Convert Image File Bytes Into RGB Values?

Oct 16, 2011

Is there anyway to convert an image file bytes array into an array of the real RGB values of that image?

I don't really want to use GDI+ or the System.Drawing library, but simply apply a certain calculation/processing to every byte of the image file and get another array that contains the RGB values of every pixel in that image. I know it could be done as I know how to do it in a different programming language (Python) but not in Visual Basic.

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How To Convert Array Of Bytes To Image

Aug 13, 2010

Is it possible convert an array of bytes (PNG format) to image and then, show it in a picture box control?

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VS 2008 How To Convert Image To Bytes

Feb 3, 2010

i'm trying to convert an image into bytes in vb.net but i failed, i searched the web and threads over here, but seems that i couldn't find any working example or code.

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Convert - Bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16)

Feb 22, 2010

See where my vb.net equivalent of a working c# assignment statement is not working?

bytes(i / 2) = Convert.ToByte(hex.Substring(i, 1), 16)

Here's the c# followed by the vb.net function.

private byte[] StringToByteArray(String hex)
{
int NumberChars = hex.Length;
byte[] bytes = new byte[NumberChars / 2];

[CODE]...

And the vb.net that is throwing the error within the for loop

Private Function StringToByteArray(ByVal hex As String) As Byte()
Dim NumberChars As Int16 = CShort(hex.Length)

[CODE]...

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Read 2 Bytes Out Of 4 Bytes From A Text File?

Sep 22, 2011

I created a text file contains 4 bytes of data

AABBCCDD

I just want to read the first 2 bytes (AABB) to execute it with my program.

Then I'll need to read the last 2 bytes (CCDD) for another computer routines

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.net - Convert Raw-Image-Data Into Image File (*.jpg)?

Apr 28, 2010

The coding below is to retrieve the Raw Image Data from the Database and then write as a JPG image file. The problem is the image file (image.jpg) is "nothing" after file created. I guess there is something wrong in the following coding.

fs.Write(rawData, 0, fileSize)

No any runtime errors I can find, and I double check rawData (i.e. Buffer) contains data. But don't know why there is "nothing" inside the image (image.jpg).

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim fileSize As Integer
Dim rawData() As Byte

[code]....

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VS 2008 - Read A 16bit Binary File (tif Image) And Pixel Values Of The Image Ranges From 1200 To 4500 - EndOfStreamException Unhandled Error

Mar 18, 2012

I am trying to read a 16bit binary file (tif image) and pixel values of the image ranges from 1200 to 4500. I tried to use BinaryReader using ReadUInt16 but I get EndOfStreamException Unhandled error. ReadByte method works fine with an 8bit tif file. I do not know how to read a 16bit image file using binaryReader. Shouldn't I use ReadUInt16 since values of pixels range from 1200 to 4500?

[Code]....

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How To Convert Bytes To KB / MB Or GB

Mar 8, 2009

My app displays the bytes downloaded in a label using:
Private Sub MyDownloader_DownloadedByteCountChanged(ByVal ByteCount As Integer) Handles MyDownloader.DownloadedByteCountChanged
lblDownloaded.Text = ByteCount.ToString()
End Sub
But I thought it would be 'nicer' if it display the amount as kb/mb/gb, etc.

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.net - Convert A Single Into 8 Bytes?

Jan 6, 2010

I have a single that might have a decimal place but might not. I have to put the digit before the decimal into the first 4 bytes and the digit after in the next 4 bytes.

So 1.1 would be 01-00-00-00-01-00-00-00
or 2.1 would be 02-00-00-00-01-00-00-00
or 1 would be 01-00-00-00-00-00-00-00

The digit before the decimal point is stored like an integer in bytes the same with the digit after the point. So 1.1 gets split into 1 and 1 and then stored as 2 DWORDS: 01000000 and 01000000

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Convert HEX/Bytes To Base64?

Dec 28, 2010

I'm trying to convert standard bytes like so:

00DEAD00BEEF0000

and convert it to base64.

I want it to go from bytes -> Base64.

Not

String -> Base64.

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Convert Any File To Image?

Jan 8, 2011

I need to convert any file (word, excel, pdf...) to an image (jpg/tiff..).Because I intend to preview the content of the first page of the file/document in a small frame (small window).

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Convert To An Image File?

