I want to make panorama image but it is showing the error message Undefined function 'imageSet' for input arguments of type 'char'

Question

Undefined function 'imageSet' for input arguments of type 'char'.

Error in build (line 3) buildingScene = imageSet(buildingDir);

% Load images.
buildingDir = fullfile(toolboxdir('vision'), 'visiondata', 'building');
buildingScene = imageSet(buildingDir);
% Display images to be stitched
montage(buildingScene.ImageLocation)
% Read the first image from the image set.
I = read(buildingScene, 1);
% Initialize features for I(1)
grayImage = rgb2gray(I);
points = detectSURFFeatures(grayImage);
[features, points] = extractFeatures(grayImage, points);

% Initialize all the transforms to the identity matrix. Note that the
% projective transform is used here because the building images are fairly
% close to the camera. Had the scene been captured from a further distance,
% an affine transform would suffice.
tforms(buildingScene.Count) = projective2d(eye(3));

% Iterate over remaining image pairs
for n = 2:buildingScene.Count

    % Store points and features for I(n-1).
    pointsPrevious = points;
    featuresPrevious = features;

    % Read I(n).
    I = read(buildingScene, n);

    % Detect and extract SURF features for I(n).
    grayImage = rgb2gray(I);
    points = detectSURFFeatures(grayImage);
    [features, points] = extractFeatures(grayImage, points);

    % Find correspondences between I(n) and I(n-1).
    indexPairs = matchFeatures(features, featuresPrevious, 'Unique', true);

    matchedPoints = points(indexPairs(:,1), :);
    matchedPointsPrev = pointsPrevious(indexPairs(:,2), :);

    % Estimate the transformation between I(n) and I(n-1).
    tforms(n) = estimateGeometricTransform(matchedPoints, matchedPointsPrev,...
        'projective', 'Confidence', 99.9, 'MaxNumTrials', 2000);

    % Compute T(1) * ... * T(n-1) * T(n)
    tforms(n).T = tforms(n-1).T * tforms(n).T;
end
avgXLim = mean(xlim, 2);

[~, idx] = sort(avgXLim);

centerIdx = floor((numel(tforms)+1)/2);

centerImageIdx = idx(centerIdx);
Tinv = invert(tforms(centerImageIdx));

for i = 1:numel(tforms)
    tforms(i).T = Tinv.T * tforms(i).T;
end
for i = 1:numel(tforms)
    [xlim(i,:), ylim(i,:)] = outputLimits(tforms(i), [1 imageSize(2)], [1 imageSize(1)]);
end

% Find the minimum and maximum output limits
xMin = min([1; xlim(:)]);
xMax = max([imageSize(2); xlim(:)]);

yMin = min([1; ylim(:)]);
yMax = max([imageSize(1); ylim(:)]);

% Width and height of panorama.
width  = round(xMax - xMin);
height = round(yMax - yMin);

% Initialize the "empty" panorama.
panorama = zeros([height width 3], 'like', I);
Step 4 - Create the Panorama

Use imwarp to map images into the panorama and use vision.AlphaBlender to overlay the images together.

blender = vision.AlphaBlender('Operation', 'Binary mask', ...
    'MaskSource', 'Input port');

% Create a 2-D spatial reference object defining the size of the panorama.
xLimits = [xMin xMax];
yLimits = [yMin yMax];
panoramaView = imref2d([height width], xLimits, yLimits);

% Create the panorama.
for i = 1:buildingScene.Count

    I = read(buildingScene, i);

    % Transform I into the panorama.
    warpedImage = imwarp(I, tforms(i), 'OutputView', panoramaView);

    % Create an mask for the overlay operation.
    warpedMask = imwarp(ones(size(I(:,:,1))), tforms(i), 'OutputView', panoramaView);

    % Clean up edge artifacts in the mask and convert to a binary image.
    warpedMask = warpedMask >= 1;

    % Overlay the warpedImage onto the panorama.
    panorama = step(blender, panorama, warpedImage, warpedMask);
end

figure
imshow(panorama)

% Load images. buildingDir = fullfile(toolboxdir('vision'), 'visiondata', 'building'); buildingScene = imageSet(buildingDir); % Display images to be stitched montage(buildingScene.ImageLocation) % Read the first image from the image set. I = read(buildingScene, 1); % Initialize features for I(1) grayImage = rgb2gray(I); points = detectSURFFeatures(grayImage); [features, points] = extractFeatures(grayImage, points); — mahtab, May 01 '15 at 16:10
The function `imageSet` requires the `Computer Vision Toolbox`...so it looks like you don't have it. What do you get when you type `which imageSet` in the Command Window? — Benoit_11, May 01 '15 at 16:13

score 1 · Accepted Answer · answered May 01 '15 at 16:46

1

imageSet requires the Computer Vision Toolbox from MATLAB R2014b or higher. See the release notes from the Computer Vision Toolbox here: http://www.mathworks.com/help/vision/release-notes.html#R2014b

If you have R2014a or lower, imageSet does not come with your distribution. The only option you have is to upgrade your MATLAB distribution. Sorry if this isn't what you wanted to hear!

answered May 01 '15 at 16:46

rayryeng

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Mr Rayryeng thanks a lot for helping me ,I installed Matlab 2015. I created a folder and put 3 photos on it and named it buildingScene , but after run it others photos showed instead of my photos, and these errors showed: – mahtab May 03 '15 at 08:29
Warning: Image is too big to fit on screen; displaying at 33% > In images.internal.initSize (line 71) In imshow (line 305) In montage (line 152) In Untitled (line 5) Attempted to access idx(3); index out of bounds because numel(idx)=1. Error in Untitled (line 53) centerImageIdx = idx(centerIdx); >> imshow Error using imshow>preParseInputs (line 421) IMSHOW expected at least 1 input argument but was called instead with 0 input arguments. Error in imshow (line 214) varargin_translated = preParseInputs(varargin{:}); – mahtab May 03 '15 at 08:30

I want to make panorama image but it is showing the error message Undefined function 'imageSet' for input arguments of type 'char'

1 Answers1