Image preprocessing

Dead freelancer,

I'm looking for an image processing professional to build a small C# console app (or winform app, ref A3) that preprocess an image of a text document taken by a digital camera (of a smart phone) before performing OCR

The preprocessing should:

1. Detect document's edegs and deskew to correct perspective (using affine tranform correction) (ref A1, A2)

2. Trim to remove borders

3. Dynamic binarization (only on the main image after deskew and trimming)

4. Noise removal, despeckle

5. Brightness correction including glare removal (that are caused due to document angle with respect to light sources)

6. Shadow removal

7. Hole punch removal

8. Line removal (to keep only text)

9. Reconstruct text

10. Text sharpening

Preferred technology in OpenCV.

The input is a URL to a JPG image file and the output image should be written to the local computer in PNG format.

Output should be small C# application (or winform) with source code and all dependencies running on my local win 7 computer

Please state your preferred technology, past experience and if possible provide links to those projects.

Link to sample images with be given to submitters


A1: [url removed, login to view]

A2: [url removed, login to view]

A3: [url removed, login to view]

Taidot: C# -ohjelmointi, Image Processing

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Tietoa työnantajasta:
( 4 arvostelua ) Hadera, Israel

Projektin tunnus: #15195484

Myönnetty käyttäjälle:


Hi I will provide simple tools using Imagemagick and OpenCV. I will do all that features for 550$ and 2 days. I will need further information to start working Thanks Relevant Skills and Experience I used an app wi Lisää

$555 USD 3 päivässä
(5 Arvostelua)

31 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön


Hello I'm interesting your project very well I'm a Good Linux, C++, c#, Python, swift, object-c, OpenCV, Math, Java, Algorithm expert. Relevant Skills and Experience I m quite well experienced in these jobs. Let's go Lisää

$515 USD 10 päivässä
(247 arvostelua)

I have my ALPR engine. Or I can use the opencv for your project. Please check my job history. I want to discuss you project in detail Best regards Relevant Skills and Experience OCR, ALPR Proposed Milestones $500 US Lisää

$500 USD 10 päivässä
(30 arvostelua)

Hello. I am very interesting on your project. Relevant Skills and Experience I have good experience with image processing with opencv and etc. Proposed Milestones $555 USD - init Please message me for detail discuss Lisää

$555 USD 10 päivässä
(12 arvostelua)

Hello I have quite good experience in implementing OpenCV in .NET. I look forward to dicuss the job further. Regards Relevant Skills and Experience Bowl Builder 3D [C# 4.5, WPF, Telerik WPF, Sqlite, 3D OpenCV] Billi Lisää

$666 USD 10 päivässä
(2 arvostelua)
$555 USD 10 päivässä
(17 arvostelua)

Hi, i can develop with project with you, i will use c# and Aforge libs, lets chat and get this started Relevant Skills and Experience c# Proposed Milestones $722 USD - when done

$722 USD 10 päivässä
(12 arvostelua)

Hi, I'm glad to meet u on freelancer. I read your description. I'm experienced in image processing. I'll give you very good result, I think. I hope we'll discuss. Stay tuned, I'm still working on this proposal.

$555 USD 10 päivässä
(6 arvostelua)
$333 USD 10 päivässä
(2 arvostelua)

Hi Relevant Skills and Experience I am good in c# and OCR. I have made the barcde and character recognition projects So i can help you. Proposed Milestones $555 USD - 1

$555 USD 10 päivässä
(8 arvostelua)

samples please Relevant Skills and Experience various image processing projects from custom captcha decoders to face detection and object extraction Proposed Milestones $555 USD - ignore for now bid is a place holder Lisää

$555 USD 10 päivässä
(2 arvostelua)

Hello. I have some experience of developing OCR applications and image preparing using EmguCV(OpenCV) and [url removed, login to view] The quality of the images must be optimal 300 dpi to give a maximum OCR quality. Соответствующие нав Lisää

$350 USD 10 päivässä
(11 arvostelua)

Hello, I am an experience OpenCV programmer. You can check it in my profile. I think I can help you. Thank you Relevant Skills and Experience OpenCV, C#, EmguCV, Character Recognition Proposed Milestones $600 USD - M Lisää

$600 USD 10 päivässä
(3 arvostelua)

I am excellent developer with 3 year experience in your related project field can do this project as you are saying. If you are worry about your project then I am best choice for you. Relevant Skills and Experience C# Lisää

$555 USD 10 päivässä
(12 arvostelua)

I'm a full stack developer on .NET stack and already developed many web application successfully. For the last 7 years I got experience working with many start-ups in many industries. Relevant Skills and Experience I' Lisää

$555 USD 10 päivässä
(4 arvostelua)

hello we have worked on this type of work before as well using c# and aforge library. I have experience in this work and readybro help you

$305 USD 15 päivässä
(3 arvostelua)

I have just completed an OCR project with more than 80% accuracy on one of the hardest dataset. And I am new here but professional in my field. Relevant Skills and Experience Relevant Skills and Experience - matlab, p Lisää

$250 USD 10 päivässä
(1 arvostelu)

Hi, dear I have deep knowledge and rich practical experience in this field, so I'm very interested in your project. Relevant Skills and Experience C# Programming, Image Processing Proposed Milestones $250 USD - m I' Lisää

$250 USD 7 päivässä
(2 arvostelua)

-------------------------------Professional C# Developer! Best Result in Time!------------------------------ Relevant Skills and Experience Dear sir. I read your project description very carefully. I've really rich e Lisää

$400 USD 10 päivässä
(2 arvostelua)

Hi,dear. I am a senior software developer. I have just checked your project "Image preprocessing", I can complete this project. Thanks. Relevant Skills and Experience C# Programming, Image Processing Proposed Milesto Lisää

$555 USD 10 päivässä
(2 arvostelua)

Hello dear, I have a lot of experience in Computer Vision applications / image and video processing in mobile and windows applications. I have got 3+ years of development using openCV, Tesseract, GCV Relevant Skills Lisää

$750 USD 10 päivässä
(1 arvostelu)