MATLAB: Level the blobs and Delete Blob containing Text in it.

Computer Vision Toolboxdigital image processingimage analysisimage processingImage Processing Toolboximage segmentation

I want to delete texts or words present in my result image.

let the image is :

i have done the blob analysys and plot the object location using this code:

%% Calculate number of object present in output image

    BW=bwlabel(BW);
    s = regionprops(BW,'BoundingBox');
    b = bwboundaries(BW);
    n = size(b, 1);

%% Function For Ploting object location

 figure,imshow(BW)
 hold on;
 for n=1:size(s,1)
rectangle('Position',s(n).BoundingBox,'EdgeColor','y','LineWidth',1)
 end
 hold off;

so then the output image is :

now i want to lable these blobs:

and then remove the blob containing text in it.:

so thus the output image will be:

and the final image i want is :

How will i do this?

Best Answer

Priyanka, what's the status of this? Do you still need help? Can you answer Walter's question? Can you just filter based on the area of the blob? Do all the bird shapes have about the same area, which is different than the letters? Can you use this example? http://www.mathworks.com/help/vision/examples/automatically-detect-and-recognize-text-in-natural-images.html?prodcode=VP&language=en to find the text and then delete it?

Related Solutions

MATLAB: How can i detect round objects and remove other objects in an image using matlab

It seemed to work for me:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
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;
rgbImage = imread('005.png');
grayImage = rgb2gray(rgbImage);
subplot(2,2,1);
imshow(grayImage);
title('Original Image', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Threshold the image.
binaryImage = im2bw(grayImage, .4);
% Display the image.
subplot(2,2,2);
imshow(binaryImage)
title('Initial Binary Image', 'FontSize', fontSize);
% Dilate the image to enlarge the small blobs.
se = strel('disk',11);
binaryImage = imdilate(binaryImage,se);
subplot(2,2,3);
imshow(binaryImage)
title('Dilated Image', 'FontSize', fontSize);
% Label the blobs.

labeledImage = bwlabel(binaryImage);
measurements = regionprops(labeledImage,'Area','Perimeter');
% Do size filtering and roundness filtering.
% Get areas and perimeters of all the regions into single arrays.

allAreas = [measurements.Area]
allPerimeters = [measurements.Perimeter]
% Compute circularities.
circularities = allPerimeters.^2 ./ (4*pi*allAreas)
% Find objects that have "round" values of circularities.
maxAllowableArea = 50000;
keeperBlobs = circularities < 3 & allAreas < maxAllowableArea; % Whatever values you want.
% Get actual index numbers instead of a logical vector
% so we can use ismember to extract those blob numbers.
roundObjects = find(keeperBlobs);
% Compute new binary image with only the small, round objects in it.
binaryImage = ismember(labeledImage, roundObjects) > 0;
subplot(2,2,4);
imshow(binaryImage);
title('Final Image', 'FontSize', fontSize);
% Remeasure with this new segmentation.
% Label the blobs.
labeledImage = bwlabel(binaryImage);
measurements = regionprops(labeledImage,'Area','Perimeter', 'Centroid');
% Get areas and perimeters of all the regions into single arrays.
allAreas = [measurements.Area]
allPerimeters = [measurements.Perimeter]
allCentroids = [measurements.Centroid]
centroidX = allCentroids(1:2:end);
centroidY = allCentroids(2:2:end);
% Plot circles around them
hold on;
for k = 1 : length(centroidX);
  plot(centroidX(k), centroidY(k), ...
    'ro', 'MarkerSize', 20, 'LineWidth', 2);
end

What does "not working well" mean to you? What exactly do you want as an output of this routine? The size, location, what?????

MATLAB: I have RGB (MxNx3) image and a binary mask (MxN). I want to place this mask over the RGB such that a line should be shown along the shape of the mask on the RGB image.

Call bwboundaries() then plot

boundaries = bwboundaries(binaryImage);
numberOfBoundaries = size(boundaries, 1);
hold on;
for k = 1 : numberOfBoundaries
  thisBoundary = boundaries{k};
  plot(thisBoundary(:,2), thisBoundary(:,1), 'r-', 'LineWidth', 2);
end
hold off;

Best Answer

Related Solutions

MATLAB: How can i detect round objects and remove other objects in an image using matlab

MATLAB: I have RGB (MxNx3) image and a binary mask (MxN). I want to place this mask over the RGB such that a line should be shown along the shape of the mask on the RGB image.

Related Question