yuv420sp转jpg

代码功能：将yuv420sp（NV12）数据转换成jpg图片
需要注意：文件名需包含图片宽高信息，如 ‘00001_1920_1080.yuv420sp’

import os
import cv2
import numpy as np
from tqdm import tqdmdef yuv420sp2bgr(path, w, h):yuv = np.zeros((h, w, 3), dtype=np.uint8)u = np.zeros((int(h / 2), int(w / 2)), dtype=np.uint8)v = np.zeros((int(h / 2), int(w / 2)), dtype=np.uint8)with open(path, 'rb') as f:for row in range(h):for col in range(w):yuv[row, col, 0] = int(f.read(1).hex(), 16)for row in range(int(h / 2)):for col in range(int(w / 2)):u[row, col] = int(f.read(1).hex(), 16)v[row, col] = int(f.read(1).hex(), 16)yuv[:, :, 1] = cv2.resize(u, (w, h))yuv[:, :, 2] = cv2.resize(v, (w, h))bgr = cv2.cvtColor(yuv, cv2.COLOR_YUV2BGR)return bgr# yuv420sp文件名需包含图片宽高信息，如 '00001_1920_1080.yuv420sp'
# yuv420sp文件是yuv420图像存储格式的数据位: yyyyyy...uvuv..
path_yuv420sp = r'/media/fang/3441-913C/tsr/img'  # yuv420sp文件路径
path_output = path_yuv420sp  # jpg图片输出路径，不要有中文for root, dirs, files in os.walk(path_yuv420sp):for file in tqdm(files):if file.split(".")[-1] == 'yuv420sp':w, h = int(file.split(".")[0].split('_')[-2]), int(file.split(".")[0].split('_')[-1])bgr = yuv420sp2bgr(root + '/' + file, w, h)cv2.imwrite(path_output + '/' + file.replace('yuv420sp', 'jpg'), bgr)

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