diff --git a/channels/private/convConst.cpp b/channels/private/convConst.cpp
index fe5ba4ba..9c5c80e4 100644
--- a/channels/private/convConst.cpp
+++ b/channels/private/convConst.cpp
@@ -197,7 +197,8 @@ void convMax( float *I, float *O, int h, int w, int d, int r ) {
 // B=convConst(type,A,r,s); fast 2D convolutions (see convTri.m and convBox.m)
 #ifdef MATLAB_MEX_FILE
 void mexFunction( int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[] ) {
-  int *ns, ms[3], nDims, d, m, r, s; float *A, *B, p;
+  int nDims; float *A, *B, p;
+  mwSize ms[3]; mwSize *ns, d, m, r, s;;
   mxClassID id; char type[1024];
 
   // error checking on arguments
@@ -205,7 +206,7 @@ void mexFunction( int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[] ) {
   if(nlhs > 1) mexErrMsgTxt("One output expected.");
   nDims = mxGetNumberOfDimensions(prhs[1]);
   id = mxGetClassID(prhs[1]);
-  ns = (int*) mxGetDimensions(prhs[1]);
+  ns = (mwSize*) mxGetDimensions(prhs[1]);
   d = (nDims == 3) ? ns[2] : 1;
   m = (ns[0] < ns[1]) ? ns[0] : ns[1];
   if( (nDims!=2 && nDims!=3) || id!=mxSINGLE_CLASS || m<4 )
diff --git a/channels/private/gradientMex.cpp b/channels/private/gradientMex.cpp
index dee62960..a41f0ee9 100644
--- a/channels/private/gradientMex.cpp
+++ b/channels/private/gradientMex.cpp
@@ -318,8 +318,8 @@ void fhog( float *M, float *O, float *H, int h, int w, int binSize,
 /******************************************************************************/
 #ifdef MATLAB_MEX_FILE
 // Create [hxwxd] mxArray array, initialize to 0 if c=true
-mxArray* mxCreateMatrix3( int h, int w, int d, mxClassID id, bool c, void **I ){
-  const int dims[3]={h,w,d}, n=h*w*d; int b; mxArray* M;
+mxArray* mxCreateMatrix3( mwSize h, mwSize w, mwSize d, mxClassID id, bool c, void **I ){
+  const mwSize dims[3]={h,w,d}, n=h*w*d; int b; mxArray* M;
   if( id==mxINT32_CLASS ) b=sizeof(int);
   else if( id==mxDOUBLE_CLASS ) b=sizeof(double);
   else if( id==mxSINGLE_CLASS ) b=sizeof(float);
@@ -331,9 +331,9 @@ mxArray* mxCreateMatrix3( int h, int w, int d, mxClassID id, bool c, void **I ){
 
 // Check inputs and outputs to mex, retrieve first input I
 void checkArgs( int nl, mxArray *pl[], int nr, const mxArray *pr[], int nl0,
-  int nl1, int nr0, int nr1, int *h, int *w, int *d, mxClassID id, void **I )
+  int nl1, int nr0, int nr1, mwSize *h, mwSize *w, mwSize *d, mxClassID id, void **I )
 {
-  const int *dims; int nDims;
+  const mwSize *dims; int nDims;
   if( nl<nl0 || nl>nl1 ) mexErrMsgTxt("Incorrect number of outputs.");
   if( nr<nr0 || nr>nr1 ) mexErrMsgTxt("Incorrect number of inputs.");
   nDims = mxGetNumberOfDimensions(pr[0]); dims = mxGetDimensions(pr[0]);
@@ -344,7 +344,7 @@ void checkArgs( int nl, mxArray *pl[], int nr, const mxArray *pr[], int nl0,
 
 // [Gx,Gy] = grad2(I) - see gradient2.m
 void mGrad2( int nl, mxArray *pl[], int nr, const mxArray *pr[] ) {
-  int h, w, d; float *I, *Gx, *Gy;
+  mwSize h, w, d; float *I, *Gx, *Gy;
   checkArgs(nl,pl,nr,pr,1,2,1,1,&h,&w,&d,mxSINGLE_CLASS,(void**)&I);
   if(h<2 || w<2) mexErrMsgTxt("I must be at least 2x2.");
   pl[0]= mxCreateMatrix3( h, w, d, mxSINGLE_CLASS, 0, (void**) &Gx );
@@ -354,7 +354,8 @@ void mGrad2( int nl, mxArray *pl[], int nr, const mxArray *pr[] ) {
 
