import cv2
import numpy as np
height, width = 300, 300
R = np.full((height, width), 255, dtype=np.uint8) # Red plane (fully red)
G = np.zeros((height, width), dtype=np.uint8) # Green plane (zero)
B = np.full((height, width), 100, dtype=np.uint8) # Blue plane (some blue)
color_image = cv2.merge([B, G, R])
cv2.imshow("Color Image from R, G, B Planes", color_image)
cv2.waitKey(0)
cv2.destroyAllWindows()
import cv2
import numpy as np
import matplotlib.pyplot as plt
image = cv2.imread('your_image.jpg', cv2.IMREAD_GRAYSCALE)
row = image.shape[0] // 2 # Middle row
profile = image[row, :] # Intensity values along that row
image_with_line = cv2.cvtColor(image, cv2.COLOR_GRAY2BGR)
cv2.line(image_with_line, (0, row), (image.shape[1], row), (0, 0, 255), 1)
cv2.imshow("Image with Profile Line", image_with_line)
plt.figure(figsize=(10, 4))
plt.title(f'Intensity Profile of Row {row}')
plt.plot(profile, color='black')
plt.xlabel('Column Index')
plt.ylabel('Intensity')
plt.grid(True)
plt.tight_layout()
plt.show()
cv2.waitKey(0)
cv2.destroyAllWindows()
First be sure that gedit is already installed in your system.
If it is not installed, run this command
sudo apt install gedit # version 46.1-3
Next run :
sudo apt update
Now, run these following commands to install opencv in your ubuntu operating system.
sudo apt install libopencv-dev python3-opencv
Check opencv version:
python3 -c "import cv2; print(cv2.__version__)"
After installing, you can check wheather your program is properly running or not, you can simply write a sample code like....
To create python file : gedit p1.py
import cv2 img = cv2.imread("/home/arik/Downloads/image.jpeg", cv2.IMREAD_GRAYSCALE) cv2.imshow('image',img) cv2.waitKey(0) cv2.destroyAllWindows()
Here is the above given image:
To run : python3 p1.py
If output is,
So, your installation is successfull.
#include<iostream>
using namespace std;
int main()
{
int n;
cout<<"Enter total number of vertices"<<endl;
cin>>n;
//matrix
int a[n][n];
int i,j,k;
cout<<"Input the value of adjacency matrix"<<endl;
for(i=0;i<n;i++)
{
cout<<"Enter the value of "<<i+1<<"row";
for(j=0;j<n;j++)
{
cin>>a[i][j];
}
}
//display cost matrix
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
cout<<a[i][j]<<" ";
}
cout<<endl;
}
// algo
for(k=0;k<n;k++)
{
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
a[i][j]=a[i][j] || (a[i][k] && a[k][j]);
}
}
}
//diaplay
cout<<"output matrix"<<endl;
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
cout<<a[i][j]<<" ";
}
cout<<endl;
}
}
#include<iostream>
using namespace std;
int main()
{
int n;
cout<<"Enter total number of vertices"<<endl;
cin>>n;
//matrix
int a[n][n];
int i,j,k;
cout<<"Input the value of adjacency matrix"<<endl;
for(i=0;i<n;i++)
{
cout<<"Enter the value of "<<i+1<<"row";
for(j=0;j<n;j++)
{
cin>>a[i][j];
}
}
//display adjacency matrix
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
cout<<a[i][j]<<" ";
}
cout<<endl;
}
//floyd algo
for(k=0;k<n;k++)
{
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
if(a[i][j]>a[i][k]+a[k][j])
{
a[i][j]=a[i][k]+a[k][j];
}
}
}
}
//diaplay
cout<<"output matrix"<<endl;
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
cout<<a[i][j]<<" ";
}
cout<<endl;
}
}
Q.EMPLOYEE TABLE
create table EMP(eid number, ename varchar2(20),age number,salary number,company varchar2(60));
insert into EMP values (1,'raju',30,30000,'TCS');
insert into EMP values (2,'indu',35,40000,'IBM');
insert into EMP values (3,'kalia',40,50000,'CTS');
select *
from EMP;
drop table EMP;
select *
from EMP
where company='TCS';
select ename
from EMP
where salary>=40000;
select ename
from EMP
where age<=35 and salary>=40000;
select ename
from EMP
where age<=35 or salary>=40000;
select min(salary)
from EMP;
select min(salary) as minimum_salary
from EMP;
select max(salary)
from EMP;
select max(salary) as maximum_salary
from EMP;
select avg(salary)
from EMP;
select avg(salary) as average_salary
from EMP;
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
create table EMP(eid number, ename varchar2(20),age number,salary number,company varchar2(60));
insert into EMP values (1,'raju',30,30000,'TCS');
insert into EMP values (2,'indu',35,40000,'IBM');
insert into EMP values (3,'kalia',40,50000,'CTS');
select *
from EMP;
drop table EMP;
select *
from EMP
where company='TCS';
select ename
from EMP
where salary>=40000;
select ename
from EMP
where age<=35 and salary>=40000;
select ename
from EMP
where age<=35 or salary>=40000;
select min(salary)
from EMP;
select min(salary) as minimum_salary
from EMP;
select max(salary)
from EMP;
select max(salary) as maximum_salary
from EMP;
select avg(salary)
from EMP;
select avg(salary) as average_salary
from EMP;
select ename
from EMP
where salary=(select max(salary)
from EMP);
select ename
from EMP
where salary=(select min(salary)
from EMP);
select ename
from EMP
where salary>=(select avg(salary)
from EMP);
select ename
from EMP
where age=(select max(age)
from EMP);
select ename
from EMP
where salary>(select salary
from EMP
where ename='raju');
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
update EMP set company='TCS'
where eid=1;
select * from EMP;
update EMP set company='IBM'
where eid=2;
select * from EMP;
update EMP set company='CTS'
where eid=3;
select * from EMP;
update EMP set age=age+1;
select * from EMP;
