spark_read_image: Read image data into a Spark DataFrame.

In sparklyr: R Interface to Apache Spark

Read image data into a Spark DataFrame.

Description

Read image files within a directory and convert each file into a record within the resulting Spark dataframe. The output will be a Spark dataframe consisting of struct types containing the following attributes:

• origin: StringType

• height: IntegerType

• width: IntegerType

• nChannels: IntegerType

• mode: IntegerType

• data: BinaryType

Usage

spark_read_image(
  sc,
  name = NULL,
  dir = name,
  drop_invalid = TRUE,
  repartition = 0,
  memory = TRUE,
  overwrite = TRUE
)

Arguments

sc	A spark_connection.
name	The name to assign to the newly generated table.
dir	Directory to read binary files from.
drop_invalid	Whether to drop files that are not valid images from the result (default: TRUE).
repartition	The number of partitions used to distribute the generated table. Use 0 (the default) to avoid partitioning.
memory	Boolean; should the data be loaded eagerly into memory? (That is, should the table be cached?)
overwrite	Boolean; overwrite the table with the given name if it already exists?

See Also

Other Spark serialization routines: collect_from_rds(), spark_insert_table(), spark_load_table(), spark_read(), spark_read_avro(), spark_read_binary(), spark_read_csv(), spark_read_delta(), spark_read_jdbc(), spark_read_json(), spark_read_libsvm(), spark_read_orc(), spark_read_parquet(), spark_read_source(), spark_read_table(), spark_read_text(), spark_save_table(), spark_write_avro(), spark_write_csv(), spark_write_delta(), spark_write_jdbc(), spark_write_json(), spark_write_orc(), spark_write_parquet(), spark_write_source(), spark_write_table(), spark_write_text()

sparklyr documentation built on May 29, 2024, 2:58 a.m.