I want you to know the methods to get the image from array of bytes :
I'am using this code but it's throw an exception ,if the size is more than 100 or the length of the arary,and if it's less than 50 it save a messay image
Bitmap b = new Bitmap(#"C:/difflena.jpg");
byte[] pixels = lolo(b);
MemoryStream stream = new MemoryStream(pixels, 0, pixels.Length);
Bitmap bitmap = new Bitmap(stream);
Image<Gray, byte> image = new Image<Gray, byte>(60, 60);
image.Bytes = pixels;
image.Save(file + "face" + "t" + ".bmp");
if (image != null) { Label1.Text = "yes";
public byte[] lolo(Bitmap n)
{
/*ImageFormat imageFormat = n.RawFormat;
byte[] Ret=null;
try
{
using (MemoryStream ms = new MemoryStream())
{
n.Save(ms, imageFormat);
Ret = ms.ToArray();
}
}
catch (Exception) { Label1.Text = "no"; }
return Ret;}
Related
I need one help.
I am using Appium and I have a scenerio wherein I need to capture an image from the app under test, preserve that image as a baseline image and then capture another image from that app under test and then perform an image comparison between these two images.
Can anyone guide me how to do this please.
This is how you do it:
#Test(dataProvider = "search")
public void eventsSearch(String data) throws InterruptedException, IOException {
Thread.sleep(2000);
boolean status = false;
//WebElement img = driver.findElementByClassName("android.widget.ImageView");
//take screen shot
File screen = ((TakesScreenshot) driver)
.getScreenshotAs(OutputType.FILE);
// for (String event : events) {
driver.findElementById("your id")
.sendKeys(data);
driver.hideKeyboard();
List<WebElement> list = driver
.findElementsByXPath("//*[#class='android.widget.TextView' and #index='1']");
System.out.println(list.size());
int i = 0;
for (WebElement el : list) {
String eventList = el.getText();
System.out.println("events" + " " + eventList);
if (eventList.equals("gg")) {
status = true;
break;
}
i++;
}
//capture image of searched contact icon
List<WebElement > imageList = driver.findElementsByXPath("//*[#class='android.widget.ImageView' and #index='0']");
System.out.println(imageList.size());
System.out.println(i);
WebElement image = imageList.get(1);
Point point = image.getLocation();
//get element dimension
int width = image.getSize().getWidth();
int height = image.getSize().getHeight();
BufferedImage img = ImageIO.read(screen);
BufferedImage dest = img.getSubimage(point.getX(), point.getY(), width,
height);
ImageIO.write(dest, "png", screen);
File file = new File("Menu.png");
FileUtils.copyFile(screen, file);
//verify images
verifyImage("Menu.png", "Menu.png" );
//Assert.assertTrue(status, "FAIL Event doesn't match" + data);
}
#DataProvider(name = "search")
public Object[][] searchData() {
return new Object[][] { { "gg" } };
}
public void verifyImage(String image1, String image2) throws IOException{
File fileInput = new File(image1);
File fileOutPut = new File(image2);
BufferedImage bufileInput = ImageIO.read(fileInput);
DataBuffer dafileInput = bufileInput.getData().getDataBuffer();
int sizefileInput = dafileInput.getSize();
BufferedImage bufileOutPut = ImageIO.read(fileOutPut);
DataBuffer dafileOutPut = bufileOutPut.getData().getDataBuffer();
int sizefileOutPut = dafileOutPut.getSize();
Boolean matchFlag = true;
if(sizefileInput == sizefileOutPut) {
for(int j=0; j<sizefileInput; j++) {
if(dafileInput.getElem(j) != dafileOutPut.getElem(j)) {
matchFlag = false;
break;
}
}
}
else
matchFlag = false;
Assert.assertTrue(matchFlag, "Images are not same");
}
Document is printed from MVC controller to Debian Squeeze Linux server printer using code below in Mono.
Page in printer is A4.
Printed text in paper is too big and unsharp. Rightmost part of text is not visible since it does not fit to page.
If printed from Windows from .NET to HP Laserjet, output is correct.
So it looks like Mono or Samsung ML-331x Series printer zooms bitmap for unknown reason which causes too big and unsharp output.
How to fix this so that bitmap is printed like in windows ?
Possible solutions:
Best way would be to print formatted html directly. How to do it in server where there are no browser installed? wkhtmltopdf does not support printing. I posted it in How to print formatted html in Linux server
Maybe it is possible to use wkhtmltopdf convert html to pdf instead of bitmap I posted it as separate question in How to print pdf in debian linux from MVC controller
wkhtmltoimage can produce also other image formats. Maybe some other format is better ?
