color event in python

[Jason Wu]

I notice that in DV software, events are presented in green - red color mode. However, I failed to get such events in a python script. Moreover, existing color mode in docs are in a white background, which is different from what is in the software, a black one. I tried to read API but it's a CPP version. Here is the code. It's just the one from the website.

```

# Open the camera

camera = dv.io.CameraCapture()

camera.setDavisColorMode(dv.io.CameraCapture.DavisColorMode.Color)

# Initialize visualizer instance which generates event data preview

visualizer = dv.visualization.EventVisualizer(camera.getEventResolution())

# Create the preview window

cv.namedWindow("Preview", cv.WINDOW_NORMAL)

def preview_events(event_slice):

cv.imshow("Preview", visualizer.generateImage(event_slice))

cv.waitKey(2)

# Create an event slicer, this will only be used events only camera

slicer = dv.EventStreamSlicer()

slicer.doEveryTimeInterval(datetime.timedelta(milliseconds=33), preview_events)

# start read loop

while True:

# Get events

events = camera.getNextEventBatch()

# If no events arrived yet, continue reading

if events is not None:

slicer.accept(events)

```

[Jason Wu]

I've solved this problem. In class visualizer, there are methods to set background, positive and negative colors. Besides, I think modules on DV software can be confusing since events can be directly showed on UI while visualizer actually works.