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-rw-r--r--src/process/im_kernel.cpp293
1 files changed, 293 insertions, 0 deletions
diff --git a/src/process/im_kernel.cpp b/src/process/im_kernel.cpp
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+++ b/src/process/im_kernel.cpp
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+/** \file
+ * \brief Kernel Generators
+ * Creates several known kernels
+ *
+ * See Copyright Notice in im_lib.h
+ * $Id: im_kernel.cpp,v 1.1 2008/10/17 06:16:33 scuri Exp $
+ */
+
+#include "im.h"
+#include "im_util.h"
+#include "im_image.h"
+#include "im_kernel.h"
+
+#include <stdlib.h>
+#include <memory.h>
+#include <assert.h>
+#include <math.h>
+
+
+static imImage* iKernelCreate(int w, int h, int* data, char* desc)
+{
+ imImage* kernel = imImageCreate(w, h, IM_GRAY, IM_INT);
+ int* kernel_data = (int*)kernel->data[0];
+ memcpy(kernel_data, data, kernel->size);
+ imImageSetAttribute(kernel, "Description", IM_BYTE, -1, (void*)desc);
+ return kernel;
+}
+
+imImage* imKernelSobel(void)
+{
+ int kernel_data[3*3] = {
+ -1, -2, -1,
+ 0, 0, 0,
+ 1, 2, 1
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Sobel");
+}
+
+imImage* imKernelPrewitt(void)
+{
+ int kernel_data[3*3] = {
+ -1, -1, -1,
+ 0, 0, 0,
+ 1, 1, 1
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Prewitt");
+}
+
+imImage* imKernelKirsh(void)
+{
+ int kernel_data[3*3] = {
+ -3, -3, -3,
+ -3, 0, -3,
+ 5, 5, 5
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Kirsh");
+}
+
+imImage* imKernelLaplacian4(void)
+{
+ int kernel_data[3*3] = {
+ 0, -1, 0,
+ -1, 4, -1,
+ 0, -1, 0
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Laplacian4");
+}
+
+imImage* imKernelLaplacian8(void)
+{
+ int kernel_data[3*3] = {
+ -1, -1, -1,
+ -1, 8, -1,
+ -1, -1, -1
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Laplacian8");
+}
+
+imImage* imKernelLaplacian5x5(void)
+{
+ int kernel_data[5*5] = {
+ 0, -1, -1, -1, 0,
+ -1, 0, 1, 0, -1,
+ -1, 1, 8, 1, -1,
+ -1, 0, 1, 0, -1,
+ 0, -1, -1, -1, 0
+ };
+
+ return iKernelCreate(5, 5, kernel_data, "Laplacian5x5");
+}
+
+imImage* imKernelLaplacian7x7(void)
+{
+ int kernel_data[7*7] = {
+ -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, 48, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1
+ };
+
+ return iKernelCreate(7, 7, kernel_data, "Laplacian7x7");
+}
+
+imImage* imKernelGradian3x3(void)
+{
+ int kernel_data[3*3] = {
+ 0, -1, 0,
+ 0, 1, 0,
+ 0, 0, 0
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Gradian3x3");
+}
+
+imImage* imKernelGradian7x7(void)
+{
+ int kernel_data[7*7] = {
+ 0, -1, -1, 0, 1, 1, 0,
+ -1, -2, -2, 0, 2, 2, 1,
+ -1, -2, -3, 0, 3, 2, 1,
+ -1, -2, -3, 0, 3, 2, 1,
+ -1, -2, -3, 0, 3, 2, 1,
+ -1, -2, -2, 0, 2, 2, 1,
+ 0, -1, -1, 0, 1, 1, 0
