I need to eliminate row and colum of pixels

this image is at color the code below make it black and white then i need to eliminate everything but keep the central numbers then i need to insert a neuron that read the remaining part and tell me what it sees(so and the end the neuron need to give me a value of "SLB9751") i thought in 2 "for" one for colums and one for row, but iam just lost

I need to eliminate row and colum of pixels in a black and white image so just the center pixels will remain, i was thinking in check for a row or colum how many pixel had if it had 1/3 of black pixel you remove it, if you have more than 2/3 of black pixel you remove it so you only keep from 1/3 to 2/3.

this is what i have:

if true
clear all 
close all 
clc
A = imread('placa1.jpg');
AC = A;
[r,c,p] = size(AC);
Red = 80;
Green = 80;
Blue = 80;
for r1=1:r
  for c1=1:c
         if AC(r1,c1,1) > Red || AC(r1,c1,2) > Green || AC(r1,c1,3) > Blue
AC(r1,c1,:)=255;              
         end
         if AC(r1,c1,1) < Red || AC(r1,c1,2) < Green || AC(r1,c1,3) < Blue
AC(r1,c1,:)=0;
         end
  end
end
for r1=1:r    
  sum(AC,2)  #now what?#  
end
for c1=1:c    
end
imshow(AC);
pause();
clear all
close all
clc
end

Thanks

Answer 1

[Image Analyst]

It doesn't look like you're doing that. It looks like you're setting the image values to 255 or 0. To remove rows and columns, you'd do this

image2D(rowsToDelete, :) = []; % Delete rows.
image2D(:, colsToDelete) = []; % Delete columns.

But I'm not sure why you want to crop out certain rows or columns. Why don't you attach your image and say what you want to eliminate and why, and what you really want to measure or do?

[jorge obregon]

this image is at color the code below make it black and white then i need to eliminate everything but keep the central numbers then i need to insert a neuron that read the remaining part and tell me what it sees(so and the end the neuron need to give me a value of "SLB9751") i thought in 2 "for" one for colums and one for row, but iam just lost

and thanks for the asnwer

[Image Analyst]

I downloaded the image and it appears that there is a big wide white border, then the black background, and finally the license plate. Is that white outer border there? If not, then just invert the image and call imclearborder(), then call bwareaopen().

[jorge obregon]

no i just got the black and then the plate

[Image Analyst]

Then please upload this image. The one you had uploaded had a huge white border around it that I'll have to crop off. Make it easy for me and give me the one without the big white border.

[jorge obregon]

when matlap save the imagen the white border appear, dont know how to save it without it

the original

[Image Analyst]

Just take the green channel, threshold and call imclearborder and bwarea open

grayImage = rgbImage(:,:,2);
binaryImage = grayImage > 50;
binaryImage = imclearborder(binaryImage);
binaryImage = bwareaopen(binaryImage, 1000);

See if that works.

[jorge obregon]

iam not pretty sure how to do it, iam "new" and my teacher does not show us anything he just told us to make that u.u, and i just use what you say, but dont know if i use correctly