Maybe some wkhtmltoimage command line swithches like --width=750 or --dpi can fix this ?
public class Test: Controller
{
public ActionResult Print()
{
PrintOrderVormiga();
return new ContentResult() { Content = "OK" };
}
void PrintOrderVormiga()
{
StringBuilder sb = new StringBuilder();
sb.Insert(0, " test ", 500);
var bmp = ConvertHtmlToBMP("<html><body>" +sb.Tostring()+ "</body></html>");
var doc = new PrintDocument();
doc.PrinterSettings.PrinterName = "Samsung ML-331x Series";
doc.PrintPage += new PrintPageEventHandler(ProvideContent);
pageHeight = doc.DefaultPageSettings.PaperSize.Height;
using (bm = new Bitmap(new MemoryStream(bmp)))
{
lehti = (int)Math.Ceiling(bm.Height / (double)pageHeight);
doc.PrinterSettings.FromPage = 1;
doc.PrinterSettings.ToPage = lehti;
pageno = 0;
doc.Print();
}
}
int pageno, lehti;
int pageHeight;
Bitmap bm;
void ProvideContent(object sender, PrintPageEventArgs e)
{
Rectangle cropRect = new Rectangle(0, pageHeight * pageno++,
bm.Width, pageHeight);
Bitmap target = new Bitmap(cropRect.Width, cropRect.Height);
e.Graphics.DrawImage(bm, new Rectangle(0, 0, target.Width, target.Height),
cropRect,
GraphicsUnit.Pixel);
e.HasMorePages = pageno < lehti;
}
static byte[] ConvertHtmlToBMP(string html)
{
string programm = "wkhtmltoimage";
if (Environment.OSVersion.Platform != PlatformID.Win32NT)
{
programm = "wkhtmltoimage-amd64";
}
var p = new Process
{
StartInfo =
{
CreateNoWindow = true,
RedirectStandardOutput = true,
RedirectStandardError = true,
RedirectStandardInput = true,
UseShellExecute = false,
FileName = Environment.OSVersion.Platform == PlatformID.Win32NT ?
"C:\\Program Files\\wkhtmltopdf\\bin\\" + programm + ".exe" : "/usr/bin/" + programm
}
};
p.StartInfo.Arguments = "--format bmp --disable-javascript --quality 10";
p.StartInfo.Arguments += " - -";
p.Start();
using (var stream = p.StandardInput)
{
byte[] ibuffer = System.Text.Encoding.UTF8.GetBytes(html);
stream.BaseStream.Write(ibuffer, 0, ibuffer.Length);
stream.WriteLine();
}
var buffer = new byte[32768];
byte[] file;
using (var ms = new MemoryStream())
{
while (true)
{
var read = p.StandardOutput.BaseStream.Read(buffer, 0, buffer.Length);
if (read <= 0)
{
break;
}
ms.Write(buffer, 0, read);
}
file = ms.ToArray();
}
p.WaitForExit(60000);
var returnCode = p.ExitCode;
p.Close();
return file;
}
}
You can use this HTML to PDF Converter for Mono solution from EvoPdf. The C# code for converting a HTML to PDF in Mono is:
// create the HTML to PDF converter object
HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter(serverIPAddress, serverPortNumber);
// set service password if necessary
if (serverPassword.Length > 0)
htmlToPdfConverter.ServicePassword = serverPassword;
// set PDF page size
htmlToPdfConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4;
// set PDF page orientation
htmlToPdfConverter.PdfDocumentOptions.PdfPageOrientation = PdfPageOrientation.Portrait;
// convert the HTML page from given URL to PDF in a buffer
byte[] pdfBytes = htmlToPdfConverter.ConvertUrl(urlToConvert);
Unable to retrive the blob image from mysql database using below code in mvc4 with entityframework6
byte[] photo = entity.collections.Where(p => p.CustomerID == CustomerID).Select(img => img.Money_Receipt_Photo).FirstOrDefault();
MemoryStream ms = new MemoryStream(photo);
ms.Write(photo, 0, photo.Length);
System.Drawing.ImageConverter converter = new System.Drawing.ImageConverter();
System.Drawing.Image returnImage = (Image)converter.ConvertFrom(ms);
return returnImage;
error: ImageConverter cannot convert from System.IO.MemoryStream.
Assuming that you are receiving the stream of bytes from the blob.
Try this code :
public Image Base64ToImage(string base64String)
{
// Convert Base64 String to byte[]
byte[] imageBytes = Convert.FromBase64String(base64String);
MemoryStream ms = new MemoryStream(imageBytes, 0,
imageBytes.Length);
// Convert byte[] to Image
ms.Write(imageBytes, 0, imageBytes.Length);
Image image = Image.FromStream(ms, true);
return image;
}
I have an MVC 4 application with a button for taking a photo that opens up a new window with javascript which contains a silverlight application in it. The silverlight application can then take a photo using the webcam and store it as a Writeable Bitmap. What I would like to do is then push that bitmap onto an action in my controller for saving to the database and refreshing the view.
