added ability to merge 2 objects

[kolt-mcb]

Key Changes:
Mask Extraction and Validation:
The method iterates over a list of object IDs, retrieves their corresponding video-resolution masks from either conditioning or non-conditioning outputs, and converts them to binary masks. It includes error messages for cases where an object ID isn’t found or a mask is missing.

Mask Union Operation:
All valid binary masks are combined using a logical OR operation, effectively merging the individual masks into one.

State Update:
The merged mask is assigned to a representative object (the one with the smallest ID among those merged), and the remaining objects are removed from the inference state to avoid redundancy.

[facebook-github-bot]

Hi @kolt-mcb!

Thank you for your pull request and welcome to our community.

Action Required

In order to merge any pull request (code, docs, etc.), we require contributors to sign our Contributor License Agreement, and we don't seem to have one on file for you.

Process

In order for us to review and merge your suggested changes, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

Once the CLA is signed, our tooling will perform checks and validations. Afterwards, the pull request will be tagged with CLA signed. The tagging process may take up to 1 hour after signing. Please give it that time before contacting us about it.

If you have received this in error or have any questions, please contact us at [email protected]. Thanks!

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!