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POopencl local array within kernel
 

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    <p>I am trying to detect a circle in binary image using hough transform. and post my problem here <a href="https://stackoverflow.com/questions/19667582/hough-transform-improving-algorithm-efficiency-over-opencl">Hough Transform: improving algorithm efficiency over OpenCL</a></p> <p>the kernel code is very slow when execute . the wait time in atomic function and i try to use local memory for that is faster but the problem in output accumulator in[] the kernel code </p> <pre><code> kernel void hough_circle(read_only image2d_t imageIn, global int* in,const int w_hough,__global int * circle) { sampler_t sampler=CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP_TO_EDGE | CLK_FILTER_NEAREST; int gid0 = get_global_id(0); int gid1 = get_global_id(1); const int nWidth = get_local_size(0); int i = get_group_id(0); int j = get_group_id(1); int idX = get_local_id(0); int idY = get_local_id(1); int ii = i*nWidth + idX; int jj = j*nWidth + idY; uint4 pixel; int x0=0,y0=0,r; int maxval=0; local int localImage[25]; localImage[idY*5+idX] = 0; barrier(CLK_LOCAL_MEM_FENCE); pixel=read_imageui(imageIn,sampler,(int2)(gid0,gid1)); if(pixel.x==255) { // #pragma unroll 20 for(int r=90;r&lt;110;r+=1) { // int r=190; // #pragma unroll 360 for(int theta=0; theta&lt;360;theta++) { // x0=(int) round(gid0-r*cos( (float) radians( (float) theta) )); // y0=(int) round(gid1-r*sin( (float) radians( (float) theta) )); x0=(int) round(gid0-r*sin_parameter[theta] ); y0=(int) round(gid1-r*cos_parameter[theta] ); if((x0&gt;0) &amp;&amp; (x0&lt;get_global_size(0)) &amp;&amp; (y0&gt;0)&amp;&amp;(y0&lt;get_global_size(1))) // in[w_hough*y0+x0]++; localImage[5*y0+x0]++; // atom_inc(&amp;in[w_hough*y0+x0]); } } } in[jj*w_hough+ii]= localImage[jj*5+ii]; } </code></pre> <p>the local the problem in output accumulator in[] show incorrect value random can any one help me what change i do to solve the problem </p>
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