generate_11x11_ppm_for_lenslets

Author: Ismael Seidel Affiliation: Embedded Computing Lab (ECL), Federal University of Santa Catarina (UFSC)

Description:

This module renames PPM files to select a subset of the views and starts counting from view 000_000. This implementation is for JPEG Pleno CE 14.

get_lenslet_lf(name)[source]

Create a LightField object for a lenslet configuration (11x11 views).

Parameters:

name (str) – Light field name

Returns:

Light field object with lenslet specifications

Return type:

LightField

get_raw_lenslet_lf_ppm(name, raw_ppm_path)[source]

Create a raw light field data object for lenslet PPM files.

Parameters:

  • name (str) – Light field name

  • raw_ppm_path (str) – Path to the raw PPM files

Returns:

Raw light field data object

Return type:

RAWLightFieldData

load_paths_from_json(cfg_file)[source]

Load paths configuration from a JSON file.

Loads the raw_ppm_path, selected_ppm_path, and other paths from a JSON configuration file.

Parameters:

cfg_file (str) – Path to the JSON configuration file

Returns:

Dictionary containing paths from the JSON file

Return type:

dict

copy_and_rename_files(raw_ppm_path, selected_ppm_path, xxx, yyy, limit_xxx, limit_yyy)[source]

Copy and rename PPM files from source to destination with view indexing.

Copies files from raw_ppm_path to selected_ppm_path, renaming them from xxx_yyy.ppm to 000_000.ppm format, within the specified view limits.

Parameters:

  • raw_ppm_path (str) – Path to the raw source files

  • selected_ppm_path (str) – Path to the output folder

  • xxx (int) – Offset for the first view index dimension

  • yyy (int) – Offset for the second view index dimension

  • limit_xxx (int) – Maximum value for first dimension before stopping

  • limit_yyy (int) – Maximum value for second dimension before resetting

Returns:

None

Return type:

None

main()[source]

Generate 11x11 PPM files for lenslet light fields.

Processes lenslet light fields to extract and rename views into 11x11 grid format, starting from view 000_000. Performs validation by converting to YUV and comparing with previously generated YUV files.

Usage: python generate_11x11_ppm_for_lenslets.py <configuration.json>

Returns:

None

Return type:

None