protected void SourceFetch(bool isFirst, ScanDirection direction, Range range, object startId = null)
{
//Grab data from current connection...
var set = _db.GetRange(TableNodeColumns(), range, MaxLimit, startId);
ProcessFetchData(set, isFirst, direction);
}
private void InitVariables()
{
scanPixelsDict = new Dictionary <int, string>();
scanPixelsDict.Add(256, "256x256");
scanPixelsDict.Add(512, "512x512");
scanPixelsDict.Add(1024, "1024x1024");
scanPixelsDict.Add(2048, "2048x2048");
scanPixelsDict.Add(4096, "4096x4096");
galvNumDict = new Dictionary <GalvSystem, string>();
galvNumDict.Add(GalvSystem.TwoGalv, "双振镜");
galvNumDict.Add(GalvSystem.ThreeGalv, "三振镜");
scanDirectionDict = new Dictionary <ScanDirection, string>();
scanDirectionDict.Add(ScanDirection.Single, "单向");
scanDirectionDict.Add(ScanDirection.Double, "双向");
galvResponseTime = DEFAULT_GALV_RESPONSE_TIME;
fieldSize = DEFAULT_FIELD_SIZE;
scanPixels = DEFAULT_SCAN_PIXELS;
pixelTime = DEFAULT_PIXEL_TIME;
calibrationVoltage = DEFAULT_CALIBRATION_VOLTAGE;
curveCoff = DEFAULT_CURVE_COFF;
galvNum = DEFAULT_GALV_SYSTEM;
scanDirection = DEFAULT_SCAN_DIRECTION;
}
private void ParseDataLine(string line, ScanDirection direction)
{
if (string.IsNullOrWhiteSpace(line))
{
return;
}
char[] charSeparators = { ';' }; // fields are separated by semicolons
string[] tokens = line.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length != 5)
{
return;
}
DataMask = long.Parse(tokens[2]); // the data mask is hopefully always the same
int scanLineLength = int.Parse(tokens[1]);
DateTime timeStamp = ParseTimeToken(tokens[0]);
if (direction == ScanDirection.Forward)
{
ForwardProfileLengths.Add(scanLineLength);
forwardTimeStamps.Add(timeStamp);
}
if (direction == ScanDirection.Backward)
{
BackwardProfileLengths.Add(scanLineLength);
backwardTimeStamps.Add(timeStamp);
}
}
private void SelectedIndexChanged(object sender, EventArgs e)
{
if (sender.Equals(cbxPixels) && cbxPixels.SelectedItem != null)
{
int past = scanPixels;
scanPixels = ((KeyValuePair <int, string>)cbxPixels.SelectedItem).Key;
if (past != scanPixels)
{
Logger.Info(string.Format("change scan pixels from [{0}] to [{1}].", past, scanPixels));
}
}
else if (sender.Equals(cbxGalvNum) && cbxGalvNum.SelectedItem != null)
{
GalvSystem past = galvNum;
galvNum = ((KeyValuePair <GalvSystem, string>)cbxGalvNum.SelectedItem).Key;
if (past != galvNum)
{
Logger.Info(string.Format("change galv num from [{0}] to [{1}].", past, galvNum));
}
}
else if (sender.Equals(cbxDirection) && cbxDirection.SelectedItem != null)
{
ScanDirection past = scanDirection;
scanDirection = ((KeyValuePair <ScanDirection, string>)cbxDirection.SelectedItem).Key;
if (scanDirection != past)
{
Logger.Info(string.Format("change scan direction from [{0}] to [{1}].", past, scanDirection));
}
}
}
public List <string> ScanBitmap(WriteableBitmap bmp, int numscans, ScanDirection direction, BarcodeType types)
{
List <string> result = new List <string>();
Parser parser = new Parser();
int height = direction == ScanDirection.Horizontal ? bmp.PixelWidth : bmp.PixelHeight;
if (numscans > height)
{
numscans = height; // fix for doing full scan on small images
}
for (int i = 0; i < numscans; i++)
{
int y1 = (i * height) / numscans;
int y2 = ((i + 1) * height) / numscans;
string codesRead = parser.ReadBarcodes(bmp, y1, y2, direction, types);
if (!string.IsNullOrEmpty(codesRead))
{
result.AddRange(codesRead.Split('|'));
}
}
return(result);
}
private double[] AllProfiles(int column, ScanDirection scanDirection)
{
// range checks are performed already
double[] resultProfile = new double[NumberTotalPoints];
if (scanDirection == ScanDirection.Forward)
{
if (fwdMatrix == null)
{
