Invoice capture is a growing area of AI where most companies are making their first purchase of an AI product. This is because invoice capture is an easy to integrate solution with significant benefits. While digitization helped automate numerous processes, mostly rule based software was used in digitization. Invoice capture software is different. Invoice capture involves both reading the invoice text with Optical Character Recognition OCR and understanding its context with machine learning.

Invoice capture also called invoice data extraction or invoice OCR is extracting structured data from invoices so invoices can be automatically processed. Your email address will not be published. We answered all your invoice capture related questions: What is invoice capture? View Post. Leave a Reply Cancel reply Your email address will not be published. Search for: Search. We use cookies to ensure that we give you the best experience on our website.

If you continue to use this site we will assume that you are happy with it.In this article, we share some of our research and development efforts from our AI team at Ivalua. One to highlight includes, the analysis of documents with greater accuracy, by taking advantage of the new deep learning based methods and experimenting on new AI infrastructures.

The first objective was to extract fields from structured documents, namely invoices. As we humans know and expect most of the time, invoice documents have characteristics that other documents do not share. In most cases, the numeric information numbers, prices, totals, quantities, … are aligned in different varieties, that might be drawn with explicit lines or separators, or something has to be guessed by the alignment of the characters.

This kind of inference makes the use of non-AI algorithms far from our common understanding of an invoice. Another characteristic of invoices is that some fields are required, such as the client, the supplier, the invoice number, the total amount… and they have a common position in the document: the layout possibility is limited and helps humans to easily understand invoices. The purpose of Artificial Intelligence is to recreate the intuition of human intelligence when reading an invoice.

This is different based on if global or local, and is being driven by the number of previously read invoices. For that purpose, we believe that deep learning methods will become particularly useful and common in this area. The methods used can be the image of the document itself directly, or the characters extracted by an OCR algorithm.

In one case, it is a computer vision problem, in the other case, a natural language processing problem. Both problems benefit today from deep learning advances when achieving state-of-the-art accuracy. At first, we experimented with computer vision.

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However, document image analysis suffers from the lack of research in the domain: most state-of-the-art computer vision deep learning networks and architectures have been developed for use with natural images. In order to achieve a better analysis, we started with the first neural networks invented by LeCun on the digits dataset, where the problem was to identify the digit number. It was quite easy to get some training data to train the networks in their framework since any OCR can be used to create the data from any document.

Here is the result we got:. These results gave us the first root network layers to build our complete document invoice neural networks. Here again, multiple frameworks are possible to understand an invoice and we choose the segmentation frameworks for which each pixel of the invoice document has to be classified into one class or label.

Such a segmentation of the document is very useful to help us extract field values from the invoice with more confidence. The classes to segment correspond to commonly found data in an invoice:.

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The creation of the dataset required the help of extra resources to annotate our invoice documents with the right classes. We also had to define annotation rules and definitions. After all this was set, we trained our models and got the following results on validation data:. What is shown here is the segmentation map predicted by the system. It shows where the different classes of information are the most probably located.

For example you can clearly see the customer information in light green on upper right and the table footer class detected on the bottom right of the invoice, in brown. Experiments show that traditional deep learning networks for computer vision are not that efficient on images of invoices, however the networks we developed at Ivalua perform better by a significant margin.Go to the content Go to main menu.

Patrick Seguin December 10, Artificial intelligence AI has captivated and inspired us since the dawn of mankind.

invoice deep learning

We can see this in the myths and stories of civilizations throughout the world, from sentient statues like Pandora or the Golem to emotional robots like R2D2 and C3PO.

It was perhaps inevitable that AI evolved from mythological concept to mainstream tech, but when you stop to think about it, the technology and its capabilities are no less incredible than tales of living clay mannequins and tin men with hearts. Put simply, AI is a machine-based simulation of human thought processes.

This is a broad term that we can break down into subsections according to level of intelligence. This highly advanced capability is powered by networks of algorithms known as artificial neural networks.

Every single one of these algorithm layers is capable of learning specific information with continued use. The use of several layers creates depth ; that is, artificial neural networks are capable of self-sufficient deep learning. The headline-grabbing applications of artificial neural networks include self-driving cars, facial recognition, and medical diagnosis.

