我在Labwindows \ CVI中使用National Instruments Vision模块
出于某种原因,当我使用func imaqDetectLines()
时,我得到FATAL RUN-TIME ERROR: "Angle tracker.c", line 50, col 11, thread id 0x00002004: The program has caused a 'General Protection' fault at 0x6C5AD446.
这是我的代码:
#include "nivision.h"
#include <userint.h>
#include <cvirte.h>
int main (int argc, char *argv[])
{
int nLines;
ShapeDetectionOptions stShapeDetectionOption;
RangeFloat aAngleRanges[2]={{0,10.0},{10.0,20.0}};
CurveOptions stCurveOptions = {0};
LineMatch *aLm;
LineDescriptor lineDesc;
Image *imageHdl = NULL, *imageDestHdl = NULL;
char temp[1024] ="";
if (InitCVIRTE (0, argv, 0) == 0)
return -1; /* out of memory */
imageHdl = imaqCreateImage (0/*U8*/,1);
imageDestHdl = imaqCreateImage (0/*U8*/,1);
strcpy(temp,"C:\\CVI2013\\Projects\\Angel Tracker\\IMG\\CC01.bmp");
imaqReadFile (imageHdl, temp, NULL, NULL);
imaqEdgeFilter (imageDestHdl, imageHdl, IMAQ_EDGE_SOBEL, NULL);
lineDesc.maxLength = 100;
lineDesc.minLength = 50;
stShapeDetectionOption.minMatchScore = 1;
stShapeDetectionOption.mode = 0;
stShapeDetectionOption.numAngleRanges = 1;
stShapeDetectionOption.angleRanges = aAngleRanges;
stShapeDetectionOption.scaleRange.minValue = 1;
stShapeDetectionOption.scaleRange.maxValue = 10;
stCurveOptions.extractionMode = 0;
stCurveOptions.threshold = 100;
stCurveOptions.filterSize = 1;
stCurveOptions.minLength = 100;
stCurveOptions.rowStepSize = 10;
stCurveOptions.columnStepSize = 10;
stCurveOptions.maxEndPointGap = 1000;
stCurveOptions.onlyClosed = TRUE;
stCurveOptions.subpixelAccuracy = TRUE;
aLm = imaqDetectLines(imageDestHdl, &lineDesc, &stCurveOptions
,&stShapeDetectionOption, NULL, &nLines);
return 0;
}
我实际在做的是:
打开BMP文件
使用SOBEL用imaqEdgeFilter()
func填充边缘
然后我想检测imaqDetectLines()
func
答案 0 :(得分:1)
我发现了问题。
如果你看一下函数调用:
aLm = imaqDetectLines(imageDestHdl, &lineDesc, &stCurveOptions
,&stShapeDetectionOption, NULL, &nLines);
对于ROI参数,我传递了NULL,因为我从功能面板帮助中得到了这个:
应用于图像的感兴趣区域,用于指定可以检测圆圈的位置。将此参数设置为NULL以搜索整个图像。
但是,显然这是一个已知错误,它将被修复,所以为了解决这个问题,请执行以下操作:
ROI *roi;
imaqSetWindowROI (0, NULL);
roi = imaqGetWindowROI (0);
然后将其发送到函数:
aLm = imaqDetectLines(imageDestHdl, &lineDesc, &stCurveOptions
,&stShapeDetectionOption, roi, &nLines);