+ };
+
+ return iKernelCreate(7, 7, kernel_data, "Gradian7x7");
+}
+
+imImage* imKernelSculpt(void)
+{
+ int kernel_data[3*3] = {
+ 0, 0, 1,
+ 0, 0, 0,
+ -1, 0, 0
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Sculpt");
+}
+
+imImage* imKernelMean3x3(void)
+{
+ int kernel_data[3*3] = {
+ 1, 1, 1,
+ 1, 1, 1,
+ 1, 1, 1
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Mean3x3");
+}
+
+imImage* imKernelMean5x5(void)
+{
+ int kernel_data[5*5] = {
+ 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1
+ };
+
+ return iKernelCreate(5, 5, kernel_data, "Mean5x5");
+}
+
+imImage* imKernelCircularMean5x5(void)
+{
+ int kernel_data[5*5] = {
+ 0, 1, 1, 1, 0,
+ 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1,
+ 0, 1, 1, 1, 0
+ };
+
+ return iKernelCreate(5, 5, kernel_data, "CircularMean5x5");
+}
+
+imImage* imKernelMean7x7(void)
+{
+ int kernel_data[7*7] = {
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1
+ };
+
+ return iKernelCreate(7, 7, kernel_data, "Mean7x7");
+}
+
+imImage* imKernelCircularMean7x7(void)
+{
+ int kernel_data[7*7] = {
+ 0, 0, 1, 1, 1, 0, 0,
+ 0, 1, 1, 1, 1, 1, 0,
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1,
+ 0, 1, 1, 1, 1, 1, 0,
+ 0, 0, 1, 1, 1, 0, 0
+ };
+
+ return iKernelCreate(7, 7, kernel_data, "CircularMean7x7");
+}
+
+imImage* imKernelGaussian3x3(void)
+{
+ int kernel_data[3*3] = {
+ 1, 2, 1,
+ 2, 4, 2,
+ 1, 2, 1
+ };
+
+ return iKernelCreate(3, 3, kernel_data, "Gaussian3x3");
+}
+
+imImage* imKernelGaussian5x5(void)
+{
+ int kernel_data[5*5] = {
+ 1, 4, 6, 4, 1,
+ 4, 16, 24, 16, 4,
+ 6, 24, 36, 24, 6,
+ 4, 16, 24, 16, 4,
+ 1, 4, 6, 4, 1
+ };
+
+ return iKernelCreate(5, 5, kernel_data, "Gaussian5x5");
+}
+
+imImage* imKernelBarlett5x5(void)
+{
+ int kernel_data[5*5] = {
+ 1, 2, 3, 2, 1,
+ 2, 4, 6, 4, 2,
+ 3, 6, 9, 6, 3,
+ 2, 4, 6, 4, 2,
+ 1, 2, 3, 2, 1
+ };
+
+ return iKernelCreate(5, 5, kernel_data, "Barlett5x5");
+}
+
+imImage* imKernelTopHat5x5(void)
+{
+ int kernel_data[5*5] = {
+ 0, -1, -1, -1, 0,
+ -1, -1, 3, -1, -1,
+ -1, 3, 4, 3, -1,
+ -1, -1, 3, -1, -1,
+ 0, -1, -1, -1, 0
+ };
+
+ return iKernelCreate(5, 5, kernel_data, "TopHat5x5");
+}
+
+imImage* imKernelTopHat7x7(void)
+{
+ int kernel_data[7*7] = {
+ 0, 0, -1, -1, -1, 0, 0,
+ 0, -1, -1, -1, -1, -1, 0,
+ -1, -1, 3, 3, 3, -1, -1,
+ -1, -1, 3, 4, 3, -1, -1,
+ -1, -1, 3, 3, 3, -1, -1,
+ 0, -1, -1, -1, -1, -1, 0,
+ 0, 0, -1, -1, -1, 0, 0
+ };
+
+ return iKernelCreate(7, 7, kernel_data, "TopHat7x7");
+}
+
+imImage* imKernelEnhance(void)
+{
+ int kernel_data[5*5] = {
+ 0, -1, -2, -1, 0,
+ -1, -4, 0, -4, -1,
+ -2, 0, 40, 0, -2,
+ -1, -4, 0, -4, -1,
+ 0, -1, -2, -1, 0
+ };
+
+ return iKernelCreate(5, 5, kernel_data, "Enhance");
+}
+
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