OpenCV Python align 4 corners of an element
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}
I have the location of the 4 corners of the element but I want to straighten it
My image looks like this representation:
From misaligned to aligned element
The said element is in an image so I'd like to apply the alignment to the whole image.
python opencv image-processing
asked Nov 24 '18 at 23:06
MushMush
86
add a comment |
I have the location of the 4 corners of the element but I want to straighten it
My image looks like this representation:
From misaligned to aligned element
The said element is in an image so I'd like to apply the alignment to the whole image.
python opencv image-processing
asked Nov 24 '18 at 23:06
MushMush
86
add a comment |
I have the location of the 4 corners of the element but I want to straighten it
My image looks like this representation:
From misaligned to aligned element
The said element is in an image so I'd like to apply the alignment to the whole image.
python opencv image-processing
asked Nov 24 '18 at 23:06
MushMush
86
I have the location of the 4 corners of the element but I want to straighten it
My image looks like this representation:
From misaligned to aligned element
The said element is in an image so I'd like to apply the alignment to the whole image.
python opencv image-processing
python opencv image-processing
asked Nov 24 '18 at 23:06
MushMush
86
asked Nov 24 '18 at 23:06
MushMush
86
asked Nov 24 '18 at 23:06
MushMush
86
asked Nov 24 '18 at 23:06
MushMush
86
asked Nov 24 '18 at 23:06
MushMush
86
86
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
What you are searching for is a homography Transformation.
First you need the positions of your 4 corner points of the image and then your have to define the destination of those 4 points. In your case it would be the image boundaries. If you have your destination points, you can call the function H, mask = cv.findHomography(srcPoints, dstPoints)(see documentation in calib3d module).
The matrix H describes the transformation from your source image to the destination image. Next you need to apply the Matrix H on your image which can be done with the function
dst = cv.warpPerspective(srcImage, destImage,H) (see documentation of this function here).
If you want to do more stuff with the homography matrix, see OpenCv Homography tutorial with example code
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53463144%2fopencv-python-align-4-corners-of-an-element%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
What you are searching for is a homography Transformation.
First you need the positions of your 4 corner points of the image and then your have to define the destination of those 4 points. In your case it would be the image boundaries. If you have your destination points, you can call the function H, mask = cv.findHomography(srcPoints, dstPoints)(see documentation in calib3d module).
The matrix H describes the transformation from your source image to the destination image. Next you need to apply the Matrix H on your image which can be done with the function
dst = cv.warpPerspective(srcImage, destImage,H) (see documentation of this function here).
If you want to do more stuff with the homography matrix, see OpenCv Homography tutorial with example code
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
add a comment |
What you are searching for is a homography Transformation.
First you need the positions of your 4 corner points of the image and then your have to define the destination of those 4 points. In your case it would be the image boundaries. If you have your destination points, you can call the function H, mask = cv.findHomography(srcPoints, dstPoints)(see documentation in calib3d module).
The matrix H describes the transformation from your source image to the destination image. Next you need to apply the Matrix H on your image which can be done with the function
dst = cv.warpPerspective(srcImage, destImage,H) (see documentation of this function here).
If you want to do more stuff with the homography matrix, see OpenCv Homography tutorial with example code
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
add a comment |
What you are searching for is a homography Transformation.
First you need the positions of your 4 corner points of the image and then your have to define the destination of those 4 points. In your case it would be the image boundaries. If you have your destination points, you can call the function H, mask = cv.findHomography(srcPoints, dstPoints)(see documentation in calib3d module).
The matrix H describes the transformation from your source image to the destination image. Next you need to apply the Matrix H on your image which can be done with the function
dst = cv.warpPerspective(srcImage, destImage,H) (see documentation of this function here).
If you want to do more stuff with the homography matrix, see OpenCv Homography tutorial with example code
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
What you are searching for is a homography Transformation.
First you need the positions of your 4 corner points of the image and then your have to define the destination of those 4 points. In your case it would be the image boundaries. If you have your destination points, you can call the function H, mask = cv.findHomography(srcPoints, dstPoints)(see documentation in calib3d module).
The matrix H describes the transformation from your source image to the destination image. Next you need to apply the Matrix H on your image which can be done with the function
dst = cv.warpPerspective(srcImage, destImage,H) (see documentation of this function here).
If you want to do more stuff with the homography matrix, see OpenCv Homography tutorial with example code
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
edited Nov 25 '18 at 0:05
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
answered Nov 24 '18 at 23:39
Ph1llip2Ph1llip2
1163
1163
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53463144%2fopencv-python-align-4-corners-of-an-element%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
