Hello, may I ask which cameras armsom-w3 supports

where should i buy.and Is there any relevant documentation? How to use this camera

Hello. ArmSom-W3 supports imx415 camera. You can connect the imx415 to the board-side mipi-csi interface to run the multimedia camera application to preview the camera images.

May I ask what application you use to open the camera to preview the screen?

You can use the V4L2 application that comes with the system to open the camera. Or find customers to get the camera application software developed by engineers to preview the camera images.