diff --git a/ImageUtils.cpp b/ImageUtils.cpp
index 1906f4b..823247b 100644
--- a/ImageUtils.cpp
+++ b/ImageUtils.cpp
@@ -180,6 +180,80 @@ void ImageUtils::pasteImage(T* sourceImgDataPtr, const Dim& sourceDim, long star
 	}
 }
 
+template <typename T>
+std::pair<T*, Dim> ImageUtils::maxPool(T* sourceImgDataPtr, const Dim& sourceDim, const long poolSize)
+{
+	Dim targetDim = { sourceDim.width/poolSize, sourceDim.height/poolSize };
+	Dim poolDim = { poolSize, poolSize };
+
+	T* t = new T[targetDim.getLength()];
+
+	for (auto y = 0; y < targetDim.height; y++)
+	{
+		for (auto x = 0; x < targetDim.width; x++)
+		{
+			T* clip = subImage(sourceImgDataPtr, sourceDim, x * poolSize, y * poolSize, poolDim);
+			T* tPixel = getPixelPtr(t, targetDim, x, y);
+
+			auto max = 0.0;
+
+			eachPixel<T>(clip, poolDim, [&](T* rgbArray, long, long)
+			{
+				auto sum = rgbArray[0] + rgbArray[1] + rgbArray[2];
+				if (sum > max)
+				{
+					max = sum;
+					tPixel[0] = rgbArray[0];
+					tPixel[1] = rgbArray[1];
+					tPixel[2] = rgbArray[2];
+				}
+			});
+
+			delete[] clip;
+		}
+	}
+
+	return { t, targetDim };
+}
+
+template <typename T>
+std::pair<T*, Dim> ImageUtils::meanPool(T* sourceImgDataPtr, const Dim& sourceDim, const long poolSize)
+{
+	Dim targetDim = { sourceDim.width / poolSize, sourceDim.height / poolSize };
+	Dim poolDim = { poolSize, poolSize };
+	const double numPoolPixels = poolDim.width * poolDim.height;
+
+	T* t = new T[targetDim.getLength()];
+
+	for (auto y = 0; y < targetDim.height; y++)
+	{
+		for (auto x = 0; x < targetDim.width; x++)
+		{
+			T* clip = subImage(sourceImgDataPtr, sourceDim, x * poolSize, y * poolSize, poolDim);
+			T* tPixel = getPixelPtr(t, targetDim, x, y);
+
+			double rSum = 0;
+			double gSum = 0;
+			double bSum = 0;
+
+			eachPixel<T>(clip, poolDim, [&](T* rgbArray, long, long)
+			{
+				rSum += rgbArray[0];
+				gSum += rgbArray[1];
+				bSum += rgbArray[2];
+			});
+
+			tPixel[0] = static_cast<T>(rSum / numPoolPixels);
+			tPixel[1] = static_cast<T>(gSum / numPoolPixels);
+			tPixel[2] = static_cast<T>(bSum / numPoolPixels);
+
+			delete[] clip;
+		}
+	}
+
+	return { t, targetDim };
+}
+
 template <typename T, typename U>
 U* ImageUtils::toNewType(T* fromImgDataPtr, const Dim& dim)
 {
diff --git a/ImageUtils.h b/ImageUtils.h
index 5bc3e2c..f9e058b 100644
--- a/ImageUtils.h
+++ b/ImageUtils.h
@@ -139,8 +139,24 @@ class ImageUtils
 	template <typename T>
 	static T* subImage(T* sourceImgDataPtr, const Dim& sourceDim, long startX, long startY, const Dim& targetDim);
 
+	/**
+	 * 
+	 * @tparam T type of image data array.
+	 * @param sourceImgDataPtr pointer to the source image data array.
+	 * @param sourceDim dimension of the source image.
+	 * @param startX x-location of the top left coordinate of the source of the sub image in the source image.
+	 * @param startY y-location of the top left coordinate of the source of the sub image in the source image.
+	 * @param pasteImgDataPtr pointer to the smaller image data array.
+	 * @param pasteDim dimension of the smaller image.
+	 */
 	template <typename T>
 	static void pasteImage(T* sourceImgDataPtr, const Dim& sourceDim, long startX, long startY, T* pasteImgDataPtr, const Dim& pasteDim);
+
+	template <typename T>
+	static std::pair<T*, Dim> maxPool(T* sourceImgDataPtr, const Dim& sourceDim, long poolSize);
+
+	template <typename T>
+	static std::pair<T*, Dim> meanPool(T* sourceImgDataPtr, const Dim& sourceDim, long poolSize);
 };
 
 //Template prototype functions
@@ -166,6 +182,10 @@ template unsigned char* ImageUtils::subImage(unsigned char*, const Dim&, long, l
 template double* ImageUtils::subImage(double*, const Dim&, long, long, const Dim&);
 template void ImageUtils::pasteImage(unsigned char*, const Dim&, long, long, unsigned char*, const Dim&);
 template void ImageUtils::pasteImage(double*, const Dim&, long, long, double*, const Dim&);
+template std::pair<double*, Dim> ImageUtils::maxPool(double* sourceImgDataPtr, const Dim& sourceDim, long poolSize);
+template std::pair<unsigned char*, Dim> ImageUtils::maxPool(unsigned char* sourceImgDataPtr, const Dim& sourceDim, long poolSize);
+template std::pair<double*, Dim> ImageUtils::meanPool(double* sourceImgDataPtr, const Dim& sourceDim, long poolSize);
+template std::pair<unsigned char*, Dim> ImageUtils::meanPool(unsigned char* sourceImgDataPtr, const Dim& sourceDim, long poolSize);
 
