Systems and methods for identifying anomalous test item renderings

摘要

Systems and methods are provided for determining a test item rendering anomaly. A test item is provided to a first test item rendering system that is configured to generate a first graphical representation of the test item. The test item is provided to a second test item rendering system that is configured to generate a second graphical representation of the test item. A first digital pixel image of the first graphical representation is captured, and a second digital pixel image of the second graphical representation is captured. Pixels of the digital pixel images are processed, where the processing includes comparing the digital pixel images to determine an extent to which the second digital pixel image differs from the first digital pixel image. An indication for the test item is provided when the second digital pixel image differs from the first digital pixel image by more than a threshold amount.

主权项

1. A computer-implemented method of determining a test item rendering anomaly, comprising:
providing a test item to a processor-based first test item rendering system, the first test item rendering system including a graphics rendering engine and being configured to generate a first graphical representation of the test item; providing the test item to a second processor-based test item rendering system, the second test item rendering system including a graphics rendering engine and being configured to generate a second graphical representation of the test item; capturing, using a computer processing system, a first digital pixel image of the first graphical representation and a second digital pixel image of the second graphical representation; processing pixels of the first and second digital pixel images using the computer processing system, wherein the processing includes using an automated digital image analysis algorithm, the processing including comparing the first digital pixel image to the second digital pixel image, the algorithm generating a numerical metric that indicates an extent to which the second digital pixel image differs from the first digital pixel image; and providing an anomaly indication for the test item when the numerical metric indicates that the second digital pixel image differs from the first digital pixel image by more than a threshold amount; storing metadata for each of the first and second digital pixel images in one or more data structures, the metadata including data that identifies the test item, the rendering system used in generating the digital pixel image, and a date on which the digital pixel image was captured; and automatically selecting the first and second digital pixel images for comparison based on the metadata.