get_next_frame()

Take a image frame from the selected camera.

Reference

Arguments

Return

• When compressed == False:
  • A Numpy array with shape (height, width, 3), where 3 represents RGB channels. height and width depend on the selected camera.
• When compressed == True:
  • An uni dimensional Numpy array with jpeg RGB compressed image.
• When get_timestamp == True:
  • Tuple (image, timestamp), timestamp in tuple (second, milliseconds).

Exceptions

• RayaCameraInvalidName
• RayaCameraNotEnabled
• RayaCameraNotFrameReceived


See the complete list of cameras exceptions.

Usage Example

1. Take a image frame and show it

This example takes a image frame and show it for 3 seconds.

from raya.application_base import RayaApplicationBase
from raya.tools.image import show_image

class RayaApplication(RayaApplicationBase):
    async def setup(self):
        self.cameras = await self.enable_controller('cameras')
        await self.cameras.enable_color_camera('chest')

    async def loop(self):
        img = await self.cameras.get_next_frame('chest')
        show_image(img=img, title='Chedfs')
        await self.sleep(3.0)
        self.finish_app()

from raya.application_base import RayaApplicationBase
from raya.tools.image import show_image

class RayaApplication(RayaApplicationBase):
    async def setup(self):
        self.cameras = await self.enable_controller('cameras')
        await self.cameras.enable_color_camera('chest')

    async def loop(self):
        img, timestamp = await self.cameras.get_next_frame(camera_name='chest', get_timestamp=True)
        print('Timestamp: ', timestamp)
        show_image(img=img, title='Chedfs')
        await self.sleep(3.0)
        self.finish_app()