camera-service-api 1.0

Camera service grpc api

Camera service grpc API

Install

1. copy dist/camera_service_api-1.0-py3-none-any.whl to your PROJECT_ROOT
2. using pip install local package

pip install ./dist/camera_service_api-1.0-py3-none-any.whl

Dependencies

• grpcio 1.63.0
• protobuf 5.26.1

API

Get API Instance create_camera_service_api

• host , camera server host , e.g. localhost
• port , camera server port , e.g. 6000

# host 
api = create_camera_service_api(host, port)

Get All camera meta infos get_camera_metas

def get_camera_metas(self) -> List[CameraMeta]:
    ...     

metas = api.get_camera_metas()
for meta in metas:
    print(f"Camera modelName: {meta.modelName} - deviceVersion: {meta.deviceVersion}")
    print("get camera image serialNumber ", meta.serialNumber)
    print("get info ", meta.info)

CameraMeta

• cameraType , camera type , GIGE | u3v
• serialNumber : camera serial number ,
• modelName : model name
• manufactureName : manufacture name
• deviceVersion : device version
• userDefinedName : name defined by user
• info : Map[string,string] , ext info

Get live image by serial number

input camera serial number and return live image (jpg), bytes. and if return None means the camera maybe offline.

and using try .. except for catch exception

def get_image(self, sn: str) -> bytes:
    ...     

Example:

...
body = api.get_image(meta.serialNumber)
print(" body : ", len(body)  )

...

fopen = open('test.jpg', 'wb+')
fopen.write( body )
fopen.close()

...

Example

import time

import grpc

from services.cameras.camera_service_api import create_camera_service_api


max_test = 100

def test_camera_api(host, port):
    #
    api = create_camera_service_api(host, port)
    metas = api.get_camera_metas()
    for meta in metas:
        print(f"Camera modelName: {meta.modelName} - deviceVersion: {meta.deviceVersion}")
        print("get camera image serialNumber ", meta.serialNumber)
        print("get info ", meta.info)

        t1 = time.time()
        try:
        
            for i in range( max_test ):
                body = api.get_image(meta.serialNumber)
                print(" body : ", i, len(body)  )

        except Exception as e:
            print( e) 

        t2 = time.time()
        tt = t2-t1
        avg = tt / max_test
        print( f" Try {max_test} times get image , using {tt} , avg {avg} ")

        # fopen = open('body.jpg'.encode('utf-8'), 'wb+')
        # fopen.write( body, )
        # fopen.close()

# protect the entry point
if __name__ == '__main__':
    print("GRPC Version : {} ".format(grpc.__version__))
    test_camera_api("127.0.0.1", 6000)