simply plot float matrices with OpenCV

cvHelpers.py

import numpy as np
import cv2

class cvWindows:
    def __init__(self):
        self.windowlist = []
        
    def imshow(self, name, mat):
        cv2.namedWindow(name, cv2.WINDOW_NORMAL | cv2.WINDOW_GUI_EXPANDED)
        cv2.imshow(name, mat)
        self.windowlist.append(name)
        
    def imshowAutoScale(self, name, mat):
        print(f"cvWindows.imshowAutoScale: {np.min(mat)=} {np.max(mat)=}")
        tmp = mat-np.min(mat)
        tmp /= np.max(tmp)
        self.imshow(name, tmp)
        
    def waitAndDestroy(self):
        while True:
            if cv2.waitKey(100)==27:
                break
            if any( cv2.getWindowProperty(name,cv2.WND_PROP_VISIBLE)<1 for name in self.windowlist):
                break
        cv2.destroyAllWindows()