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Large Image Files

Read and navigate very large images

A very large image might not load in Image Viewer, or if the image does load, zooming and panning can be slow. In either case, creating a reduced resolution data set (R-Set) can improve performance. Use the Image Viewer to navigate an R-Set image the same way you navigate a standard image.


ImageAdapter Interface for image I/O


isrset Check if file is R-Set
openrset Open R-Set file
rsetwrite Create reduced resolution data set from image file


Create a Reduced Resolution File

To create a reduced resolution file, use the rsetwrite function.

Open a Reduced Resolution File

To open a reduced resolution file, use the imtool function.

Block Size and Performance

Block size and the number of times the file is accessed can significantly affect performance when using theblockproc function to read or write image files.

Read and Write Data in Unsupported Formats Using blockproc

To work with image data in file formats not supported by the blockproc function, construct a class that inherits from theImageAdapter class.

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