Matrix Vision mvBlueFOX3 - Working with Triggers; Triggering with an Incremental Encoder

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20.3.3 Reducing noise by frame averaging

20.3.3.1 What is frame average?

As the name suggests, the functionality averages the gray values of each pixel using the information of subsequent

frames. This can be used to

• reduce the noise in an image and

• compensate motion in an image.

MATRIX VISION implemented one version of the frame averaging:

• "mvNTo1".

This mode is a FPGA function which will not need any CPU of the host system. However, this mode is only available

for the following cameras:

• mvBlueFOX3-1xxx family,

• mvBlueFOX3-2024G/C and

• mvBlueFOX3-2032G/C.

20.3.3.2 mvNTo1

To get an averaged pixel, this mode takes the gray value of each pixel of the speciﬁed number of subsequent frames

("mv Frame Average Frame Count") and calculates the average. E.g. Averaging of pixel [0,0] using 8 frames

("mv Frame Average Frame Count = 8") will be as follows:

Gray_value[0,0,image1] + Gray_value[0,0,image2] + ... + Gray_value[0,0,image8]

Pixel_avg[0,0] = ------------------------------------------------------------------------------

20.3.3.2.1 Using wxPropView

Using the frame average mode "mvNTo1", you have to do the following step:

1. Start wxPropView (p. 74) and

2. connect to the camera.

3. Then specify in "Setting -> Base -> Camera -> GenICam -> Device Control" which processing unit of the

camera should do the frame averaging, e.g. unit 0 should do the frame averaging

"mv Device Processing Unit Selector = 0"

"mv Device Processing Unit = mvFrameAverage".

Afterwards, "mv Frame Average Control" is available.

4. Now open "Setting -> Base -> Camera -> GenICam -> mv Frame Average Control" and

5. select "mv Frame Average Mode = mvNto1".

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