Hotfix MRZ improvement

[nicholemnl]

Issue

134 MRZ Improvement

Changes

1. Improve scanning with mrz by fixing the setResolution to 640x480
2. Improve cropping by guide bounding box
3. Add API config option to show guide bounding box

[jeremi]

Why does setting the image size to 640x480 improve the reading of the MRZ?

[nicholemnl]

Why does setting the image size to 640x480 improve the reading of the MRZ?

• Having an incorrect resolution makes the scanned image blur or pixilated simply because it tries to match the size forcefully.

• By default it captured a landscape image meaning the width should be wider than its height

• the PreviewView default is FILL_CENTER, meaning it will try to fill the entire PreviewView which is “landscape” (mention above) https://developer.android.com/reference/androidx/camera/view/PreviewView.ScaleType#FILL_CENTER

• For evidence, I have attached a comparison between two scanned image 480x640 vs 640x480

[nicholemnl]

This would also resolves newlogic/smartscanner-core/issues/133

[jeremi]

@nicholemnl should this still be merged?

[nicholemnl]

Yes im gonna merge it now.