Core Image Tutorial: Getting Started

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This article looked relevant to what I am trying to do. Hence reposting here:

Detect border edges of a UIImage with white color background and crop it in Swift

Reposting from StackOverFlow: Detect border edges of a UIImage with white color background and crop it in Swift - Stack Overflow I have a UIImage with a background color It is shown in Orange color for visibility here but in reality it is white color for me. How can I detect the edges of the image and crop it to it’s shape? There are solutions posted in Objective-C but I am working in Swift 2.1.1 Also, the previous solutions have some limitations and are not complete like they don’t work f…