isofit.utils.segment

Functions

segment_chunk(lstart, lend, in_file, nodata_value, ...)

Segment a small chunk of the image

segment(spectra, nodata_value, npca, segsize, nchunk)

Segment an image using SLIC on a PCA.

Module Contents

segment_chunk(lstart, lend, in_file, nodata_value, npca, segsize, logfile=None, loglevel='INFO')[source]

Segment a small chunk of the image

Parameters:

  • lstart – starting position in image file

  • lend – stopping position in image file

  • in_file – file path to segment

  • nodata_value – value to ignore

  • npca – number of pca components to use

  • segsize – mean segmentation size

  • logfile – logging file name

  • loglevel – logging level

Returns:

starting position in image file lend: stopping position in image file labels: labeled image chunk

Return type:

lstart

segment(spectra: tuple, nodata_value: float, npca: int, segsize: int, nchunk: int, n_cores: int = 1, ray_address: str = None, ray_redis_password: str = None, ray_temp_dir=None, ray_ip_head=None, logfile=None, loglevel='INFO')[source]

Segment an image using SLIC on a PCA.

Parameters:

  • spectra – tuple of filepaths of image to segment and (optionally) output label file

  • nodata_value – data to ignore in radiance image

  • npca – number of pca components to use

  • segsize – mean segmentation size

  • nchunk – size of each image chunk

  • n_cores – number of cores to use

  • ray_address – ray address to connect to (for multinode implementation)

  • ray_redis_password – ray password to use (for multinode implementation)

  • ray_temp_dir – ray temp directory to reference

  • ray_ip_head – ray ip head to reference (for multinode use)

  • logfile – logging file to output to

  • loglevel – logging level to use