US 9,547,908 B1 · Feature mask determination for images

Abstract

Implementations relate to feature mask determination for images. In some implementations, a computer-implemented method to determine a feature mask for an image includes estimating one or more prior regions in the image that define a feature in the image. The method determines superpixels based on multiple pixels of the image similar in color. The method constructs a graph, each node of the graph corresponding to a superpixel, and determines a superpixel score for each superpixel based on a number of pixels of the superpixel. The method determines one or more segmented regions in the image based on applying a graph cut technique to the graph based at least on the superpixel scores, and determines the feature mask based on the segmented regions. The feature mask indicates a degree to which pixels of the image depict the feature. The method modifies the image based on the feature mask.

Claims20

Dependent claims

A computer-implemented method to determine a feature mask for an image, the method comprising:

estimating one or more prior regions in the image, wherein the one or more prior regions approximately define a feature in the image;
determining a plurality of superpixels, wherein each superpixel is based on multiple pixels of the image that are similar in color;
constructing a graph, wherein each node of the graph corresponds to a superpixel of the plurality of superpixels;
determining a superpixel score associated with each of the plurality of superpixels, wherein the superpixel score is based at least on a number of pixels from which the associated superpixel is determined;
determining one or more segmented regions in the image based on applying a graph cut technique to the graph based at least on the superpixel scores;
determining the feature mask based on the one or more segmented regions, wherein the feature mask indicates a degree to which each of a plurality of pixels of the image depict the feature;
and
modifying the image based on the feature mask.

5 more elements

A system to determine a mask for at least a portion of a human body depicted in an image, the system comprising:

a storage device;
and
at least one processor operative to access the storage device and configured to:
estimate a head prior region in the image, wherein the head prior region defines a head feature portion in the image;
estimate a torso prior region in the image based on a location of the head feature portion and at least one orientation of the head feature portion;
determine one or more segmented regions based on the head prior region and the torso prior region;
determine a human body mask based on the one or more segmented regions, wherein the human body mask indicates a degree to which each of a plurality of pixels of the image depict the at least a portion of the human body;
and
modify one or more pixels in the image using the human body mask.

6 more elements

A non-transitory computer readable medium having stored thereon software instructions to determine a mask for an image that, when executed by a processor, cause the processor to perform operations including:

estimating a plurality of prior regions in the image, wherein each of the plurality of prior regions defines a portion of a feature in the image;
determining a plurality of color models including a foreground color model and a background color model respectively based on an associated one of the prior regions;
determining one or more segmented regions in the image including determining a foreground association of a plurality of pixels to a foreground region based on the associated foreground color model, and determining a background association of the plurality of pixels to a background region based on the associated background color model;
determining a feature mask based on the one or more segmented regions, wherein the feature mask indicates a degree to which each of a plurality of pixels of the image depict the feature;
and
modifying one or more pixels in the image using the feature mask.

3 more elements

Dependencies are inferred from the claim text.

Feature mask determination for images

Life of this patent

Feature mask determination for images

Life of this patent

Abstract

Claims20