concepts.gui.opencv.simple_text_visualizer.CV2SimpleTextVisualizer

class CV2SimpleTextVisualizer

Bases: object

A simple visualizer for text. The class should be initialized with a callback function, which takes the image and the mouse position as input, and returns the text to be displayed. The visualizer will display the image and the text.

Example

def callback(image, x, y):
    return f'Pixel value: {image[y, x]} (x={x}, y={y})'

visualizer = SimpleTextVisualizer(callback)
visualizer.run(image)

Methods

on_mouse_event(event, x, y, flags, param)
run(image)

Attributes

title	The title of the window.
image	The image currently being displayed.

__init__(callback, title=None, font=cv2.FONT_HERSHEY_SIMPLEX, font_scale=1, font_thickness=2)

Initialize the visualizer.

Parameters:

• callback – the callback function.

• title (str | None) – the title of the window.

• font (int) – the font of the text.

• font_scale (int) – the scale of the font.

• font_thickness (int) – the thickness of the font.

__new__(**kwargs)

on_mouse_event(event, x, y, flags, param)

run(image)

Parameters:

image (ndarray)

image: ndarray | None

The image currently being displayed.

title: str

The title of the window.