分块图像

读取和浏览大型图像和多分辨率图像

大型图像可能无法放入内存，这使得显示和处理此类图像变得很困难。blockedImage 对象通过将图像表示为可独立加载和处理的较小数据块的集合来解决此问题。blockedImage 对象可以支持大型图像和具有一个或多个分辨率级别的图像。

函数

`blockedImage`	Big or multiresolution image made from discrete blocks （自 R2021a 起）
`makeMultiLevel2D`	2-D multilevel blocked image （自 R2023a 起）
`makeMultiLevel3D`	3-D multilevel blocked image （自 R2023a 起）
`concatenateLevels`	Concatenate levels from multiple blocked images （自 R2023a 起）
`polyToBlockedImage`	Create labeled `blockedImage` object from set of ROIs （自 R2021b 起）

`blockLocationSet`	List of block locations in large images （自 R2020a 起）
`selectBlockLocations`	Select blocks from blocked images （自 R2020b 起）
`mergeBlockLocationSets`	Merge block location sets （自 R2023a 起）

`bigimageshow`	Display 2-D `blockedImage` object （自 R2019b 起）
`showmask`	Show mask overlay at specified inclusion threshold （自 R2019b 起）
`showlabels`	Display label overlay on `bigimageshow` object （自 R2021b 起）

`apply`	Process blocks of blocked image （自 R2021a 起）
`countEachLabel`	Counts number of pixel labels for each class （自 R2021a 起）
`crop`	Create cropped version of blocked image （自 R2021a 起）
`blockedImageDatastore`	Datastore for use with blocks from `blockedImage` objects （自 R2021a 起）

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.
Convert Image Labeler Polygons to Labeled Blocked Image for Semantic Segmentation
This example shows how to convert polygon labels stored in a groundTruth object into a labeled blocked image suitable for semantic segmentation workflows.
Work with Blocked Images Using Volume Segmenter
Segment a volumetric image that could be too large to fit into memory by converting the volume to a blocked image.