2021-08-30AttributeError: ‘module‘ object has no attribute ‘xfeatures2d‘

环境

ubuntu18.04+opencv3.2.0

在运行代码过程中缺少contrib模块,报错

Traceback (most recent call last):
  File "flann_match_locate.py", line 33, in <module>
    sift = cv2.xfeatures2d.SIFT_create()
AttributeError: 'module' object has no attribute 'xfeatures2d'

在网上搜索解决办法,如下

pip install opencv-contrib-python==3.3.0.10

显示:
ERROR: Could not find a version that satisfies the requirement opencv-contrib-python3.3.0.10 (from versions: none)
ERROR: No matching distribution found for opencv-contrib-python
3.3.0.10

解决办法

试了很多网上的办法,都行不通。
自己尝试了一下以下方法,可行。

打开网址:

https://pypi.org/project/opencv-contrib-python/#history

在这里插入图片描述

选择自己需要的contrib版本,点击Download files进行下载;
在这里插入图片描述终端运行:
pip install opencv-contrib-python… .whl文件

续:

回家后在个人电脑上尝试装了一下,发现很简单就装上了。
笔记本上是周末新装的ubuntu18.04
终端输入:

pip3 install opencv-python==3.4.2.16 -i https://pypi.tuna.tsinghua.edu.cn/simple/

然后:

pip3 install opencv-contrib-python==3.4.2.16 -i https://pypi.tuna.tsinghua.edu.cn/simple/

直接就安装成功了,可能还是受到环境配置的影响吧。
最后放一张测试contrib模块的匹配图,用了SURF。
在这里插入图片描述

引用\[1\]:It appears the new module is installed correctly. I'm able to import cv2 in both Python versions. However neither recognise the new features the module is supposed to add. >>> cv2.SURF() Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'module' object has no attribute 'SURF' >>> cv2.xfeatures2d.SURF() Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'module' object has no attribute 'xfeatures2d' python opencv share improve this question editedSep 27 '14 at 12:20 asked Sep 26 '14 at 12:04 Robbert 3,158 3 24 37 Could you consider editing the original Question since the answer does not reflect the question in the title.– Elliot Woods Mar 2 '17 at 6:08 add a comment 4 Answers active oldest votes up vote 15 down vote accepted 。 引用\[2\]:I encountered this same issue. I'm using python 2.7.6 and OpenCv 3.0 with the additional non-free modules. I do have xfeatures2d present in available modules and can import it, however it was as though xfeatures2d didn't contain SIFT or SURF. No matter how I called them it was the same Error: 。 引用\[3\]:在使用python版的OpenCV进行特征提取时出现"AttributeError: module ‘cv2.cv2’ has no attributexfeatures2d_SIFT’ "错误 通过网上寻找解决方法,发现是当前opencv版本(4.5)不能使用sift、surf等特征匹配算法。后面使用opencv3.4.2.16和python3.7成功运行了,运行效果如下图所示。 。 问题: AttributeError: module 'cv2' has no attribute 'FREAK_create' 回答: 这个错误通常是由于OpenCV版本的问题引起的。根据引用\[3\]中的描述,当前版本的OpenCV(4.5)不支持FREAK_create等特征匹配算法。建议尝试使用较早版本的OpenCV,如OpenCV 3.4.2.16,并确保与Python 3.7兼容,以解决这个问题。 #### 引用[.reference_title] - *1* *2* [https://stackoverflow.com/questions/26059134/adding-modules-from-opencv-contrib-to-opencv](https://blog.youkuaiyun.com/u011854789/article/details/79556022)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item] - *3* [( pythonOpenCV特征匹配函数错误cv2.xfeatures2d_SURF.create()](https://blog.youkuaiyun.com/qq_44924694/article/details/126162476)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item] [ .reference_list ]
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