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Image 2D perspective correction

Need an algorithm that will detect and correct the perspective of a picture of a document/paper. The following actions will be performed to the image:

1) Detection of document corners (if surface allows it).

2) Perspective correction based on the specified corners (turn quadrilateral polygon into a rectangle)

I need specifically these 2 functions in VB or C#:

1) detectEdges(Bitmap inputImage) //returns 4 coordinate points of a quadrilateral polygon

2) correctPerspective(Bitmap inputImage, point coord1, point coord2, point coord3, point coord4) //returns the corrected image where the selected object must be in rectangle form.


- Code must be as light and as fast as possible, because code will run on a mobile phone.

- Memory usage should be as low as possible.

- No use of third party APIs, must be 100% native code.

- A sample of the desired output here: [url removed, login to view]

Skills: 3D Rendering, C Programming, C# Programming, C++ Programming, Visual Basic

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About the Employer:
( 0 reviews ) Lausanne, Peru

Project ID: #1151084

6 freelancers are bidding on average $224 for this job


Please check PMB

$200 USD in 15 days
(8 Reviews)

Kindly check PM.

$250 USD in 7 days
(2 Reviews)

I will provide you a high quality work and according to your requirements.

$215 USD in 5 days
(1 Review)

Please check my PM.

$300 USD in 14 days
(0 Reviews)

hi, I can take up this project. Please check your PM. Thanks Sunil

$200 USD in 8 days
(0 Reviews)

I have done software like you need some years ago for cartographic purposes on scanned maps.

$180 USD in 20 days
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