What is an 'cv2.reg_MapperGradEuclid' object? (OpenCV)
I am trying to do some image registration with OpenCV 4 and Python 3.6. Two dicom files are loaded and the pixel data is handled as numpy.ndarray. When I try to pass these arrays to the cv2.reg_MapperGradEuclid.calculate() function, the following error is raised:
descriptor 'calculate' requires a
cv2.reg_MapperGradEuclidobject
but received a 'numpy.ndarray'
I looked up the documentation and several threads, all I found was that there should be two InputArray ´s that should be of the BGR type(?) and that technically np.ndarray should work.
import numpy as np
import pydicom
import cv2
file1="one.DCM"
file2="two.DCM"
data1 = pydicom.read_file(file1)
data2 = pydicom.read_file(file2)
PixelArrayBelow = data1.pixel_array #type np.ndarray
PixelArrayAbove = data2.pixel_array
PixelArrayBelow=PixelArrayBelow.astype(np.float32)
PixelArrayAbove=PixelArrayAbove.astype(np.float32)
BelowNew=cv2.cvtColor(PixelArrayBelow,cv2.COLOR_GRAY2BGR)
AboveNew=cv2.cvtColor(PixelArrayAbove,cv2.COLOR_GRAY2BGR)
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
print(b)
I expected it to print some combination of translation and rotation vector/matrix, but the above mentioned error occured.
python opencv types
edited Jan 3 at 12:51
Matthijs
1,2051427
asked Jan 3 at 12:26
MettphysikMettphysik
32
add a comment |
I am trying to do some image registration with OpenCV 4 and Python 3.6. Two dicom files are loaded and the pixel data is handled as numpy.ndarray. When I try to pass these arrays to the cv2.reg_MapperGradEuclid.calculate() function, the following error is raised:
descriptor 'calculate' requires a
cv2.reg_MapperGradEuclidobject
but received a 'numpy.ndarray'
I looked up the documentation and several threads, all I found was that there should be two InputArray ´s that should be of the BGR type(?) and that technically np.ndarray should work.
import numpy as np
import pydicom
import cv2
file1="one.DCM"
file2="two.DCM"
data1 = pydicom.read_file(file1)
data2 = pydicom.read_file(file2)
PixelArrayBelow = data1.pixel_array #type np.ndarray
PixelArrayAbove = data2.pixel_array
PixelArrayBelow=PixelArrayBelow.astype(np.float32)
PixelArrayAbove=PixelArrayAbove.astype(np.float32)
BelowNew=cv2.cvtColor(PixelArrayBelow,cv2.COLOR_GRAY2BGR)
AboveNew=cv2.cvtColor(PixelArrayAbove,cv2.COLOR_GRAY2BGR)
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
print(b)
I expected it to print some combination of translation and rotation vector/matrix, but the above mentioned error occured.
python opencv types
edited Jan 3 at 12:51
Matthijs
1,2051427
asked Jan 3 at 12:26
MettphysikMettphysik
32
add a comment |
I am trying to do some image registration with OpenCV 4 and Python 3.6. Two dicom files are loaded and the pixel data is handled as numpy.ndarray. When I try to pass these arrays to the cv2.reg_MapperGradEuclid.calculate() function, the following error is raised:
descriptor 'calculate' requires a
cv2.reg_MapperGradEuclidobject
but received a 'numpy.ndarray'
I looked up the documentation and several threads, all I found was that there should be two InputArray ´s that should be of the BGR type(?) and that technically np.ndarray should work.
import numpy as np
import pydicom
import cv2
file1="one.DCM"
file2="two.DCM"
data1 = pydicom.read_file(file1)
data2 = pydicom.read_file(file2)
PixelArrayBelow = data1.pixel_array #type np.ndarray
PixelArrayAbove = data2.pixel_array
PixelArrayBelow=PixelArrayBelow.astype(np.float32)
PixelArrayAbove=PixelArrayAbove.astype(np.float32)
BelowNew=cv2.cvtColor(PixelArrayBelow,cv2.COLOR_GRAY2BGR)
AboveNew=cv2.cvtColor(PixelArrayAbove,cv2.COLOR_GRAY2BGR)
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
print(b)
I expected it to print some combination of translation and rotation vector/matrix, but the above mentioned error occured.
python opencv types
edited Jan 3 at 12:51
Matthijs
1,2051427
asked Jan 3 at 12:26
MettphysikMettphysik
32
I am trying to do some image registration with OpenCV 4 and Python 3.6. Two dicom files are loaded and the pixel data is handled as numpy.ndarray. When I try to pass these arrays to the cv2.reg_MapperGradEuclid.calculate() function, the following error is raised:
descriptor 'calculate' requires a
cv2.reg_MapperGradEuclidobject
but received a 'numpy.ndarray'
I looked up the documentation and several threads, all I found was that there should be two InputArray ´s that should be of the BGR type(?) and that technically np.ndarray should work.
