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basicfilter.cpp
executable file
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basicfilter.cpp
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#include "basicfilter.h"
Mat old(Mat &srcImg){
Mat src;
srcImg.copyTo(src);
int width = src.cols;
int heigh = src.rows;
for (int y = 0; y < heigh; y++)
{
uchar* srcImage = src.ptr<uchar>(y);
for (int x = 0; x < width; x++)
{
double oldB = srcImage[3*x];
double oldG = srcImage[3*x+1];
double oldR = srcImage[3*x+2];
double newB = 0.272*oldR + 0.534*oldG + 0.131*oldB;
double newG = 0.349*oldR + 0.686*oldG + 0.168*oldB;
double newR = 0.393*oldR + 0.769*oldG + 0.189*oldB;
if(newB < 0) {
newB = 0;
}
if(newB > 255){
newB = 255;
}
if(newG < 0){
newG = 0;
}
if(newG > 255){
newG = 255;
}
if(newR < 0){
newR = 0;
}
if(newR > 255){
newR = 255;
}
srcImage[3*x] = static_cast<uchar>(newB);
srcImage[3*x+1] = static_cast<uchar>(newG);
srcImage[3*x+2] = static_cast<uchar>(newR);
}
}
return src;
}
Mat magic(Mat &srcImg){
Mat src;
srcImg.copyTo(src);
int width = src.cols;
int heigh = src.rows;
for (int y = 0;y < heigh;y++)
{
uchar* srcImage = src.ptr<uchar>(y);
for (int x = 0; x < width; x++)
{
float oldB = srcImage[3*x];
float oldG = srcImage[3*x+1];
float oldR = srcImage[3*x+2];
float newB = oldB*255 / (oldG+oldR+1);
float newG = oldG*255 / (oldB+oldR+1);
float newR = oldR*255 / (oldG+oldR+1);
if(newR <= 0) {
newR = 0;
}
else if (newR > 255){
newR = 255;
}
if(newG <= 0) {
newG = 0;
}
else if (newG > 255) {
newG = 255;
}
if(newB <= 0) {
newB = 0;
}
else if (newB > 255) {
newB = 255;
}
srcImage[3*x] = static_cast<uchar>(newB);
srcImage[3*x+1] = static_cast<uchar>(newG);
srcImage[3*x+2] = static_cast<uchar>(newR);
}
}
return src;
}
Mat silence(Mat &srcImg){
Mat src;
srcImg.copyTo(src);
int width=src.cols;
int heigh=src.rows;
for (int y = 0; y < heigh; y++){
uchar* srcImage=src.ptr<uchar>(y);
for (int x = 0; x < width; x++){
float oldB=srcImage[3*x];
float oldG=srcImage[3*x+1];
float oldR=srcImage[3*x+2];
float newB = (oldB-oldG-oldR)*3/2;
float newG = (oldG-oldB-oldR)*3/2;
float newR = (oldR-oldG-oldB)*3/2;
if(newR < 0) {
newR = -newR;
}
else if (newR > 255){
newR = 255;
}
if(newG < 0) {
newG = -newG;
}
else if (newG > 255) {
newG = 255;
}
if(newB <0) {
newB = -newB;
}
else if (newB > 255) {
newB = 255;
}
srcImage[3*x] = static_cast<uchar>(newB);
srcImage[3*x+1] = static_cast<uchar>(newG);
srcImage[3*x+2] = static_cast<uchar>(newR);
}
}
return src;
}
Mat exposure(Mat &srcImg){
Mat src;
srcImg.copyTo(src);
int width=src.cols;
int heigh=src.rows;
for(int y = 0; y < heigh;y++){
uchar* srcImage = src.ptr<uchar>(y);
for(int x = 0; x< width; x++){
float newB, newG, newR;
float oldB=srcImage[3*x];
float oldG=srcImage[3*x+1];
float oldR=srcImage[3*x+2];
if (oldB < 0){
newB = 0;
}
else if (oldB < 128){
newB = 255 - oldB;
}
else if (oldB < 255){
newB = oldB;
}
else {
newB = 255;
}
if (oldG < 0){
newG = 0;
}
else if (oldG < 128){
newG = 255 - oldG;
}
else if (oldG < 255){
newG = oldG;
}
else {
newG = 255;
}
if (oldR < 0){
newR = 0;
}
else if (oldR < 128){
newR = 255 - oldR;
}
else if (oldR < 255){
newR = oldR;
}
else {
newR = 255;
}
srcImage[3*x] = static_cast<uchar>(newB);
srcImage[3*x+1] = static_cast<uchar>(newG);
srcImage[3*x+2] = static_cast<uchar>(newR);
}
}
return src;
}
Mat comic(Mat &srcImg){
Mat src;
srcImg.copyTo(src);
int width=src.cols;
int heigh=src.rows;
for (int y=0; y<heigh; y++)
{
uchar* srcImage = src.ptr<uchar>(y);
for (int x=0; x<width; x++)
{
float oldB=srcImage[3*x];
float oldG=srcImage[3*x+1];
float oldR=srcImage[3*x+2];
float newB=abs(oldB-oldG+oldB+oldR)*oldG/256;
float newG=abs(oldB-oldG+oldB+oldR)*oldR/256;
float newR=abs(oldG-oldB+oldG+oldR)*oldR/256;
if(newB < 0){
newB = 0;
}
if(newB > 255){
newB = 255;
}
if(newG < 0){
newG = 0;
}
if(newG > 255){
newG = 255;
}
if(newR < 0){
newR = 0;
}
if(newR > 255){
newR = 255;
}
srcImage[3*x] = static_cast<uchar>(newB);
srcImage[3*x+1] = static_cast<uchar>(newG);
srcImage[3*x+2] = static_cast<uchar>(newR);
}
}
// Convert it into gray image
Mat gray;
cvtColor(src,gray,COLOR_BGR2GRAY);
normalize(gray,gray,255,0,NORM_MINMAX);
return gray;
}