Changeset 72

Timestamp:

04/22/2009 10:58:40 AM (11 years ago)

Author:

dave

Message:

added experimental computer vision code

Location:

foam/trunk

Files:

• experiments (added)
• experiments/Makefile (added)
• experiments/src (added)
• experiments/src/ImageUtils.cpp (added)
• experiments/src/ImageUtils.h (added)
• experiments/src/main.cpp (added)
• simple-faceident/README (modified) (1 diff)
• simple-faceident/src/ImageUtils.cpp (modified) (1 diff)
• simple-faceident/src/ImageUtils.h (modified) (1 diff)

foam/trunk/simple-faceident/README

@@ -53 +53 @@
 * Expose image size and error threshold via yarp
 * Use tinyxml or something better for the serialisation
+* Lighting is a problem
+   - Ignore the problem
+   - Try the edge image trick
+   - LBP
 
 Questions to:

foam/trunk/simple-faceident/src/ImageUtils.cpp

@@ -117 +117 @@
         return ret;
 }
+
+
+
+/////////////////////////////////////////////////////////////
+// return a local binary patterns image of the src image
+
+unsigned char SafeGet2D(IplImage *image, int y, int x, int c)
+{
+        CvSize size = cvGetSize(image);
+        if (x<0 || x>=size.width || y<0 || y>=size.height)
+        {
+                return 0;
+        }
+        
+        return cvGet2D(image,y,x).val[c];
+}
+
+void LBPImage(IplImage *srcimage, IplImage *dstimage)
+{
+        CvSize srcsize = cvGetSize(srcimage);
+        CvSize dstsize = cvGetSize(dstimage);
+        
+        assert(srcsize.width == dstsize.width);
+        assert(srcsize.height == dstsize.height);
+        assert(srcimage->nChannels == dstimage->nChannels);
+
+    for(int y=0; y<srcsize.height; y++)
+        {
+        for(int x=0; x<srcsize.width; x++)
+                {
+                        CvScalar sc;
+
+                        for(int c=0; c<dstimage->nChannels; c++)
+                        {
+                                unsigned char v=0;
+                                unsigned char o=cvGet2D(srcimage,y,x).val[c];
+                                unsigned char b=0;
+                                for (int kx=-1; kx<=1; kx++)
+                                {
+                                        for (int ky=-1; ky<=1; ky++)
+                                        {
+                                                // don't compare with ourself
+                                                if (!(kx==0 && ky==0))
+                                                {
+                                                        if (o>SafeGet2D(srcimage,y+ky,x+kx,c))
+                                                        {
+                                                                v&=1<<b;
+                                                        }
+                                                        b++;
+                                                }
+                                        }
+                                }
+                                sc.val[c]=v;
+                        }
+                        cvSet2D(dstimage,y,x,sc);
+                }
+        }
+}

foam/trunk/simple-faceident/src/ImageUtils.h

@@ -26 +26 @@
 void SubMean(IplImage *image);
 float Diff(IplImage *imagea, IplImage *imageb);
+void LBPImage(IplImage *srcimage, IplImage *dstimage);
 
 #endif