binary.py 文件源码

def to_binary_adaptive(img):

    sigma = 1.0
    m = max(img.shape)
    if m > 2000:
        block_size = 80
    elif m > 1500:
        block_size = 50
    elif m > 1000:
        block_size = 35
    else:
        block_size = 20

    bimg = gaussian_filter(img, sigma=sigma)
    bimg = threshold_adaptive(bimg, block_size, offset=2 / 255)
    bimg = np.array(bimg, 'uint8') * 255
    return bimg