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Imágenes divididas en bloques

Lea imágenes grandes y multirresolución y navegue por ellas

Una imagen grande podría no caber en la memoria disponible y, por lo tanto, ser difícil de mostrar y procesar. El objeto blockedImage ofrece una solución al problema: representa una imagen como un conjunto de bloques de datos más pequeños que pueden cargarse y procesarse de forma independiente. Un objeto blockedImage admite imágenes grandes con uno o varios niveles de resolución.

Funciones

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Crear imágenes divididas en bloques

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

Seleccionar bloques

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

Mostrar imágenes divididas en bloques

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

Procesar imágenes divididas en bloques

`apply`	Process blocks of blocked image (desde R2021a)
`countEachLabel`	Counts number of pixel labels for each class (desde R2021a)
`crop`	Crear la versión recortada de una imagen dividida en bloques (desde R2021a)
`blockedImageDatastore`	Datastore for use with blocks from `blockedImage` objects (desde R2021a)

Temas

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 OpenSlide
This example shows how to add support for reading whole-slide images by creating a custom blocked image adapter.
Explore Blocked Image Details with Interactive ROIs
This example shows how to display a detailed region of a blocked image selected interactively using ROI tools.
Warp Blocked Image at Coarse and Fine Resolution Levels
This example shows how to apply a geometric transformation (warping) to a blocked image.
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.

Ejemplos destacados

Process Blocked Images Efficiently Using Partial Images or Lower Resolutions

Process a blocked image quickly using two strategies that enable computations on smaller representative samples of the high-resolution image.

Abrir script en vivo

Process Blocked Images Efficiently Using Mask

Process a blocked image efficiently by using a mask to isolate regions of interest (ROIs).

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Create Labeled Blocked Image from ROIs and Masks

Create a labeled blocked image from a set of ROIs.

Abrir script en vivo

Detect and Count Cell Nuclei in Whole Slide Images

Use color thresholding and region property analysis, while working with small blocks of image data, to detect nuclei in WSIs.

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Preprocess Multiresolution Images for Training Classification Network

Prepare datastores that read and preprocess multiresolution whole slide images (WSIs) that might not fit in memory.

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Classify Tumors in Multiresolution Blocked Images

Classify multiresolution whole slide images (WSIs) that might not fit in memory using an Inception-v3 deep neural network.

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Process Large GeoTIFF File as Blocked Image

Efficiently apply and visualize image processing operations on a large GeoTIFF file using a low-resolution mask.

Crop and Mask Large GeoTIFF File Using Shapefile

Efficiently crop and mask a large GeoTIFF file using a shape from a shapefile.

Desde R2023b