The process for resetting your Hikvision camera to default manufacturer’s settings depends on whether or not your camera has a push resent button.
Most Hikvision camera that come with an in-built SD card slot (EDGE Memory) have a push button. In Hikvision model nomenclature the Edge memory is denoted by the letter ‘F’ (for Flash). More details about Hikvision nomenclature can be found here.
Your camera has a push reset button
Unplug the power supply.
Press and hold the reset button.
Plug the power supply back in whilst still holding the reset button.
Keep holding the reset button for another 10-15 seconds.
Release the button.
Wait until the camera has rebooted.

If your camera does not have a reset button
As long as you remember your password, you should be able to reset and reboot your camera by logging into your camera.
Click on the ‘Configuration tab’
Go to ‘Maintenance section’
Click on ‘Restore all parameters to default setting’
Click ‘Reboot’ (although most camera will reboot automatically at step 3)

If your camera does not have a reset button and you cannot log-in
If you cannot log into your device (presumably because you forgot your password), then you will need to follow the ‘Password Recovery Procedure’