How can I set the hint 'AutoRotate' for 'GenericMultipleBarcodeReader' in Zxing.net. I have set Try_Harder = true. But no results for detecting multiple 1d/2d barcodes from a rotated image. If the image is aligned properly it gives the results.
Edit: In 'GenericMultipleBarcodeReader' I am using 'ByQuadrantReader'. This could detect barcodes and QR codes from properly aligned images. For a rotated image it could not find anything.
MultiFormatReader multiReader = new MultiFormatReader();
ZXing.Multi.GenericMultipleBarcodeReader byquadReader = new ZXing.Multi.GenericMultipleBarcodeReader(new ByQuadrantReader(multiReader));
Dictionary<DecodeHintType, object> hints = new Dictionary<DecodeHintType, object>();
hints.Add(DecodeHintType.TRY_HARDER, true);
List<BarcodeFormat> formats = new List<BarcodeFormat>();
formats.Add(BarcodeFormat.All_1D);
formats.Add(BarcodeFormat.QR_CODE);
hints.Add(DecodeHintType.POSSIBLE_FORMATS, formats);
****
byquadresults = byquadReader.decodeMultiple(binaryBitmap, hints);
Could any one please help me.
AutoRotate can only be used with the BarcodeReader class.
var bitmap = (Bitmap)Bitmap.FromFile("<path to your image file>");
var reader = new BarcodeReader
{
AutoRotate = true,
Options = new DecodingOptions
{
TryHarder = true,
PossibleFormats = new List<BarcodeFormat>
{
BarcodeFormat.All_1D,
BarcodeFormat.QR_CODE
}
}
};
var results = reader.DecodeMultiple(bitmap);
If you want to use the ByQuadrantReader you have to replace the line
var reader = new BarcodeReader...
with
var reader = new BarcodeReader(new ByQuadrantReader(new MultiFormatReader()), null, null)...
Related
I am trying to make a TextBox locked by using OpenXML SDK. I've tried this method but the TextBox NoTextEdit is not working.
public DocumentFormat.OpenXml.Presentation.Shape GenerateShape(string StrText)
{
DocumentFormat.OpenXml.Presentation.Shape shape1 = new DocumentFormat.OpenXml.Presentation.Shape();
DocumentFormat.OpenXml.Presentation.NonVisualShapeProperties nonVisualShapeProperties1 = new DocumentFormat.OpenXml.Presentation.NonVisualShapeProperties();
DocumentFormat.OpenXml.Presentation.NonVisualDrawingProperties nonVisualDrawingProperties1 = new DocumentFormat.OpenXml.Presentation.NonVisualDrawingProperties() { Id = (UInt32Value)3U, Name = "ID",Hidden=true ,Description="Do not Remove" ,MCAttributes=null };
DocumentFormat.OpenXml.Presentation.NonVisualShapeDrawingProperties nonVisualShapeDrawingProperties1 = new DocumentFormat.OpenXml.Presentation.NonVisualShapeDrawingProperties();
Drawing.ShapeLocks shapeLocks1 = new Drawing.ShapeLocks() { NoTextEdit = true, NoGrouping = true,NoMove=true,NoSelection=true,NoEditPoints=true ,NoAdjustHandles=true ,NoRotation=true,NoChangeArrowheads=true,NoChangeAspect=true,NoChangeShapeType=true,NoResize=true};
nonVisualShapeDrawingProperties1.Append(shapeLocks1);
ApplicationNonVisualDrawingProperties applicationNonVisualDrawingProperties1 = new ApplicationNonVisualDrawingProperties();
PlaceholderShape placeholderShape1 = new PlaceholderShape() { Type = PlaceholderValues.SubTitle, Index = (UInt32Value)1U };
applicationNonVisualDrawingProperties1.Append(placeholderShape1);
nonVisualShapeProperties1.Append(nonVisualDrawingProperties1);
nonVisualShapeProperties1.Append(nonVisualShapeDrawingProperties1);
nonVisualShapeProperties1.Append(applicationNonVisualDrawingProperties1);
DocumentFormat.OpenXml.Presentation.ShapeProperties shapeProperties1 = new DocumentFormat.OpenXml.Presentation.ShapeProperties();
DocumentFormat.OpenXml.Presentation.TextBody textBody1 = new DocumentFormat.OpenXml.Presentation.TextBody();
Drawing.BodyProperties bodyProperties1 = new Drawing.BodyProperties();
Drawing.ListStyle listStyle1 = new Drawing.ListStyle();
Drawing.TextShape shp = new Drawing.TextShape();
Drawing.Paragraph paragraph1 = new Drawing.Paragraph();
Drawing.EndParagraphRunProperties endParagraphRunProperties1 = new Drawing.EndParagraphRunProperties() { Language = "en-US" ,Dirty=false };
paragraph1.Append(GenerateRun(StrText));
