; x++)
+		{
+			int dx = 0;
+			int dy = 0;
+
+			if (x > 0 && x < imageWidth - 1 && y > 0 && y < imageHight - 1)
+			{
+				for (int ix = 0; ix < 3; ix++)
+				{
+					for (int iy = 0; iy < 3; iy++)
+					{
+						int srcVal = srcImage[(x + ix - 1) + (y + iy - 1) * imageWidth];
+
+						dx += srcVal * sobelFilterKernel[ix][iy];
+						dy += srcVal * sobelFilterKernel[iy][ix];
+					}
+				}
+
+				dx /= 0x800;
+				dy /= 0x800;
+
+				if (dx > 127) dx = 127;
+				if (dx < -128) dx = -128;
+				if (dy > 127) dy = 127;
+				if (dy < -128) dy = -128;
+
+				//dstImage[i] = combineXy(dx,dy);
+				dstImage[i] = (unsigned short)(dx + 0x80 + (dy + 0x80) * 0x100);
+			}
+			else
+			{
+				dstImage[i] = 0x8080;
+			}
+
+			i++;
+		}
+	}
+}
+
+int getSlope(imageBuffer value)
+{
+	int dy = (value / 0x100) - 0x80;
+	int dx = (value & 0xFF) - 0x80;
+
+	return (dx * dx + dy * dy);
+}
+
+//srcImage must be a result from sobelFilter
+void nonMaximumSuppression(imageBuffer * srcImage, imageBuffer * dstImage, int minSlope)
+{
+	int i = 0;
+	int slope;
+
+	for (int y = 0; y < imageHight; y++)
+	{
+		for (int x = 0; x < imageWidth; x++)
+		{
+
+			if (x > 0 && x < imageWidth - 1 && y > 0 && y < imageHight - 1)
+			{
+				slope = getSlope(srcImage[i]);
+
+				if (slope < minSlope)
+				{
+					dstImage[i] = 0x8080;
+				}
+				else
+				{
+					int count = 0;
+
+					if (getSlope(srcImage[i - 1 - imageWidth]) > slope) count++;
+					if (getSlope(srcImage[i - 0 - imageWidth]) > slope) count++;
+					if (getSlope(srcImage[i + 1 - imageWidth]) > slope) count++;
+					if (getSlope(srcImage[i - 1]) > slope) count++;
+					if (getSlope(srcImage[i + 1]) > slope) count++;
+					if (getSlope(srcImage[i - 1 + imageWidth]) > slope) count++;
+					if (getSlope(srcImage[i - 0 + imageWidth]) > slope) count++;
+					if (getSlope(srcImage[i + 1 + imageWidth]) > slope) count++;
+
+					if (count > 2)
+						dstImage[i] = 0x8080;
+					else
+						dstImage[i] = srcImage[i];
+				}
+			}
+			else
+			{
+				dstImage[i] = 0x8080;
+			}
+
+			i++;
+		}
+	}
+}
+
+
+/*void drawLine(imageBuffer* dstImage, int x0, int y0, int x1, int y1)
+{
+	int x = x0;
+	int y = y0;
+	int dx = x1 - x0;
+	int dy = y1 - y0;
+	int err = dx + dy, e2; // error value e_xy
+
+	while (true)
+	{
+		dstImage[y * IMAGE_WIDTH + x] += 1;// 64 + cr;
+		if (x == x1 && y == y1) break;
+		e2 = 2 * err;
+		if (e2 > dy) { err += dy; x++; }
+		if (e2 < dx) { err += dx; y++; }
+	}
+}*/
+
+void houghTransformCircles(imageBuffer * srcImage, imageBuffer * dstImage)
+{
+	int i = 0;
+	int xslope, yslope;
+
+	for (int y = 0; y < imageHight; y++)
+	{
+		for (int x = 0; x < imageWidth; x++)
+		{
+			if (srcImage[i] != 0x8080)
+			{
+				xslope = getX(srcImage[i]);
+				yslope = getY(srcImage[i]);
+
+				if (xslope * xslope > yslope * yslope)
+				{
+					for (int xi = 0; xi < imageWidth; xi++)
+					{
+						int yi = (xi - x) * yslope / xslope + y;
+
+						if (yi > 0 && yi < imageHight)
+							dstImage[yi * imageWidth + xi]++;
+					}
+				}
+				else
+				{
+					for (int yi = 0; yi < imageHight; yi++)
+					{
+						int xi = (yi - y) * xslope / yslope + x;
+
+						if (xi > 0 && xi < imageWidth)
+							dstImage[yi * imageWidth + xi]++;
+					}
+				}
+			}
+
+			i++;
+		}
+	}
+
+}
+
+void intenerlal_houghTransformLines(imageBuffer * srcImage, imageBuffer * dstImage, int filter)
+{
+	int i = 0;
+	const int cx = imageWidth / 2;
+	const int cy = imageHight / 2;