Automated invoice data capture is not as glamorous and contentious as robot vehicles, intelligent CCTV, or smart medical image analysis. As we have just seen, OCR alone is not capable of processing invoices on its own. All it does is convert images into text that you can work with. To get useful output, you need to instruct traditional OCR invoice recognition software constantly, feeding it new templates and rules for every new invoice your company receives. An OCR platform with powerful neural networks can understand and process text contained in each data field in the invoice.

With continuous use, deep learning capabilities enable the software to recognize new invoice formats with little to no human intervention — every now and again, minor corrections may be required. Financial documents are complex and variable. While the data they contain tends to be consistent across all of them, most companies tend to have their own invoice templates, and there are no naming standards for invoice data fields. A simple OCR program is not going to understand any of these differences.

With a lack of rules comes an increased risk of inaccurate data capture, and consequential accounting errors. AI brings understanding to OCR invoice recognition — it learns templates and naming standards on its own, with occasional assistance from a human operator. It is this application of deep learning that makes AI invoice processing as fascinating as a thinking, feeling robot — it can be transformative, not just in a business context, but also in an individual context, giving AP team members opportunities to take their roles out of the back office and into the front lines.

If you train a neural network to recognize and work with invoices it has never seen before just as a human can doyou can turn hundreds of hours of tedious work into a few seconds or minutes of computer processing time. Of all the use cases for AI-powered data extractioninvoice processing is one of the most significant.

The right platform can bring multiple advantages to your AP team and your organization as a whole, including:. This side-by-side comparison of manual data entry and AI invoice processing is like a race between a toddler and Usain Bolt: no contest. Consider that, for one invoice, manual data extraction took over three and a half minutes, while AI-enabled extraction took just under 27 seconds. Future invoices from the same supplier will require even less time to process, as the platform now recognizes it and no longer requires human validation.

The solution gets smarter with every new invoice it processes; therefore, our example company will eventually have the option of fully automated invoice processing.Go to the content Go to main menu. Patrick Seguin December 10, Artificial intelligence AI has captivated and inspired us since the dawn of mankind.

We can see this in the myths and stories of civilizations throughout the world, from sentient statues like Pandora or the Golem to emotional robots like R2D2 and C3PO. It was perhaps inevitable that AI evolved from mythological concept to mainstream tech, but when you stop to think about it, the technology and its capabilities are no less incredible than tales of living clay mannequins and tin men with hearts.

Put simply, AI is a machine-based simulation of human thought processes. This is a broad term that we can break down into subsections according to level of intelligence. This highly advanced capability is powered by networks of algorithms known as artificial neural networks.

Every single one of these algorithm layers is capable of learning specific information with continued use.

The use of several layers creates depth ; that is, artificial neural networks are capable of self-sufficient deep learning.

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The headline-grabbing applications of artificial neural networks include self-driving cars, facial recognition, and medical diagnosis. Automated invoice data capture is not as glamorous and contentious as robot vehicles, intelligent CCTV, or smart medical image analysis.

As we have just seen, OCR alone is not capable of processing invoices on its own. All it does is convert images into text that you can work with. To get useful output, you need to instruct traditional OCR invoice recognition software constantly, feeding it new templates and rules for every new invoice your company receives. An OCR platform with powerful neural networks can understand and process text contained in each data field in the invoice. With continuous use, deep learning capabilities enable the software to recognize new invoice formats with little to no human intervention — every now and again, minor corrections may be required.

Financial documents are complex and variable. While the data they contain tends to be consistent across all of them, most companies tend to have their own invoice templates, and there are no naming standards for invoice data fields.

invoice deep learning

A simple OCR program is not going to understand any of these differences. With a lack of rules comes an increased risk of inaccurate data capture, and consequential accounting errors. AI brings understanding to OCR invoice recognition — it learns templates and naming standards on its own, with occasional assistance from a human operator.Last Updated on August 7, Text classification describes a general class of problems such as predicting the sentiment of tweets and movie reviews, as well as classifying email as spam or not.

