per_image_evaluation.py: correct documentation of shapes

[chrisyeh96]

Description

The docstrings of several functions in per_image_evaluation.py had incorrect shape information for their inputs and/or outputs. Many of these mistakes have been corrected.

Type of change

For a new feature or function, please create an issue first to discuss it
with us before submitting a pull request.

Note: Please delete options that are not relevant.

• Documentation update

Tests

n/a

Test Configuration:

n/a

Checklist

• I have signed the Contributor License Agreement.
• I have read guidelines for pull request.
• My code follows the coding guidelines.
• I have performed a self code review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• [n/a] I have added tests that prove my fix is effective or that my feature works.

[chrisyeh96]

@tombstone @jaeyounkim Bump - any update on when this can be merged?