return(InvalidProfileAll());
}
for (int i = 0; i < NumberTotalPoints; i++)
{
resultProfile[i] = fwdMatrix[column, i];
}
}
if (scanDirection == ScanDirection.Backward)
{
if (bwdMatrix == null)
{
return(InvalidProfileAll());
}
for (int i = 0; i < NumberTotalPoints; i++)
{
resultProfile[i] = bwdMatrix[column, i];
}
// if profile == XYvec than reverse profile
if (column == columnNumberOfXYvec)
{
Array.Reverse(resultProfile);
}
}
return(resultProfile);
}
private double[] SingleProfile(int column, int profileIndex, ScanDirection scanDirection)
{
// range checks are performed already
double[] resultProfile = new double[scanMetaData.NumberOfDataPoints];
int offset = scanMetaData.NumberOfDataPoints * (profileIndex - 1);
if (scanDirection == ScanDirection.Forward)
{
if (fwdMatrix == null)
{
return(InvalidProfile());
}
for (int i = 0; i < scanMetaData.NumberOfDataPoints; i++)
{
resultProfile[i] = fwdMatrix[column, i + offset];
}
}
if (scanDirection == ScanDirection.Backward)
{
if (bwdMatrix == null)
{
return(InvalidProfile());
}
for (int i = 0; i < scanMetaData.NumberOfDataPoints; i++)
{
resultProfile[i] = bwdMatrix[column, i + offset];
}
// if profile == XYvec than reverse profile
if (column == columnNumberOfXYvec)
{
Array.Reverse(resultProfile);
}
}
return(resultProfile);
}
private void Stack(Program program, Database db, Order order, Order key, TableNode node)
{
_key = key;
OrderColumn column = order.Columns[order.Columns.Count - 1];
_direction = column.Ascending ? ScanDirection.Forward : ScanDirection.Backward;
_order = new Order();
_order.Columns.Add(column);
_nestedOrder = new Order();
for (int i = 0; i < order.Columns.Count - 1; i++)
{
_nestedOrder.Columns.Add(order.Columns[i]);
}
_nestedComparer = new RowComparer(_nestedOrder.Columns[_nestedOrder.Columns.Count - 1], Program.ValueManager);
_comparer = new RowComparer(_order.Columns[0], Program.ValueManager);
if (_nestedOrder.Columns.Count == 1)
{
FastoreCursor scan = new FastoreCursor(program, db, node);
scan.Key = key;
scan.Direction = _nestedOrder.Columns[0].Ascending ? ScanDirection.Forward : ScanDirection.Backward;
scan.Node.Order = _nestedOrder;
_nestedTable = scan;
}
else
{
_nestedTable = new FastoreStackedCursor(program, db, _nestedOrder, key, node);
}
}
private void ClearTopographyData(ScanDirection direction)
{
double[] invalidDataLine = Enumerable.Repeat(double.NaN, NumberOfColumns).ToArray();
for (int i = 0; i < NumberTotalPoints; i++)
{
InsertDataLineAt(invalidDataLine, i, direction);
}
}
public TableScan(IValueManager manager, NativeTable table, Schema.Order key, ScanDirection direction, Row firstKey, Row lastKey) : base(manager, table.TableType)
{
_nativeTable = table;
_key = key;
_direction = direction;
_firstKey = firstKey;
_lastKey = lastKey;
}
/// <remarks> Scan range keys are inclusive. </remarks>
public Scan(ServerProcess AProcess, TableBuffer ATable, TableBufferIndex AAccessPath, ScanDirection ADirection, Row AFirstKey, Row ALastKey)
{
FProcess = AProcess;
FTable = ATable;
FAccessPath = AAccessPath;
FDirection = ADirection;
FFirstKey = AFirstKey;
FLastKey = ALastKey;
}
/// <remarks> Scan range keys are inclusive. </remarks>
public Scan(IValueManager manager, NativeTable table, NativeRowTree accessPath, ScanDirection direction, IRow firstKey, IRow lastKey)
{
_manager = manager;
_table = table;
_accessPath = accessPath;
_direction = direction;
_firstKey = firstKey;
_lastKey = lastKey;
}
protected void SourceFetch(bool isFirst, ScanDirection direction)
{
SourceFetch
(
isFirst,
direction,
CreateRange(direction, null, null),
!isFirst ? GetStartId(direction) : null
);
}
public async Task ScanAsync(
string partitionId,
long indexStart,
ScanDirection direction,
