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ZXQRCodeFinderPattern.h 1.8KB

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  1. /*
  2. * Copyright 2012 ZXing authors
  3. *
  4. * Licensed under the Apache License, Version 2.0 (the "License");
  5. * you may not use this file except in compliance with the License.
  6. * You may obtain a copy of the License at
  7. *
  8. * http://www.apache.org/licenses/LICENSE-2.0
  9. *
  10. * Unless required by applicable law or agreed to in writing, software
  11. * distributed under the License is distributed on an "AS IS" BASIS,
  12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. * See the License for the specific language governing permissions and
  14. * limitations under the License.
  15. */
  16. #import "ZXResultPoint.h"
  17. /**
  18. * Encapsulates a finder pattern, which are the three square patterns found in
  19. * the corners of QR Codes. It also encapsulates a count of similar finder patterns,
  20. * as a convenience to the finder's bookkeeping.
  21. */
  22. @interface ZXQRCodeFinderPattern : ZXResultPoint
  23. @property (nonatomic, assign, readonly) int count;
  24. @property (nonatomic, assign, readonly) float estimatedModuleSize;
  25. - (id)initWithPosX:(float)posX posY:(float)posY estimatedModuleSize:(float)estimatedModuleSize;
  26. - (id)initWithPosX:(float)posX posY:(float)posY estimatedModuleSize:(float)estimatedModuleSize count:(int)count;
  27. //- (void)incrementCount;
  28. /**
  29. * Determines if this finder pattern "about equals" a finder pattern at the stated
  30. * position and size -- meaning, it is at nearly the same center with nearly the same size.
  31. */
  32. - (BOOL)aboutEquals:(float)moduleSize i:(float)i j:(float)j;
  33. /**
  34. * Combines this object's current estimate of a finder pattern position and module size
  35. * with a new estimate. It returns a new ZXFinderPattern containing a weighted average
  36. * based on count.
  37. */
  38. - (ZXQRCodeFinderPattern *)combineEstimateI:(float)i j:(float)j newModuleSize:(float)newModuleSize;
  39. @end