65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
import dearpygui.dearpygui as dpg
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import cv2 as cv
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import numpy as np
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dpg.create_context()
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dpg.create_viewport(title='Custom Title', width=600, height=800)
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dpg.setup_dearpygui()
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vid = cv.VideoCapture(0)
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ret, frame = vid.read()
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# image size or you can get this from image shape
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frame_width = vid.get(cv.CAP_PROP_FRAME_WIDTH)
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frame_height = vid.get(cv.CAP_PROP_FRAME_HEIGHT)
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video_fps = vid.get(cv.CAP_PROP_FPS)
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print(frame_width)
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print(frame_height)
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print(video_fps)
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print("Frame Array:")
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print("Array is of type: ", type(frame))
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print("No. of dimensions: ", frame.ndim)
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print("Shape of array: ", frame.shape)
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print("Size of array: ", frame.size)
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print("Array stores elements of type: ", frame.dtype)
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data = np.flip(frame, 2) # because the camera data comes in as BGR and we need RGB
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data = data.ravel() # flatten camera data to a 1 d stricture
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data = np.asarray(data, dtype=np.float32) # change data type to 32bit floats
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texture_data = np.true_divide(data, 255.0) # normalize image data to prepare for GPU
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print("texture_data Array:")
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print("Array is of type: ", type(texture_data))
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print("No. of dimensions: ", texture_data.ndim)
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print("Shape of array: ", texture_data.shape)
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print("Size of array: ", texture_data.size)
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print("Array stores elements of type: ", texture_data.dtype)
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with dpg.texture_registry(show=True):
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dpg.add_raw_texture(frame.shape[1], frame.shape[0], texture_data, tag="texture_tag", format=dpg.mvFormat_Float_rgb)
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with dpg.window(label="Example Window"):
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dpg.add_text("Hello, world")
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dpg.add_image("texture_tag")
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dpg.show_metrics()
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dpg.show_viewport()
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while dpg.is_dearpygui_running():
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# updating the texture in a while loop the frame rate will be limited to the camera frame rate.
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# commenting out the "ret, frame = vid.read()" line will show the full speed that operations and updating a texture can run at
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ret, frame = vid.read()
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data = np.flip(frame, 2)
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data = data.ravel()
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data = np.asarray(data, dtype=np.float32)
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texture_data = np.true_divide(data, 255.0)
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dpg.set_value("texture_tag", texture_data)
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# to compare to the base example in the open cv tutorials uncomment below
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#cv.imshow('frame', frame)
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dpg.render_dearpygui_frame()
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vid.release()
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#cv.destroyAllWindows() # when using upen cv window "imshow" call this also
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dpg.destroy_context() |