Func <long, object, ScanCallbackResult> consume,
int limit = int.MaxValue)
{
SortDefinition <Chunk> sort;
FilterDefinition <Chunk> filter;
if (direction == ScanDirection.Forward)
{
sort = Builders <Chunk> .Sort.Ascending(x => x.Index);
filter = Builders <Chunk> .Filter.And(
Builders <Chunk> .Filter.Eq(x => x.PartitionId, partitionId),
Builders <Chunk> .Filter.Gte(x => x.Index, indexStart)
);
}
else
{
sort = Builders <Chunk> .Sort.Descending(x => x.Index);
filter = Builders <Chunk> .Filter.And(
Builders <Chunk> .Filter.Eq(x => x.PartitionId, partitionId),
Builders <Chunk> .Filter.Lte(x => x.Index, indexStart)
);
}
var options = new FindOptions <Chunk>()
{
Sort = sort
};
if (limit != int.MaxValue)
{
options.Limit = limit;
}
using (var cursor = await _chunks.FindAsync(filter, options))
{
while (await cursor.MoveNextAsync())
{
var batch = cursor.Current;
foreach (var b in batch)
{
if (ScanCallbackResult.Stop == consume(b.Index, b.Payload))
{
return;
}
}
}
}
}
private void UpdateVariables()
{
galvResponseTime = double.Parse(tbxResponseTime.Text);
fieldSize = double.Parse(tbxFieldSize.Text);
scanPixels = ((KeyValuePair <int, string>)cbxPixels.SelectedItem).Key;
pixelTime = double.Parse(tbxPixelTime.Text);
calibrationVoltage = double.Parse(tbxCalibrationV.Text);
curveCoff = double.Parse(tbxCurveCoff.Text);
galvNum = ((KeyValuePair <GalvSystem, string>)cbxGalvNum.SelectedItem).Key;
scanDirection = ((KeyValuePair <ScanDirection, string>)cbxDirection.SelectedItem).Key;
}
protected Range CreateRange(ScanDirection direction, RangeBound?start, RangeBound?end)
{
Range range = new Range();
range.ColumnID = GetOrderColumnID();
range.Ascending = direction == ScanDirection.Forward;
range.Start = start;
range.End = end;
return(range);
}
private string GetFileName(ScanDirection direction, string extension, int index)
{
switch (direction)
{
case ScanDirection.Forward:
return(GetFwdFileName(extension, index));
case ScanDirection.Backward:
return(GetBwdFileName(extension, index));
default:
return(string.Empty);
}
}
public async Task ScanStoreAsync(
long sequenceStart,
ScanDirection direction,
Func <long, object, ScanCallbackResult> consume,
int limit = Int32.MaxValue,
CancellationToken cancellationToken = default(CancellationToken)
)
{
SortDefinition <Chunk> sort;
FilterDefinition <Chunk> filter;
if (direction == ScanDirection.Forward)
{
sort = Builders <Chunk> .Sort.Ascending(x => x.Id);
filter = Builders <Chunk> .Filter.Gte(x => x.Id, sequenceStart);
}
else
{
sort = Builders <Chunk> .Sort.Descending(x => x.Id);
filter = Builders <Chunk> .Filter.Lte(x => x.Id, sequenceStart);
}
var options = new FindOptions <Chunk>()
{
Sort = sort
};
if (limit != int.MaxValue)
{
options.Limit = limit;
}
using (var cursor = await _chunks.FindAsync(filter, options, cancellationToken))
{
while (await cursor.MoveNextAsync(cancellationToken))
{
var batch = cursor.Current;
foreach (var b in batch)
{
if (ScanCallbackResult.Stop == consume(b.Index, b.Payload))
{
return;
}
}
}
}
}
protected object GetStartId(ScanDirection direction)
{
// if current buffer direction is forward and a forward range is requested, use the row Id of the last row in the buffer
// If current buffer direction is forward and a backward range is requested, use the row Id of the first row in the buffer
// If current buffer direction is backward and a forward range is requested, use the row Id of the first row in the buffer
// If current buffer direction is backward and a backward range is requested, use the row Id of the last row in the buffer
if (_bufferDirection == direction)
{
return(_buffer[_buffer.Count - 1].ID);
}
else
{
return(_buffer[0].ID);
}
}
/// <summary>
/// Updates the User Interface.
