/**
* This is called when a horizontal scan finds a possible alignment pattern. It will cross check
* with a vertical scan, and if successful, will, ah, cross-cross-check with another horizontal
* scan. This is needed primarily to locate the real horizontal center of the pattern in cases of
* extreme skew.
*
* <p>If that succeeds the finder pattern location is added to a list that tracks the number of
* times each location has been nearly-matched as a finder pattern. Each additional find is more
* evidence that the location is in fact a finder pattern center
*
* @param stateCount reading state module counts from horizontal scan
* @param i row where finder pattern may be found
* @param j end of possible finder pattern in row
* @return true if a finder pattern candidate was found this time
*/
protected final boolean handlePossibleCenter(int[] stateCount, int i, int j) {
int stateCountTotal =
stateCount[0] + stateCount[1] + stateCount[2] + stateCount[3] + stateCount[4];
float centerJ = centerFromEnd(stateCount, j);
float centerI = crossCheckVertical(i, (int) centerJ, stateCount[2], stateCountTotal);
if (!Float.isNaN(centerI)) {
// Re-cross check
centerJ = crossCheckHorizontal((int) centerJ, (int) centerI, stateCount[2], stateCountTotal);
if (!Float.isNaN(centerJ)) {
float estimatedModuleSize = (float) stateCountTotal / 7.0f;
boolean found = false;
for (int index = 0; index < possibleCenters.size(); index++) {
FinderPattern center = possibleCenters.get(index);
// Look for about the same center and module size:
if (center.aboutEquals(estimatedModuleSize, centerI, centerJ)) {
possibleCenters.set(
index, center.combineEstimate(centerI, centerJ, estimatedModuleSize));
found = true;
break;
}
}
if (!found) {
FinderPattern point = new FinderPattern(centerJ, centerI, estimatedModuleSize);
possibleCenters.add(point);
if (resultPointCallback != null) {
resultPointCallback.foundPossibleResultPoint(point);
}
}
return true;
}
}
return false;
}
protected final boolean handlePossibleCenter(int[] paramArrayOfInt, int paramInt1, int paramInt2)
{
int i = paramArrayOfInt[0] + paramArrayOfInt[1] + paramArrayOfInt[2] + paramArrayOfInt[3] + paramArrayOfInt[4];
float f1 = centerFromEnd(paramArrayOfInt, paramInt2);
float f2 = crossCheckVertical(paramInt1, (int)f1, paramArrayOfInt[2], i);
if (!Float.isNaN(f2))
{
float f3 = crossCheckHorizontal((int)f1, (int)f2, paramArrayOfInt[2], i);
if (!Float.isNaN(f3))
{
float f4 = i / 7.0F;
for (int j = 0;; j++)
{
int k = this.possibleCenters.size();
int m = 0;
if (j < k)
{
FinderPattern localFinderPattern2 = (FinderPattern)this.possibleCenters.get(j);
if (localFinderPattern2.aboutEquals(f4, f2, f3))
{
this.possibleCenters.set(j, localFinderPattern2.combineEstimate(f2, f3, f4));
m = 1;
}
}
else
{
if (m == 0)
{
FinderPattern localFinderPattern1 = new FinderPattern(f3, f2, f4);
this.possibleCenters.add(localFinderPattern1);
if (this.resultPointCallback != null) {
this.resultPointCallback.foundPossibleResultPoint(localFinderPattern1);
}
}
return true;
}
}
}
}
return false;
}