繁体   English   中英

在OpenCV中运行神经网络时,如何解决“错误:(-215)pbBlob.raw_data_type()== caffe :: FLOAT16在函数blobFromProto中的问题”

[英]How to fix, “error: (-215) pbBlob.raw_data_type() == caffe::FLOAT16 in function blobFromProto” when running neural network in OpenCV

我目前正在尝试使用Nvidia DIGITS在自定义数据集上训练CNN以进行对象检测,最终我想在Nvidia Jetson TX2上运行该网络。 我按照推荐的说明从Docker下载了DIGITS映像,并且能够成功地以合理的精度训练网络。 但是,当我尝试使用OpenCv在python中运行网络时,出现此错误,

“错误:(-215)pbBlob.raw_data_type()==函数blobFromProto中的caffe :: FLOAT16”

我在其他一些线程中读到,这是由于DIGITS以与OpenCv的DNN功能不兼容的形式存储其网络。

在训练我的网络之前,我尝试过选择DIGITS中的选项,该选项应该使网络与其他软件兼容,但是似乎根本不会改变网络,并且在运行python脚本时出现相同的错误。 这是我运行的导致错误的脚本(它来自本教程https://www.pyimagesearch.com/2017/09/11/object-detection-with-deep-learning-and-opencv/

# import the necessary packages
import numpy as np
import argparse
import cv2

# construct the argument parse and parse the arguments
ap = argparse.ArgumentParser()
ap.add_argument("-i", "--image", required=True,
help="path to input image")
ap.add_argument("-p", "--prototxt", required=True,
help="path to Caffe 'deploy' prototxt file")
ap.add_argument("-m", "--model", required=True,
help="path to Caffe pre-trained model")
ap.add_argument("-c", "--confidence", type=float, default=0.2,
help="minimum probability to filter weak detections")
args = vars(ap.parse_args())

# initialize the list of class labels MobileNet SSD was trained to
# detect, then generate a set of bounding box colors for each class
CLASSES = ["dontcare", "HatchPanel"]
COLORS = np.random.uniform(0, 255, size=(len(CLASSES), 3))
# load our serialized model from disk
print("[INFO] loading model...")
net = cv2.dnn.readNetFromCaffe(args["prototxt"], args["model"])

# load the input image and construct an input blob for the image
# by resizing to a fixed 300x300 pixels and then normalizing it
# (note: normalization is done via the authors of the MobileNet SSD
# implementation)
image = cv2.imread(args["image"])
(h, w) = image.shape[:2]
blob = cv2.dnn.blobFromImage(cv2.resize(image, (300, 300)), 0.007843,
    (300, 300), 127.5)
# pass the blob through the network and obtain the detections and
# predictions
print("[INFO] computing object detections...")
net.setInput(blob)
detections = net.forward()

# loop over the detections
for i in np.arange(0, detections.shape[2]):
    # extract the confidence (i.e., probability) associated with the  
    # prediction
    confidence = detections[0, 0, i, 2]

    # filter out weak detections by ensuring the `confidence` is
    # greater than the minimum confidence
    if confidence > args["confidence"]:
        # extract the index of the class label from the `detections`,
        # then compute the (x, y)-coordinates of the bounding box for
        # the object
        idx = int(detections[0, 0, i, 1])
        box = detections[0, 0, i, 3:7] * np.array([w, h, w, h])
        (startX, startY, endX, endY) = box.astype("int")

        # display the prediction
        label = "{}: {:.2f}%".format(CLASSES[idx], confidence * 100)
        print("[INFO] {}".format(label))
        cv2.rectangle(image, (startX, startY), (endX, endY),
            COLORS[idx], 2)
        y = startY - 15 if startY - 15 > 15 else startY + 15
        cv2.putText(image, label, (startX, y),
            cv2.FONT_HERSHEY_SIMPLEX, 0.5, COLORS[idx], 2)
# show the output image
cv2.imshow("Output", image)
cv2.waitKey(0)

这应该输出在脚本调用中指定的图像,并在图像上方绘制神经网络的输出。 但是,脚本会因上述错误而崩溃。 我见过其他人也有同样的错误,但是到目前为止,还没有一个人提出与当前版本的DIGITS兼容的解决方案。

我的完整设置如下:

操作系统:Ubuntu 16.04

Nvidia DIGITS Docker映像版本:19.01-caffe

数字版本:6.1.1

Caffe版本:0.17.2

咖啡口味:Nvidia

OpenCV版本:4.0.0

Python版本:3.5

任何帮助深表感谢。

哈里森·麦金太尔,谢谢! 此PR对其进行了修复: https : //github.com/opencv/opencv/pull/13800 请注意,存在一个类型为“ ClusterDetections”的图层。 OpenCV不支持它,但是您可以使用自定义图层机制来实现它(请参阅教程

暂无
暂无

声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM