Tiled Spectrograms

[BryonLewis]

resolves #171

• Creates A script for debugging and generating tiled spectrograms
  • If a generated spectrogram is larger than 65000 pixels (bigger than JPEG supports) it will be split into multiple files using a {filename}.XX_of_XX.jpg format to indicate the order of the images
• Decided on creating a new model SpectrogramImage that has a generic foriegn key that will be used in Spectrogram, CompressedSpectrogram, NABatSpectrogram and NABatCompressedSpectrogram.
  • Spectrogram Image will store each recording images under /{recordingId}/{type}/image_{index}.jpg or similar to this
  • Removed Large Image Support by removing mixins and the installation of dependencies
  • Restructure ./task.py to utilize new /utils/spectrogram.py utility functions

TODO:

• Finalize the removal of the image_file from Spectrogram and CompressedSpectrogram
• Update all endpoints and relationships so they don't use image_file
• Update logic for spectrogram generation to utilize new /utils/spectrogram.py functions by using temporary directories
  • Spectrogram creation will be centralized
  • Prediction running is also centralized to this code
• Create a migration that will move any existing 'image_file' into a 'SpectrogramImage with the proper type and relationships
• Remove Base64 references (still needs some for processing APIToken)
• Remove Colormap references
• Test Migration (have base BatAI recordings and synthetic NABat Recordings)
  • Ensure the migration works to create new SpectrogramImage Elements
  • Check the Admin interface for these updated SpectrogramImages
• Test Spectrogram Creation
  • BatAI spectrogram creation
  • BatAI prediction
  • NABat spectrogram creation using apiToken
  • NaBat prediction
• Client needs to be updated to tile images side by side for the spectrograms that are created.
  • Update types for spectrograms
  • Update the rendering to tile images
  • Make sure the same functionality works for NABat

Split up PR:

• PR for django-large-image removal Remove django-large-image #202
• PR that removes tiled image support for client Remove Tile Server Support from Client #203
• PR that swaps from using url to urls[] and supports the client with arrays of images Client URL List Support #204
• PR for spectrogram.py utility functions Spectrogram Task Utils #206
• PR that moves from the image_file in the spectrogram and spectrogram_compressed to the SpectrogramImage Spectrogram Image Model #209
• Test new PRs by reverting migrations and checking that creation and loading of spectrograms works

[BryonLewis]

closing because all sub PR's based on this have been merged and reviewed.