/// </summary>
public override void UpdateUI()
{
_enableSetSettings = false;
ScanDirection scanDirection = BarcodeReaderSettings.ScanDirection;
directionLRCheckBox.Checked = (scanDirection & ScanDirection.LeftToRight) != 0;
directionRLCheckBox.Checked = (scanDirection & ScanDirection.RightToLeft) != 0;
directionTBCheckBox.Checked = (scanDirection & ScanDirection.TopToBottom) != 0;
directionBTCheckBox.Checked = (scanDirection & ScanDirection.BottomToTop) != 0;
directionAngle45CheckBox.Checked = (scanDirection & ScanDirection.Angle45and135) != 0;
UpdateDirection45();
_enableSetSettings = true;
}
public void ProcessFetchData(RangeSet fetchData, bool isFirst, ScanDirection direction)
{
ClearBuffer();
SetSourceFlags(fetchData);
_buffer = fetchData.Data;
_bufferDirection = direction;
//We are always going to point at the start of a new buffer.
if (_buffer.Count > 0 && !isFirst)
{
_bufferIndex = 0;
}
else
{
_bufferIndex = -1;
}
}
// This is used to populate the matrices line by line (usually during the file reading)
public void InsertDataLineAt(double[] dataLine, int position, ScanDirection scanDirection)
{
// some range checks
if (position >= NumberTotalPoints)
{
return;
}
if (position < 0)
{
return;
}
if (dataLine == null)
{
return;
}
if (dataLine.Length != NumberOfColumns)
{
return;
}
if (scanDirection == ScanDirection.Forward)
{
if (fwdMatrix == null)
{
return;
}
for (int i = 0; i < NumberOfColumns; i++)
{
fwdMatrix[i, position] = dataLine[i];
}
return;
}
if (scanDirection == ScanDirection.Backward)
{
if (bwdMatrix == null)
{
return;
}
for (int i = 0; i < NumberOfColumns; i++)
{
bwdMatrix[i, position] = dataLine[i];
}
}
}
/// <summary>
/// Creates an enumerable object which enumerates all locations within the rectangle
/// </summary>
/// <param name="direction">Specifies from which edge the scan should start</param>
/// <returns>Newly created enumerable object</returns>
public IEnumerable <MatrixLoc> AsEnumerable(ScanDirection direction)
{
switch (direction)
{
case ScanDirection.LeftToRight:
return(GetColumnFirstEnumerator(this.Column, this.LastColumn));
case ScanDirection.RightToLeft:
return(GetColumnFirstEnumerator(this.LastColumn - 1, this.Column - 1));
case ScanDirection.TopToBottom:
return(GetRowFirstEnumerator(this.Row, this.LastRow));
case ScanDirection.BottomToTop:
return(GetRowFirstEnumerator(this.LastRow - 1, this.Row - 1));
default:
throw new InvalidOperationException();
}
}
public Task ScanPartitionAsync(
string partitionId,
long fromIndexInclusive,
ScanDirection direction,
Func <long, object, ScanCallbackResult> consume,
long toIndexInclusive = Int64.MaxValue,
CancellationToken cancellationToken = default(CancellationToken)
)
{
lock (_lock)
{
Partition partition;
if (_partitions.TryGetValue(partitionId, out partition) == false)
{
return(Task.FromResult(0));
}
IEnumerable <Chunk> list = partition.Chunks.AsEnumerable();
if (direction == ScanDirection.Backward)
{
list = list.Reverse();
}
list = list.Where(x => x.Index >= fromIndexInclusive && x.Index <= toIndexInclusive);
foreach (var chunk in list)
{
cancellationToken.ThrowIfCancellationRequested();
if (consume(chunk.Index, chunk.Payload) == ScanCallbackResult.Stop)
{
break;
}
}
}
return(Task.FromResult(0));
}
public async Task ScanPartitionAsync(
string partitionId,
long fromIndexInclusive,
ScanDirection direction,
Func <long, object, ScanCallbackResult> consume,
long toIndexInclusive = Int64.MaxValue,
CancellationToken cancellationToken = default(CancellationToken)
)
{
var filter = Builders <Chunk> .Filter.And(
Builders <Chunk> .Filter.Eq(x => x.PartitionId, partitionId),
Builders <Chunk> .Filter.Gte(x => x.Index, fromIndexInclusive),
Builders <Chunk> .Filter.Lte(x => x.Index, toIndexInclusive)
);
var sort = direction == ScanDirection.Forward
? Builders <Chunk> .Sort.Ascending(x => x.Index)
: Builders <Chunk> .Sort.Descending(x => x.Index);
var options = new FindOptions <Chunk>()
{
Sort = sort
};
using (var cursor = await _chunks.FindAsync(filter, options, cancellationToken))
{
while (await cursor.MoveNextAsync(cancellationToken))
{
var batch = cursor.Current;
foreach (var b in batch)
{
if (ScanCallbackResult.Stop == consume(b.Index, b.Payload))
{
return;
}
}
}
}
}
/// <summary>
/// Sets the scan direction of reader settings.
