Requirement: Working with Camera control in power apps
Create a Blank Canvas app
- On Screen 1
- insert Camera control
- Dropdown
- Icon
- Image
Camera control- Camera Property: Dropdown2.Selected.Id

Dropdown control- OnSelect Property: Camera.AvailableDevice

Can change the effect of the camera
On Image control- Image Property: VarTakenPhoto

On icon- OnSelect Property: Set(VarTakenPhoto,Camera4.Stream)

- Now click on new screen
- Add picture control to the screen
Now the next screen is for Uploading the image
- Tap or click to add picture
- add image from device
- click on Open Button then it navigates to Image screen

After adding Image from the device , here is the formula automatically displays for image as shown in below:

Image Control