MATLAB: This demo isn´t working for the image

binarizationdemo_scriptimage analyst demoImage Processing Toolboxthreshold

Dear all,

I tried use this demo by Image Analyst, but for my image I wasn´t successful. Instead of cameraman.tif I gave my image thorax-mdl.jpg, which I attached. I have this error message in Command Window:

Error using imageDisplayValidateParams>validateCData (line 121)
If input is logical (binary), it must be two-dimensional.
Error in imageDisplayValidateParams (line 31)
common_args.CData = validateCData(common_args.CData,image_type);
Error in imageDisplayParseInputs (line 79)
common_args = imageDisplayValidateParams(common_args);
Error in imshow (line 198)
  [common_args,specific_args] = ...
Error in DP (line 86)
imshow(binaryImage, []);

Can anyone give me advice? Thank you for your answers.

Best Answer

You forgot to attach your code. You must have modified a demo of mine somehow and made a new script called DP.m. Evidently the code is expecting a binary image - a 2D logical image - and you're not giving it that. Maybe you're giving it a color image or something. But I can't tell because you didn't supply your code modifications. Please attach your image and DP.m and anything else we need to run your code.

Related Solutions

MATLAB: Crop dark area and display the face only

Convert to grayscale and then threshold and find the bounding box

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
imtool close all;  % Close all imtool figures.
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
% Read in the color image.
folder = pwd;
baseFileName = 'm2.bmp';
% Get the full filename, with path prepended.
fullFileName = fullfile(folder, baseFileName);
if ~exist(fullFileName, 'file')
  % Didn't find it there.  Check the search path for it.
  fullFileName = baseFileName; % No path this time.
  if ~exist(fullFileName, 'file')
    % Still didn't find it.  Alert user.
    errorMessage = sprintf('Error: %s does not exist.', fullFileName);
    uiwait(warndlg(errorMessage));
    return;
  end
end
rgbImage = imread(fullFileName);
% Get the dimensions of the image.  numberOfColorBands should be = 3.
[rows, columns, numberOfColorBands] = size(rgbImage);
% Display the original color image.
subplot(2, 3, 1);
imshow(rgbImage, []);
axis on;
title('Original Color Image', 'FontSize', fontSize);
drawnow;
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);
% Histogram the red channel, but there is a huge spike at 255 so let's not count those.
subplot(2, 3, 2);
grayImage = rgb2gray(rgbImage);
imshow(grayImage, []);
title('Gray Scale version', 'FontSize', fontSize);
subplot(2, 3, 3);
histogram(grayImage(grayImage<255))
grid on;
title('Histogram of Gray Scale Image', 'FontSize', fontSize);
someThresholdValue = 150;
binaryImage = grayImage > someThresholdValue;
% Take largest blob
binaryImage = bwareafilt(binaryImage, 1);
subplot(2, 3, 4);
imshow(binaryImage);
grid on;
title('Binary Image', 'FontSize', fontSize);
% Label the binary image.
labeledImage = bwlabel(binaryImage);
props = regionprops(labeledImage, 'BoundingBox');
bbox = props.BoundingBox
croppedImageRGB = imcrop(rgbImage, bbox);
subplot(2, 3, 5);
imshow(croppedImageRGB);
grid on;
title('Cropped RGB Image', 'FontSize', fontSize);
% Gray scale version of cropped image
croppedImageGray = imcrop(grayImage, bbox);
subplot(2, 3, 6);
imshow(croppedImageGray);
grid on;
title('Cropped Gray Scale Image', 'FontSize', fontSize);

MATLAB: How to use saveas for binary images

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Best Answer

Related Solutions

MATLAB: Crop dark area and display the face only

MATLAB: How to use saveas for binary images

Related Question