I know I need to send the image as a post to my controller, but any code examples or suggestions on how I would go about doing that would be greatly appreciated. I think it should work as follows, Button Click for saving the image in my silverlight application would call a POST to the MVC controller and attach the image stream as a parameter in the controller, and the controller can then take the stream and push it up to the database then I can close the silverlight window. Just not sure how to go about coding that.
You could send the image using a WebClient. Let's suppose that you have the image inside your Silverlight application in a byte array:
byte[] image = ... get the image from your webcam
var client = new WebClient();
var uri = new Uri("http://example.com/photos/upload");
client.OpenWriteCompleted += (sender, e) =>
{
var buffer = (byte[])e.UserState;
e.Result.Write(buffer, 0, buffer.Length);
e.Result.Close();
};
client.OpenWriteAsync(uri, "POST", image);
and on the MVC side:
[HttpPost]
public ActionResult Upload()
{
byte[] image = new byte[Request.InputStream.Length];
Request.InputStream.Read(image, 0, image.Length);
// TODO: do something with the uploaded image here ...
}
Thank you for the reply. This is exactly what I was looking for, however ive run into a problem. Silverlight gives me the webcam snapshot as a WriteableBitmap type. Which I then tried to convert to a byte[] array before sending it over to MVC. It is saving to the database successfully, however it does not appear to be a valid image when I try to pull it back out from the database and display it. Is there an issue that you can see with my conversion code? Or perhaps can I send it over as an image type, or can I only send over byte[] arrays through http posts like this?
In my Silverlight application:
private void SendImage()
{
var client = new WebClient();
var uri = new Uri("http://localhost:4600/GuestBadge/GetCameraImage");
client.OpenWriteCompleted += (sender, e) =>
{
var buffer = (byte[])e.UserState;
e.Result.Write(buffer, 0, buffer.Length);
e.Result.Close();
};
client.OpenWriteAsync(uri, "POST", ToByteArray(SnapShot));
}
public static byte[] ToByteArray(WriteableBitmap bmp)
{
// Init buffer
int w = bmp.PixelWidth;
int h = bmp.PixelHeight;
int[] p = bmp.Pixels;
int len = p.Length;
byte[] result = new byte[4 * w * h];
// Copy pixels to buffer
for (int i = 0, j = 0; i < len; i++, j += 4)
{
int color = p[i];
result[j + 0] = (byte)(color >> 24); // A
result[j + 1] = (byte)(color >> 16); // R
result[j + 2] = (byte)(color >> 8); // G
result[j + 3] = (byte)(color); // B
}
return result;
}
And in my controller:
[HttpPost]
public ActionResult GetCameraImage()
{
byte[] image = new byte[Request.InputStream.Length];
Request.InputStream.Read(image, 0, image.Length);
var getPerson = (from a in db.Persons where a.PersonID == 3 select a).FirstOrDefault();
getPerson.Picture = image;
db.SaveChanges();
return null;
}
I ended up using FJCore http://code.google.com/p/fjcore/ to encode my WriteableBitmap into JPEG and then converted that to BASE64 using code I found at this question Using FJCore to encode Silverlight WriteableBitmap THANKS!. Then in turn converted that out to a byte[] array and sent it to MVC using your code and now its working great. I'm pretty new at all this stuff and didn't quite understand the encoding process enough before. Below is the code I used for this. Thanks again for your help!
private static string GetBase64Jpg(WriteableBitmap bitmap)
{
int width = bitmap.PixelWidth;
int height = bitmap.PixelHeight;
int bands = 3;
byte[][,] raster = new byte[bands][,];
for (int i = 0; i < bands; i++)
{
raster[i] = new byte[width, height];
}
for (int row = 0; row < height; row++)
{
for (int column = 0; column < width; column++)
{
int pixel = bitmap.Pixels[width * row + column];
raster[0][column, row] = (byte)(pixel >> 16);
raster[1][column, row] = (byte)(pixel >> 8);
raster[2][column, row] = (byte)pixel;
}
}
ColorModel model = new ColorModel { colorspace = ColorSpace.RGB };
FluxJpeg.Core.Image img = new FluxJpeg.Core.Image(model, raster);
MemoryStream stream = new MemoryStream();
JpegEncoder encoder = new JpegEncoder(img, 90, stream);
encoder.Encode();
stream.Seek(0, SeekOrigin.Begin);
byte[] binaryData = new Byte[stream.Length];
long bytesRead = stream.Read(binaryData, 0, (int)stream.Length);
string base64String =
System.Convert.ToBase64String(binaryData,
0,
binaryData.Length);
return base64String;
}
private void SendImage()
{
var client = new WebClient();
var uri = new Uri("http://localhost:4600/GuestBadge/GetCameraImage");
client.OpenWriteCompleted += (sender, e) =>
{
var buffer = (byte[])e.UserState;
e.Result.Write(buffer, 0, buffer.Length);
e.Result.Close();
};
client.OpenWriteAsync(uri, "POST", Convert.FromBase64String(GetBase64Jpg(SnapShot)));
}
I want to read the image stored in Oracle Long datatype.
