André Luiz Printes

Prof. André Luiz Printes


Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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20 June 2023 in Applied Sciences
Verified
Journal Article
Open access
PDF file
GMGabriella Rabelo Monteiro
Gabriella Rabelo Monteiro
LCLeonardo Yuto Suzuki Camelo
Leonardo Yuto Suzuki Camelo
GAGustavo de Aquino e Aquino Aquino
Gustavo de Aquino e Aquino Aquino
Rubens de Andrade FernandesRubens de Andrade Fernandes
Rubens de Andrade Fernandes
RGRAIMUNDO CLAUDIO SOUZA GOMES
RAIMUNDO CLAUDIO SOUZA GOMES
CFCarlos Mauricio Serodio Figueiredo
Carlos Mauricio Serodio Figueiredo
Recent advancements in Artificial Intelligence (AI), deep learning (DL), and computer vision have revolutionized various industrial processes through image classification and object detection. State-of-the-art Optical Character Recognition (OCR) and object detection (OD) technologies, such as YOLO and PaddleOCR, have emerged as powerful solutions for addressing challenges in recognizing textual and non-textual information on printed stickers. However, a well-established framework integrating these cutting-edge technologies for industrial applications still needs to be discovered. In this paper, we propose an innovative framework that combines advanced OCR and OD techniques to automate visual inspection processes in an industrial context. Our primary contribution is a comprehensive framework adept at detecting and recognizing textual and non-textual information on printed stickers within a company, harnessing the latest AI tools and technologies for sticker information recognition. Our experiments reveal an overall macro accuracy of 0.88 for sticker OCR across three distinct patterns. Furthermore, the proposed system goes beyond traditional Printed Character Recognition (PCR) by extracting supplementary information, such as barcodes and QR codes present in the image, significantly streamlining industrial workflows and minimizing manual labor demands.

2 June 2023 in Applied Sciences
Verified
Journal Article
Open access
PDF file
NANádila Silva Azevedo
Nádila Silva Azevedo
GAGustavo de Aquino e Aquino Aquino
Gustavo de Aquino e Aquino Aquino
LNLeonardo Nascimento
Leonardo Nascimento
LCLeonardo Yuto Suzuki Camelo
Leonardo Yuto Suzuki Camelo
TFThiago Figueira
Thiago Figueira
CFCarlos Mauricio Serodio Figueiredo
Carlos Mauricio Serodio Figueiredo
The banking industry has been employing artificial intelligence (AI) technologies to enhance the quality of its services. More recently, AI algorithms, such as natural language understanding (NLU), have been integrated into chatbots to improve banking applications. These chatbots are typically designed to cater to customers’ needs. However, research in the development of troubleshooting chatbots for technical purposes remains scarce, especially in the banking sector. Although a company may possess a knowledge database, a standard methodology is essential to guiding an AI developer in building a chatbot, making the modeling of technical needs into a specialized chatbot a challenging task. This paper presents a novel methodology for developing troubleshooting chatbots. We apply this methodology to create an AI-powered chatbot capable of performing technical ATM maintenance tasks. We propose the TroubleshootingBot, an experimental protocol to obtain data for evaluating the chatbot through two scenarios. The first scenario detects user intent, and the second recognizes desired values in a user’s phrase (e.g., three beeps or two beeps). For these scenarios, we achieved accuracies of 0.93 and 0.88, respectively. This work represents a significant advancement in virtual assistants for banking applications and holds potential for other technical problem-solving applications.

1 October 2024 in IEEE Access
Verified
Journal Article
Open access
WCWallace Cavalcante
Wallace Cavalcante
Israel Gondres TornéIsrael Gondres Torné
Israel Gondres Torné
LCLeonardo Yuto Suzuki Camelo
Leonardo Yuto Suzuki Camelo
Rubens de Andrade FernandesRubens de Andrade Fernandes
Rubens de Andrade Fernandes
APAndré Luiz Printes
André Luiz Printes
HBHendrio Bragança
Hendrio Bragança
Advancements in Artificial Intelligence and Deep Learning have impacted numerous fields, particularly through innovations like You Only Look Once for object detection and PaddleOCR for optical character recognition in computer vision. These technologies are pivotal in automating and enhancing the accuracy of tasks, such as detecting and extracting characters from identification badges, which have traditionally been prone to manual effort, time consumption, and errors. This study introduces an automated method for detecting and extracting textual data from identification badges, achieving notable efficiency and precision. Our results indicate a Character Error Rate of 0.028 for name recognition and a flawless score for registration number extraction, with a precision rate of 0.992 for the identification badge detection model. By highlighting the importance of automating character extraction and badge detection, this study showcases the ability of Artificial Intelligence and Deep Learning to revolutionize and improve data extraction processes with digital identification systems in professional environments.