/// </summary>
private void SetDirection()
{
if (!_enableSetSettings)
{
return;
}
_enableSetSettings = false;
UpdateDirection45();
ScanDirection scanDirection = ScanDirection.None;
if (directionLRCheckBox.Checked)
{
scanDirection |= ScanDirection.LeftToRight;
}
if (directionRLCheckBox.Checked)
{
scanDirection |= ScanDirection.RightToLeft;
}
if (directionTBCheckBox.Checked)
{
scanDirection |= ScanDirection.TopToBottom;
}
if (directionBTCheckBox.Checked)
{
scanDirection |= ScanDirection.BottomToTop;
}
if (directionAngle45CheckBox.Checked)
{
scanDirection |= ScanDirection.Angle45and135;
}
BarcodeReaderSettings.ScanDirection = scanDirection;
_enableSetSettings = true;
}
private void LoadIndexData(string fileName, ScanDirection direction)
{
if (!File.Exists(fileName))
{
return;
}
string line;
StreamReader hFile = File.OpenText(fileName);
// file creation date as a first guess, will be overwritten.
if (direction == ScanDirection.Forward)
{
CreationDate = File.GetCreationTime(fileName);
}
while ((line = hFile.ReadLine()) != null)
{
ParseDataLine(line, direction);
}
if (hFile != null)
{
hFile.Close();
}
}
// this is used for Heydemann correction measures
// the whole field (= all profiles) must be provided at once
internal void InsertColumnFor(int columnIndex, double[] field, ScanDirection scanDirection)
{
if (columnIndex >= NumberOfColumns)
{
return;
}
if (columnIndex < 0)
{
return;
}
if (field.Length != NumberTotalPoints)
{
return;
}
if (scanDirection == ScanDirection.Forward)
{
if (fwdMatrix == null)
{
return;
}
for (int i = 0; i < field.Length; i++)
{
fwdMatrix[columnIndex, i] = field[i];
}
}
if (scanDirection == ScanDirection.Backward)
{
if (bwdMatrix == null)
{
return;
}
for (int i = 0; i < field.Length; i++)
{
bwdMatrix[columnIndex, i] = field[i];
}
}
}
public Task ScanStoreAsync(
long sequenceStart,
ScanDirection direction,
Func <long, object, ScanCallbackResult> consume,
int limit = Int32.MaxValue,
CancellationToken cancellationToken = default(CancellationToken)
)
{
lock (_lock)
{
IEnumerable <Chunk> list;
if (direction == ScanDirection.Forward)
{
list = _chunks.Where(x => x.Id >= sequenceStart)
.Take(limit);
}
else
{
list = _chunks.ToArray()
.Reverse()
.Where(x => x.Id <= sequenceStart)
.Take(limit);
}
foreach (var chunk in list)
{
cancellationToken.ThrowIfCancellationRequested();
// Console.WriteLine($"ScanStore {chunk.Id}");
if (consume(chunk.Index, chunk.Payload) == ScanCallbackResult.Stop)
{
break;
}
}
}
return(Task.FromResult(0));
}
/// <summary>
/// Initialize BarcodeReader settings.
/// </summary>
private void InitReaderSetings()
{
// AutomaticRecognition mode
_reader.Settings.AutomaticRecognition = true;
// set ScanInterval
_reader.Settings.ScanInterval = (int)trackBarScanInterval.Value;
// set ExpectedBarcodes count
_reader.Settings.ExpectedBarcodes = (int)trackBarExpectedBarcodes.Value;
// set ScanDicrecion
ScanDirection scanDirection = ScanDirection.None;
if (directionLR.IsChecked.Value)
{
scanDirection |= ScanDirection.LeftToRight;
}
if (directionRL.IsChecked.Value)
{
scanDirection |= ScanDirection.RightToLeft;
}
if (directionTB.IsChecked.Value)
{
scanDirection |= ScanDirection.TopToBottom;
}
if (directionBT.IsChecked.Value)
{
scanDirection |= ScanDirection.BottomToTop;
}
if (directionAngle45.IsChecked.Value)
{
scanDirection |= ScanDirection.Angle45and135;
}
_reader.Settings.ScanDirection = scanDirection;
}
public List<string> ScanBitmap(WriteableBitmap bmp, int numscans, ScanDirection direction, BarcodeType types)
{
List<string> result = new List<string>();
Parser parser = new Parser();
int height = direction == ScanDirection.Horizontal ? bmp.PixelWidth : bmp.PixelHeight;
if (numscans > height)
numscans = height; // fix for doing full scan on small images
for (int i = 0; i < numscans; i++)
{
int y1 = (i * height) / numscans;
int y2 = ((i + 1) * height) / numscans;
string codesRead = parser.ReadBarcodes(bmp, y1, y2, direction, types);
if (!string.IsNullOrEmpty(codesRead))
{
result.AddRange(codesRead.Split('|'));
}
}
return result;
}
/// <summary>
/// Scans the active frame in the passed bitmap for barcodes.
