Changes

The two soldering regions are the most important parts concerning the generated images and, by using the methodology proposed in the previous section, they can be easily extracted and evaluated as well with t-SNEby using the methodology proposed in the previous section. As the two soldering regions associated with the same image are also correlated, clearly even strongly correlated for ''tombstoning'' class samples, they must be concurrently compressed by the AE. Therefore, a dual-stream autoencoder, with two input/output layers, is required.