observe:roi: Instance Method

- (int) observe:(UIImage *) img roi:(const PxRectI *) roi;

References: PxRectI

Detects the document corners within a region of a frame and accumulates them into the current state.

Parameters

• img — The frame to process.
• roi — The region of interest within the frame to process, or nil for the whole frame.

Return Value

A bitwise combination of PxCutoutFlag values.