/// </summary>
/// <param name="CodesRead">Will contain detected barcode strings when the function returns</param>
/// <param name="bmp">Input bitmap</param>
/// <param name="numscans">Number of passes that must be made over the page.
/// 50 - 100 usually gives a good result.</param>
/// <param name="direction">Scan direction</param>
/// <param name="types">Barcode types. Pass BarcodeType.All, or you can specify a list of types,
/// e.g., BarcodeType.Code39 | BarcodeType.EAN</param>
public static void ScanPage(ref System.Collections.ArrayList CodesRead, Bitmap bmp, int numscans, ScanDirection direction, BarcodeType types)
{
int iHeight, iWidth;
if (direction == ScanDirection.Horizontal)
{
iHeight = bmp.Width;
iWidth = bmp.Height;
}
else
{
iHeight = bmp.Height;
iWidth = bmp.Width;
}
if (numscans > iHeight) numscans = iHeight; // fix for doing full scan on small images
for (int i = 0; i < numscans; i++)
{
int y1 = (i * iHeight) / numscans;
int y2 = ((i + 1) * iHeight) / numscans;
string sCodesRead = ReadBarcodes(bmp, y1, y2, direction, types);
if ((sCodesRead != null) && (sCodesRead.Length > 0))
{
string[] asCodes = sCodesRead.Split('|');
foreach (string sCode in asCodes)
{
if (!CodesRead.Contains(sCode))
CodesRead.Add(sCode);
}
}
}
}
/// <summary>
/// Scans one band in the passed bitmap for barcodes.
/// </summary>
/// <param name="bmp">Input bitmap</param>
/// <param name="start">Start coordinate</param>
/// <param name="end">End coordinate</param>
/// <param name="direction">
/// ScanDirection.Vertical: a horizontal band across the page will be examined
/// and start,end should be valid y-coordinates.
/// ScanDirection.Horizontal: a vertical band across the page will be examined
/// and start,end should be valid x-coordinates.
/// </param>
/// <param name="types">Barcode types to be found</param>
/// <returns>Pipe-separated list of barcodes, empty string if none were detected</returns>
public static string ReadBarcodes(Bitmap bmp, int start, int end, ScanDirection direction, BarcodeType types)
{
string sBarCodes = "|"; // will hold return values
// To find a horizontal barcode, find the vertical histogram to find individual barcodes,
// then get the vertical histogram to decode each
histogramResult vertHist = verticalHistogram(bmp, start, end, direction);
// Get the light/dark bar patterns.
// GetBarPatterns returns the bar pattern in 2 formats:
//
// sbCode39Pattern: for Code39 (only distinguishes narrow bars "n" and wide bars "w")
// sbEANPattern: for EAN (distinguishes bar widths 1, 2, 3, 4 and L/G-code)
//
StringBuilder sbCode39Pattern;
StringBuilder sbEANPattern;
GetBarPatterns(ref vertHist, out sbCode39Pattern, out sbEANPattern);
// We now have a barcode in terms of narrow & wide bars... Parse it!
if ((sbCode39Pattern.Length > 0) || (sbEANPattern.Length > 0))
{
for (int iPass = 0; iPass < 2; iPass++)
{
if ((types & BarcodeType.Code39) != BarcodeType.None) // if caller wanted Code39
{
string sCode39 = ParseCode39(sbCode39Pattern);
if (sCode39.Length > 0)
sBarCodes += sCode39 + "|";
}
if ((types & BarcodeType.EAN) != BarcodeType.None) // if caller wanted EAN
{
string sEAN = ParseEAN(sbEANPattern);
if (sEAN.Length > 0)
sBarCodes += sEAN + "|";
}
if ((types & BarcodeType.Code128) != BarcodeType.None) // if caller wanted Code128
{
// Note: Code128 uses same bar width measurement data as EAN
string sCode128 = ParseCode128(sbEANPattern);
if (sCode128.Length > 0)
sBarCodes += sCode128 + "|";
}
// Reverse the bar pattern arrays to read again in the mirror direction
if (iPass == 0)
{
sbCode39Pattern = ReversePattern(sbCode39Pattern);
sbEANPattern = ReversePattern(sbEANPattern);
}
}
}
// Return pipe-separated list of found barcodes, if any
if (sBarCodes.Length > 2)
return sBarCodes.Substring(1, sBarCodes.Length - 2);
return string.Empty;
}
/// <summary>
/// Vertical histogram of an image
/// </summary>
/// <param name="bmp">Bitmap</param>
/// <param name="start">Start coordinate of band to be scanned</param>
/// <param name="end">End coordinate of band to be scanned</param>
/// <param name="direction">
/// ScanDirection.Vertical: start and end denote y-coordinates.
