brisk

I have a bootstrap checkbox the problem is I can't get the value of it when it is checked. The code below is my check box.

It's not entirely clear from the documentation, but I can see that BertTokenizer is initialised with pad_token='[PAD]', so I assume when you encode with add_special_tokens=True then it would automatically pad it. Given that pad_token_id=0, I can't see any 0s in the token_ids however:

I just discovered that SIFT writes the Octave as packed value (octave, layer and scale).
I need this value unpacked since I have to use SIFT detector in combination with other descriptors (ORB, BRIEF, SURF, BRISK). Here you can find a similar question.
I already tried different solutions (see code below) but none seems to work in python (this one as well).
Any suggestion?

I have a program that takes for input a picture, and who's objective is to determine if a certain object (essentially an image) is contained with this picture. If so it tries to estimate it's position. This works really well when the object is in the picture. However I get a lot of false positives when I put anything complex enough in the picture.

I was wondering if there is any good way to filter out these false positives. Hopefully something not too computationally expensive.

My program is based on the tutorial found here. Except I use BRISK instead of SURF so I don't need the contrib stuff.

HOW I GET MATCHES

I'm saving my KeyPoints and Descriptors in a JSON file. Later when I retrieve them, I am trying to use them in a FlannBasedMatcher. However, I think something is going wrong in the conversion because I am getting the following error.

I would like to cache KeyPoint in a JSON file and then retrieve them later for use in a FlannBasedMatcher. Is there a way to convert the KeyPoint to something like an array of strings or floats that could be stored and then retreived from a JSON file? I think this should be ok for the descriptors since they just look like an array of ints.

COMPUTING KEYPOINTs

I'd like to compare ORB, SIFT, BRISK, AKAZE, etc. to find which works best for my specific image set. I'm interested in the final alignment of images.

Is there a standard way to do it?

I'm considering this solution: take each algorithm, extract the features, compute the homography and transform the image.

Now I need to check which transformed image is closer to the target template.

Maybe I can repeat the process with the target template and the transformed image and look for the homography matrix closest to the identity but I'm not sure how to compute this closeness exactly. And I'm not sure which algorithm should I use for this check, I suppose a fixed one.

Or I could do some pixel level comparison between the images using a perceptual difference hash (dHash). But I suspect the the following hamming distance may not be very good for images that will be nearly identical.

I could blur them and do a simple subtraction but sounds quite weak.

Thanks for any suggestions.

EDIT: I have thousands of images to test. These are real world pictures. Images are of documents of different kinds, some with a lot of graphics, others mostly geometrical. I have about 30 different templates. I suspect different templates works best with different algorithms (I know in advance the template so I could pick the best one).

Right now I use cv2.matchTemplate to find some reference patches in the transformed images and I compare their locations to the reference ones. It works but I'd like to improve over this.

I am using the Hamming Distance to compute the difference among two keypoints descriptors obtained by the BRISK descriptor from opencv. I follow the suggestion of opencv documentation and use cv2.NORM_HAMMING while computing the distance as follows:

I am having troubles in adding images to my adventure game. I am doing this for school. I got the information down, but I am stuck in trying to add specific images so they can show up once I press the button to progress the story. Sorry if how I describe my problem comes across confusing...

The code shows up fine. All I want to do is add some images to my game.

Here's a link to the code, and here's the script within the HTML. I am not sure if I am doing it right.

EDIT:: (UPDATED LINK TO JSFIDDLE)

fiddle