+
+	for (int y = 0; y < imageHight; y++)
+	{
+		for (int x = 0; x < imageWidth; x++)
+		{
+			if (srcImage[i] != 0x8080)
+			{
+				int xslope = getX(srcImage[i]);
+				int yslope = getY(srcImage[i]);
+				int xslope2 = xslope * xslope;
+				int yslope2 = yslope * yslope;
+
+				if (filter == 0 || (filter == 1 && yslope2 > xslope2) || (filter == 2 && yslope2 < xslope2))
+				{
+
+					int inter = ((x - cx) * xslope + (y - cy) * yslope) * 0x100 / (xslope2 + yslope2);
+					int htx = cx + inter * xslope / 0x100;
+					int hty = cy + inter * yslope / 0x100;
+
+					if (htx > 0 && htx < imageWidth && hty > 0 && hty < imageHight && dstImage[hty * imageWidth + htx] < 0xFFFF)
+						dstImage[hty * imageWidth + htx] ++;
+
+					//std::cout << htx << " " << hty << " - " << xslope << " " << yslope << " " << ".\n";
+					//printf("%i %i %i %i\n", htx, hty, xslope, yslope);
+				}
+
+			}
+
+			i++;
+		}
+	}
+}
+
+void houghTransformLines(imageBuffer* srcImage, imageBuffer* dstImage)
+{
+	intenerlal_houghTransformLines(srcImage, dstImage, 0);
+}
+
+void houghTransformVerticalLines(imageBuffer* srcImage, imageBuffer* dstImage)
+{
+	intenerlal_houghTransformLines(srcImage, dstImage, 2);
+}
+
+void houghTransformHorizontalLines(imageBuffer* srcImage, imageBuffer* dstImage)
+{
+	intenerlal_houghTransformLines(srcImage, dstImage, 1);
+}
+
+static int usqrt4(int val) {
+	int a, b;
+
+	a = 256;   // starting point is relatively unimportant
+
+	b = val / a; a = (a + b) / 2;
+	b = val / a; a = (a + b) / 2;
+	b = val / a; a = (a + b) / 2;
+	b = val / a; a = (a + b) / 2;
+	b = val / a; a = (a + b) / 2;
+
+	return a;
+}
+
+void houghTransformMiniscus(imageBuffer * srcImage, imageBuffer * dstImage)
+{
+	int i = 0;
+
+	for (int y = 0; y < imageHight; y++)
+	{
+		for (int x = 0; x < imageWidth; x++)
+		{
+			if (srcImage[i] != 0)
+			{
+				int xslope = getX(srcImage[i]);
+				int yslope = getY(srcImage[i]);
+
+				if (xslope != 0)
+				{
+					int preCalc = 0x1000 * yslope / xslope;
+
+
+					for (int htx = 0; htx < imageWidth; htx++)
+					{
+						int dx = htx - x;
+						//int dy = dx * yslope / xslope;
+						int dy = dx * preCalc / 0x1000;
+
+						if (dx != 0)
+						{
+							int r = usqrt4(dx * dx + dy * dy);
+							//int r = sqrt(dx * dx + dy * dy);
+
+							int hty = y + dy - r;
+
+							if (hty >= 0 && hty < imageHight)
+								dstImage[hty * imageWidth + htx] ++;
+						}
+
+					}
+
+				}
+			}
+
+			i++;
+		}
+	}
+}
+
+void findMaxima(imageBuffer* srcImage, imageBuffer* dstImage, int threshold, int minDistance)
+{
+	int ws2 = minDistance / 2;
+	int maxVal;
+	int maxInd;
+
+	for (int i = 0; i < imageBufferSize; i++)
+	{
+		dstImage[i] = srcImage[i];
+	}
+
+	for (int y = ws2; y < imageHight; y += ws2)
+	{
+		for (int x = ws2; x < imageWidth; x += ws2)
+		{
+			maxVal = threshold;
+			maxInd = -1;
+
+			for (int ix = -ws2; ix < ws2; ix++)
+			{
+				for (int iy = -ws2; iy < ws2; iy++)
+				{
+					int i = (x + ix) + (y + iy) * imageWidth;
+
+					if (srcImage[i] > maxVal)
+					{
+						maxInd = i;
+						maxVal = srcImage[i];
+					}
+				}
+			}
+
+			for (int ix = -ws2; ix < ws2; ix++)
+			{
+				for (int iy = -ws2; iy < ws2; iy++)
+				{
+					int i = (x + ix) + (y + iy) * imageWidth;
+					if (i != maxInd)
+						dstImage[i] = 0;
+				}
+			}
+
+
+		}
+	}
+}
+
+void bubbleSort(struct pixel_list* array, int length)
+{
+	int i, j;
+	struct pixel_list tmp;
+