import numpy as np
import pydicom
import cv2
file1="one.DCM"
file2="two.DCM"
data1 = pydicom.read_file(file1)
data2 = pydicom.read_file(file2)
PixelArrayBelow = data1.pixel_array #type np.ndarray
PixelArrayAbove = data2.pixel_array
PixelArrayBelow=PixelArrayBelow.astype(np.float32)
PixelArrayAbove=PixelArrayAbove.astype(np.float32)
BelowNew=cv2.cvtColor(PixelArrayBelow,cv2.COLOR_GRAY2BGR)
AboveNew=cv2.cvtColor(PixelArrayAbove,cv2.COLOR_GRAY2BGR)
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
print(b)
I expected it to print some combination of translation and rotation vector/matrix, but the above mentioned error occured.
python opencv types
python opencv types
edited Jan 3 at 12:51
Matthijs
1,2051427
asked Jan 3 at 12:26
MettphysikMettphysik
32
edited Jan 3 at 12:51
Matthijs
1,2051427
asked Jan 3 at 12:26
MettphysikMettphysik
32
edited Jan 3 at 12:51
Matthijs
1,2051427
edited Jan 3 at 12:51
Matthijs
1,2051427
edited Jan 3 at 12:51
Matthijs
1,2051427
1,2051427
asked Jan 3 at 12:26
MettphysikMettphysik
32
asked Jan 3 at 12:26
MettphysikMettphysik
32
asked Jan 3 at 12:26
MettphysikMettphysik
32
32
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
If you create a reg_MapperGradEuclid() object first and then pass the images into the object it seems to work. You are not calling the object properly.
import cv2
im1 = <some numpy array>
im2 = <some numpy array>
mge_obj = cv2.reg_MapperGradEuclid()
retval = mge_obj.calculate(im1, im2)
So to make it work with your code change:
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
to:
b = cv2.reg_MapperGradEuclid().calculate(BelowNew,AboveNew)
The class documentation is here but it's quite basic.
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
Thanks a lot. Either the documentation lacks some very important things or I just cant find them, because the resulting registration Map, again, cannot be handled easily. Instead of a 'cv2.reg_MapAffine' I get a 'cv2.reg_Map'. Its not possible to read shift and linear transformation from the latter one.
– Mettphysik
Jan 3 at 14:37
doesb = cv2.reg_MapperGradAffine().calculate(BelowNew,AboveNew)give you the right result?
– D.Griffiths
Jan 3 at 18:36
It didn´t, butreg.MapTypeCaster_toAffine(), which was again hidden somewhere in the Documentation did. Thanks anyways!
– Mettphysik
Jan 3 at 19:46
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%2f54022282%2fwhat-is-an-cv2-reg-mappergradeuclid-object-opencv%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
If you create a reg_MapperGradEuclid() object first and then pass the images into the object it seems to work. You are not calling the object properly.
import cv2
im1 = <some numpy array>
im2 = <some numpy array>
mge_obj = cv2.reg_MapperGradEuclid()
retval = mge_obj.calculate(im1, im2)
So to make it work with your code change:
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
to:
b = cv2.reg_MapperGradEuclid().calculate(BelowNew,AboveNew)
The class documentation is here but it's quite basic.
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
Thanks a lot. Either the documentation lacks some very important things or I just cant find them, because the resulting registration Map, again, cannot be handled easily. Instead of a 'cv2.reg_MapAffine' I get a 'cv2.reg_Map'. Its not possible to read shift and linear transformation from the latter one.
– Mettphysik
Jan 3 at 14:37
doesb = cv2.reg_MapperGradAffine().calculate(BelowNew,AboveNew)give you the right result?
– D.Griffiths
Jan 3 at 18:36
It didn´t, butreg.MapTypeCaster_toAffine(), which was again hidden somewhere in the Documentation did. Thanks anyways!
– Mettphysik
Jan 3 at 19:46
add a comment |
If you create a reg_MapperGradEuclid() object first and then pass the images into the object it seems to work. You are not calling the object properly.
import cv2
im1 = <some numpy array>
im2 = <some numpy array>
mge_obj = cv2.reg_MapperGradEuclid()
retval = mge_obj.calculate(im1, im2)
So to make it work with your code change:
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
to:
b = cv2.reg_MapperGradEuclid().calculate(BelowNew,AboveNew)
The class documentation is here but it's quite basic.
