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PDF Table Extraction
How to Extract Tables from PDF?
2
Problem Statement
Ever tried extracting data from PDFs? It can be extremely tedious and
time-consuming!
While you could still extract text from PDFs by copy-pasting (prone to
formatting errors), extracting tables from a PDF is way more complicated &
cumbersome!
Business workflows today largely involve the exchange of PDF
documents(financial documents such as invoices, receipts, reports etc.). And
most data-rich business documents present complex information in tables.
3
How To Extract Tabular Data
Here are some of the most popular solutions to extract data from PDFs to
tables:
● Online PDF to Excel converters
● Tabula
● Camelot or Excalibur
● PDFTables
● Docparser
● Nanonets
4
Online PDF to Excel converters
Pros:
● Simple drag-and-drop
interface.
Cons:
● Can’t handle PDF files with complex
table structures.
● Doesn’t support batch processing.
● Sometimes characters or numbers aren’t
identified correctly.
● Limited use.
● Not an automated process.
● Can’t be customized.
5
Tabula
Pros:
● Tabula works
wonderfully on PDF files
that are predominantly
text-based.
● It is easy to use, robust
and can be embedded
into other software.
Cons:
● Tabula can’t handle scanned images or
documents.
● Can’t handle multi-line or merged cells.
● Doesn’t support batch processing.
● Sometimes characters or numbers aren’t
identified correctly.
● Can’t support OCR requirements.
● Not an automated process.
6
Camelot or Excalibur
Pros:
● Auto detects tables.
● Works great on text-based PDF files.
● Flexible & customizable to a large
extent.
● Exports tables to multiple formats like
CSV, Excel, JSON, HTML & Sqlite.
● Bad tables can be automatically
discarded.
● Each table can be converted to a
pandas DataFrame.
Cons:
● Camelot only works on text-based PDFs, not
scanned images or documents.
● Can’t handle complex PDF documents with
multi-line tables and merged cells.
● When using Stream, the whole page is treated
as a single table. This affects the output when
there are multiple tables on the same page.
● Can’t support OCR requirements.
● Not an automated process.
7
PDFTables
Pros:
● Works across small and large data
sets.
● Automated table extraction.
● Exports tables to multiple formats like
CSV, Excel, JSON, & XML.
● Free for up to 25 pages.
● Handles multiple files at the same
time.
Cons:
● Can’t tweak or customize the table extraction
algorithm.
● Doesn't perform Optical Character Recognition
OCR.
● Complete reliance on the underlying algorithm
for accuracy and performance.
● Doesn’t support any cloud integration.
8
Docparser
Pros:
● Supports batch processing of
multiple documents.
● Built-in OCR.
● Allows custom parsing rules.
● Exports tables to multiple formats
like CSV, Excel, JSON, & XML.
● Supports some neat integration
options.
Cons:
● Parsing rules can get complicated.
● You need to define the coordinates and boundaries
for each table.
● Runs on a template identification model.
● Can’t automatically handle new document types &
formats.
● Might require separate parsing rules for data that
come in different regions.
● Only works accurately on documents with fixed
region formatting or known templates.
● Might require some level of verification and rework.
9
Nanonets
Pros:
● Cognitive data & table extraction with OCR.
● High accuracy. Easy to use and set up.
● Automatically detects tables including structured
row-column information within its response.
● Processes documents 10x faster than other software.
● Supports batch processing of multiple documents.
● Exports tables to multiple formats (CSV, Excel,JSON.
● Seamless 2-way integration with multiple accounting
software. Almost no post-processing required.
● Works with non-English or multiple languages
● Wide choice of integration options
Cons:
● Can’t handle very high volume
spikes!
● Only offers 100 document/credits
for free per month.
10
Learn more about extracting
tables from PDF here:
https://nanonets.com/blog/extract-tables-f
rom-pdf/

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How to extract tables from pdf

  • 1. PDF Table Extraction How to Extract Tables from PDF?
  • 2. 2 Problem Statement Ever tried extracting data from PDFs? It can be extremely tedious and time-consuming! While you could still extract text from PDFs by copy-pasting (prone to formatting errors), extracting tables from a PDF is way more complicated & cumbersome! Business workflows today largely involve the exchange of PDF documents(financial documents such as invoices, receipts, reports etc.). And most data-rich business documents present complex information in tables.
  • 3. 3 How To Extract Tabular Data Here are some of the most popular solutions to extract data from PDFs to tables: ● Online PDF to Excel converters ● Tabula ● Camelot or Excalibur ● PDFTables ● Docparser ● Nanonets
  • 4. 4 Online PDF to Excel converters Pros: ● Simple drag-and-drop interface. Cons: ● Can’t handle PDF files with complex table structures. ● Doesn’t support batch processing. ● Sometimes characters or numbers aren’t identified correctly. ● Limited use. ● Not an automated process. ● Can’t be customized.
  • 5. 5 Tabula Pros: ● Tabula works wonderfully on PDF files that are predominantly text-based. ● It is easy to use, robust and can be embedded into other software. Cons: ● Tabula can’t handle scanned images or documents. ● Can’t handle multi-line or merged cells. ● Doesn’t support batch processing. ● Sometimes characters or numbers aren’t identified correctly. ● Can’t support OCR requirements. ● Not an automated process.
  • 6. 6 Camelot or Excalibur Pros: ● Auto detects tables. ● Works great on text-based PDF files. ● Flexible & customizable to a large extent. ● Exports tables to multiple formats like CSV, Excel, JSON, HTML & Sqlite. ● Bad tables can be automatically discarded. ● Each table can be converted to a pandas DataFrame. Cons: ● Camelot only works on text-based PDFs, not scanned images or documents. ● Can’t handle complex PDF documents with multi-line tables and merged cells. ● When using Stream, the whole page is treated as a single table. This affects the output when there are multiple tables on the same page. ● Can’t support OCR requirements. ● Not an automated process.
  • 7. 7 PDFTables Pros: ● Works across small and large data sets. ● Automated table extraction. ● Exports tables to multiple formats like CSV, Excel, JSON, & XML. ● Free for up to 25 pages. ● Handles multiple files at the same time. Cons: ● Can’t tweak or customize the table extraction algorithm. ● Doesn't perform Optical Character Recognition OCR. ● Complete reliance on the underlying algorithm for accuracy and performance. ● Doesn’t support any cloud integration.
  • 8. 8 Docparser Pros: ● Supports batch processing of multiple documents. ● Built-in OCR. ● Allows custom parsing rules. ● Exports tables to multiple formats like CSV, Excel, JSON, & XML. ● Supports some neat integration options. Cons: ● Parsing rules can get complicated. ● You need to define the coordinates and boundaries for each table. ● Runs on a template identification model. ● Can’t automatically handle new document types & formats. ● Might require separate parsing rules for data that come in different regions. ● Only works accurately on documents with fixed region formatting or known templates. ● Might require some level of verification and rework.
  • 9. 9 Nanonets Pros: ● Cognitive data & table extraction with OCR. ● High accuracy. Easy to use and set up. ● Automatically detects tables including structured row-column information within its response. ● Processes documents 10x faster than other software. ● Supports batch processing of multiple documents. ● Exports tables to multiple formats (CSV, Excel,JSON. ● Seamless 2-way integration with multiple accounting software. Almost no post-processing required. ● Works with non-English or multiple languages ● Wide choice of integration options Cons: ● Can’t handle very high volume spikes! ● Only offers 100 document/credits for free per month.
  • 10. 10 Learn more about extracting tables from PDF here: https://nanonets.com/blog/extract-tables-f rom-pdf/