Object segmentation, including sky segmentation

In a digital medium environment in which a computing device can use an image processing application to perform object segmentation, one or more computer-readable storage media comprising instructions that are stored thereon that, responsive to execution by the computing device, perform operations comprising:

• receiving an input image that includes an object region to be segmented;
• processing the input image to provide a first segmentation that defines the object region, said processing comprising:
• parsing the input image to provide a probability mask which classifies individual pixels in the input image;
• determining multiple images from a database which have layouts at least similar to a layout of the input image, wherein the multiple images include respective masks
• processing the respective masks to provide a weighted average mask;
• and
• combining the probability mask and weighted average mask to provide the first segmentation.

A system implemented in a digital medium environment including a computing device having an image processing application to enable object segmentation, the system comprising:

• a processing system;
• one or more computer readable media storing instructions executable via the processing system to implement an image processing application configured to perform operations comprising:
• receiving an input image that includes an object region to be segmented;
• processing the input image to provide a segmentation that defines the object region, said processing comprising:
• parsing the input image to provide a probability mask which classifies individual pixels in the input image;
• determining, from a database, multiple images which have layouts at least similar to a layout of the input image, wherein the multiple images include respective masks;
• processing the respective masks to provide a weighted average mask;
• and
• combining the probability mask and the weighted average mask to provide the segmentation.