remove barrel distortion

deleted

asked 2013-07-16 22:15:32 -0600

I.Zaytsev
26 ●2 ●5

updated 2020-09-24 14:48:32 -0600

sturkmen

6772 ●3 ●48 ●79 https://github.com/stu...

Hello! I have several of the following images:

image1

image2

image3

I have a task to recognize the text on the labels. I will recognize the text using the FineReader Engine (special SDK for recognize images). However, I need to do preprocessing of images for better recognition. What do I need to do to remove barrel distortion and other distortions?

For example, FineReader bad recognizes the "BordeauX" word in the first image(image1), it instead of the "BordeauX" word sees "ordeauX", may be because there is a flare? How can this be fixed?

Have any idea how to do the preprocessing of the images?

edit retag flag offensive close merge delete

add a comment

2

answered 2013-07-16 22:48:16 -0600

simon111

76 ●5

updated 2013-07-17 07:21:57 -0600

StevenPuttemans

20029 ●16 ●82 ●207 http://stevenputtemans...

calibrating and undistoring with opencv in c This is a great tutorial.

Use chessboard to get the camera initric matrix, and correct the image using the result matrix

edit flag offensive delete link

add a comment

1

answered 2013-07-17 08:39:42 -0600

Ben
1302 ●12 ●24

I think the main problem with not recognizing the B in Bordeaux is, that you have a strong highlight in your image at the B's position. So you might want to do some preprocessing regarding the image's contrast.

And probably, the barrel distortion caused by your camera's lense is neglectible compared to the label's distortion caused by the bottle shape. Fixing that is rather complicated.

edit flag offensive delete link

Comments

I think @Ben could be right. Have a look at histogram equalization of your image before processing.

StevenPuttemans ( 2013-07-17 08:52:22 -0600 )edit

add a comment

remove barrel distortion

2 answers

Comments

Links

Question Tools

Stats

Related questions

remove barrel distortion edit

2 answers

Comments

Links

Question Tools

Stats

Related questions

remove barrel distortion