/// ScanDirection.Horizontal: start and end denote x-coordinates.
/// </param>
/// <returns>histogramResult, containing average brightness values across the scan line</returns>
private static histogramResult verticalHistogram(Bitmap bmp, int start, int end, ScanDirection direction)
{
// convert the pixel format of the bitmap to something that we can handle
PixelFormat pf = CheckSupportedPixelFormat(bmp.PixelFormat);
BitmapData bmData;
int xMax, yMax;
if (direction == ScanDirection.Horizontal)
{
bmData = bmp.LockBits(new Rectangle(start, 0, end - start, bmp.Height), ImageLockMode.ReadOnly, pf);
xMax = bmData.Height;
yMax = end - start;
}
else
{
bmData = bmp.LockBits(new Rectangle(0, start, bmp.Width, end - start), ImageLockMode.ReadOnly, pf);
xMax = bmp.Width;
yMax = bmData.Height;
}
// Create the return value
byte[] histResult = new byte[xMax + 2]; // add 2 to simulate light-colored background pixels at sart and end of scanline
ushort[] vertSum = new ushort[xMax];
unsafe
{
byte* p = (byte*)(void*)bmData.Scan0;
int stride = bmData.Stride; // stride is offset between horizontal lines in p
for (int y = 0; y < yMax; ++y)
{
// Add up all the pixel values vertically
for (int x = 0; x < xMax; ++x)
{
if (direction == ScanDirection.Horizontal)
vertSum[x] += getpixelbrightness(p, pf, stride, y, x);
else
vertSum[x] += getpixelbrightness(p, pf, stride, x, y);
}
}
}
bmp.UnlockBits(bmData);
// Now get the average of the row by dividing the pixel by num pixels
int iDivider = end - start;
if (pf != PixelFormat.Format1bppIndexed)
iDivider *= 3;
byte maxValue = byte.MinValue; // Start the max value at zero
byte minValue = byte.MaxValue; // Start the min value at the absolute maximum
for (int i = 1; i <= xMax; i++) // note: intentionally skips first pixel in histResult
{
histResult[i] = (byte)(vertSum[i - 1] / iDivider);
//Save the max value for later
if (histResult[i] > maxValue) maxValue = histResult[i];
// Save the min value for later
if (histResult[i] < minValue) minValue = histResult[i];
}
// Set first and last pixel to "white", i.e., maximum intensity
histResult[0] = maxValue;
histResult[xMax + 1] = maxValue;
histogramResult retVal = new histogramResult();
retVal.histogram = histResult;
retVal.max = maxValue;
retVal.min = minValue;
// Now we have the brightness distribution along the scan band, try to find the distribution of bar widths.
retVal.threshold = (byte)(minValue + ((maxValue - minValue) >> 1));
GetBarWidthDistribution(ref retVal, 0, retVal.histogram.Length);
// Now that we know the narrow bar width, lets look for barcode zones.
// The image could have more than one barcode in the same band, with
// different bar widths.
