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

%%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

[Mustafa Kadhm]

Hello Sir,

Did you find the solution please ?

Regards,

[dinesh92x]

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

[jingshuig]

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"

Answer 1

[S. Muhammad Hossein Mousavi]

Please I have the same too.

Answer 2

[jingshuig]

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"

[jingshuig]

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

[Dmytro]

I think You have at least one mistake in the condition because Your (refDims(2)/refDims(2) > 1) always is false and You go to else case