15. The system of claim 9 , the operations comprising: generating a composite image using the first image and the second image based on the mapping between the predefined sub-region of the first image and the predefined sub-region of the second image.
9. A system comprising: one or more computers and one or more storage devices storing instructions that are operable, when executed by the one or more computers, to cause the one or more computers to perform operations comprising: for each of a first image of a first view of an object and a second image of a second view of the object, generating a respective feature point descriptor for each of multiple feature points included in the image; determining that a quantity of one or more of the feature point descriptors from the first image that are (i) indicated as similar to one or more feature point descriptors associated within a predefined sub-region of the second image, and (ii) associated within a corresponding predefined sub-region of the first image, satisfies a quantity threshold; and based on determining that a quantity of one or more of the feature point descriptors from the first image that are (i) indicated as similar to one or more feature point descriptors associated within a same predefined sub-region of the second image, and (ii) associated within a same predefined sub-region of the first image, satisfies a quantity threshold, creating a mapping between the predefined sub-region of the first image and the predefined sub-region of the second image.