1. A method for inspecting web material in real-time and computing a severity of a non-uniformity defect as the web material is manufactured, the method comprising: receiving, with an online computerized inspection system, an image captured from a web material being manufactured; processing the image with the inspection system to extract a first set of features; processing the first set of features with the inspection system with a model to dynamically select a second set of features to extract from the image in accordance with the model; determining, in accordance with the model, an expected reduction in cost of misclassifying the image with respect to the non-uniformity defect if the second set of features are extracted from the image; when the expected reduction in cost exceeds a threshold, processing the image with the inspection system to extract the second set of features; and computing the severity level for the non-uniformity defect for the web material with the inspection system using the first set of features and the second set of features extracted from the image.