 // [M,O] = gradMag( I, channel, full ) - see gradientMag.m
 void mGradMag( int nl, mxArray *pl[], int nr, const mxArray *pr[] ) {
-  int h, w, d, c, full; float *I, *M, *O=0;
+  mwSize h, w, d;
+  int c, full; float *I, *M, *O=0;
   checkArgs(nl,pl,nr,pr,1,2,3,3,&h,&w,&d,mxSINGLE_CLASS,(void**)&I);
   if(h<2 || w<2) mexErrMsgTxt("I must be at least 2x2.");
   c = (int) mxGetScalar(pr[1]); full = (int) mxGetScalar(pr[2]);
@@ -366,7 +367,7 @@ void mGradMag( int nl, mxArray *pl[], int nr, const mxArray *pr[] ) {
 
 // gradMagNorm( M, S, norm ) - operates on M - see gradientMag.m
 void mGradMagNorm( int nl, mxArray *pl[], int nr, const mxArray *pr[] ) {
-  int h, w, d; float *M, *S, norm;
+  mwSize h, w, d; float *M, *S, norm;
   checkArgs(nl,pl,nr,pr,0,0,3,3,&h,&w,&d,mxSINGLE_CLASS,(void**)&M);
   if( mxGetM(pr[1])!=h || mxGetN(pr[1])!=w || d!=1 ||
     mxGetClassID(pr[1])!=mxSINGLE_CLASS ) mexErrMsgTxt("M or S is bad.");
@@ -376,7 +377,8 @@ void mGradMagNorm( int nl, mxArray *pl[], int nr, const mxArray *pr[] ) {
 
 // H=gradHist(M,O,[...]) - see gradientHist.m
 void mGradHist( int nl, mxArray *pl[], int nr, const mxArray *pr[] ) {
-  int h, w, d, hb, wb, nChns, binSize, nOrients, softBin, useHog;
+  mwSize h, w, d, hb, wb;
+  int nChns, binSize, nOrients, softBin, useHog;
   bool full; float *M, *O, *H, clipHog;
   checkArgs(nl,pl,nr,pr,1,3,2,8,&h,&w,&d,mxSINGLE_CLASS,(void**)&M);
   O = (float*) mxGetPr(pr[1]);
diff --git a/channels/private/imPadMex.cpp b/channels/private/imPadMex.cpp
index a8363e3e..23338910 100644
--- a/channels/private/imPadMex.cpp
+++ b/channels/private/imPadMex.cpp
@@ -69,14 +69,15 @@ template<class T> void imPad( T *A, T *B, int h, int w, int d, int pt, int pb,
 // B = imPadMex(A,pad,type); see imPad.m for usage details
 #ifdef MATLAB_MEX_FILE
 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
-  int *ns, ms[3], nCh, nDims, pt, pb, pl, pr, flag, k; double *p;
+  int nCh, nDims, pt, pb, pl, pr, flag, k; double *p;
+  mwSize *ns, ms[3], *ns_out;
   void *A, *B; mxClassID id; double val=0; char type[1024];
 
   // Error checking on arguments
   if( nrhs!=3 ) mexErrMsgTxt("Three inputs expected.");
   if( nlhs>1 ) mexErrMsgTxt("One output expected.");
   nDims=mxGetNumberOfDimensions(prhs[0]); id=mxGetClassID(prhs[0]);
-  ns = (int*) mxGetDimensions(prhs[0]); nCh=(nDims==2) ? 1 : ns[2];
+  ns = (mwSize*) mxGetDimensions(prhs[0]); nCh=(nDims==2) ? 1 : ns[2];
   if( (nDims!=2 && nDims!=3) ||
     (id!=mxSINGLE_CLASS && id!=mxDOUBLE_CLASS && id!=mxUINT8_CLASS) )
     mexErrMsgTxt("A should be 2D or 3D single, double or uint8 array.");
@@ -102,10 +103,13 @@ void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
   if( ns[0]==0 || ns[1]==0 ) flag=0;
 
   // create output array
-  ms[0]=ns[0]+pt+pb; ms[1]=ns[1]+pl+pr; ms[2]=nCh;
-  if( ms[0]<0 || ns[0]<=-pt || ns[0]<=-pb ) ms[0]=0;
-  if( ms[1]<0 || ns[1]<=-pl || ns[1]<=-pr ) ms[1]=0;
-  plhs[0] = mxCreateNumericArray(3, (const mwSize*) ms, id, mxREAL);
+  ms[0]=ns[0]+mwSize(pt)+mwSize(pb); 
+  ms[1]=ns[1]+mwSize(pl)+mwSize(pr); 
+  ms[2]=mwSize(nCh);
+
+  if( ms[0]<0 || int(ns[0])<=-int(pt) || int(ns[0])<=-int(pb) ) ms[0]=0;
+  if( ms[1]<0 || int(ns[1])<=-int(pl) || int(ns[1])<=-int(pr) ) ms[1]=0;
+  plhs[0] = mxCreateNumericArray(3, ms, id, mxREAL);
   if( ms[0]==0 || ms[1]==0 ) return;
 
