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One of the most common modes of representing engineering schematics are Piping and Instrumentation diagrams (P&IDs) that describe the layout of an engineering process flow along with the interconnected process equipment. Over the years,…

Computer Vision and Pattern Recognition · Computer Science 2019-02-01 Rohit Rahul , Shubham Paliwal , Monika Sharma , Lovekesh Vig

Digitization of scanned Piping and Instrumentation diagrams(P&ID), widely used in manufacturing or mechanical industries such as oil and gas over several decades, has become a critical bottleneck in dynamic inventory management and creation…

Computer Vision and Pattern Recognition · Computer Science 2021-09-09 Shubham Paliwal , Arushi Jain , Monika Sharma , Lovekesh Vig

Digitizing engineering diagrams like Piping and Instrumentation Diagrams (P&IDs) plays a vital role in maintainability and operational efficiency of process and hydraulic systems. Previous methods typically decompose the task into separate…

Computer Vision and Pattern Recognition · Computer Science 2025-12-22 Jan Marius Stürmer , Marius Graumann , Tobias Koch

Developing Piping and Instrumentation Diagrams (P&IDs) is a crucial step during the development of chemical processes. Currently, this is a tedious, manual, and time-consuming task. We propose a novel, completely data-driven method for the…

Computation and Language · Computer Science 2024-01-17 Edwin Hirtreiter , Lukas Schulze Balhorn , Artur M. Schweidtmann

Piping and Instrumentation Diagrams (P&IDs) constitute the foundational blueprint of a plant, depicting the interconnections among process equipment, instrumentation for process control, and the flow of fluids and control signals. In their…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Soumya Swarup Prusty , Astha Agarwal , Srinivasan Iyenger

Each scanner possesses its unique characteristics and exhibits its distinct sampling error distribution. Training a network on a dataset that includes data collected from different scanners is less effective than training it on data…

Computer Vision and Pattern Recognition · Computer Science 2026-04-27 Zhikun Tu , Yuhe Zhang , Yiou Jia , Kang Li , Daniel Cohen-Or

Spotting graphical symbols from the computer-aided design (CAD) drawings is essential to many industrial applications. Different from raster images, CAD drawings are vector graphics consisting of geometric primitives such as segments, arcs,…

Computer Vision and Pattern Recognition · Computer Science 2022-01-11 Zhaohua Zheng , Jianfang Li , Lingjie Zhu , Honghua Li , Frank Petzold , Ping Tan

Convolutional neural networks (CNNs) have been widely used in the computer vision community, significantly improving the state-of-the-art. But learning good features often is computationally expensive in machine learning settings and is…

Computer Vision and Pattern Recognition · Computer Science 2026-01-14 Janis Mohr , Jörg Frochte

Deep-learning techniques have been used widely to alleviate the labour-intensive and time-consuming manual annotation required for pixel-level tissue characterization. Our previous study introduced an efficient single dynamic network -…

Image and Video Processing · Electrical Eng. & Systems 2023-05-25 Haoju Leng , Ruining Deng , Zuhayr Asad , R. Michael Womick , Haichun Yang , Lipeng Wan , Yuankai Huo

As global trends are shifting towards data-driven industries, the demand for automated algorithms that can convert digital images of scanned documents into machine readable information is rapidly growing. Besides the opportunity of data…

Computer Vision and Pattern Recognition · Computer Science 2021-05-25 Pascal Fischer , Alen Smajic , Alexander Mehler , Giuseppe Abrami

Out-of-distribution (OOD) detection methods often exploit auxiliary outliers to train model identifying OOD samples, especially discovering challenging outliers from auxiliary outliers dataset to improve OOD detection. However, they may…

Computer Vision and Pattern Recognition · Computer Science 2024-03-25 Yichen Bai , Zongbo Han , Changqing Zhang , Bing Cao , Xiaoheng Jiang , Qinghua Hu

A piping and instrumentation diagram (P&ID) is a central reference document in chemical process engineering. Currently, chemical engineers manually review P&IDs through visual inspection to find and rectify errors. However, engineering…

Computational Engineering, Finance, and Science · Computer Science 2026-05-28 Lukas Schulze Balhorn , Niels Seijsener , Kevin Dao , Minji Kim , Dominik P. Goldstein , Ge H. M. Driessen , Artur M. Schweidtmann

One-shot image semantic segmentation poses a challenging task of recognizing the object regions from unseen categories with only one annotated example as supervision. In this paper, we propose a simple yet effective Similarity Guidance…

Computer Vision and Pattern Recognition · Computer Science 2020-05-13 Xiaolin Zhang , Yunchao Wei , Yi Yang , Thomas Huang

Recognizing symbols in architectural CAD drawings is critical for various advanced engineering applications. In this paper, we propose a novel CAD data annotation engine that leverages intrinsic attributes from systematically archived CAD…

Computer Vision and Pattern Recognition · Computer Science 2025-11-13 Ruifeng Luo , Zhengjie Liu , Tianxiao Cheng , Jie Wang , Tongjie Wang , Xingguang Wei , Haomin Wang , YanPeng Li , Fu Chai , Fei Cheng , Shenglong Ye , Wenhai Wang , Yanting Zhang , Yu Qiao , Hongjie Zhang , Xianzhong Zhao

We revisit the one-shot Neural Architecture Search (NAS) paradigm and analyze its advantages over existing NAS approaches. Existing one-shot method, however, is hard to train and not yet effective on large scale datasets like ImageNet. This…

Computer Vision and Pattern Recognition · Computer Science 2020-07-09 Zichao Guo , Xiangyu Zhang , Haoyuan Mu , Wen Heng , Zechun Liu , Yichen Wei , Jian Sun

Topological features such as persistence diagrams and their functional approximations like persistence images (PIs) have been showing substantial promise for machine learning and computer vision applications. This is greatly attributed to…

Computer Vision and Pattern Recognition · Computer Science 2020-05-26 Anirudh Som , Hongjun Choi , Karthikeyan Natesan Ramamurthy , Matthew Buman , Pavan Turaga

Access to large and diverse computer-aided design (CAD) drawings is critical for developing symbol spotting algorithms. In this paper, we present FloorPlanCAD, a large-scale real-world CAD drawing dataset containing over 10,000 floor plans,…

Computer Vision and Pattern Recognition · Computer Science 2021-12-01 Zhiwen Fan , Lingjie Zhu , Honghua Li , Xiaohao Chen , Siyu Zhu , Ping Tan

Many studies have concentrated on constructing supervised models utilizing paired datasets for image denoising, which proves to be expensive and time-consuming. Current self-supervised and unsupervised approaches typically rely on…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Huaqiu Li , Wang Zhang , Xiaowan Hu , Tao Jiang , Zikang Chen , Haoqian Wang

Parsing Computer-Aided Design (CAD) drawings is a fundamental step for CAD revision, semantic-based management, and the generation of 3D prototypes in both the architecture and engineering industries. Labeling symbols from a CAD drawing is…

Computer Vision and Pattern Recognition · Computer Science 2024-04-18 Junbiao Pang , Zailin Dong , Jiaxin Deng , Mengyuan Zhu , Yunwei Zhang

Graph Out-of-Distribution (OOD) detection aims to identify whether a test graph deviates from the distribution of graphs observed during training, which is critical for ensuring the reliability of Graph Neural Networks (GNNs) when deployed…

Machine Learning · Computer Science 2026-02-20 Luzhi Wang , Xuanshuo Fu , He Zhang , Chuang Liu , Xiaobao Wang , Hongbo Liu
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