最新opencv cv2.imdecode返回的是RGB，不是BGR，operators.py里的DecodeImage多转了一次

[zzk2021]

🔎 Search before asking

• I have searched the PaddleOCR Docs and found no similar bug report.
• I have searched the PaddleOCR Issues and found no similar bug report.
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🐛 Bug (问题描述)

导致推理结果不一致

🏃‍♂️ Environment (运行环境)

windows10

🌰 Minimal Reproducible Example (最小可复现问题的Demo)

原图

通道逆置后之后就这样了

[zzk2021]

class DecodeImage(object):
"""decode image"""

def __init__(
    self, img_mode="RGB", channel_first=False, ignore_orientation=False, new_load=True,**kwargs
):
    self.img_mode = img_mode
    self.channel_first = channel_first
    self.ignore_orientation = ignore_orientation
    self.new_load = new_load
def __call__(self, data):
    img = data["image"]
    if self.new_load:
        np_arr = np.frombuffer(img, dtype=np.uint8)
        img = cv2.imdecode(np_arr, cv2.IMREAD_UNCHANGED)
        data["image"] = img
        return data
    
    if six.PY2:
        assert (
            type(img) is str and len(img) > 0
        ), "invalid input 'img' in DecodeImage"
    else:
        assert (
            type(img) is bytes and len(img) > 0
        ), "invalid input 'img' in DecodeImage"
    img = np.frombuffer(img, dtype="uint8")
    if self.ignore_orientation:
        img = cv2.imdecode(img, cv2.IMREAD_IGNORE_ORIENTATION | cv2.IMREAD_COLOR)
    else:
        img = cv2.imdecode(img, 1)
    if img is None:
        return None
    if self.img_mode == "GRAY":
        img = cv2.cvtColor(img, cv2.COLOR_GRAY2BGR)
    elif self.img_mode == "RGB":
        assert img.shape[2] == 3, "invalid shape of image[%s]" % (img.shape)
        img = img[:, :, ::-1]

    if self.channel_first:
        img = img.transpose((2, 0, 1))

    data["image"] = img
    return data

new_load是我加的，只有走new_load才是正常的

[jingsongliujing]

你好，能否提个pr修复此问题

[GreatV]

https://docs.opencv.org/4.10.0/d4/da8/group__imgcodecs.html#gaad518fe65098fd32446bd5b9c4f8b531 OpenCV文档里写的写BGR

[zzk2021]

https://docs.opencv.org/4.10.0/d4/da8/group__imgcodecs.html#gaad518fe65098fd32446bd5b9c4f8b531 OpenCV文档里写的写BGR

那可能是我搞错了，cv2.imshow输入时BGR的。但是我们测试过程中，走这个DecodeImage以及paddleocr和不走DecodeImage直接调用paddleocr结果不一样，我们检查了分辨率等因素，最后确定是DecodeImage的问题。可能是其他地方没转