public int GetLastFrameNoDigitPosition(IotaVtiOcrProcessor stateManager)
{
for (int i = IotaVtiOcrProcessor.FIRST_FRAME_NO_DIGIT_POSITIONS; i <= IotaVtiOcrProcessor.MAX_POSITIONS; i++)
{
uint[] pixels = stateManager.GetBlockAtPosition(Image, i, IsOddField);
int nuberSignalPixels = pixels.Count(x => x < 127);
if (stateManager.IsMatchingSignature(nuberSignalPixels) /* Matches to blank block */)
{
return(i);
}
}
return(-1);
}
private static char OcrBlock(uint[] fieldPixels, IotaVtiOcrProcessor stateManager, int blockIndex, bool isOddField)
{
uint[] block = stateManager.GetBlockAtPosition(fieldPixels, blockIndex, isOddField);
s_DiffSignatures[0] = GetDiffSignature(block, stateManager.ZeroDigitPattern);
s_DiffDigits[0] = 0;
s_DiffSignatures[1] = GetDiffSignature(block, stateManager.OneDigitPattern);
s_DiffDigits[1] = 1;
s_DiffSignatures[2] = GetDiffSignature(block, stateManager.TwoDigitPattern);
s_DiffDigits[2] = 2;
s_DiffSignatures[3] = GetDiffSignature(block, stateManager.ThreeDigitPattern);
s_DiffDigits[3] = 3;
s_DiffSignatures[4] = GetDiffSignature(block, stateManager.FourDigitPattern);
s_DiffDigits[4] = 4;
s_DiffSignatures[5] = GetDiffSignature(block, stateManager.FiveDigitPattern);
s_DiffDigits[5] = 5;
s_DiffSignatures[6] = GetDiffSignature(block, stateManager.SixDigitPattern);
s_DiffDigits[6] = 6;
s_DiffSignatures[7] = GetDiffSignature(block, stateManager.SevenDigitPattern);
s_DiffDigits[7] = 7;
s_DiffSignatures[8] = GetDiffSignature(block, stateManager.EightDigitPattern);
s_DiffDigits[8] = 8;
s_DiffSignatures[9] = GetDiffSignature(block, stateManager.NineDigitPattern);
s_DiffDigits[9] = 9;
double maxStrictMatch = stateManager.BlockWidth * stateManager.BlockHeight / 12.0;
double maxMatch = stateManager.BlockWidth * stateManager.BlockHeight / 8.0;
int strictMatchesIdx = 0;
int matchesIdx = 0;
for (int i = 0; i < 10; i++)
{
if (s_DiffSignatures[i] < maxStrictMatch && strictMatchesIdx < MAX_MATCHES)
{
s_StrictMatches[strictMatchesIdx] = s_DiffDigits[i];
strictMatchesIdx++;
}
if (s_DiffSignatures[i] < maxMatch && matchesIdx < MAX_MATCHES)
{
s_Matches[matchesIdx] = s_DiffDigits[i];
matchesIdx++;
}
}
if (strictMatchesIdx == 1)
{
return(s_StrictMatches[0].ToString()[0]);
}
else if (strictMatchesIdx == 0 && matchesIdx == 1)
{
return(s_Matches[0].ToString()[0]);
}
else if (strictMatchesIdx > 1 || matchesIdx > 1)
{
var allMatches = new List <int>();
if (strictMatchesIdx > 1)
{
for (int i = 0; i < strictMatchesIdx; i++)
{
allMatches.Add(s_StrictMatches[i]);
}
}
else if (matchesIdx > 1)
{
for (int i = 0; i < matchesIdx; i++)
{
allMatches.Add(s_Matches[i]);
}
}
bool areAll8693Items = !allMatches.Any(x => x != 3 && x != 6 && x != 9 && x != 8);
if (areAll8693Items)
{
bool is8Present = allMatches.Contains(8);
bool is9Present = allMatches.Contains(9);
bool is6Present = allMatches.Contains(6);
bool is3Present = allMatches.Contains(3);
return(DistinguishEightFromSimilarChars(block, stateManager, is9Present, is6Present, is3Present, is8Present));
}
}
return(' ');
}
public void PrepareLastTwoDigitsFromTheFrameNumber(IotaVtiOcrProcessor stateManager)
{
LastFrameNoDigit = stateManager.GetBlockAtPosition(Image, stateManager.LastFrameNoDigitPosition, IsOddField);
SecondLastFrameNoDigit = stateManager.GetBlockAtPosition(Image, stateManager.LastFrameNoDigitPosition - 1, IsOddField);
}
