iOS+Objective-C: Create a real time photo filter appIntroduction In this tutorial, we will create an iOS app with Objective-C which apply vignette effect and a cold-color filter and display the result in real time. The application will look like this: This tutorial will be divided into two parts. First part will use AVFoundation framework to capture camera input. Second part will use CoreImage to process the captured input and then display it on sc
