private static void ProcessPotentialMergeBlock(ref int i)
{
if (TryClassifyAsSymbol(blocks[i]))
{
return;
}
TextBlock mergePreviousBlock = null;
bool isPreviousMergeValid = TryMergeToPreviousBlock(i, ref mergePreviousBlock);
TextBlock mergeNextBlock = null;
bool isNextMergeValid = TryMergeToNextBlock(i, ref mergeNextBlock, ref isPreviousMergeValid);
if (isPreviousMergeValid && isNextMergeValid)
{
DetermineMergeDirection(i, mergePreviousBlock, ref isPreviousMergeValid, mergeNextBlock, ref isNextMergeValid);
}
if (isPreviousMergeValid)
{
JoinPreviousMergeBlockToListBlock(ref i, mergePreviousBlock);
return;
}
if (isNextMergeValid)
{
JoinNextMergeBlockToListBlock(i, mergeNextBlock);
return;
}
if (!isHorizontalText)
{
if (VerticalTextProjection.GetMaxWidthPostionPercentToNeightbor(blocks, i) > VerticalTextProjection.MARK_WIDTH_POSITION_PERCENT)
{
var lineIndex = blocks[i].LineIndex;
var avgGapIntra = VerticalTextProjection.AvgGapIntraChars[lineIndex];
if (lineIndex == blocks[i - 1].LineIndex && blocks[i].Top - blocks[i - 1].Bottom <= avgGapIntra && mergePreviousBlock != null)
{
JoinPreviousMergeBlockToListBlock(ref i, mergePreviousBlock);
return;
}
else if (lineIndex == blocks[i + 1].LineIndex && blocks[i + 1].Top - blocks[i].Bottom <= avgGapIntra && mergeNextBlock != null)
{
JoinNextMergeBlockToListBlock(i, mergeNextBlock);
return;
}
}
}
isPreviousMerge = false;
}
private static List <TextBlock> ProcessVerticalLines(GrayImage image, uint[] horizontal)
{
List <TextBlock> textBlocks = new List <TextBlock>();
List <SplitMultiLines.Line> textLines = SplitMultiLines.SplitProjectDensity(horizontal);
textLines.Reverse(); //Japanese column is going from right to left
for (int i = 0; i < textLines.Count; i++)
{
var density = Projection.ProjectSubImageOnVerticalLine(image, textLines[i]);
textBlocks.AddRange(VerticalTextProjection.FindAllTextBlock(image, density, textLines[i], i));
}
return(textBlocks);
}
private static float CaluculateValidGap(int blockIndex, char text)
{
if (isHorizontalText)
{
float avgGap = HorizontalTextProjection.AvgGapBlocks[blocks[blockIndex].LineIndex];
float percent = HorizontalTextProjection.GetMaxHeightPostionPercentToNeightbor(blocks, blockIndex);
if (text == '、' || text == 'ｌ' || text == 'ノ')
{
if (percent > HorizontalTextProjection.MARK_HEIGH_POSITION_PERCENT)
{
return(2f * avgGap);
}
}
else if (text == 'し')
{
return((float)Math.Ceiling(avgGap * 2f));
}
else if (percent > HorizontalTextProjection.MARK_HEIGH_POSITION_PERCENT)
{
return(1.5f * avgGap);
}
return(avgGap);
}
else
{
float percent = VerticalTextProjection.GetMaxWidthPostionPercentToNeightbor(blocks, blockIndex);
if (percent > VerticalTextProjection.MARK_WIDTH_POSITION_PERCENT)
{
return(VerticalTextProjection.AvgGapBlocks[blocks[blockIndex].LineIndex] * 1.5f);
}
else
{
return(VerticalTextProjection.AvgGapBlocks[blocks[blockIndex].LineIndex]);
}
}
}
private static bool TryMergeToNextBlock(int i, ref TextBlock mergeNextBlock, ref bool isPreviousMergeValid)
{
if (blocks[i + 1].LineIndex != blocks[i].LineIndex)
{
return(false);
}
mergeNextBlock = null;
bool isNextMergeValid = false;
bool isCanMerge = IsCanMergeBlock(i + 1, blocks[i].Text[0]);
if (isCanMerge)
{
mergeNextBlock = ClassifyMergeBlock(i);
if (isHorizontalText)
{
ClassifyTextBlock(blocks[i + 1]);
if (blocks[i].Text[0] == 'し')
{
if (mergeNextBlock.Text[0] == 'い' && (blocks[i + 1].Text[0] == '、' || IsVerticalLineChar(blocks[i + 1].Text[0])))
{
isPreviousMergeValid = false;
isNextMergeValid = true;
}
}
else if (IsVerticalLineChar(blocks[i].Text[0]) && IsVerticalLineChar(blocks[i + 1].Text[0]) &&
blocks[i + 1].IsNeedOCRProcess && i + 2 < blocks.Count)
{
var temp = mergeNextBlock;
mergeNextBlock = TextBlock.CreateMergeHorizontalTextBlock(mergeNextBlock, blocks[i + 2]);
ClassifyTextBlock(mergeNextBlock);
isNextMergeValid = Array.BinarySearch <char>(HorizontalTextProjection.LeftMistakenLetters, mergeNextBlock.Text[0]) > -1;
if (isNextMergeValid)
{
blocks.RemoveAt(i);
blocks[i] = temp;
}
else
{
mergeNextBlock = temp;
}
}
else
{
isNextMergeValid = IsCanCombineToNext(mergeNextBlock, blocks[i].Text[0]);
}
}
else
{
isNextMergeValid = IsCanCombineToNext(mergeNextBlock, blocks[i].Text[0]);
if (isNextMergeValid &&
(mergeNextBlock.Text[0] == 'こ' ||
mergeNextBlock.Text[0] == 'ご' ||
mergeNextBlock.Text[0] == 'ニ' ||
mergeNextBlock.Text[0] == '二'))
{
if (blocks[i].Width < 0.5f * blocks[i + 1].Width)
{
return(false);
}
VerticalTextProjection.FindBlockType(mergeNextBlock);
var index = i + 2;
if (mergeNextBlock.Type < TextBlockType.Single &&
index < blocks.Count &&
blocks[index].Type == TextBlockType.Mark &&
blocks[index].Width > 0.8f * mergeNextBlock.Width)
{
var temp = mergeNextBlock;
mergeNextBlock = TextBlock.CreateMergeVerticalTextBlock(mergeNextBlock, blocks[i + 2]);
ClassifyTextBlock(mergeNextBlock);
if (mergeNextBlock.Text[0] == '三' || mergeNextBlock.Text[0] == 'ミ')
{
blocks.RemoveAt(i);
blocks[i] = temp;
}
else
{
mergeNextBlock = temp;
}
}
}
}
}
else if (!isHorizontalText)
{
ProcessSpecialCasesInVerticalLayout(i, ref mergeNextBlock, ref isNextMergeValid);
}
return(isNextMergeValid);
}