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  /external/opencv/cv/src/
cvlkpyramid.cpp 462 float* Iy = _Iy[threadIdx];
500 icvCalcIxIy_32f( patchI, isz.width*sizeof(patchI[0]), Ix, Iy,
541 const float* iy = Iy + (ix - Ix); local
547 by += t0 * iy[x];
561 const float* iy = Iy + (ix - Ix); local
567 by += (double) (t * iy[x]);
569 Gxy += ix[x] * iy[x];
570 Gyy += iy[x] * iy[x]
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  /packages/apps/LegacyCamera/jni/feature_stab/db_vlvm/
db_feature_detection.cpp 69 /*Compute derivatives Ix,Iy for a subrow of img with upper left (i,j) and width chunk_width
71 inline void db_IxIyRow_f(float *Ix,float *Iy,const float * const *img,int i,int j,int chunk_width)
78 Iy[c]=img[i-1][j+c]-img[i+1][j+c];
82 /*Compute derivatives Ix,Iy for a subrow of img with upper left (i,j) and width 128
202 int Ix,Iy;
207 Iy=(img[i-1][j+c]-img[i+1][j+c])>>1;
209 dxx[c+128]=Ix*Iy;
210 dxx[c+256]=Iy*Iy;
621 float *Ix[5],*Iy[5]
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