Undefined function 'findScaleTransform' for input arguments of type 'double'. How to solve it?

Question

mohd bin 2015-11-15

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/254893-undefined-function-findscaletransform-for-input-arguments-of-type-double-how-to-solve-it

评论： Dmytro 2023-4-19

%%Rescale replacment video frame
% Load replacment video frame
videoFrame = step(video);
% Get replacement and reference dimensions
repDims = size(videoFrame(:,:,1));
refDims = size(referenceImage);
% Find transformation that scales video frame to replacmente image size, preserving aspect ratio
scaleTransform = findScaleTransform(refDims,repDims);
outputView = imref2d(size(referenceImage));
videoFrameScaled = imwarp(videoFrame, scaleTransform, 'OutputView', outputView);
figure(1)
imshowpair(referenceImage, videoFrameScaled, 'Montage');

i got this problem at this section, when i'm doing this tutorial:

http://es.mathworks.com/videos/object-recognition-and-tracking-for-augmented-reality-90546.html

any help will be appreciated.

thank you

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dinesh92x 2017-3-29

Oh!! I have the same problem.If any body find solution please provide me. Why "findScaleTransform" is not working.??

jingshuig 2018-12-14

在 MATLAB Online 中打开

HI，

I think "findScaleTransform" is a private function in the example.

I'v find a solution . May be useful.

function [scaleTransform ]=  findScaleTransform(refDims,repDims)
scaleTransform=affine2d([repDims(1)/refDims(1) 0 0 ; 0 repDims(2)/refDims(2) 0 ;0 0 1]);
end

Add this function in the dir,and named "findScaleTransform.m"

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Answer 1

S. Muhammad Hossein Mousavi 2018-2-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/254893-undefined-function-findscaletransform-for-input-arguments-of-type-double-how-to-solve-it#answer_302892

Please I have the same too.

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Answer 2

jingshuig 2018-12-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/254893-undefined-function-findscaletransform-for-input-arguments-of-type-double-how-to-solve-it#answer_352302

在 MATLAB Online 中打开

HI，

I think "findScaleTransform" is a private function in the example.

I'v find a solution . May be useful.

function [scaleTransform ]=  findScaleTransform(refDims,repDims)
scaleTransform=affine2d([repDims(1)/refDims(1) 0 0 ; 0 repDims(2)/refDims(2) 0 ;0 0 1]);
end

Add this function in the dir,and named "findScaleTransform.m"

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jingshuig 2019-1-2

在 MATLAB Online 中打开

add some new：

% 2019 01 02 
%find transform
function [scaleTransform ]=  findScaleTransform(refDims,repDims)
if (repDims(1)/repDims(2) > 1) && (refDims(2)/refDims(2) > 1) % When the ratio of length to width is the same
    scaleTransform=affine2d([1/(repDims(1)/refDims(1)) 0 0 ; 0 1/(repDims(2)/refDims(2)) 0 ;0 0 1]);
else % When the ratio of length to width is different
    scaleTransform=affine2d([0 1/(repDims(2)/refDims(1))  0 ;  1/(repDims(1)/refDims(2)) 0 0 ;0 0 1]);
end
end