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Using various card detection options for better card detection

Configuring the detection options

The CLOVA card detector SDK offers various options to detect clearer card images from the input images.
You can use various options such as light reflection detection and camera shake detection as follows:

val option = DetectCardOption(
  cardRatio = 1.5858f,
  targetAngle = 90, 
  angleOffset = 5,
  minimumSize = 0.65f,
  checkSideDetected = true,
  checkCameraShaky = true,
  accumulatedFrameCount = 10
)
Items Type Description
cardRatio float Percentage of cards to detect
targetAngle int The angle of the card to be detected is calculated as follows:
Angle
angleOffset int Angle offset
[targetAngle - angleOffset <= detection angle <= targetAngle + angleOffset]
minimumSize float Minimum area of the card to be detected (detection card area / card ROI zone cropRect)
checkSideDetected boolean Whether to detect and return the card sides (top, bottom, left, right)
checkCameraShaky boolean Whether to detect camera shake
accumulatedFrameCount Int Number of frames to accumulate when using shotCard()