Python bindings for OpenCV with AttributeError: 'module' object has no attribute 'FeatureDetector_create'

python opencv computer-vision surf object-detection
pevogam picture pevogam · Feb 1, 2013 · Viewed 10.2k times · Source

I am using the python bindings for OpenCV 2.4.X and OpenCV 3.1 but with the following simple two-liner

import cv2
detector = cv2.FeatureDetector_create("SURF")

I get the following output:

Traceback (most recent call last):
   File "version_test.py", line 3, in <module>
    detector = cv2.FeatureDetector_create("SURF")
AttributeError: 'module' object has no attribute 'FeatureDetector_create'

What are the reasons for this error in each version?

Answer

pevogam picture pevogam · Feb 1, 2017

It seemed that I need opencv-devel and opencv-debuginfo (rpm/deb) packages as well for the 2.4.X version.

Regarding the 3.1 version, these functions have been removed in favor of functions like

detector = cv2.TYPE_create()

where TYPE can be ORB or other detector of your choosing but not SURF and SIFT which have been moved to a nonfree package. For more info check this source.

Related questions

Simple Digit Recognition OCR in OpenCV-Python

I am trying to implement a "Digit Recognition OCR" in OpenCV-Python (cv2). It is just for learning purposes. I would like to learn both KNearest and SVM features in OpenCV. I have 100 samples (i.e. images) of each digit. I …

Read More
How to draw a rectangle around a region of interest in python

I'm having trouble with import cv in my python code. My issue is I need to draw a rectangle around regions of interest in an image. How can this be done in python? I'm doing object detection and would like …

Read More
Converting an OpenCV Image to Black and White

How do you convert a grayscale OpenCV image to black and white? I see a similar question has already been asked, but I'm using OpenCV 2.3, and the proposed solution no longer seems to work. I'm trying to convert a greyscale …

Read More