How to adjust a image as the empty image

Restore

asked 2017-08-13 22:32:36 -0600

yode
185 ●2 ●9

updated 2017-08-16 14:07:01 -0600

Suppose I have a empty paper like this image

Then I write some text on the paper,but the result paper have been distorted,rotated and translated.like this image

How to adjust the result papper according the original empty paper? As you see,some empty transverse line can align this two images. The result(I get it by Photoshop) like this image is expected.

I want to use OpenCV to do this.Can anybody give a better solution for this?

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answered 2017-08-13 23:16:55 -0600

Ziri
292 ●4 ●7

If you have 4 points as reference. You can use getPerspectiveTransform function to obtain transformation matrix , then apply this matrix using warpPerspective function .

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I don't want to use manual participation.It show be automatically totaly.Because I should correct many many image by that empty paper

yode ( 2017-08-13 23:19:46 -0600 )edit

4 points are the corners of that page. you'll have to detect them automatically in image you want to adjust.

If not maybe you can use another reference ( maybe that MAXLEAF in the bottom of page).

Ziri ( 2017-08-13 23:27:47 -0600 )edit

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answered 2017-08-14 05:29:44 -0600

sturkmen

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

updated 2017-08-14 07:54:41 -0600

for a perfect solution take a look at this (have python source)

by the way i tried to improve the code used in my other answer and get the image below ( it is not perfect but maybe helpful )

you can find my trial C++ source code on github

image description

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I am curious, What points you're using ?

Ziri ( 2017-08-14 06:45:49 -0600 )edit

Thanks I will learn it,If I have confused about your code.I will ask you still

yode ( 2017-08-14 06:51:43 -0600 )edit

i edited the source a bit to show some steps to be easier to understand but i have no time to explain all the things. but i will try to answer some specific questions if needed.

sturkmen ( 2017-08-14 07:20:00 -0600 )edit

Thank very much...

yode ( 2017-08-14 08:03:44 -0600 )edit

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How to adjust a image as the empty image

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How to adjust a image as the empty image