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Blocked Images

Read and navigate very large images

A very large image may not fit into memory, which makes it challenging to display and process. The blockedImage object solves this problem by representing an image as a collection of smaller blocks of data that can be independently loaded and processed. A blockedImage object can support large images with one or multiple resolution levels.

Functions

blockedImageImage made from discrete blocks
blockedImageDatastoreDatastore for use with blocks from blockedImage objects
blockLocationSetList of block locations in large images
selectBlockLocationsSelect blocks from blocked images
bigimageshowDisplay 2-D blockedImage object
showmaskShow mask overlay at specified inclusion threshold
showlabelsDisplay label overlay on bigimageshow object
applyProcess blocks of blocked image
polyToBlockedImageCreate labeled blockedImage object from set of ROIs

Topics

Set Up Spatial Referencing for Blocked Images

This example shows how to set up and verify the spatial referencing information of a blockedImage object.

Read Whole-slide Images with Custom Blocked Image Adapter

This example shows how to add support for reading whole-slide images by creating a custom blocked image adapter.

Label Large Images in the Image Labeler (Computer Vision Toolbox)

This section describes the differences with using the Image Labeler app with blocked images.

Featured Examples