Refreshing pictures causes high CPU usage.

[ChengYen-Tang]

Because I need to draw the bounding box in the video, I take out each frame of the video to draw the bounding box, and then refresh the Image component. But this is causing high CPU usage. Is there any suggestion to solve the high CPU usage caused by high frequency refresh of the form?

Thank you.

[miloush]

Can you elaborate on how you refresh the Image component? Are you using the WriteableBitmap?

[ChengYen-Tang]

Sorry, I deleted the test project a few weeks ago.
Yes, I use WriteableBitmap, and I will start the official project soon.
But I have another question. If there are N Image component on a Page, and each component updates the content asynchronously, will the refresh rate of the Page become N times?

Thank you.

[lindexi]

@ChengYen-Tang It will refresh one time when some picture updates in a dispatcher time.

[ChengYen-Tang]

If my source is a jpeg byte array, is there any better way besides using BitmapFrame.Create?
Thank you.

[ChengYen-Tang]

@ChengYen-Tang It will refresh one time when some picture updates in a dispatcher time.

Hi @lindexi,
So, if I use timmer to call Dispatcher.Invoke at a frequency of 30HZ, then Invoke includes the action of updating 4 pictures. In this way, the 4 Image components on my page will be updated at a frequency of 30HZ at the same time. right?

[lindexi]

@ChengYen-Tang Try and test. I do not know