applies the function f to the list of channel values for each pixel of the image stored in and stores the result in .
- ImageFileApply can be used to read, process, and write successive blocks of data from a very large image file whose size could exceed available memory.
- ImageFileApply[f,"inputfile"] stores the result of an image file in the working directory where the output file name is the concatenation of and the result of DateString.
- ImageFileApply works with TIFF, JPEG, and PNG files. The created always has the same file format, data type, and dimensions as .
- ImageFileApply works on images with any number of channels.
- The function f should always return a number or a list of any length.
- The channel values supplied to f are normally in the range 0 to 1, regardless of the underlying type used in the Image object. The function f is assumed to return channel values that are normally in the range 0 to 1.
- The following options can be given:
Interleaving True whether to supply f lists of channel values Method Automatic method to use
- The following suboptions can be given to Method:
"ImageList" All frames to process from a multi-frame file "MaxBlockSize" 8000000 maximal size of image blocks in pixels loaded into the memory
- For the most efficient file processing, stripes or tiles of the image may be accessed in a specific order.
- The value of the option may be exceeded if it is smaller than the smallest block supported for the input file.
- With , the output image only contains the processed frames.
Introduced in 2012
(9.0)| Updated in 2015