In a project aimed at enhancing bank security, your team is tasked with developing a system to distinguish between genuine and forged signatures on checks and documents by comparing them against signatures stored in the bank's database. Given the rarity of forged signatures, the system must not only accurately identify the customer but also determine with high precision whether the signature is genuine or a skilled forgery. The solution will utilize a Convolutional Neural Network (CNN) for image recognition. Considering the need for high accuracy and the specific challenges of signature verification, which of the following technical specifications is unsuitable for use with a CNN in this context? Choose one option.