我开发了一个来自DSLR相机的连续读取图像流的应用程序。
while (!liveViewExit)
{
// Create a Memory Stream
stream = new IntPtr();
// Get the bitmap image from the DSLR
bmp = GetEvfImage(stream);
if (bmp != null)
{
// Crop the image.
picImage = (System.Drawing.Image)bmp.Clone(new Rectangle(10, 0, 492, 768), bmp.PixelFormat);
try
{
if (picImage != null)
this.picLiveView.Image = (System.Drawing.Image)picImage.Clone();
}
catch (Exception ex)
{
Utility.HandleError(ex);
}
}
}
运行一段时间后,我对这行代码有这个错误:
this.picLiveView.Image = (System.Drawing.Image)picImage.Clone();
Object is currently in use elsewhere.( at System.Drawing.Image.get_FrameDimensionsList()
at System.Drawing.ImageAnimator.CanAnimate(Image image)
at System.Drawing.ImageAnimator.ImageInfo..ctor(Image image)
at System.Drawing.ImageAnimator.Animate(Image image, EventHandler onFrameChangedHandler)
at System.Windows.Forms.PictureBox.Animate(Boolean animate)
at System.Windows.Forms.PictureBox.Animate()
at System.Windows.Forms.PictureBox.InstallNewImage(Image value, ImageInstallationType installationType)
at System.Windows.Forms.PictureBox.set_Image(Image value)
我认为picLiveView PictureBox控件尚未准备好接受新图像。 知道如何检测PictureBox是否仍在使用中。
//已添加:
这是一个单一的主题。我认为图片框不够快,无法在while循环中处理图片对象。
答案 0 :(得分:2)
多个线程是否正在更新picLiveView
图片?如果是这样就可以解释这个问题。只需使用一个线程,并序列化更新 - 或者您也可以使用锁来访问picLiveView
:
private readonly object myLock = new object();
...
if (picImage != null)
{
lock(myLock)
{
this.picLiveView.Image = (System.Drawing.Image)picImage.Clone();
}
}
答案 1 :(得分:0)
我知道已经很晚了......但试试这个,如果有人有同样的问题......
if (bmp != null)
{
// Crop the image.
picImage = (System.Drawing.Image)bmp.Clone(new Rectangle(10, 0, 492, 768), bmp.PixelFormat);
**Bitmap img = new Bitmap(picImage);
picImage.Dispose();
picImage = null;**
try
{
if (picImage != null)
**this.picLiveView.Image = img;**
}
catch (Exception ex)
{
Utility.HandleError(ex);
}
}