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Segmentación de imágenes

Segmente imágenes

La segmentación de imágenes es el proceso de dividir una imagen en partes o regiones. A menudo, la división en partes se basa en las características de los píxeles de la imagen. Por ejemplo, una forma de encontrar regiones en una imagen es buscar discontinuidades abruptas en los valores de los píxeles, lo que suele indicar la presencia de bordes. Estos bordes pueden definir regiones. En otros métodos, la imagen se divide en regiones en función de los valores de color o de la textura.

Apps

Color Thresholder	Umbrales de imágenes en color
Image Segmenter	Segmentar una imagen mejorando las regiones
Volume Segmenter	Segment 3-D grayscale or RGB volumetric images

Funciones

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Técnicas de segmentación

`graythresh`	Umbral de imagen global usando el método de Otsu
`multithresh`	Multilevel image thresholds using Otsu’s method
`otsuthresh`	Umbral de histograma global usando el método de Otsu
`adaptthresh`	Umbral adaptativo de la imagen utilizando estadísticas locales de primer orden
`grayconnected`	Select contiguous image region with similar gray values using flood-fill technique
`watershed`	Transformada de watershed
`activecontour`	Segment image into foreground and background using active contours (snakes) region growing technique
`lazysnapping`	Segment image into foreground and background using graph-based segmentation
`grabcut`	Segment image into foreground and background using iterative graph-based segmentation
`imseggeodesic`	Segment image into two or three regions using geodesic distance-based color segmentation
`imsegfmm`	Binary image segmentation using fast marching method
`gradientweight`	Calculate weights for image pixels based on image gradient
`graydiffweight`	Calculate weights for image pixels based on grayscale intensity difference
`imsegkmeans`	K-means clustering based image segmentation
`imsegkmeans3`	K-means clustering based volume segmentation
`superpixels`	2-D superpixel oversegmentation of images
`superpixels3`	3-D superpixel oversegmentation of 3-D image

Mostrar resultados de la segmentación

`imoverlay`	Grabar una máscara binaria en una imagen 2D
`labeloverlay`	Superponer regiones de una matriz de etiquetas en una imagen 2D
`label2idx`	Convert label matrix to cell array of linear indices
`boundarymask`	Find region boundaries of segmentation

Evaluar la precisión de la segmentación

`jaccard`	Jaccard similarity coefficient for image segmentation
`dice`	Sørensen-Dice similarity coefficient for image segmentation
`bfscore`	Contour matching score for image segmentation

Temas

Segmentación mediante Image Segmenter

Getting Started with Image Segmenter App

Segment an image using different techniques, refine and save the binary mask, and export the segmentation code by using Image Segmenter.
Install Sample Data Using Add-On Explorer
Image Processing Toolbox Image Data package contains sample 3-D volumetric data.

Segmentación mediante Color Thresholder

Segment Image and Create Mask Using Color Thresholder App
Segment an image based on color values and create a binary mask image using Color Thresholder.
Acquire Live Images in the Color Thresholder App
You can perform color thresholding on an image acquired from a live USB webcam.
Image Segmentation Using Point Clouds in the Color Thresholder App
This example shows how to segment an image using the point cloud control in the Color Thresholder app.

Segmentación mediante filtros de Gabor, superpíxeles y otras técnicas

Plot Land Classification with Color Features and Superpixels
This example shows how to perform land type classification based on color features using K-means clustering and superpixels.
Segment Lungs from 3-D Chest Scan
This example shows how to perform a 3-D segmentation using active contours (snakes) and view the results using the Volume Viewer app.

Segmentación mediante Volume Segmenter

Create Binary Mask Using Volume Segmenter
This example shows how to segment a volume in the Volume Segmenter app.
Create Semantic Segmentation Using Volume Segmenter
This example shows how to create a semantic segmentation of a volume using the Volume Segmenter app.
Work with Blocked Images Using Volume Segmenter
This example shows how to work with a single-resolution blocked image in the Volume Segmenter app.

Ejemplos destacados

Texture Segmentation Using Gabor Filters

Use texture segmentation to identify regions based on their texture. The goal is to segment the dog from the bathroom floor. The segmentation is visually obvious because of the difference in texture between the regular, periodic pattern of the bathroom floor, and the regular, smooth texture of the dog's fur.

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