我在图片框中制作了一个强度计。为了制作这个强度计,我使用了一张图片作为拨号器(Dialer.bmp)并使用线制作针。我正在使用 openCV 执行此操作。并更改指针指针,我们在表单加载时创建了一个线程。代码如下
private: System::Void FocusExposure_Load(System::Object^ sender, System::EventArgs^ e) {
if(ExposureThreadStatus)
th->Abort();
th = gcnew Thread(gcnew ThreadStart(this,&FocusExposure::UpdateIntensity));
th->Start();
ExposureThreadStatus = true;
}
void UpdateIntensity()
{
Intensity_Values data;
while(1)
{
data = ReadImage(focusBuffer);
System::Drawing::Bitmap ^bmp=drawImageMeter(data.Max);
this->pictureBox1->Image =this->pictureBox1->Image->FromHbitmap(bmp->GetHbitmap());
delete bmp;
Sleep(1000);
}
}
System::Drawing::Bitmap^ drawImageMeter(float intensity_value)
{
IplImage *Background =cvLoadImage("Dialer.bmp", 1);
int width,height;
if(counter==1)
{
width=Background->width;
height=Background->height;
counter++;
needle_center.x=width/2;
needle_center.y=height/2;
needle_top.x=needle_center.x;
needle_top.y=needle_center.y-140;
}
double const PI = 3.14159265358979323;
int x1 = needle_top.x;
int y1 = needle_top.y;
int x0=needle_center.x;
int y0=needle_center.y;
float angle;
CurrIntensity = intensity_value;
angle = CurrIntensity-PreIntensity;
angle= 0.0703125f * angle;
// degrees, not radians
float radians = angle * (PI / 180.0f); // convert degrees to radians
if (current_max==1)
{
current_max++;
int N1x1 = needle_top.x;
int N1y1 = needle_top.y;
needle1_top.x = ((N1x1-x0) * cos(radians)) - ((N1y1-y0) * sin(radians)) + x0;
needle1_top.y = ((N1x1-x0) * sin(radians)) + ((N1y1-y0) * cos(radians)) + y0;
}
needle_top.x = ((x1-x0) * cos(radians)) - ((y1-y0) * sin(radians)) + x0;
needle_top.y = ((x1-x0) * sin(radians)) + ((y1-y0) * cos(radians)) + y0;
cvLine(Background, needle_center, needle1_top, CV_RGB(0, 0, 255), 1, 4, 0);
cvLine(Background, needle_center, needle_top, CV_RGB(255, 0, 0), 1, 4, 0);
System::Drawing::Bitmap ^bmp = gcnew System::Drawing::Bitmap(Background->width,Background->height,Background->widthStep,System::Drawing::Imaging::PixelFormat::Format24bppRgb,(System::IntPtr)Background->imageData);
PreIntensity = CurrIntensity;
return bmp;
}
此代码工作正常,并根据我的要求提供输出。但唯一的问题是,当我打开表单时,它会导致内存泄漏。我在任务管理器中看到过,也使用过 Intel Vtune 分析器。此分析器在以下行显示不匹配的分配/解除分配
IplImage *Background =cvLoadImage("Dialer.bmp", 1);
我们需要重新加载此图像,因为我们正在图像上绘制线条,并且当指针指针发生变化时,它需要没有指针的拨号器图像。
任何人都可以向我建议任何解决此内存泄漏问题的解决方案。
任何帮助将不胜感激。