A method, system, computer-readable medium and data structure are provided for processing image data in connection with image recognition. A response of an image (FIG. 6 element 210) to a basis tensor can be determined after the image is applied thereto. The image response can be flattened (FIG. 6 element 220). A coefficient vector may be extracted from the image response (FIG. 6 element 230). The extracted coefficient vector may be compared to a plurality of different parameters stored in coefficient rows of a matrix (FIG. 6 element 240).