/// <summary> <p>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>
///
/// <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
///
/// </summary>
/// <param name="stateCount">reading state module counts from horizontal scan
/// </param>
/// <param name="i">row where finder pattern may be found
/// </param>
/// <param name="j">end of possible finder pattern in row
/// </param>
/// <returns> true if a finder pattern candidate was found this time
/// </returns>
protected internal virtual bool handlePossibleCenter(int[] stateCount, int i, int j)
{
int stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2] + stateCount[3] + stateCount[4];
float centerJ = centerFromEnd(stateCount, j);
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float centerI = crossCheckVertical(i, (int)centerJ, stateCount[2], stateCountTotal);
if (!System.Single.IsNaN(centerI))
{
// Re-cross check
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
centerJ = crossCheckHorizontal((int)centerJ, (int)centerI, stateCount[2], stateCountTotal);
if (!System.Single.IsNaN(centerJ))
{
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float estimatedModuleSize = (float)stateCountTotal / 7.0f;
bool found = false;
int max = possibleCenters.Count;
for (int index = 0; index < max; index++)
{
FinderPattern center = (FinderPattern)possibleCenters[index];
// Look for about the same center and module size:
if (center.aboutEquals(estimatedModuleSize, centerI, centerJ))
{
center.incrementCount();
found = true;
break;
}
}
if (!found)
{
ResultPoint point = new FinderPattern(centerJ, centerI, estimatedModuleSize);
possibleCenters.Add(point);
if (resultPointCallback != null)
{
resultPointCallback.foundPossibleResultPoint(point);
}
}
return(true);
}
}
return(false);
}
/// <summary>
/// <p>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>
///
/// <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
/// </summary>
/// <param name="stateCount"> reading state module counts from horizontal scan </param>
/// <param name="i"> row where finder pattern may be found </param>
/// <param name="j"> end of possible finder pattern in row </param>
/// <returns> true if a finder pattern candidate was found this time </returns>
protected internal bool 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;
bool found = false;
for (int index = 0; index < possibleCenters.Count; index++)
{
FinderPattern center = possibleCenters[index];
// Look for about the same center and module size:
if (center.aboutEquals(estimatedModuleSize, centerI, centerJ))
{
possibleCenters[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);
}
/**
* <p>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>
*
* <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
*/
private bool 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 (!Single.IsNaN(centerI))
{
// Re-cross check
centerJ = crossCheckHorizontal((int)centerJ, (int)centerI, stateCount[2], stateCountTotal);
if (!Single.IsNaN(centerJ))
{
float estimatedModuleSize = (float)stateCountTotal / 7.0f;
bool found = false;
int max = possibleCenters.Count;
for (int index = 0; index < max; index++)
{
FinderPattern center = (FinderPattern)possibleCenters[index];
// Look for about the same center and module size:
if (center.aboutEquals(estimatedModuleSize, centerI, centerJ))
{
center.incrementCount();
found = true;
break;
}
}
if (!found)
{
possibleCenters.Add(new FinderPattern(centerJ, centerI, estimatedModuleSize));
}
return(true);
}
}
return(false);
}