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

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%%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:
any help will be appreciated.
thank you
  3 Comments
jingshuig
jingshuig on 14 Dec 2018
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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Answers (2)

Seyed Muhammad Hossein Mousavi
Please I have the same too.

jingshuig
jingshuig on 14 Dec 2018
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"
  1 Comment
jingshuig
jingshuig on 2 Jan 2019
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

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