Deep learning methods are proving very good at text classification, achieving state-of-the-art results on a suite of standard academic benchmark problems. In this post, you will discover some best practices to consider when developing deep learning models for text classification. Discover how to develop deep learning models for text classification, translation, photo captioning and more in my new bookwith 30 step-by-step tutorials and full source code. The modus operandi for text classification involves the use of a word embedding for representing words and a Convolutional Neural Network CNN for learning how to discriminate documents on classification problems.

Yoav Goldberg, in his primer on deep learning for natural language processing, comments that neural networks in general offer better performance than classical linear classifiers, especially when used with pre-trained word embeddings. The non-linearity of the network, as well as the ability to easily integrate pre-trained word embeddings, often lead to superior classification accuracy. He also comments that convolutional neural networks are effective at document classification, namely because they are able to pick out salient features e.

Networks with convolutional and pooling layers are useful for classification tasks in which we expect to find strong local clues regarding class membership, but these clues can appear in different places in the input. Convolutional and pooling layers allow the model to learn to find such local indicators, regardless of their position. It does not constitute a standalone, useful network on its own, but rather is meant to be integrated into a larger network, and to be trained to work in tandem with it in order to produce an end result.

The tying together of these three elements is demonstrated in perhaps one of the most widely cited examples of the combination, described in the next section. You can get good results for document classification with a single layer CNN, perhaps with differently sized kernels across the filters to allow grouping of word representations at different scales.

Yoon Kim in his study of the use of pre-trained word vectors for classification tasks with Convolutional Neural Networks found that using pre-trained static word vectors does very well. He suggests that pre-trained word embeddings that were trained on very large text corpora, such as the freely available word2vec vectors trained on billion tokens from Google news may offer good universal features for use in natural language processing.

Despite little tuning of hyperparameters, a simple CNN with one layer of convolution performs remarkably well. Our results add to the well-established evidence that unsupervised pre-training of word vectors is an important ingredient in deep learning for NLP. He also discovered that further task-specific tuning of the word vectors offer a small additional improvement in performance. Kim describes the general approach of using CNN for natural language processing. Sentences are mapped to embedding vectors and are available as a matrix input to the model.

Convolutions are performed across the input word-wise using differently sized kernels, such as 2 or 3 words at a time. The resulting feature maps are then processed using a max pooling layer to condense or summarize the extracted features.

The architecture is based on the approach used by Ronan Collobert, et al.

Invoice Data Capture with AI: Rule-based versus cognitive field extraction

In it, they develop a single end-to-end neural network model with convolutional and pooling layers for use across a range of fundamental natural language processing problems. Kim provides a diagram that helps to see the sampling of the filters using differently sized kernels as different colors red and yellow. Usefully, he reports his chosen model configuration, discovered via grid search and used across a suite of 7 text classification tasks, summarized as follows:.

Some hyperparameters matter more than others when tuning a convolutional neural network on your document classification problem. Ye Zhang and Byron Wallace performed a sensitivity analysis into the hyperparameters needed to configure a single layer convolutional neural network for document classification. The study is motivated by their claim that the models are sensitive to their configuration.

Unfortunately, a downside to CNN-based models — even simple ones — is that they require practitioners to specify the exact model architecture to be used and to set the accompanying hyperparameters. To the uninitiated, making such decisions can seem like something of a black art because there are many free parameters in the model.In this article, I cover the theory behind receipt digitization and implement an end-to-end pipeline using OpenCV and Tesseract.

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I also review a few important papers that do Receipt Digitization using Deep Learning. In order to manage this information effectively, companies extract and store the relevant information contained in these documents.

Traditionally this has been achieved by manually extracting the relevant information and inputting it into a database which is a labor-intensive and expensive process. Extracting key information from receipts and converting them to structured documents can serve many applications and services, such as efficient archiving, fast indexing and document analytics. They play critical roles in streamlining document-intensive processes and office automation in many financial, accounting and taxation areas.

Computing Accounts payable AP and Accounts Receivables ARs manually is costly, time-consuming and can lead to confusion between managers, customers and vendors. With digitization, companies can eliminate these drawbacks and can have more advantages - Increased Transparency, Data Analytics, Improved working capital and easier tracking.

