What function replaced vision.Geo​metricTran​sformEstim​ator

I am currently attempting to use some demo code that was written a few years ago. The demo was to visualize SURF features in video data. I am using it for an object detection project. I keep getting an error: Unable to resolve the name vision.GeometricTransformEstimator. Is there a function that replaced this one?

Thank you for taking the time to look at the code and help me.

code snippet:

%% Define Geometric Transformation Objects
gte = vision.GeometricTransformEstimator; 
gte.Method = 'Random Sample Consensus (RANSAC)';
[tform_matrix, inlierIdx] = step(gte, ref_matched_pts, I_matched_pts);
ref_inlier_pts = ref_matched_pts(inlierIdx,:);
I_inlier_pts = I_matched_pts(inlierIdx,:);

full code:

%% Copyright 2011-2013 The MathWorks, Inc.                                 
% This is a simple demo to visualize SURF features of the video data. 
% 
% Original version created by Takuya Otani
% Senior Application Engineer, MathWorks, Japan
% 
clear all; close all; clc;
%% Load reference image, and compute surf features
ref_img = imread('MWqueen_crop_small.bmp');
ref_img_gray = rgb2gray(ref_img);
ref_pts = detectSURFFeatures(ref_img_gray);
[ref_features,  ref_validPts] = extractFeatures(ref_img_gray,  ref_pts);
figure; imshow(ref_img);
hold on; plot(ref_pts.selectStrongest(50));
%% Visual 25 SURF features
figure;
subplot(5,5,3); title('First 25 Features');
for i=1:25
    scale = ref_pts(i).Scale;
    image = imcrop(ref_img,[ref_pts(i).Location-10*scale 20*scale 20*scale]);
    subplot(5,5,i);
    imshow(image);
    hold on;
    rectangle('Position',[5*scale 5*scale 10*scale 10*scale],'Curvature',1,'EdgeColor','g');
end
%% Compare to video frame
image = imread('MWsample_full.png');
I = rgb2gray(image);
% Detect features
I_pts = detectSURFFeatures(I);
[I_features, I_validPts] = extractFeatures(I, I_pts);
figure;imshow(image);
hold on; plot(I_pts.selectStrongest(50));
%% Compare card image to video frame
index_pairs = matchFeatures(ref_features, I_features);
ref_matched_pts = ref_validPts(index_pairs(:,1)).Location;
I_matched_pts = I_validPts(index_pairs(:,2)).Location;
figure, showMatchedFeatures(image, ref_img, I_matched_pts, ref_matched_pts, 'montage');
title('Showing all matches');
%% Define Geometric Transformation Objects
gte = vision.GeometricTransformEstimator; 
gte.Method = 'Random Sample Consensus (RANSAC)';
[tform_matrix, inlierIdx] = step(gte, ref_matched_pts, I_matched_pts);
ref_inlier_pts = ref_matched_pts(inlierIdx,:);
I_inlier_pts = I_matched_pts(inlierIdx,:);
% Draw the lines to matched points
figure;showMatchedFeatures(image, ref_img, I_inlier_pts, ref_inlier_pts, 'montage');
title('Showing match only with Inliers');
%% Transform the corner points 
% This will show where the object is located in the image
tform = maketform('affine',double(tform_matrix));
[width, height,~] = size(ref_img);
corners = [0,0;height,0;height,width;0,width];
new_corners = tformfwd(tform, corners(:,1),corners(:,2));
figure;imshow(image);
patch(new_corners(:,1),new_corners(:,2),[0 1 0],'FaceAlpha',0.5);

[nadji hadroug]

Hiii.

Dear AARON HILTON

you can just change the MATLAB version to version MATLAB R2015a/b

and your full codeis working exactly

.............................................

or you can tchek the toolbox of MATLAB R2015a and copy 'Define Geometric Transformation Objects.mdl'

to your version MATLAB..... as you like.

Good luck

Answer 1

[Srivardhan Gadila]

Starting MATLAB R2016a release when you use the System object vision.GeometricTransformEstimator, MATLAB® issues a warning. Replace the use of the System object with it's corresponding function fitgeotrans

Refer to the following links:

1. Computer Vision Toolbox Release Notes
2. fitgeotrans
3. "vision.GeometricTransformer" Object

Answer 2

[Dariusz Maton]

try estimateGeometricTransform2D