+	for (i = 1; i < length; i++)
+	{
+		for (j = 0; j < length - i; j++)
+		{
+			if (array[j].value[4] < array[j + 1].value[4])
+			{
+				tmp = array[j];
+				array[j] = array[j + 1];
+				array[j + 1] = tmp;
+			}
+		}
+	}
+}
+
+int getPixelList(imageBuffer* primImage, imageBuffer* secImage, struct pixel_list* list, int listLenght)
+{
+	int i = 0;
+	int j = 0;
+
+	for (int y = 1; y < imageHight - 1; y++)
+	{
+		for (int x = 1; x < imageWidth - 1; x++)
+		{
+			i = x + y * imageWidth;
+
+			if (primImage[i] != 0 && j < listLenght)
+			{
+				list[j].value[0] = secImage[x + (y - 1) * imageWidth - 1];
+				list[j].value[1] = secImage[x + (y - 1) * imageWidth];
+				list[j].value[2] = secImage[x + (y - 1) * imageWidth + 1];
+
+				list[j].value[3] = secImage[i - 1];
+				list[j].value[4] = secImage[i];
+				list[j].value[5] = secImage[i + 1];
+
+				list[j].value[6] = secImage[x + (y + 1) * imageWidth - 1];
+				list[j].value[7] = secImage[x + (y + 1) * imageWidth];
+				list[j].value[8] = secImage[x + (y + 1) * imageWidth + 1];
+
+				list[j].x = x;
+				list[j].y = y;
+				j++;
+			}
+			
+			i++;
+		}
+	}
+
+	bubbleSort(list, listLenght);
+
+	return j;
+}
+
+void convertToSlope(imageBuffer* srcImage, imageBuffer* dstImage)
+{
+	for (int i = 0; i < imageBufferSize; i++)
+	{
+		dstImage[i] = (unsigned short)getSlope(srcImage[i]);
+	}
+}
+
+void binarize(imageBuffer * srcImage, imageBuffer * dstImage, int threshold)
+{
+	for (int i = 0; i < imageBufferSize; i++)
+	{
+		dstImage[i] = (srcImage[i] > threshold) ? 0xFFFF : 0;
+	}
+}
+
+void clearBufferArea(imageBuffer * dstImage, int startLine, int endLine)
+{
+	for (int i = 0; i < imageBufferSize; i++)
+	{
+		if (i / imageWidth >= startLine && i / imageWidth < endLine)
+			dstImage[i] = 0;
+	}
+}
+
+void clearBuffer(imageBuffer* dstImage)
+{
+	clearBufferArea(dstImage, 0, imageHight);
+}
diff --git a/tests/src/imageRec.h b/tests/src/imageRec.h
new file mode 100644
index 0000000..3159a1a
--- /dev/null
+++ b/tests/src/imageRec.h
@@ -0,0 +1,43 @@
+
+#define RADIUS_VAL 500 
+
+typedef unsigned short imageBuffer;
+typedef int bool;
+
+struct pixel_list {
+	imageBuffer value[9];
+	int x;
+	int y;
+};
+
+int setImageSize(int width, int hight);
+
+void normalizeImage(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void gausFilter(imageBuffer* image, imageBuffer* helperImage);
+
+void sobelFilter(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void nonMaximumSuppression(imageBuffer* srcImage, imageBuffer* dstImage, int minSlope);
+
+void houghTransformCircles(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void houghTransformLines(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void houghTransformVerticalLines(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void houghTransformHorizontalLines(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void houghTransformMiniscus(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void findMaxima(imageBuffer* srcImage, imageBuffer* dstImage, int threshold, int minDistance);
+
+int getPixelList(imageBuffer* primImage, imageBuffer* secImage, struct pixel_list* list, int listLenght);
+
+void convertToSlope(imageBuffer* srcImage, imageBuffer* dstImage);
+
+void binarize(imageBuffer* srcImage, imageBuffer* dstImage, int threshold);
+
+void clearBufferArea(imageBuffer* dstImage, int startLine, int endLine);
+
+void clearBuffer(imageBuffer* dstImage);
\ No newline at end of file