FindBarcodeZones(ref retVal);
return retVal;
}
private void btnRunForward_Click(object sender, EventArgs e)
{
step = 0;
appState = ApplicationState.SingleRun;
rightStep = true;
if (lastScanDirection == ScanDirection.Left)
{
dataPlot.AddNewLockinDataSeries();
}
lastScanDirection = ScanDirection.Right;
if (chkStabilityTest.Checked)
{
lockinAmp.SetBufferReadState(LockinAmplifier.BufferedReadCommands.Reset);
lockinAmp.SetBufferReadState(LockinAmplifier.BufferedReadCommands.Start);
}
stageControl.MoveOneStep(rightStep);
stagePollTimer.Enabled = true;
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public CommandStatus Scan(ScanDirection dir, uint lba, ScanType type)
{
if (m_logger != null)
{
string args = dir.ToString() + ", " + lba.ToString() + ", " + type.ToString();
m_logger.LogMessage(new UserMessage(UserMessage.Category.Debug, 8, "Bwg.Scsi.Device.Scan(" + args + ")"));
}
if (type == ScanType.Reserved)
throw new Exception("type parameter is of type Reserved");
using (Command cmd = new Command(ScsiCommandCode.Scan, 12, 0, Command.CmdDirection.None, 10))
{
if (dir == ScanDirection.Reverse)
cmd.SetCDB8(1, 0x10);
cmd.SetCDB32(2, lba);
cmd.SetCDB8(9, (byte)((byte)type << 6));
CommandStatus st = SendCommand(cmd);
if (st != CommandStatus.Success)
return st;
}
return CommandStatus.Success;
}
private static int GetNextIndex(ScanDirection direction, int chunkSize, ref Vector3Int workCoords)
{
var x = workCoords.X;
var y = workCoords.Y;
var z = workCoords.Z;
switch (direction)
{
case ScanDirection.Xyz:
workCoords.X = (x + 1)%chunkSize;
if (workCoords.X < x)
{
workCoords.Y = (y + 1)%chunkSize;
if (workCoords.Y < y)
{
workCoords.Z = (z + 1)%chunkSize;
}
}
break;
case ScanDirection.Xzy:
workCoords.X = (x + 1)%chunkSize;
if (workCoords.X < x)
{
workCoords.Z = (z + 1)%chunkSize;
if (workCoords.Z < z)
{
workCoords.Y = (y + 1)%chunkSize;
}
}
break;
case ScanDirection.Yxz:
workCoords.Y = (y + 1)%chunkSize;
if (workCoords.Y < y)
{
workCoords.X = (x + 1)%chunkSize;
if (workCoords.X < x)
{
workCoords.Z = (z + 1)%chunkSize;
}
}
break;
case ScanDirection.Yzx:
workCoords.Y = (y + 1)%chunkSize;
if (workCoords.Y < y)
{
workCoords.Z = (z + 1) % chunkSize;
if (workCoords.Z < z)
{
workCoords.X = (x + 1) % chunkSize;
}
}
break;
case ScanDirection.Zxy:
workCoords.Z = (z + 1) % chunkSize;
if (workCoords.Z < z)
{
workCoords.X = (x + 1) % chunkSize;
if (workCoords.X < x)
{
workCoords.Y = (y + 1) % chunkSize;
}
}
break;
case ScanDirection.Zyx:
workCoords.Z = (z + 1) % chunkSize;
if (workCoords.Z < z)
{
workCoords.Y = (y + 1) % chunkSize;
if (workCoords.Y < y)
{
workCoords.X = (x + 1) % chunkSize;
}
}
break;
default:
throw new ArgumentOutOfRangeException("direction");
}
return workCoords.X*chunkSize*chunkSize + workCoords.Z*chunkSize + workCoords.Y;
}
private SortedList<Interval, Block> ConvertArrayToIntervalTreeLinear(Block[] blocks, ScanDirection optimalDirection, out float compressionRatio)
{
var count = m_chunkSize * m_chunkSize * m_chunkSize;
var nodesRemoved = count;
var intervals = new SortedList<Interval, Block>();
var min = 0;
var max = 0;
var current = Block.Empty;
var started = false;
var workCoords = new Vector3Int();
for (var i = 0; i < count; ++i)
{
var block = blocks[GetNextIndex(optimalDirection, m_chunkSize, ref workCoords)];
if (!(started && block == current))
{
if (started)
{
intervals.Add(new Interval((ushort)min, (ushort)max), current);
}
current = block;
min = i;
started = true;
--nodesRemoved;
}
max = i;
}
intervals.Add(new Interval((ushort)min, (ushort)max), current);
compressionRatio = nodesRemoved / (float)count;
return intervals;
}
private void EvaluateLinearTree(Block[] blocks, out float compressionRatio, out ScanDirection optimalDirection)
{
var count = m_chunkSize * m_chunkSize * m_chunkSize;
compressionRatio = 0;
optimalDirection = ScanDirection.Xyz;
foreach (ScanDirection scanDirection in Enum.GetValues(typeof(ScanDirection)))
{
var nodesRemoved = count;
Block current = Block.Empty;
Vector3Int workCoords = new Vector3Int();
for (var i = 0; i < count; ++i)
{
var block = blocks[GetNextIndex(scanDirection, m_chunkSize, ref workCoords)];
if (block == current)
{
continue;
}
current = block;
--nodesRemoved;
}
var currentRatio = nodesRemoved / (float)count;
if (currentRatio <= compressionRatio)
{
continue;
}
compressionRatio = currentRatio;
optimalDirection = scanDirection;
//this means we are mostly air and can just exit out now!
if (currentRatio > 0.97f)
{
break;
}
}
}
