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POpthread parallel processing
 

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    <p>Need urgent help on thread: the goal here is the separtemask will take each image and separate different contours and for each contour in the image it will call handleobject thread. So every for loop will call the handeobject thread. However, object index variable needs to be passed in each thread. But only last value of objectndex is passed, this is becuase the speratemask function loops and repalces the value of obj.objindx and only the last value of obj.objindx is passed to all the threads. Is there anyway to pass each objectindex value in handleobject. The code runs fine if we uncomment the pthread_join(tid[objectIndex],NULL); but it will not give a parralel program</p> <pre><code>void separateMask(IplImage *maskImg) { for(r = contours; r != NULL; r = r-&gt;h_next) { cvSet(objectMaskImg, cvScalarAll(0), NULL); CvScalar externalColor = cvScalarAll(0xff); CvScalar holeColor = cvScalarAll(0x00); int maxLevel = -1; int thinkness = CV_FILLED; int lineType = 8; /* 8-connected */ cvDrawContours(objectMaskImg, r, externalColor, holeColor, maxLevel, thinkness,lineType, cvPoint(0,0));; obj.objectMaskImg1[objectIndex]=(IplImage *) malloc(sizeof(IplImage)); obj.objectMaskImg1[objectIndex]=objectMaskImg; obj.objindx=objectIndex; obj.intensityOut1=intensityOut; obj.tasOut1=tasOut; pthread_create(&amp;tid[objectIndex],NULL,handleObject,(void *)&amp;obj); //pthread_join(tid[objectIndex],NULL); printf("objectindx %d\n",obj.objindx); objectIndex++; } // cvReleaseImage(&amp;objectMaskImg); //cvReleaseMemStorage(&amp;storage); printf("Exitng Separatemask\n"); } void* handleObject(void *arg) { int i, j; handle *hndl; hndl=(handle *) malloc(sizeof(handle)); hndl=(handle*)arg; pthread_mutex_t lock=PTHREAD_MUTEX_INITIALIZER; pthread_mutex_lock(&amp;lock); IplImage *pImg; float statistics_ratio[3][9]; pthread_t tid3; tas3 tas2; pImg = cvLoadImage("image.tif", CV_LOAD_IMAGE_ANYCOLOR | CV_LOAD_IMAGE_ANYDEPTH); if(pImg == NULL) { fprintf(stderr, "Fail to load image %s\n", "tiff file"); return ; } tas2.pImg1=pImg; printf("tst%d\n",hndl-&gt;objindx); tas2.x=hndl-&gt;objindx; tas2.objectMaskImg1=hndl-&gt;objectMaskImg1[tas2.x]; tas2.statistics_ratio[3][9]=statistics_ratio[3][9]; double mean = average_intensity(pImg, tas2.objectMaskImg1); int total = total_white(pImg, tas2.objectMaskImg1); pthread_mutex_unlock(&amp;lock); printf("Exiting handle object thread_id %d\n\n", pthread_self()); } </code></pre>
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    1. USmathematician1975
    1. USuser1373805
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    1. COI have one extra question. My attached code only identifies contour that are not lebeled, performs only on 1 and zero labeled masks. My input mask images are actually labelled with 1,2,3,4.... of each contour. Example, first contour is labeled as 1, second is is labeled as 2, intead of only 1 for all contours. How can modify my code so I may be able to separate each contour separately base on the labeled image. Example contour1 a separate image, contour2 another separate image.
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      1. USuser1373805
 

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