How do I repair noisy picture and invert the bw color?

Hello, new to the matlab app, I'm trying to repair this image

to be like this picture (or close)

Any help would be much appreciated.

Thanks.

[Rik]

What have you tried so far?

[Dustkin Jou]

using this

clc;

close all;

clearvars;

img = imread('7.jpg');

rotated = imrotate(img,-90);

gray = rgb2gray(rotated);

bw = imbinarize(gray);

comp = imcomplement(bw);

se = strel('line',30,90);

erode = imerode(comp,se);

dil = imdilate(erode,se);

erode1 = imerode(dil,se);

dil1 = imdilate(erode1,se);

figure(1);

imshow(dil1);

this is the output, im trying to get smoother in the tip and bottom

Answer 1

[DGM]

This is a very lazy answer. Consider this more a matter of cleanup than optimizing the object reconstruction. I'm not going to pretend that this is complete or robust.

img = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1195578/image.jpeg');

gray = rgb2gray(img); % convert to gray first; reduces cost of subsequent ops
gray = imrotate(gray,-90); % not every single output needs to be a unique variable

bw = ~imbinarize(gray); % equivalent to imcomplement(binaryimage)
se = strel('line',30,90); % idk why this was selected
bw = imopen(bw,se); % opening is equivalent to dilate(erode(x,se),se)
% opening with a fixed strel is idempotent
% i.e. opening again with the same strel does not change the result

% added
bw = imclose(bw,strel('disk',100,0)); % fills some holes and closes some gaps
bw = bwareaopen(bw,10000); % gets rid of small specks
bwoutline = bwperim(bw);
% that 1px outline won't show up when rescaled here
% due to display interpolation.  
% fatten the line so it shows up
bwoutline = imdilate(bwoutline,strel('disk',7));

imshow(bwoutline);

Not really there, but it's ... what it is.

[Image Analyst]

And you can use bwperim() to get the outline like he wanted.

[DGM]

I edited it to include that. I didn't really consider the example to be complete enough to warrant the window dressing, but I suppose completion isn't my judgement call to make.

[Dustkin Jou]

Thank you. This is the output i was looking for, thank you so much