Methods and apparatus to identify components from images of components are disclosed. An example method includes generating first keypoint signatures of an object from at least one image of the object and identifying the object using the first keypoint signatures. Identifying the object comprises: comparing the first keypoint signatures to assembly reference keypoint signatures at a first level in a hierarchical database, the assembly reference keypoint signatures comprising keypoint signatures of multiple views of assemblies containing sets of components; and based on the comparison of the first keypoint signatures to the assembly reference keypoint signatures, comparing the first keypoint signatures to component keypoint signatures at a second level in a hierarchical database lower than the first level, the component reference keypoint signatures comprising keypoint signatures of the components.