 template <typename T>
 struct ImageWrapper
@@ -227,6 +247,22 @@ struct ImageWrapper
 	{
 		ImageUtils::pasteImage(dataPtr, dim, x, y, other.dataPtr, other.dim);
 	}
+	ImageWrapper maxPool(long poolSize)
+	{
+		auto[pooledImage, pooledDim] = ImageUtils::maxPool(dataPtr, dim, poolSize);
+		return {
+			pooledImage,
+			pooledDim
+		};
+	}
+	ImageWrapper meanPool(long poolSize)
+	{
+		auto[pooledImage, pooledDim] = ImageUtils::meanPool(dataPtr, dim, poolSize);
+		return {
+			pooledImage,
+			pooledDim
+		};
+	}
 	ImageWrapper(T* imgDataPtr, const Dim& dim): dataPtr(imgDataPtr), dim(dim) {}
 	ImageWrapper(const ImageWrapper& other)
 	{
diff --git a/MosaicBuilder.cpp b/MosaicBuilder.cpp
index 5d2719b..f6985c0 100644
--- a/MosaicBuilder.cpp
+++ b/MosaicBuilder.cpp
@@ -147,7 +147,9 @@ ImageWrapper<unsigned char> MosaicBuilder::makeGradientImage(const ImageWrapper<
 		rgbArray[2] = 255;
 	});
 
-	return sobelY;
+	auto gradient = sobelY.maxPool(5);
+
+	return gradient;
 }
 
 ImageWrapper<unsigned char> MosaicBuilder::makeColorImage(const ImageWrapper<unsigned char>& imgWrapper)
@@ -175,8 +177,9 @@ ImageWrapper<unsigned char> MosaicBuilder::makeColorImage(const ImageWrapper<uns
 	auto colorImg = imgWrapper;
 
 	colorImg.convolve(gaussianKernel, kernelSize);
+	auto meanColor = colorImg.meanPool(6);
 
-	return colorImg;
+	return meanColor;
 }
 
 bool MosaicBuilder::loadAllTiles()
@@ -203,21 +206,21 @@ bool MosaicBuilder::loadAllTiles()
 			if (imagePool.count(name) == 0)
 			{
 				//Load and add images to pool.
-				int width;
-				int height;
+				auto width = 0;
+				auto height = 0;
 
 				imagePool[name] = ImageSet{
 					new ImageWrapper<unsigned char>{
 						readBMP(entry.path().string().c_str(), width, height),
-						TILE_DIM
+						{ width, height }
 					},
 					new ImageWrapper<unsigned char>{
-						readBMP(entry.path().string().c_str(), width, height),
-						TILE_DIM
+						readBMP(resultGradientPath.string().c_str(), width, height),
+						{ width, height }
 					},
 					new ImageWrapper<unsigned char>{
-						readBMP(entry.path().string().c_str(), width, height),
-						TILE_DIM
+						readBMP(resultColorPath.string().c_str(), width, height),
+						{ width, height }
 					}
 				};
 			}
@@ -264,7 +267,9 @@ void MosaicBuilder::saveGradientImage(ImageWrapper<unsigned char>& imgWrapper, c
 			imgWrapper.dataPtr = readBMP(imgPath.string().c_str(), width, height);
 		}
 
-		writeBMP(resultGradientPath.string().c_str(), TILE_DIM.width, TILE_DIM.height, makeGradientImage(imgWrapper).dataPtr);
+		const auto gradient = makeGradientImage(imgWrapper);
+
+		writeBMP(resultGradientPath.string().c_str(), gradient.dim.width, gradient.dim.height, gradient.dataPtr);
 	}
 }
 
@@ -282,6 +287,8 @@ void MosaicBuilder::saveColorImage(ImageWrapper<unsigned char>& imgWrapper, cons
 			imgWrapper.dataPtr = readBMP(imgPath.string().c_str(), width, height);
 		}
 
-		writeBMP(resultColorPath.string().c_str(), TILE_DIM.width, TILE_DIM.height, makeColorImage(imgWrapper).dataPtr);
+		const auto color = makeColorImage(imgWrapper);
+
+		writeBMP(resultColorPath.string().c_str(), color.dim.width, color.dim.height, color.dataPtr);
 	}
 }
diff --git a/MosaicImage.cpp b/MosaicImage.cpp
index 76a32b4..68c060c 100644
--- a/MosaicImage.cpp
+++ b/MosaicImage.cpp
@@ -45,14 +45,14 @@ void MosaicImage::applySubstitutions()
 
 			auto limit = static_cast<int>(MosaicBuilder::tileLimitSliderPtr->value());
 
-			for (auto& pair : MosaicBuilder::imagePool)
+			for (auto& [key, set] : MosaicBuilder::imagePool)
 			{
 				if (limit == 0) break;
-				const auto score = MosaicBuilder::calculateScores(sourceTile, pair.second);
+				const auto score = MosaicBuilder::calculateScores(sourceTile, set);
 				if (score < bestScore)
 				{
 					bestScore = score;
-					bestImagePtr = pair.second.original;
+					bestImagePtr = set.original;
 				}
 				limit--;
 			}