So in this project I’ve coded in an application where you can select a rectangular portion from the video display screen and create a copy of that selected portion
Demo:
Things Required:
- Jetson Nano
- Keyboard
- Mouse
- HDMI Screen
- Raspberry Pi Camera
- External Power Supply
Reference Material:
- You can check out this video for the project: (LINK)
Code:
Note that code below is in python
View on/Download from Github: (LINK)
import cv2
goFlag=0
def mouse_click(event, x, y, flags, params):
global x1,y1,x2,y2
global goFlag
if event == cv2.EVENT_LBUTTONDOWN:
x1=x
y1=y
goFlag=0
if event == cv2.EVENT_LBUTTONUP:
x2=x
y2=y
goFlag=1
cv2.namedWindow('nanoCam')
cv2.setMouseCallback('nanoCam', mouse_click)
dispW=640
dispH=480
flip=2
camSet='nvarguscamerasrc ! video/x-raw(memory:NVMM), width=3264, height=2464, format=NV12, framerate=21/1 ! nvvidconv flip-method='+str(flip)+' ! video/x-raw, width='+str(dispW)+', height='+str(dispH)+', format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink'
cam=cv2.VideoCapture(camSet)
while True:
ret, frame = cam.read()
if goFlag==1:
frame=cv2.rectangle(frame, (x1,y1),(x2,y2),(0,0,0),3)
roi=frame[y1:y2, x1:x2]
cv2.imshow('Copy', roi)
cv2.imshow('nanoCam', frame)
if cv2.waitKey(1)==ord('q'):
break
cam.release()
cv2.destroyAllWindows()
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