cv::Mat use for images

1 files changed, 265 insertions, 0 deletions

diff --git a/rotord/cvimage.h b/rotord/cvimage.h
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index 0000000..7588673
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+++ b/rotord/cvimage.h
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+#include <math.h>
+#include <cv.h>
+
+using namespace std;
+
+//converting to use a cv image...
+//cv::Mat supports most of what we want here
+//need to think 
+//http://answers.opencv.org/question/8202/using-external-image-data-in-a-cvmat/
+
+//all access to the image is presently through a pointer to the data
+//cv::Mat supports this
+
+//how will copying work?
+//Rotor::Image will contain a cv::Mat object which may own its data or inherit it
+//cv::Mat should take care of reference counting
+
+//can cv::Mat 
+
+namespace Rotor {
+	class pixeltables{
+		//handy pixel arithmetic lookup tables as nested arrays
+		//so - pixels.add[0x78][0x66]; will give the precalculated result of adding with saturation
+		// pixels.mono_weights[0][0x100]; will give the red component to convert to mono
+		public:
+			pixeltables(){
+				add=new uint8_t*[256];
+				multiply=new uint8_t*[256];
+				for (int i=0;i<256;i++){
+					add[i]=new uint8_t[256];
+					multiply[i]=new uint8_t[256];
+					for (int j=0;j<256;j++){
+						add[i][j]=(uint8_t)min(i+j,0xFF);
+						multiply[i][j]=(uint8_t)((((float)i)/255.0f)*(((float)j)/255.0f)*255.0f);
+					}
+				}
+				mono_weights=new uint8_t*[3];
+				float weights[3]={0.2989, 0.5870, 0.1140};
+				for (int i=0;i<3;i++) {
+					mono_weights[i]=new uint8_t[256];
+					for (int j=0;j<256;j++){
+						mono_weights[i][j]=(uint8_t)(((float)j)*weights[i]);
+					}
+				}
+			}
+			virtual ~pixeltables(){
+				for (int i=0;i<256;i++){
+					delete[] add[i];
+					delete[] multiply[i];
+				}
+				delete[] add;
+				delete[] multiply;
+				for (int i=0;i<3;i++) {
+					delete[] mono_weights[i];
+				}
+				delete[] mono_weights;
+			}
+			uint8_t **add;
+			uint8_t **multiply;
+			uint8_t **mono_weights;
+	};
+	static pixeltables pixels;
+	class Image{
+		public:
+			Image(){
+				zero();
+			};
+			Image(int _w,int _h){
+				zero();
+				setup(_w,_h);
+			};
+			~Image() {
+				free();
+			};
+			void free(){
+				if (RGBdata&&ownsRGBdata) delete[] RGBdata;
+				if (Adata&&ownsAdata) delete[] Adata;
+				if (Zdata&&ownsZdata) delete[] Zdata;
+				zero();
+			}
+			void zero(){
+				RGBdata=nullptr;
+				Adata=nullptr;
+				Zdata=nullptr;
+				w=0;
+				h=0;
+				ownsRGBdata=ownsAdata=ownsZdata=false;
+			}
+			bool setup(int _w,int _h){ //set up with internal data
+				rgb.create(_w,_h,CV_8UC3);
+				RGBdata=rgb.data; //can move to use the bare pointer eventually
+				ownsRGBdata=false; //will not be necessary
+				w=_w;
+				h=_h;
+				return true;
+				/*
+				if (w!=_w||h!=_h||!ownsRGBdata||!ownsAdata||!ownsZdata){
+					free();
+					w=_w;
+					h=_h;
+					RGBdata=new uint8_t[w*h*3];
+					Adata=new uint8_t[w*h];
+					Zdata=new uint16_t[w*h];
+					ownsRGBdata=ownsAdata=ownsZdata=true;
+					return true;
+				}
+				else return false;
+				*/
+			}
+			bool setup_fromRGB(int _w,int _h,uint8_t *pRGBdata){ 
+			//here the data belongs to libavcodec or other
+			//could move to using cv::Mat there also and just passing cv:Mat over
+			 	rgb=cv::Mat(_w,_h,CV_8UC3,pRGBdata);
+			 	RGBdata=rgb.data; //can move to use the bare pointer eventually
+				ownsRGBdata=false; //will not be necessary
+				w=_w;
+				h=_h;
+				return true;
+				/*
+				if (w!=_w||h!=_h||ownsRGBdata||!ownsAdata||!ownsZdata){
+					free();
+					w=_w;
+					h=_h;
+					RGBdata=pRGBdata;
+					Adata=new uint8_t[w*h];
+					Zdata=new uint16_t[w*h];
+					ownsRGBdata=false;
+					ownsAdata=ownsZdata=true;
+					return true;
+				}
+				return false;
+				*/
+			}
+			bool setup_fromMat(cv::Mat& othermat){ 
+			//here the mat belongs to another Image object
+			 	rgb=cv::Mat(othermat);
+			 	RGBdata=rgb.data; //can move to use the bare pointer eventually
+				ownsRGBdata=false; //will not be necessary
+				w=rgb.rows;
+				h=rgb.cols;
+				return true;
+			}
+			Image* clone(){
+				Image *t=new Image();
+				t->rgb=rgb.clone();
+				t->w=w;
+				t->h=h;
+				t->RGBdata=t->rgb.data; //can move to use the bare pointer eventually
+				t->ownsRGBdata=false; //will not be necessary
+				/*
+				for (int i=0;i<w*h*3;i++) {
+					t->RGBdata[i]=RGBdata[i];
+				}
+				*/
+				return t;
+			}
+			//believe these still work, don't know if these optimisations are better than opencvs..
