## 2 Materials and Methods
### Data Acquisition and Traditional Methods for Edge Tracing
#### 2.2.2 Traditional Methods for Edge Tracing  
Currently, damage maps, in terms of both the extraction of shapes and the characterization or determination of damage, are made with vector programs such as Corel Draw(r) or Illustrator(r), among others. However, there are experts who prefer working with Photoshop(r) [23], in this case with bitmaps instead of vectors. In contrast, there are people who use drawing software on devices such as tablets or iPads, recreating the traditional manual form of image capture. In all cases, the process of shape extraction followed by damage mapping, all completed manually without assistance from any software, is a considerable time investment.  
Figure 2 shows the manual edge detection process, completed manually by a conservation expert with an iPad, an Apple Pencil, and a vectorial drawing software called Curve,  
\begin{table}
\begin{tabular}{c c c c c} \hline
**Title** & **Author** & **Date** & **Materials** & **Dimensions** \\ \hline Zoosofias no. 100 & [PERSON] & 2018 & Acrylics and pencil on wooden board & 180 cm diameter, including the frame \\ Abrazada al fantasma del amor (ES) & [PERSON] & 1980 & Acrylics on canvas & 65 \(\times\) 80.5 cm \\ Embracing the ghost of love (EN) & [PERSON] & 2017 & Oil and spray paint on linen & 150 \(\times\) 195 cm \\ Nobody will speak of us when we are dead & [PERSON] & 1992 & Acrylics on canvas & 180 \(\times\) 150 cm \\ El nuevo orden mundial (ES) & [PERSON] & & & \\ \hline \end{tabular}
\end{table}
Table 1: Information about the artworks.  
\begin{table}
\begin{tabular}{c c c c c} \hline
**Artwork (In English)** & **Focal Length** & **F Number** & **Exposure Time** & **Resolution (Pixels)** \\ \hline Zoosofias no. 100 & 24 mm & f/9 & 8 sec & 4491 \(\times\) 4425 \\ Embracing the ghost of love & 24 mm & f/11 & 1/4 & 4496 \(\times\) 3655 \\ Nobody will speak of us when & 24 mm & f/9 & 1/3 & 6246 \(\times\) 4971 \\ we are dead & 24 mm & f/9 & 1/3 & 4981 \(\times\) 5832 \\ The new world order & 24 mm & f/9 & 1/3 & 4981 \(\times\) 5832 \\ \hline \end{tabular}
\end{table}
Table 2: Acquisition parameters and imaging resolution used for each artwork.  
which is then superimposed on its corresponding image with some transparency. This process is performed by tracing the vectors directly onto the original image, so that the lines are drawn directly on the edges.  
These hand-drawn contour drawings are what conservators and restoreers use as a reference for the subsequent generation of a damage map, so these images are the ones that will be used as a reference for the subsequent verification of what was generated for this research by the AI.  
No formal protocol checks are made on these drawings as they are carefully made by an expert. Therefore, contours were traced according to the expert's subjective judgment, guided by their professional knowledge and a visual interpretation of the images.  
It is observable that the human-created edges are not entirely accurate. In Figure 2d, specific details such as the pattern of the woman's jacket on the left and the bird's own feathers have not been considered as an edge.