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Quality assurance on PDF rendering (image compare?)


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Hello all.  I am trying to figure out the best approach to compare PDF outputs for consistency.  Currently, this is a human task where PDFs are held up to a light to see if all the values line up exactly with test data.  I have to believe there is a better way.  That said GDIPlus is a bit of a mystery to me - I have looked at some of the functions - and I stumbled upon >this very useful script in my forum search.  My question is: would converting the PDF to an image and comparing the image with GDIPlus be the way to go or is there a different more efficient approach that you would recommend?  Any guidance would be greatly appreciated.

JFish

Build your own poker game with AutoIt: pokerlogic.au3 | Learn To Program Using FREE Tools with AutoIt

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@this-is-me - Thanks.  That does look like an interesting package.   I will keep it in mind as the suggestions (hopefully) roll in.  I guess my threshold question is do I need to convert the PDFs to images for a comparison (seems like many tools may facilitate this) or is there another (better) way?

Edited by Jfish

Build your own poker game with AutoIt: pokerlogic.au3 | Learn To Program Using FREE Tools with AutoIt

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I guess you could try to use the imagesearch.au3 and keep increasing the tolerance until it is a match to your original picture?

Edit: there is a version of the imagesearch you can pass a HBMP to search in, instead of your desktop.

Edited by Geir1983
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  • 3 weeks later...

Not an AutoIt solution, but you might consider Perceptual Image Diff if you are going to convert to images. http://pdiff.sourceforge.net/

 

look here:

'?do=embed' frameborder='0' data-embedContent>>

Signature beginning:
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Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST APIErrorLog.au3 UDF - A logging Library * Include Dependency Tree (Tool for analyzing script relations) *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 UDF * ADO.au3 UDF SMTP Mailer UDF * Dual Monitor resolution detection * * 2GUI on Dual Monitor System * _SciLexer.au3 UDF * SciTE - Lexer for console pane

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I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

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"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

Signature last update: 2021-10-18

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btw.

If you want to convert PDF to image file, you can use Debenu PDF Library (look in my sign for UDF).

 

Description

Renders certain pages from the selected document to an image file on disk.

By default rendering uses the GDI+ system which is available by default in Windows XP and later.

Option 10, TIFF (G4) output, is only available on Windows Vista and Windows Server 2008 and later.

It is also possible to render using Cairo, use the SetCairoFileName and SelectRenderer functions.

Syntax

ActiveX

Function DebenuPDFLibrary1113.PDFLibrary::RenderDocumentToFile(

DPI As Double, StartPage As Long, EndPage As Long,

Options As Long, FileName As String) As Long

Parameters

DPI The DPI to use for the rendering. A value of 72 will give the same result as Acrobat

when the zoom level is 100%.

StartPage The first page to print

EndPage The last page to print

Options

0 = BMP output

1 = JPEG output

2 = WMF output

3 = EMF output

4 = EPS output

5 = PNG output

6 = GIF output

7 = TIFF output

8 = EMF+ output

9 = HTML5 output

10 = G4 TIFF output

FileName The path and filename to use for the file.

Each page will be stored in a separate file.

If this parameter contains "%p" this will be replaced by the page number, otherwise

the page number will be appended to the end of the filename before the extension.

For example, if FileName is "output.jpg" and page 10 is rendered the image will be

stored in a file called "output10.jpg".

If FileName is "page%poutput.bmp" and page 5 is rendered the image will be stored

in a file called "page5output.bmp".

Return values

0 The pages were not rendered successfully. This is usually caused by the StartPage or

EndPage parameters being out of range.

1 The pages were rendered successfully

EDIT: REMARKS: this function need commercial version of this library.

Edited by mLipok

Signature beginning:
Please remember: "AutoIt"..... *  Wondering who uses AutoIt and what it can be used for ? * Forum Rules *
ADO.au3 UDF * POP3.au3 UDF * XML.au3 UDF * for other useful stuff click the following button:

Spoiler

Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST APIErrorLog.au3 UDF - A logging Library * Include Dependency Tree (Tool for analyzing script relations) *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 UDF * ADO.au3 UDF SMTP Mailer UDF * Dual Monitor resolution detection * * 2GUI on Dual Monitor System * _SciLexer.au3 UDF * SciTE - Lexer for console pane

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Good coding practices in AutoIt * 

OpenOffice/LibreOffice/XLS Related: WriterDemo.au3 * XLS/MDB from scratch with ADOX

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities * _IEquerySelectorAll() (by uncommon) * IE in TaskSchedulerIE Embedded Control Versioning (use IE9+ and HTML5 in a GUI) * PDF Related:How to get reference to PDF object embeded in IE *

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

I also encourage you to check awesome @trancexx code:  * Create COM objects from modules without any demand on user to register anything. * Another COM object registering stuffOnHungApp handlerAvoid "AutoIt Error" message box in unknown errors  * HTML editor

winhttp.au3 related : * https://www.autoitscript.com/forum/topic/206771-winhttpau3-download-problem-youre-speaking-plain-http-to-an-ssl-enabled-server-port/

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

Signature last update: 2021-10-18

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