paragraph1.Append(endParagraphRunProperties1);
textBody1.Append(bodyProperties1);
textBody1.Append(listStyle1);
textBody1.Append(paragraph1);
shape1.Append(nonVisualShapeProperties1);
shape1.Append(shapeProperties1);
shape1.Append(textBody1);
return shape1;
}
public Drawing.Run GenerateRun(string StrText)
{
Drawing.Run run1 = new Drawing.Run();
Drawing.RunProperties runProperties1 = new Drawing.RunProperties() { Language = "en-US", Dirty = false };
runProperties1.SetAttribute(new OpenXmlAttribute("", "smtClean", "", "0"));
Drawing.Text text1 = new Drawing.Text();
text1.Text = StrText;
Drawing.SolidFill solidFill2 = new Drawing.SolidFill();
Drawing.SchemeColor schemeColor = new Drawing.SchemeColor();
string y = System.Drawing.Color.Transparent.ToArgb().ToString("X");
Drawing.RgbColorModelHex rgbColorModelHex2 = new Drawing.RgbColorModelHex() { Val = "FFFFFF" };//Set Font-Color to Blue (Hex "0070C0").
solidFill2.Append(rgbColorModelHex2);
runProperties1.Append(solidFill2);
Color color = new Color() { Val = "365F91", ThemeColor = ThemeColorValues.Accent1, ThemeShade = "BF" };
run1.Append(runProperties1);
run1.Append(text1);
return run1;
}
Everything works fine except editing. Still the user can edit the TextBox values by double clicking it. How can I avoid this ?
Is there any permanent solution to prevent editing ? Please help me to find a better solution.
Thanks in advance
By researching and communications with the MVP team I've pointed out that there is no way to Protect the TextBox from editing.
As Cindy Meister mentioned in the comments,
Are you able to do it in the PowerPoint application user interface? If not, then Open XML cannot do it... If yes, you can.
If you do not want to text to be changed , Just change it as image then lock that by using NoSelection=true/1 and NoMove=true/1 properties. If you enable these properties the user can't either delete nor change it's position.
For your ref: https://answers.microsoft.com/en-us/msoffice/forum/msoffice_powerpoint-mso_windows8-mso_2016/shape-lock-is-not-working/c1705b55-d2aa-4adb-b538-574ed2fc8eca?tm=1579265435636&page=1&rtAction=1579495439869
I'm trying to reading QR CODES in the images acquired by an usb camera.
In other posts I have read that the best open source library is ZXing.
If the qrcode comes from a digitally generated image the library works fine, but if the qrcode comes from a real case where the image is acquired by a camera the deconding library has some difficulties.
The acquired images are disturbed by some glare, or code deformation, or slow contrast.
Do you know some parameters to setup better the reader?
Or some filter to add to the image before elaboration?
For example:
BarcodeReader reader = new BarcodeReader();
reader.AutoRotate = true;
reader.Options.TryHarder = true;
reader.Options.PureBarcode = false;
reader.Options.PossibleFormats = new List<BarcodeFormat>();
reader.Options.PossibleFormats.Add(BarcodeFormat.QR_CODE);
var result = reader.Decode(image);
Thank you
After several test the best result for 300dpi scanned image comes with :
//use gaussian filter to remove noise
var gFilter = new GaussianBlur(2);
image = gFilter.ProcessImage(image);
var options = new DecodingOptions { PossibleFormats = new List<BarcodeFormat> { BarcodeFormat.QR_CODE }, TryHarder = true };
using (image)
{
//use GlobalHistogramBinarizer for best result
var reader = new BarcodeReader(null, null, ls => new GlobalHistogramBinarizer(ls)) { AutoRotate = false, TryInverted = false, Options = options };
var result = reader.Decode(image);
reader = null;
return result;
}
For gaussian filter I use this code from http://www.cnblogs.com/Dah/archive/2007/03/30/694527.html
Hope this help someone.
I was wondering if there was a way to crop videos in Xamarin. I can't seem to find any examples. I tried looking at the existing functions and Classes but I couldn't find anything.
Basically make square videos like what Vine and Instagram have. I think this is done by cropping out the rest of the video and not just zooming in.