6 February 2025 in Preprints.org
Verified
Preprint
Open access
PDF file
GAGustavo de Aquino e Aquino Aquino
Gustavo de Aquino e Aquino Aquino
NANádila Silva Azevedo
Nádila Silva Azevedo
LOLeandro Okimoto
Leandro Okimoto
LCLeonardo Yuto Suzuki Camelo
Leonardo Yuto Suzuki Camelo
HBHendrio Bragança
Hendrio Bragança
Israel Gondres TornéIsrael Gondres Torné
Israel Gondres Torné
The rapid evolution of intelligent chatbots has been largely driven by the advent of Large Language Models (LLMs), which have greatly enhanced natural language understanding and generation. However, the fast-paced advancements in generative Artificial Intelligence (AI) and LLM technologies present challenges for developers to stay up-to-date and to select optimal architectures or approaches from a wide range of available options. This survey article addresses these challenges by providing a overview of cutting-edge techniques and architectural application choices in modern generative chatbot development. We explore various approaches involving retrieval strategies, chunking methods, context management, embeddings, and the utilization of LLMs. Furthermore, we analyze paradigms such as naive Retrieval-Augmented Generation (RAG) compared to Graph-Based RAG, as well as single-agent versus multi-agent systems. We examine agent-based methodologies, comparing single-agent systems with multi-agent architectures, and analyze how multi-agent systems can proficiently handle intricate tasks, enhance scalability, and mitigate faults such as hallucinations through collaborative efforts. Additionally, we review tools and frameworks such as LangGraph that facilitate the implementation of stateful, multi-agent LLM applications. By categorizing and analyzing these modern techniques, this survey aims to present the current landscape and future directions in chatbot development.

26 September 2024 in Sensors
Verified
Journal Article
Open access
PDF file
RTRuan Teixeira
Ruan Teixeira
CCCelso Carvalho
Celso Carvalho
Carlos T. CalafateCarlos T. Calafate
Carlos T. Calafate
EMEdjair Mota
Edjair Mota
Rubens de Andrade FernandesRubens de Andrade Fernandes
Rubens de Andrade Fernandes
LNLennon Brandão Freitas do Nascimento
Lennon Brandão Freitas do Nascimento
Monitoring vast and remote areas like forests using Wireless Sensor Networks (WSNs) presents significant challenges, such as limited energy resources and signal attenuation over long distances due to natural obstacles. Traditional solutions often require extensive infrastructure, which is impractical in such environments. To address these limitations, we introduce the “FloatingBlue” architecture. This architecture, known for its superior energy efficiency, combines Bluetooth Low Energy (BLE) technology with Delay Tolerant Networks (DTN) and data mules. It leverages BLE’s low power consumption for energy-efficient sensor broadcasts while utilizing DTN-enabled data mules to collect data from dispersed sensors without constant network connectivity. Deployed in a remote agricultural area in the Amazon region, “FloatingBlue” demonstrated significant improvements in energy efficiency and communication range, with a high Packet Delivery Ratio (PDR). The developed BLE beacon sensor achieved state-of-the-art energy consumption levels, using only 2.25 µJ in sleep mode and 11.8 µJ in transmission mode. Our results highlight “FloatingBlue” as a robust, low-power solution for remote monitoring in challenging environments, offering an energy-efficient and scalable alternative to traditional WSN approaches.

11 May 2023 in Preprints.org
Verified
Preprint
Open access
PDF file
GMGabriella Rabelo Monteiro
Gabriella Rabelo Monteiro
LCLeonardo Yuto Suzuki Camelo
Leonardo Yuto Suzuki Camelo
GAGustavo de Aquino e Aquino Aquino
Gustavo de Aquino e Aquino Aquino
Rubens de Andrade FernandesRubens de Andrade Fernandes
Rubens de Andrade Fernandes
RGRAIMUNDO CLAUDIO SOUZA GOMES
RAIMUNDO CLAUDIO SOUZA GOMES
JOJozias Parente Oliveira
Jozias Parente Oliveira
Recent advancements in Artificial Intelligence (AI), Deep Learning (DL), and computer vision have revolutionized various industrial processes through image classification and object detection. State-of-the-art Optical Character Recognition (OCR) and Object Detection (OD) technologies, such as YOLO and PaddleOCR, have emerged as powerful solutions for addressing challenges in recognizing textual and non-textual information on printed stickers. However, a well-established framework integrating these cutting-edge technologies for industrial applications still needs to be discovered. In this paper, we propose an innovative framework that combines advanced OCR and OD techniques to automate visual inspection processes in an industrial context. Our primary contribution is a comprehensive framework adept at detecting and recognizing textual and non-textual information on printed stickers within a company, harnessing the latest AI tools and technologies for sticker information recognition. Our experiments reveal an overall macro accuracy of 0.88 for the sticker OCR across three distinct patterns. Furthermore, the proposed system goes beyond traditional Printed Character Recognition (PCR) by extracting supplementary information, such as barcodes and QR codes present in the image, significantly streamlining industrial workflows and minimizing manual labor demands.