+			Image & operator+=(const Image &other) {
+				if (other.w!=w||other.h!=h) {
+					cerr<<"Rotor: cannot add images with different sizes! (wanted "<<w<<"x"<<h<<", got "<<other.w<<"x"<<other.h<<")"<<endl;
+				}
+				else {
+					for (int i=0;i<w*h*3;i++){
+						//calculate with tables
+						RGBdata[i]=pixels.add[RGBdata[i]][other.RGBdata[i]];
+					}
+				}
+				return *this;
+			}
+			Image & operator*=(const Image &other) {
+				if (other.w!=w||other.h!=h) {
+					cerr<<"Rotor: cannot multiply images with different sizes! (wanted "<<w<<"x"<<h<<", got "<<other.w<<"x"<<other.h<<")"<<endl;
+				}
+				else {
+					for (int i=0;i<w*h*3;i++){
+						//calculate with tables
+						RGBdata[i]=pixels.multiply[RGBdata[i]][other.RGBdata[i]];
+					}
+				}
+				return *this;
+			}
+			Image & add_wrap(const Image &other) {
+				if (other.w!=w||other.h!=h) {
+					cerr<<"Rotor: cannot add images with different sizes! (wanted "<<w<<"x"<<h<<", got "<<other.w<<"x"<<other.h<<")"<<endl;
+				}
+				else {
+					for (int i=0;i<w*h*3;i++){
+						//creates rainbow overload
+						RGBdata[i]=(unsigned char)(((int)other.RGBdata[i]+(int)RGBdata[i]));
+					}
+				}
+				return *this;
+			}
+			//scalar operations allocate a new image.
+			//maybe this could not be the case if the data is owned by this image?
+			//need to look into auto_ptr
+			Image & operator*=(const float &amount) {
+				uint8_t *LUT=new uint8_t[256];
+				for (int i=0;i<256;i++) {
+					LUT[i]=(uint8_t)min(0xFF,max(0,(int)(i*amount)));
+				}
+				for (int i=0;i<w*h*3;i++){
+					//calculate with table
+					RGBdata[i]=LUT[RGBdata[i]];
+				}
+				delete[] LUT;
+				return *this;
+			}
+			Image * operator*(const float &amount) {
+				Image *other=new Image(w,h);
+				uint8_t *LUT=new uint8_t[256];
+				for (int i=0;i<256;i++) {
+					LUT[i]=(uint8_t)min(0xFF,max(0,(int)(i*amount)));
+				}
+				for (int i=0;i<w*h*3;i++){
+					other->RGBdata[i]=LUT[RGBdata[i]];
+				}
+				delete[] LUT;
+				return other;
+			}
+			Image * operator+(const float &amount) {
+				Image *other=new Image(w,h);
+				uint8_t *LUT=new uint8_t[256];
+				for (int i=0;i<256;i++) {
+					LUT[i]=(uint8_t)min(0xFF,max(0,(int)(i+(amount*255.0f))));
+				}
+				for (int i=0;i<w*h*3;i++){
+					other->RGBdata[i]=LUT[RGBdata[i]];
+				}
+				delete[] LUT;
+				return other;
+			}
+			Image * operator-(const float &amount) {
+				Image *other=new Image(w,h);
+				uint8_t *LUT=new uint8_t[256];
+				for (int i=0;i<256;i++) {
+					LUT[i]=(uint8_t)min(0xFF,max(0,(int)(i-(amount*255.0f))));
+				}
+				for (int i=0;i<w*h*3;i++){
+					other->RGBdata[i]=LUT[RGBdata[i]];
+				}
+				delete[] LUT;
+				return other;
+			}
+			Image * operator/(const float &amount) {
+				Image *other=new Image(w,h);
+				uint8_t *LUT=new uint8_t[256];
+				for (int i=0;i<256;i++) {
+					LUT[i]=(uint8_t)min(0xFF,max(0,(int)(i/amount)));
+				}
+				for (int i=0;i<w*h*3;i++){
+					other->RGBdata[i]=LUT[RGBdata[i]];
+				}
+				delete[] LUT;
+				return other;
+			}
+			uint8_t *RGBdata;
+			uint8_t *Adata;
+			uint16_t *Zdata;
+			int h,w;
+			bool ownsRGBdata,ownsAdata,ownsZdata; //better done through auto_ptr?
+
+			cv::Mat rgb;
+	};
+}
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