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BUILT-IN MATHEMATICA SYMBOL
ImageFileFilter
ImageFileFilter[f, "inputfile", r, "outputfile"]
applies the function f to the range r neighborhood of each pixel in each channel of the image stored in 
and stores the result in 
.
Details and Options
- ImageFileFilter can be used to read, process, and write successive blocks of data from a very large image file whose size could exceed available memory.
- ImageFileFilter[f, "inputfile", r] 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[]. - ImageFileFilter works with TIFF, JPEG, and PNG files. The created
always has the same file format, data type, and dimensions as the 
. - ImageFileFilter works on images with any number of channels.
- ImageFileFilter[f, "inputfile", r] replaces the value of each pixel by the result of applying the function f to the
×
array of values around that pixel. - ImageFileFilter[f, "inputfile", {rrow, rcol}] uses range
in the row direction, and 
in the column direction. - In ImageFileFilter[f, ...], the function f can 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.
- ImageFileFilter operates separately on each channel in an image.
- The following options can be given:
-
Interleaving False whether to supply f lists of channel values Padding "Fixed" what values to assume beyond the image "ImageList" All frames to process from a file with multiple images "MaxBlockSize" 8000000 maximal size of image blocks in pixels loaded into the memory - With the default setting Interleaving->False, the elements in the arrays to which f is applied are individual channel values for the pixels.
- 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. - Padding->None is not supported by ImageFileFilter.
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