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Managing tasks, information flows, and product flows is the key to ensuring complete control of supply and production. This is essential if organizations are to meet delivery times and control production costs. The companies that are truly thriving these days have something significant in common: a digitized supply chain.

One of the key elements of realising the next generation digital Supply Chain 4. Manual entry of receipts acts as a bottleneck across the supply chain and leads to unnecessary delays. If this receipt processing is digitized it can lead to substantial gains in time and efficiency. Have an OCR problem in mind? Want to digitize invoices, PDFs or number plates? Head over to Nanonets and build OCR models for free! Receipt digitization is difficult since receipts have a lot of variations and are sometimes of low quality.

Scanning receipts also introduces several artifacts into our digital copy. These artifacts pose many readability challenges.For a long time, we have relied on paper invoices to process payments and maintain accounts.

Reconciling invoices typically involves someone manually spending hours browsing through several invoices and jotting things down in a ledger. Among the several drawbacks of going through these procedures manually are higher costs, greater manpower requirement, a higher amount of time consumed in repetitive tasks and a greater carbon footprint.

This post is mostly going to focus on OCR and information extraction. Before we dive into what is wrong with the current state of OCR and information extraction in invoice processing, let us first look at why we should care about invoice digitization in the first place. N anonets supports invoice data extraction in over 60 languages.

Automating Invoice Processing with OCR and Deep Learning

Build your own model or request a demo today! Digitizing information has several advantages a business can gain on several grounds. Businesses can track their processes better, can provide better customer service, improve the productivity of their employees and reduce costs. The process of reviewing invoices has evolved a lot over time.

How AI Invoice Processing Works

The growth in technology has seen the process of invoice processing move through three major phases. Consider a use case where an organisation is going through it's process of reimbursing its regular vendors for the expenses of the month. With the advent of OCR techniques, much time was saved by automatically extracting the text out of a digital image of any invoice or a document.

invoice deep learning

This is where most organisations that use OCR for any form of automation are currently. By using OCR and deep learning, we have enabled machines to perform as well and in some cases even better than humans. Deep learning approaches have seen advancement in the particular problem of reading the text and extracting structured and unstructured information from images.

By merging existing deep learning methods with optical character recognition technology, companies and individuals have been able to automate the process of digitizing documents and enabled easier manual data entry procedures, better logging and storage, lower errors and better response times. Several tools are available in the market and the open-source community for such tasks, all with their pros and cons. All these tools fall short in the same manner - bad accuracy which requires manual error correction and the need for rule-based engines following the text extraction to actually be able to use the data in any meaningful manner.

We will talk more about these problems and more in the coming sections. The OCR landscape mostly consists of rule-based engines that rely heavily on post-processing OCR results by matching patterns or defining specific templates that the OCR results are forced to fit in.

Traditional OCR vs. AI: The Champion of Invoices

This approach has seen some success but requires a layer of software built on top of the OCR engines which is a resource-consuming task. A bigger problem with this rule-based approach is that this added layer of software has to be designed again every time you are dealing with a new invoice template. Automating the templating process along with OCR can create a massive impact for anyone working with invoices. A lesser-known approach to this problem includes using machine learning to learn the structure of a document or an invoice itself, allowing us to work with data, localize the fields we need to extract first as if we were solving an Object Detection problem and not OCR and then getting the text out of it.

This can be done by modeling your neural networks in a way to learn how to identify and extract tables, understanding columns and fields present in it, what columns and fields are commonly found in an invoice notwithstanding the format.

The advantage of such an approach is that it becomes possible to make a machine learning model that can be generalized to any kind of document or invoice and can be used out of the box without any customizations.

Adding a continuous learning loop by collecting new data and retraining models periodically can lead to great performance on a large variety of data. Even with all the benefits automated invoice processing has to offer, industries haven't seen widespread adoption of OCR and deep learning technologies and there are several reasons for it.

Let's try to understand with an example - a health insurance company dealing with prescriptions and invoices. Automating claims processing in your insurance company by letting users upload images of invoices by taking pictures on their phones or computers or scanning invoices will increase the convenience for customers and will attract them more. These uploaded images usually go through several rounds of the manual review where you verify if the invoices are legitimate if the numbers add up, it the products mentioned in the receipts are valid for an insurance claim, etc.