import cv2 as cv

def h_e(image_path):
    # 图像以灰度图输入
    X = cv.imread(image_path, 0)

    # 图像放缩
    src = cv.resize(X, (256, 256))

    # 图像的直方图
    hist = cv.calcHist([src], [0], None, [256], [0, 255])

    # 灰度图均衡化
    equ = cv.equalizeHist(src)

    cv.imshow('result', equ)

    cv.waitKey(0)

    cv.destroyAllWindows()