   // pad array
diff --git a/channels/private/imResampleMex.cpp b/channels/private/imResampleMex.cpp
index 8d23eebb..00d575fb 100644
--- a/channels/private/imResampleMex.cpp
+++ b/channels/private/imResampleMex.cpp
@@ -117,7 +117,9 @@ void resample( T *A, T *B, int ha, int hb, int wa, int wb, int d, T r ) {
       if(ybd[0]==2) for(; y<hb; y++) { ya=yas[y*4]; B0[y]=U(0)+U(1); }
       if(ybd[0]==3) for(; y<hb; y++) { ya=yas[y*4]; B0[y]=U(0)+U(1)+U(2); }
       if(ybd[0]==4) for(; y<hb; y++) { ya=yas[y*4]; B0[y]=U(0)+U(1)+U(2)+U(3); }
-      if(ybd[0]>4)  for(; y<hn; y++) { B0[ybs[y]] += C[yas[y]] * ywts[y]; }
+      if(ybd[0]>4) {  
+         for(int i=0; i<hb; i++) { B0[i] = 0; }
+         for(; y<hn; y++) { B0[ybs[y]] += C[yas[y]] * ywts[y]; } }
       #undef U
     } else {
       for(y=0; y<ybd[0]; y++) B0[y] = C[yas[y]]*ywts[y];
@@ -132,14 +134,16 @@ void resample( T *A, T *B, int ha, int hb, int wa, int wb, int d, T r ) {
 // B = imResampleMex(A,hb,wb,nrm); see imResample.m for usage details
 #ifdef MATLAB_MEX_FILE
 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
-  int *ns, ms[3], n, m, nCh, nDims;
+  int n, m, nCh, nDims;
+  mwSize ms[3];
+  mwSize *ns;
   void *A, *B; mxClassID id; double nrm;
 
   // Error checking on arguments
   if( nrhs!=4) mexErrMsgTxt("Four inputs expected.");
   if( nlhs>1 ) mexErrMsgTxt("One output expected.");
   nDims=mxGetNumberOfDimensions(prhs[0]); id=mxGetClassID(prhs[0]);
-  ns = (int*) mxGetDimensions(prhs[0]); nCh=(nDims==2) ? 1 : ns[2];
+  ns = (mwSize*) mxGetDimensions(prhs[0]); nCh=(nDims==2) ? 1 : ns[2];
   if( (nDims!=2 && nDims!=3) ||
     (id!=mxSINGLE_CLASS && id!=mxDOUBLE_CLASS && id!=mxUINT8_CLASS) )
     mexErrMsgTxt("A should be 2D or 3D single, double or uint8 array.");
diff --git a/channels/private/rgbConvertMex.cpp b/channels/private/rgbConvertMex.cpp
index bb616da4..6786ed80 100644
--- a/channels/private/rgbConvertMex.cpp
+++ b/channels/private/rgbConvertMex.cpp
@@ -168,13 +168,14 @@ oT* rgbConvert( iT *I, int n, int d, int flag, oT nrm ) {
 // J = rgbConvertMex(I,flag,single); see rgbConvert.m for usage details
 #ifdef MATLAB_MEX_FILE
 void mexFunction(int nl, mxArray *pl[], int nr, const mxArray *pr[]) {
-  const int *dims; int nDims, n, d, dims1[3]; void *I; void *J; int flag;
+  const mwSize *dims; int nDims, n, d; void *I; void *J; int flag;
+  mwSize dims1[3];
   bool single; mxClassID idIn, idOut;
 
   // Error checking
   if( nr!=3 ) mexErrMsgTxt("Three inputs expected.");
   if( nl>1 ) mexErrMsgTxt("One output expected.");
-  dims = (const int*) mxGetDimensions(pr[0]); n=dims[0]*dims[1];
+  dims = (const mwSize*) mxGetDimensions(pr[0]); n=dims[0]*dims[1];
   nDims = mxGetNumberOfDimensions(pr[0]);
   d = 1; for( int i=2; i<nDims; i++ ) d*=dims[i];
 