I find part of the code from one source, I tried to add owner but I could not find. The solution's key part is added by me for cropping which is "VideoCleanAperture" inside AVVideoSettingsCompressed.
videoUrl = ((AVFoundation.AVUrlAsset)avAsset).Url;
NSError assetReaderError;
var assetReader = AVAssetReader.FromAsset(avAsset, out assetReaderError);
var assetTrack = avAsset.Tracks.First();
//Height = (System.nint?)avAsset.NaturalSize.Height,
//Width = (System.nint?)avAsset.NaturalSize.Width,
var inputSettings = new AVVideoSettingsUncompressed()
{
Height = (System.nint?)avAsset.NaturalSize.Height,
Width = (System.nint?)avAsset.NaturalSize.Width,
};
var assetReaderOutput = new AVAssetReaderTrackOutput(assetTrack, settings: inputSettings);
assetReaderOutput.AlwaysCopiesSampleData = false;
string tempFile = Path.Combine(Path.GetTempPath(), "CroppedVideo.mp4");
if (File.Exists(tempFile)) File.Delete(tempFile);
var url = NSUrl.FromFilename(tempFile);
NSError assetWriterError;
var assetWriter = new AVAssetWriter(url, AVFileType.Mpeg4, out assetWriterError);
var outputSettings = new AVVideoSettingsCompressed()
{
Height = 300,
Width = 300,
Codec = AVVideoCodec.H264,
CodecSettings = new AVVideoCodecSettings()
{
AverageBitRate = 1000000,
VideoCleanAperture = new AVVideoCleanApertureSettings(
new NSDictionary(
AVVideo.CleanApertureWidthKey, new NSNumber(300),
AVVideo.CleanApertureHeightKey, new NSNumber(300),
AVVideo.CleanApertureVerticalOffsetKey, new NSNumber(10),
AVVideo.CleanApertureHorizontalOffsetKey, new NSNumber(10)
)
)
},
ScalingMode = AVVideoScalingMode.ResizeAspectFill
};
var assetWriterInput = new AVAssetWriterInput(mediaType: AVMediaType.Video, outputSettings: outputSettings);
assetWriterInput.ExpectsMediaDataInRealTime = false;
assetWriter.AddInput(assetWriterInput);
assetWriter.StartWriting();
assetReader.AddOutput(assetReaderOutput);
assetReader.StartReading();
assetWriter.StartSessionAtSourceTime(CoreMedia.CMTime.Zero);
var mediaInputQueue = new DispatchQueue("mediaInputQueue");
assetWriterInput.RequestMediaData(mediaInputQueue, () =>
{
while (assetWriterInput.ReadyForMoreMediaData)
{
var nextBuffer = assetReaderOutput.CopyNextSampleBuffer();
if (nextBuffer != null)
{
assetWriterInput.AppendSampleBuffer(nextBuffer);
}
else
{
assetWriterInput.MarkAsFinished();
assetWriter.FinishWritingAsync();
assetReader.CancelReading();
assetReader.Dispose();
assetReaderOutput.Dispose();
assetWriter.Dispose();
assetWriterInput.Dispose();
break;
}
}
});
}
I have a resource item (a png file) in my resource dictionary which I'm using in several places. Now I want to use it as application's NotifyIcon. But I don't know how to do this. Have you any idea please?
// my image:
var bitmap = new BitmapImage();
bitmap.UriSource = new Uri("pack://application:,,,/MyProj.Resources;component/Icons/Logo_48x48.png");
// and I try to do this:
var iconHandle = bitmap.GetHicon(); // but this line doesn't work
var ni = new NotifyIcon {
Icon = System.Drawing.Icon.FromHandle(iconHandle),
Visible = true
};
var sri = Application.GetResourceStream(
new Uri("pack://application:,,,/MyProj.Resources;component/Icons/Logo_48x48.png"));
var bitmap = new Bitmap(sri.Stream);
var handle = bitmap.GetHicon();
var ni = new NotifyIcon {
Icon = System.Drawing.Icon.FromHandle(handle),
Visible = true
};
I might be missing something here, but this code:
this.oSectionDRs = new Section()
{
new ActivityElement()
{
Caption = Locale.GetLocale("Settings_Loading"),
Animating = true
}
};
// To begin with just show a loading indicator.
this.Root = new RootElement (Locale.GetLocale("Settings_Select"))
{
this.oSectionDRs
};
Does not show any animated thingy. It is showing the label only. How can I get the animated star?
Using this code:
var root = new RootElement("foo");
root.Add (new Section("foo", "bar") {
new ActivityElement()
{
Caption = "foo",
Animating = true
}
});
var dvc = new DialogViewController(root, false);
window.RootViewController = dvc;
I get both the caption and the activity scroller thing. Not sure it helps you tho! I was just using the built in MT.D.