Facial recognition using SURF

[akshitagupta15june]

SURF is another robust algortihm used for robust classification of 3d constructions.

We should try out this algorithm as well for recognising facial expressions

Reference : https://people.ee.ethz.ch/~timofter/publications/Knopp-ECCV-2010.pdf

[Preeti2095]

I want to work on this issue under gssoc'21.

[akshitagupta15june]

Ok assigning you

[Preeti2095]

I am getting an error on following code:-

gray=cv2.cvtcolor(img,cv2.COLOR BGR2GRAY)

error

Traceback (most recent call last) error: OpenCV(3.4.2) c: \miniconda3\conda-bld\opencv- suite 1533649848492\work\modules\imgproc\src\color.hpp:253: error: (-215:As sertion failed) vscn::contains(scn) && VDCN::contains(dcn) && VDepth : contains(depth) in function "cu::cvtHelperestruct ev::Set <3,4,-1), struct cv::Set<1,-1,-1), struct ev:Set<0,2,5>,2::cvtHelper

How to resolve this?

[akshitagupta15june]

it should be like this gray=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

[Preeti2095]

Nothing happened, same error. ![Uploading IMG_20210305_181917.jpg…]()

[akshitagupta15june]

have you added all modules which are required in this task.

[Preeti2095]

I have imported cv2 module and I have checked I have opencv and opencv_contrib both. Do I have to add something else also?

[akshitagupta15june]

you should add OpenCV-python

[akshitagupta15june]

are you taking any reference from somewhere?

[Preeti2095]

I saw a github issue same as mine but unable to figure it out how to solve. Can I share that github issue link?

[akshitagupta15june]

yes please share

[Preeti2095]

https://github.com/llSourcell/Object_Detection_demo_LIVE/issues/6

[akshitagupta15june]

yes so have you given the correct image name? or have you tried this use x = np.asarray(x, dtype=np.uint8) before do the conversion

[Preeti2095]

Yes image name is correct but didn't tried this solution. Let me do this and then I will come back to you.

[Preeti2095]

Nothing happened and my img is already in uint8... this didn't helped me and according to that github issue it said that all the img array values should be between 0-1 range and I have all 0-255 range. So that might be creating the problem and if so then I am unable to figure out how to do that.

[Preeti2095]

So for converting the range from 0-255 to 0-1, I divided the array with 255 but still no improvement.

[akshitagupta15june]

can you send me full code what you are writing

[Preeti2095]

import cv2 import matplotlib.pyplot as plt import numpy as np

img=cv2.imread('G:/butterfly.jpg',0) surf=cv2.xfeatures2d.SURF_create() gray=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

[Preeti2095]

I wrote the codes in wrong order that's why values were changing and cvtColor() was not taking the values correctly and hence the error. Correction:- np.uint8 line should come after imread () and then cvtColor() line. Now it is working. Thank you.

[akshitagupta15june]

Great you debugged it yourself well done!

[Preeti2095]

Thank you😊 and do I have only 1 week to submit the PR??

[Hamza3226]

Hello, I am a GSSOC'21 participant and would like to contribute to this project.

[Preeti2095]

I have created the surf project but I am not getting the desired result. What should I do? @akshitagupta15june