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
Thanks a lot. Either the documentation lacks some very important things or I just cant find them, because the resulting registration Map, again, cannot be handled easily. Instead of a 'cv2.reg_MapAffine' I get a 'cv2.reg_Map'. Its not possible to read shift and linear transformation from the latter one.
– Mettphysik
Jan 3 at 14:37
doesb = cv2.reg_MapperGradAffine().calculate(BelowNew,AboveNew)give you the right result?
– D.Griffiths
Jan 3 at 18:36
It didn´t, butreg.MapTypeCaster_toAffine(), which was again hidden somewhere in the Documentation did. Thanks anyways!
– Mettphysik
Jan 3 at 19:46
add a comment |
If you create a reg_MapperGradEuclid() object first and then pass the images into the object it seems to work. You are not calling the object properly.
import cv2
im1 = <some numpy array>
im2 = <some numpy array>
mge_obj = cv2.reg_MapperGradEuclid()
retval = mge_obj.calculate(im1, im2)
So to make it work with your code change:
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
to:
b = cv2.reg_MapperGradEuclid().calculate(BelowNew,AboveNew)
The class documentation is here but it's quite basic.
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
If you create a reg_MapperGradEuclid() object first and then pass the images into the object it seems to work. You are not calling the object properly.
import cv2
im1 = <some numpy array>
im2 = <some numpy array>
mge_obj = cv2.reg_MapperGradEuclid()
retval = mge_obj.calculate(im1, im2)
So to make it work with your code change:
b = cv2.reg_MapperGradEuclid.calculate(BelowNew,AboveNew)
to:
b = cv2.reg_MapperGradEuclid().calculate(BelowNew,AboveNew)
The class documentation is here but it's quite basic.
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
answered Jan 3 at 13:51
D.GriffithsD.Griffiths
7461317
7461317
Thanks a lot. Either the documentation lacks some very important things or I just cant find them, because the resulting registration Map, again, cannot be handled easily. Instead of a 'cv2.reg_MapAffine' I get a 'cv2.reg_Map'. Its not possible to read shift and linear transformation from the latter one.
– Mettphysik
Jan 3 at 14:37
doesb = cv2.reg_MapperGradAffine().calculate(BelowNew,AboveNew)give you the right result?
– D.Griffiths
Jan 3 at 18:36
It didn´t, butreg.MapTypeCaster_toAffine(), which was again hidden somewhere in the Documentation did. Thanks anyways!
– Mettphysik
Jan 3 at 19:46
add a comment |
Thanks a lot. Either the documentation lacks some very important things or I just cant find them, because the resulting registration Map, again, cannot be handled easily. Instead of a 'cv2.reg_MapAffine' I get a 'cv2.reg_Map'. Its not possible to read shift and linear transformation from the latter one.
– Mettphysik
Jan 3 at 14:37
doesb = cv2.reg_MapperGradAffine().calculate(BelowNew,AboveNew)give you the right result?
– D.Griffiths
Jan 3 at 18:36
It didn´t, butreg.MapTypeCaster_toAffine(), which was again hidden somewhere in the Documentation did. Thanks anyways!
– Mettphysik
Jan 3 at 19:46
Thanks a lot. Either the documentation lacks some very important things or I just cant find them, because the resulting registration Map, again, cannot be handled easily. Instead of a 'cv2.reg_MapAffine' I get a 'cv2.reg_Map'. Its not possible to read shift and linear transformation from the latter one.
– Mettphysik
Jan 3 at 14:37
Thanks a lot. Either the documentation lacks some very important things or I just cant find them, because the resulting registration Map, again, cannot be handled easily. Instead of a 'cv2.reg_MapAffine' I get a 'cv2.reg_Map'. Its not possible to read shift and linear transformation from the latter one.
– Mettphysik
Jan 3 at 14:37
does
b = cv2.reg_MapperGradAffine().calculate(BelowNew,AboveNew) give you the right result?– D.Griffiths
Jan 3 at 18:36
does
b = cv2.reg_MapperGradAffine().calculate(BelowNew,AboveNew) give you the right result?– D.Griffiths
Jan 3 at 18:36
It didn´t, but
reg.MapTypeCaster_toAffine() , which was again hidden somewhere in the Documentation did. Thanks anyways!– Mettphysik
Jan 3 at 19:46
It didn´t, but
reg.MapTypeCaster_toAffine() , which was again hidden somewhere in the Documentation did. Thanks anyways!– Mettphysik
Jan 3 at 19:46
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%2f54022282%2fwhat-is-an-cv2-reg-mappergradeuclid-object-opencv%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
