16位灰度图转RGB图

16位灰度图转RGB图

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import cv2
import numpy as np
from PIL import Image
def transfer_16bit_to_8bit(image_path):
    image_16bit=Image.open(image_path)
    img_array = np.array(image_16bit, dtype=np.uint16)
    min_16bit = np.min(img_array)
    max_16bit = np.max(img_array)
    image_8bit = np.array(np.rint(255 * ((image_16bit - min_16bit) / (max_16bit - min_16bit))), dtype=np.uint8)
    # colored_image=cv2.cvtColor(image_8bit,cv2.COLOR_GRAY2RGB)
    image= np.expand_dims(image_8bit, axis=2)
    colored_image = np.concatenate((image, image, image), axis=-1)  #-1则是最后一个维度
    # if colored_image.mode !="P":
    #     colored_image=colored_image.conver
    # cv2.imshow('8bit',colored_image)
    # cv2.waitKey(0)
    return colored_image

image_path = r'D:\pic\2024demo03\pic\tif_backup\1.00kV_T1_5000×_03.tif'
colored_image=transfer_16bit_to_8bit(image_path)
cv2.imwrite(r"D:\pic\2024demo03\pic\tif_3channels\03.PNG",colored_image)