slice_image: Slice an image into tiles for scoring with a Keras model
In treysp/coolit: Identify water cooling towers from aerial orthoimagery

Slice an image into tiles for scoring with a Keras model

slice_image(img_object, img_path, slice_n_rows, slice_n_cols,
  slice_overlap_px = 0, complete_image = FALSE,
  img_xml_wkt_path = NULL, wkt_string = NULL, proj4_string = NULL,
  reproject_raster = FALSE, return_sf = FALSE, verbose = FALSE)

`img_object`	Image object that can be read by `brick`.
`img_path`	Path to image file that can be read by `brick`. Overridden by 'img_object'.
`slice_n_rows`	Number of rows in each tile. See `calc_slice_corners`. Required.
`slice_n_cols`	Number of columns in each tile. See `calc_slice_corners`. Required.
`slice_overlap_px`	Number of pixel overlap in adjacent tiles (in both X and Y directions). See `calc_slice_corners`.
`complete_image`	If TRUE and the tile size and overlap dimensions do not conform to covering the entire source raster/image, an additional row and column of tiles will be created that include the excluded pixels but do NOT respect the overlap value. If FALSE and the dimensions do not conform, the set of tiles will omit some pixels on the right and bottom side of the source raster/image. See `calc_slice_corners`.
`img_xml_wkt_path`	Optional path to .xml file containing metadata about image in WKT format.
`wkt_string`	Optional WKT string containing image projection information. Overridden by 'img_xml_wkt_path' if present.
`proj4_string`	Optional proj4 string containing image projection information. Overridden by 'img_xml_wkt_path' of 'wkt_string' if present.
`reproject_raster`	Should raster be re-projected to projection specified in 'img_xml_wkt_path', 'wkt_string', or 'proj4_string'?
`return_sf`	Should output data frame be an sf object (default regular data frame)?
`verbose`	Should messages about current step being processes be printed to screen?

Data frame with one row for each tile, containing: - img_path - img_xml_wkt_path (if present) - Numeric tile ID number - Tile corner cells in source pixel values - List-column containing each tile's extent based on the source jp2's projected raster - sf geometry column containing each tile's sf polygon - List-column containing tile's RGB layers in a 4d array of dimension [1, slice_n_cols, slice_n_rows, 3]

treysp/coolit documentation built on June 5, 2019, 5:16 p.m.