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Why using double command in matlab in this code ?

Why using double command in matlab in this code ?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Why using double command in matlab in this code ?

clear;clc; %clear workspace and screen * read image % display image %store image information in c m=imread('image.jpg'); figure (1),imshow (m); c=imfinfo ('image.jpg') y=c.width х-с.Нeight m=double (m) ; %convert image data class into double for i=1:1:x-1 %loop for red channel for j=1:1:y-1 m1 (i,j,1)=m(i,j,1); m1 (i,j,2)=0; m1 (i,j,3)=0; end end ml=uint8 (ml); figure (2), imshow (ml) sconvert image data class into uint8 % display red image for i=1:1:x-1 %loop for green channel for j=1:1:y-1 m2 (i,j,1)=0; m2 (i,j,2)=m(i,j,2); m2 (i,j,3)=0; end end m2=uint8 (m2); figure (3),imshow (m2)
Transcribed Image Text:clear;clc; %clear workspace and screen * read image % display image %store image information in c m=imread('image.jpg'); figure (1),imshow (m); c=imfinfo ('image.jpg') y=c.width х-с.Нeight m=double (m) ; %convert image data class into double for i=1:1:x-1 %loop for red channel for j=1:1:y-1 m1 (i,j,1)=m(i,j,1); m1 (i,j,2)=0; m1 (i,j,3)=0; end end ml=uint8 (ml); figure (2), imshow (ml) sconvert image data class into uint8 % display red image for i=1:1:x-1 %loop for green channel for j=1:1:y-1 m2 (i,j,1)=0; m2 (i,j,2)=m(i,j,2); m2 (i,j,3)=0; end end m2=uint8 (m2); figure (3),imshow (m2)
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