Number of images are stored in a remote Oracle database in a column with datatype long. I just need to retrieve those images and show them on my aspx page.
I could retrieve the image from database but when tried to caste it to byte array, it threw error that, string can not be converted to byte[]'.
Anybody have any suggestions on how to retrieve these images stored in long column in database.
byte[] signatureBlobReceived = cls_TBL_BROKER_BL.GetInstance().GetSignatureBlobFromAccountNumber_BL(strCRNnumber);
return File(signatureBlobReceived, "image/jpeg");
public byte[] GetSignatureBlobFromAccountNumber_BL()
{
object SignatureBlob = null;
Database db = DatabaseFactory.CreateDatabase("imageConnectionString");
DbCommand dbc = db.GetSqlStringCommand(ConfigurationSettings.AppSettings["signqry"].ToString());
dbc.CommandType = CommandType.Text;
SignatureBlob = db.ExecuteScalar(dbc);
byte[] array = Encoding.ASCII.GetBytes(Convert.ToString(SignatureBlob));
string aa = string.Empty;
return array;
}
Query used is:
<add key="signqry" value="SELECT image FROM table1"/> `
Try this (odp.net)
string connStr = "User Id=user;Password=pwd;Data Source=mySID;";
OracleConnection _conn = new OracleConnection(connStr);
_conn.Open();
string sel = #"select long_raw_col from long_raw_test";
OracleCommand cmd = new OracleCommand(sel, _conn);
cmd.InitialLONGFetchSize = 5000;
OracleDataReader reader = cmd.ExecuteReader();
int rows = 0;
// loop through rows from table
while (reader.Read())
{
rows++;
byte[] buf = new byte[5000];
long bytesRead = reader.GetBytes(reader.GetOrdinal("long_raw_col"), 0, buf, 0, 5000);
FileStream fs = new FileStream("C:\\test\\test_long" + rows + ".dat", FileMode.Create);
fs.Write(buf, 0, (int)bytesRead);
fs.Close();
Console.WriteLine("Row " + rows + ": Read " + bytesRead + " bytes from table, see test_long" + rows + ".dat");
}
This example just reads the long raw data from Oracle into a byte array, then outputs to a file. Note the InitalLONGFetchSize > 0.
I use this class :my database is informix and the images are stored in Byte type .Hope this can help you.
public class MyPhoto
{
public static Stream RetrievePhoto()
{
DBConnection DAL_Helper = new DBConnection(ConfigurationSettings.AppSettings["connection"].ToString());
Byte[] myByteBuff;
Stream myImgStream;
string qry = "----------";
DataTable dt = DAL_Helper.Return_DataTable(qry);
try
{
if (dt.Rows.Count > 0)
{
if (!string.IsNullOrEmpty(dt.Rows[0][0].ToString()))
{
myByteBuff = (Byte[])((object)(dt.Rows[0][0]));
myImgStream = new MemoryStream(myByteBuff);
}
else
{
myImgStream = RetrievePhotoNoProfile();
}
}
else
{
myImgStream = RetrievePhotoNoProfile();
}
}
catch (Exception ex)
{
myImgStream = RetrievePhotoNoProfile();
}
return myImgStream;
}
public static byte[] StreamToByteArray(Stream stream)
{
if (stream is MemoryStream)
{
return ((MemoryStream)stream).ToArray();
}
else
{
return ReadFully(stream);
}
}
public static byte[] ReadFully(Stream input)
{
byte[] buffer = new byte[input.Length];
using (MemoryStream ms = new MemoryStream())
{
int read;
while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
return ms.ToArray();
}
}
private static Stream RetrievePhotoNoProfile()
{
string noprofileimgPath = HttpContext.Current.Server.MapPath("~/images/noprofile.png");
System.IO.FileStream fs = new System.IO.FileStream(noprofileimgPath, System.IO.FileMode.Open, FileAccess.Read);
byte[] ba = new byte[fs.Length];
fs.Read(ba, 0, (int)fs.Length);
Stream myImgStream = new MemoryStream(ba);
fs.Close();
return myImgStream;
}
public static Image byteArrayToImage(byte[] byteArrayIn)
{
MemoryStream ms = new MemoryStream(byteArrayIn);
Image returnImage = Image.FromStream(ms);
return returnImage;
}
}