Merge branch 'rcam2-main-patch-34541' into 'main'

Update README.md

See merge request rcam2/feature_extractors!1

README.md

 # feature_extractors
 
 
+sacre_coeur folder has 100 images.
 
-## Getting started
+utilities.py has save_h5 and load_h5 functions to save and record the features/descriptors/matches.
 
-To make it easy for you to get started with GitLab, here's a list of recommended next steps.
+keypoints_sacre_coeur_sift.h5
 
-Already a pro? Just edit this README.md and make it your own. Want to make it easy? [Use the template at the bottom](#editing-this-readme)!
+SIFT keypoints of sacre_coeur images. Load it using load_h5 function. Get the keys with: all_image_names = list(kp_sift.keys()).
+Keys are the names of the images. The coordinates of the keypoints are the values in this dictionary.
 
-## Add your files
+descriptors_sacre_coeur_sift.h5
 
-- [ ] [Create](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#create-a-file) or [upload](https://docs.gitlab.com/ee/user/project/repository/web_editor.html#upload-a-file) files
-- [ ] [Add files using the command line](https://docs.gitlab.com/ee/gitlab-basics/add-file.html#add-a-file-using-the-command-line) or push an existing Git repository with the following command:
+SIFT descriptors of the sacre_coeur images. Similar construction with the keypoints dictionary.
 
-```
-cd existing_repo
-git remote add origin https://gitlab.engr.illinois.edu/rcam2/feature_extractors.git
-git branch -M main
-git push -uf origin main
-```
+sacre_coeur_sift_2048_ratio_0.7.h5
 
-## Integrate with your tools
-
-- [ ] [Set up project integrations](https://gitlab.engr.illinois.edu/rcam2/feature_extractors/-/settings/integrations)
-
-## Collaborate with your team
-
-- [ ] [Invite team members and collaborators](https://docs.gitlab.com/ee/user/project/members/)
-- [ ] [Create a new merge request](https://docs.gitlab.com/ee/user/project/merge_requests/creating_merge_requests.html)
-- [ ] [Automatically close issues from merge requests](https://docs.gitlab.com/ee/user/project/issues/managing_issues.html#closing-issues-automatically)
-- [ ] [Enable merge request approvals](https://docs.gitlab.com/ee/user/project/merge_requests/approvals/)
-- [ ] [Automatically merge when pipeline succeeds](https://docs.gitlab.com/ee/user/project/merge_requests/merge_when_pipeline_succeeds.html)
-
-## Test and Deploy
-
-Use the built-in continuous integration in GitLab.
-
-- [ ] [Get started with GitLab CI/CD](https://docs.gitlab.com/ee/ci/quick_start/index.html)
-- [ ] [Analyze your code for known vulnerabilities with Static Application Security Testing(SAST)](https://docs.gitlab.com/ee/user/application_security/sast/)
-- [ ] [Deploy to Kubernetes, Amazon EC2, or Amazon ECS using Auto Deploy](https://docs.gitlab.com/ee/topics/autodevops/requirements.html)
-- [ ] [Use pull-based deployments for improved Kubernetes management](https://docs.gitlab.com/ee/user/clusters/agent/)
-- [ ] [Set up protected environments](https://docs.gitlab.com/ee/ci/environments/protected_environments.html)
-
-***
-
-# Editing this README
-
-When you're ready to make this README your own, just edit this file and use the handy template below (or feel free to structure it however you want - this is just a starting point!). Thank you to [makeareadme.com](https://www.makeareadme.com/) for this template.
-
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+This is the brute force matches of 2048 SIFT features with ratio test proposed by David Lowe. Keys of this dictionary are constructed as "image1_image2". Values are the indices of matched keypoints. First column is the indices for the first image. Second column is the indices for the second image.