How does iShield® detect explicit images?
iShield®’s locates areas of interest in each image using colour analysis. Next a series of techniques are applied, namely contrast normalization, skin-colour analysis, texture-analysis, edge-detection, blob-detection, shape analysis, brightness-flow analysis, and face detection. The results of these image processing techniques are fed into a neural network to make a decision on the image. Next the text is recovered from the web-page and analysed. The results of the text-analysis and image-analysis are combined to make an overall decision.