Mobile App Development

I want a mobile app(Android or cross-platform such as React-Native or Flutter) to access the external camera connected through usb and show the feed in the screen after applying a few filters such as Histogram Equaliser. The app will be very simple and won't have more than 3 screens. Here is an android app link for reference https://play.google.com/store/apps/details?id=hu.szte.ipcg.opencvlivehistogramdemo

The budget will get effected depending on if your proposal is for Android only or cross-platform.