protected void PlotImage(Graphics graphics, IotaVtiOcrProcessor stateManager, bool isOddField)
{
if (stateManager.BlockOffsetsX != null &&
stateManager.BlockOffsetsX.Length == IotaVtiOcrProcessor.MAX_POSITIONS &&
stateManager.BlockOffsetsX[1] > 0)
{
for (int i = 0; i < IotaVtiOcrProcessor.MAX_POSITIONS; i++)
{
if (stateManager.BlockOffsetsX[i] > 0)
{
graphics.DrawRectangle(
Pens.Chartreuse,
stateManager.BlockOffsetsX[i],
stateManager.BlockOffsetY(isOddField),
stateManager.BlockWidth,
stateManager.BlockHeight);
}
}
}
else
{
graphics.DrawRectangle(
Pens.Chartreuse,
0,
stateManager.BlockOffsetY(isOddField),
m_Width,
stateManager.BlockHeight);
}
}
private int GetLastFrameNoDigitStartPosition(IotaVtiOcrProcessor stateManager)
{
uint[] result = new uint[m_CalibratedPositons[0].Image.Length];
for (int i = 0; i < m_CalibratedPositons.Count - 2; i++)
{
uint[] prev = m_CalibratedPositons[i].Image;
uint[] next = m_CalibratedPositons[i + 1].Image;
for (int j = 0; j < result.Length; j++)
{
int x = j % stateManager.CurrentImageWidth;
if (x > ROUTH_START_FRAME_NUMBER_BLOCKS && prev[j] != next[j])
{
result[j]++;
}
}
}
int bestRating = -1;
int bestStartPosition = -1;
int oneOfEvenOrOddY = stateManager.BlockOffsetY(false);
int TOTAL_PIXELS = result.Length;
for (int x = ROUTH_START_FRAME_NUMBER_BLOCKS; x < stateManager.CurrentImageWidth - stateManager.BlockWidth; x++)
{
int currentRating = 0;
for (int y = 0; y < stateManager.BlockHeight; y++)
{
for (int k = 0; k < stateManager.BlockWidth; k++)
{
int idx = x + k + (oneOfEvenOrOddY + y) * stateManager.CurrentImageWidth;
if (idx < TOTAL_PIXELS && result[idx] > 0)
{
currentRating++;
}
}
}
if (currentRating > bestRating)
{
bestStartPosition = x;
bestRating = currentRating;
}
}
return(bestStartPosition);
}
private void CalibrateBlockPositonsWidth(IotaVtiOcrProcessor stateManager, bool isOddField)
{
int maxRating = -1;
int bestWidth = -1;
var bestStartingPositions = new List <int>();
// Determined previously
int bestHeight = stateManager.BlockHeight;
int bestYOffs = stateManager.BlockOffsetY(isOddField);
int imageWidth = stateManager.CurrentImageWidth;
var startingPositions = new List <int>();
for (int width = m_MinBlockWidth; width <= m_MaxBlockWidth; width++)
{
int totalRating = 0;
startingPositions.Clear();
for (int x = 1; x < stateManager.CurrentImageWidth - width - 1; x++)
{
bool prevTwoVerticalsAreWhite = true;
for (int y = bestYOffs; y < bestYOffs + bestHeight + 1; y++)
{
if (y >= stateManager.CurrentImageHeight)
{
continue;
}
if (stateManager.CurrentImage[x - 1 + imageWidth * y] < 127 || stateManager.CurrentImage[x + imageWidth * y] < 127)
{
prevTwoVerticalsAreWhite = false;
break;
}
}
if (!prevTwoVerticalsAreWhite)
{
continue;
}
for (int y = bestYOffs; y < bestYOffs + bestHeight + 1; y++)
{
if (y >= stateManager.CurrentImageHeight)
{
continue;
}
if (stateManager.CurrentImage[x + 1 + imageWidth * y] < 127)
{
totalRating++;
if (stateManager.CurrentImage[x + width - 1 + imageWidth * y] < 127 &&
stateManager.CurrentImage[x + width + imageWidth * y] > 127 &&
stateManager.CurrentImage[x + width + 1 + imageWidth * y] > 127)
{
startingPositions.Add(x);
totalRating++;
}
}
}
}
if (totalRating > maxRating)
{
// Collect stats about the starting positions ??
maxRating = totalRating;
bestWidth = width;
bestStartingPositions.Clear();
bestStartingPositions.AddRange(startingPositions);
}
}
stateManager.BlockWidth = bestWidth;
var calibrationBlock = new CalibratedBlockPosition(stateManager.CurrentImage)
{
BlockWidth = bestWidth,
BlockHeight = bestHeight,
BlockOffsetY = bestYOffs,
BestStartingPositions = bestStartingPositions.ToArray(),
IsOddField = isOddField
};
m_CalibratedPositons.Add(calibrationBlock);
}
