Database of images for low complexity sign detection and text localization method for mobile applications

These images (size: 480 by 640) were all taken using a VGA camera on a Nokia N800. These images were used for training our algorithm&rsquo;s thresholds.</li> <li>signs-N800-testing: This directory contains 160 images of road signs, flyers, and posters. These images (size: 480 by 640) were all taken using a VGA camera on a Nokia N800.

These images were used for testing our algorithm&rsquo;s performance.</li> <li>signs-N800-GT1: This directory contains 241 images of ground truth files used to objectively measure the number of false positives and false negatives found in each output image. In this set of ground truth images, each character in the targeted sign region was manually segmented from the rest of the image. The most prominent sign region in the image was manually chosen as the targeted sign region.

Each character is a single connected component region separated from any other character&rsquo;s connected component region.</li> <li>signs-N800-GT2: This directory contains 241 images of ground truth files used to objectively measure the number of false positives and false negatives found in each output image. In this set of ground truth images, each sign region was manually segmented from the rest of the image. All sign regions have been identified, not just the targeted sign region.</li> </ul> <p>The paper goes into more detail about how we use these files to train and test our algorithm&rsquo;s performance.

K. L. Bouman, G. Abdollahian, M. Boutin and E. J. Delp, &quot;A Low Complexity Sign Detection and Text Localization Method for Mobile Applications,&quot; in IEEE Transactions on Multimedia, vol. 13, no. 5, pp. 922-934, Oct. 2011. doi: 10.1109/TMM.2011.2154317</p>