.. _examples_nodes/models/grayscale_laplacian:

Example: nodes/models/grayscale_laplacian.py
============================================

.. code-block:: python

	# Copyright (c) 2024 Justin Davis (davisjustin302@gmail.com)
	#
	# MIT License
	"""Example showcasing how to use the Laplacian model."""
	
	from __future__ import annotations
	
	import cv2
	import depthai as dai
	from oakutils.nodes import create_color_camera, create_xout, get_nn_gray_frame
	from oakutils.nodes.models import create_laplacian
	
	pipeline = dai.Pipeline()
	
	# create the color camera node
	cam = create_color_camera(
	    pipeline,
	    preview_size=(640, 480),
	)  # set the preview size to the input of the nn
	
	lap = create_laplacian(
	    pipeline,
	    input_link=cam.preview,
	    kernel_size=7,
	    blur_kernel_size=3,
	    use_blur=True,
	    grayscale_out=True,
	)
	xout_lap = create_xout(pipeline, lap.out, "laplacian")
	
	with dai.Device(pipeline) as device:
	    lp_queue: dai.DataOutputQueue = device.getOutputQueue("laplacian")
	
	    while True:
	        lp_data = lp_queue.get()
	        lp_frame = get_nn_gray_frame(lp_data, normalization=255.0)
	
	        cv2.imshow("laplacian frame", lp_frame)
	        if cv2.waitKey(1) == ord("q"):
	            break