CTC计算出来的loss非常大，大于60的loss, 不知道哪里出了问题

[ShangLe0607]

你好，请教一下，我运行create_lmdb_dataset.py出现not a valid image

戴志 /opt/crnn/images/9998.png is not a valid image /opt/crnn/images/9999.png 窦君晶 /opt/crnn/images/9999.png is not a valid image Created dataset with 0 samples 请问这是什么原因呢

[joeqincai]

说明这个图片没有读进来，你换其它格式的图片试试看------------------ 原始邮件 ------------------ 发件人: "ShangLe0607"notifications@github.com 发送时间: 2019年10月15日(星期二) 下午5:53 收件人: "AstarLight/Lets_OCR"Lets_OCR@noreply.github.com; 抄送: "joeqincai"827173695@qq.com;"Author"author@noreply.github.com; 主题: Re: [AstarLight/Lets_OCR] CTC计算出来的loss非常大，大于60的loss, 不知道哪里出了问题 (#72)

你好，请教一下，我运行create_lmdb_dataset.py出现not a valid image

戴志 /opt/crnn/images/9998.png is not a valid image /opt/crnn/images/9999.png 窦君晶 /opt/crnn/images/9999.png is not a valid image Created dataset with 0 samples 请问这是什么原因呢

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[ShangLe0607]

@joeqincai 谢谢您，但是我试了试jpg格式还是同样的结果---、not valid image

[joeqincai]

你使用绝对路径去读一张图片试一下，我采用的是lmdb保存图片路径的方式，而不是保存图片字符串来做的

[ShangLe0607]

@joeqincai 改成了这种保存全路径的方式，还是同样的结果

[joeqincai]

def getitem(self, index): assert index <= len(self), 'index range error' index += 1 with self.env.begin(write=False) as txn: img_key = 'image-%09d' % index imgbuf = txn.get(img_key.encode()) imgAbsPath = imgbuf.decode()

buf = six.BytesIO()

        # buf.write(imgbuf)
        # buf.seek(0)
        try:
            #img = Image.open(buf)
            img = Image.open(imgAbsPath).convert('L')
        except IOError:
            print('Corrupted image for %d' % index)
            return self[index + 1]
        if self.transform is not None:
            img = self.transform(img)
        label_key = 'label-%09d' % index
        label = txn.get(label_key.encode())
        if self.target_transform is not None:
            label = self.target_transform(label)
    return (img, label)

[joeqincai]

` def getitem(self, index): assert index <= len(self), 'index range error' index += 1 with self.env.begin(write=False) as txn: img_key = 'image-%09d' % index imgbuf = txn.get(img_key.encode()) imgAbsPath = imgbuf.decode()

buf = six.BytesIO()

        # buf.write(imgbuf)
        # buf.seek(0)
        try:
            #img = Image.open(buf)
            img = Image.open(imgAbsPath).convert('L')
        except IOError:
            print('Corrupted image for %d' % index)
            return self[index + 1]
        if self.transform is not None:
            img = self.transform(img)
        label_key = 'label-%09d' % index
        label = txn.get(label_key.encode())
        if self.target_transform is not None:
            label = self.target_transform(label)
    return (img, label)`

[joeqincai]

你需要先确定这个错误是在哪一句代码报错来的，然后再去尝试修复

[ShangLe0607]

我这个要得到test_lmdb和train_lmda的那个程序，结果是这样子，但确实能得到test_lmdb和train_lmda两个文件加,可是运行结果说是图片是无效，但整个程序并没有报错，

俞园翰 /opt/crnn/images/8996.jpg is not a valid image /opt/crnn/images/8997.jpg 邵娴 /opt/crnn/images/8997.jpg is not a valid image /opt/crnn/images/8998.jpg 苗茗 /opt/crnn/images/8998.jpg is not a valid image /opt/crnn/images/8999.jpg 云姣谦 /opt/crnn/images/8999.jpg is not a valid image Created dataset with 0 samples [root@localhost lib]#

[joeqincai]

1、你要用编译器单步调试跟进去去看，在哪一句话报了这个错误； 2、能生成lmdb文件并不代表生成的就是你想要的