diff --git a/detector/models/AcfInriaDetector.mat b/detector/models/AcfInriaDetector.mat
index c0ff31b3..ea3ed4f8 100644
Binary files a/detector/models/AcfInriaDetector.mat and b/detector/models/AcfInriaDetector.mat differ
diff --git a/images/private/histc2c.c b/images/private/histc2c.c
index 65688ae0..4763f2a6 100644
--- a/images/private/histc2c.c
+++ b/images/private/histc2c.c
@@ -40,7 +40,7 @@ int findBin( double x, double *edges, int nBins ) {
 *  sub2ind(ind,sub,subMul,nd)
 *******************************************************************************/
 #define sub2ind(ind, sub, subMul, nd) ind=sub[0]; for(k=1;k<nd;k++) ind+=sub[k]*subMul[k];
-int *sub2ind_init( const int*siz, const int nd ) {
+int *sub2ind_init( const mwSize*siz, const int nd ) {
   int i, *subMul;
   subMul = (int*) mxCalloc( nd, sizeof(int));
   subMul[0] = 1; for(i=1; i<nd; i++ ) subMul[i]=subMul[i-1]*siz[i-1];
@@ -48,7 +48,7 @@ int *sub2ind_init( const int*siz, const int nd ) {
 }
 
 /* construct the nd dimensional histogram */
-void histcND( double* h, double* A, double* wtMask, int n, int nd, double**edges, int* nBins ) {
+void histcND( double* h, double* A, double* wtMask, int n, int nd, double**edges, mwSize* nBins ) {
   int i, j, k, inbounds; int *subMul, *sub, ind;
   sub = (int *) mxMalloc( nd * sizeof(int) );
   subMul = sub2ind_init( nBins, nd );
@@ -67,7 +67,9 @@ void histcND( double* h, double* A, double* wtMask, int n, int nd, double**edges
 }
 
 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
-  int i, n, nd, *nBins; double *A, *wtMask, **edges, *h;
+  int i, n, nd;
+  mwSize *nBins;
+  double *A, *wtMask, **edges, *h;
   
   /* Error checking on arguments PRHS=[A1, wtMask, edges1, edges2, ...]; PLHS=[h] */
   if( nrhs < 3) mexErrMsgTxt("At least three input arguments required.");
@@ -83,7 +85,7 @@ void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
   /* extract arguments */
   A = mxGetPr(prhs[0]);
   wtMask = mxGetPr(prhs[1]);
-  nBins = (int*) mxMalloc( nd * sizeof(int) );
+  nBins = (mwSize*) mxMalloc( nd * sizeof(int) );
   for( i=0; i<nd; i++) nBins[i] = mxGetN(prhs[i+2])-1;
   edges = (double**) mxMalloc( nd * sizeof(double*) );
   for( i=0; i<nd; i++) edges[i] = mxGetPr(prhs[i+2]);
diff --git a/images/private/imtransform2_c.c b/images/private/imtransform2_c.c
index 44d84df9..f15961e8 100644
--- a/images/private/imtransform2_c.c
+++ b/images/private/imtransform2_c.c
@@ -251,7 +251,8 @@ void homogToInds(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
 
 void applyTransform(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
   /* J=applyTransform(I,rs,cs,is,flag); */
-  int flag, *nsI, nsJ[3], areaJ, areaI, nDims, i, k, id, *is;
+  mwSize nsJ[3];
+  int flag, *nsI, areaJ, areaI, nDims, i, k, id, *is;
   double *I, *J, *I1, *J1, *rs, *cs, wr, wc, wrc, r, c;
 
   /* extract inputs */
diff --git a/videos/private/ktComputeW_c.c b/videos/private/ktComputeW_c.c
index 56504c24..dabf9d9e 100644
--- a/videos/private/ktComputeW_c.c
+++ b/videos/private/ktComputeW_c.c
@@ -23,7 +23,8 @@ void ktComputeW( double* w, uchar* B, double* q, double *p, int n, int nBits ) {
 
 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
   /* Declare variables. */
-  int n, nBits, dims[2];
+  int n, nBits;
+  mwSize dims[2];
   uchar *B; double *q, *p, *w;
   
   /* PRHS=[B, q, p, nBits]; PLHS=[w] */
diff --git a/videos/private/ktHistcRgb_c.c b/videos/private/ktHistcRgb_c.c
index a62d6f40..c56747ae 100644
--- a/videos/private/ktHistcRgb_c.c
+++ b/videos/private/ktHistcRgb_c.c
@@ -26,7 +26,9 @@ void ktHistcRgb( double* h, uchar* B, double* wtMask, int n, int nBits ) {
 }
 
 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {
-  int n, nBits, dims[3]; uchar *B; double *wtMask, *h;
+  int n, nBits;
+  mwSize dims[3]; 
+  uchar *B; double *wtMask, *h;
   
   /* PRHS=[B, wtMask, nBits]; PLHS=[h] */
   if( nrhs != 3) mexErrMsgTxt("Three input arguments required.");