| 摘要 |
A method of selecting a plurality of patches (e.g., 1040) within a region of a page (e.g., 1010), for use in image alignment, is disclosed. One or more candidate image alignment patches distributed across a region of the page are determined, based on content in the page region, each candidate patch being associated with a feature strength value. A distribution of grid nodes is applied to the page region, at least one attribute of the distribution of grid nodes being dynamically adjusted according to the distribution of the candidate patches across the page region. A corresponding patch from the distribution of candidate patches is selected for each of a plurality of the grid nodes, wherein each of the selected patches is selected based on proximity of the selected patch to a corresponding grid node.
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