BUILT-IN MATHEMATICA SYMBOL

ImageFileScan

ImageFileScan[f, "inputfile"]
applies the function f to the list of channel values for each pixel of the image stored in .

Details and Options Details and Options

ImageFileScan can be used to read and process successive pixel data from a very large image file whose size could exceed available memory.
The channel values supplied to f are normally in the range 0 to 1, regardless of the underlying type used in the Image object.
ImageFileScan[f, ...] discards the results of applying f to the pixels. Unlike ImageFileApply, ImageFileScan does not create a new file and returns Null.
ImageFileScan is useful in carrying out an operation on individual pixels where the operation has a "side effect", such as making an assignment.
ImageFileScan works with TIFF, JPEG, and PNG files.
ImageFileScan works on images with any number of channels.
ImageFileScan traverses the image in a row-wise order from left to right.
You can use Throw to exit from ImageFileScan. »
The following options can be given:

Interleaving	True	whether to supply f lists of channel values
"ImageList"	All	frames to process from a file with multiple images
"MaxBlockSize"	8000000	maximal size of image blocks in pixels loaded into the memory