May 22, 2009

I'm studying for a memorization-intensive exam, and have lots and lots of lists to memorize. I have a Sony Walkman that can show *.JPG files and I had an idea. I want to create some video flashcards so I can study anywhere/any time. The idea is simple: I have some text that I want to convert to an image file. No, this isn't homework for a class. My experience to date has been 100% Excel/Access/Word related, so I'm completely out of my realm when it comes to images.

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C++ Convert String To Bytes To Send Over Tcp?

Jun 13, 2011

I'm trying to send a 28 character string to a remote ip address and port. I've done this successfully in vb.net using the following code snippets:

Dim swon As String = "A55A6B0550000000FFFBDE0030C8"
Dim sendBytes As [Byte]()
sendBytes = Encoding.ASCII.GetBytes(swon)
netStream.Write(sendBytes, 0, sendBytes.Length)

I now have to convert this across to c++ and have the following so far:

char *swon = "A55A6B0550000000FFFBDE0030C8";
array<Byte>^ sendBuffer = gcnew array<Byte>(bufferSize);
sendBuffer = BitConverter::GetBytes( swon );
tcpStream->Write(sendBuffer, 0, sendBuffer->Length);

but am getting stuck at this point. I'm sure I'm missing a simple syntax error but I can't figure it out!To clarify, I'm not getting an error, but I don't think the string is being converted to bytes correctly as when I convert back, I just get a '01'

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Convert 4 Bytes To IEEE 754 32-bit Float?

Mar 15, 2011

I am receiving a data stream which contains 4 bytes of data which need to be converted to a 32-bit float (IEEE 754). This was easy to do in C as I created a union with a 4-byte array and a 32-bit float. Job done. However I have no idea how to accomplish this in VB (pls note I do not code in VB).

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Convert Bytes To Readable Text??

Jul 25, 2009

Is There Any Possible Way To Convert Bytes To Readable text?

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Convert Bytes To String Task?

Jul 19, 2009

Im making a database converter (phpbb to ipb)I noticed during analysing both databases that the posts of phpbb are converted to bytes as you can c here

-- Table structure for phpbb_posts
-- ----------------------------
CREATE TABLE `phpbb_posts` ([code]....

I want to convert those to regular text again but I have no clue how to script my converter to lookup the bytes place (after 0x) converts the string (as the bytes arent in array) and where to stop converting the bytes (after the ,)then replace the bytes text by the regular text and this needs to be in a loop because all posts need to be converted to normal text.

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Convert Bytes To XML Legal Text?

Aug 8, 2011

I have to store the bytes of a image file inside of an XML file that is read by another program... The problem is, if I inject it as just plain bytes, the end-program has an error (presumably because it contains non-legal XML characters). How can I convert bytes into something that XML can legally read? I really have no other options at this point. I have to inject the image file as bytes (specifically a .bmp file).

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Convert String Containing Bytes Into Text

Apr 22, 2012

I have string, what contains bytes... (Example below)

And I need convert these bytes into text... But I really don't know how...

Code (For Better understand):

CODE:

and now, how to convert it into text? (The Result text in "ProductName", BTW)(I don't want to use Hex Editor still )

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Convert Image To Text File?

Dec 30, 2010

Im busy making a program but it needs to send an image over a connection. Anyways, it is only possible to sends pieces of strings at the moment. And therefore I want to convert the images I want to send into strings or whatever that can be written in a textbox.Ive been trying stuff with streamreader / write but that didnt work so far.

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Communications :: Convert A HEX String Into A Series 0f HEX Bytes?

Feb 9, 2009

I am working on a project that needs to send hex bytes ie.Sub receives an integer like 276 and then performs

Dim CmdBuf() As Byte = New Byte() {Byte1, Byte2}
strHex = Hex(intNumber) which makes strHex equal to 114 in hex...

Next I need to break into separate bytes something like

Byte1 = Left(strHex, 1)
Byte2 = Right(strHex, 2)

But this does not work......Hex value of 114 needs to be converted into a couple of bytes like &H1 &H14 to be sent out the serial port.

.Write(Buf, 0, 2)

How can I do this?

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Forms :: Convert A Certain Image To An Icon File?

May 22, 2011

well i convert a certain image to an icon file and when i upload it its just a white rectangle in the corner of my app instead of the actual icon???

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Convert Current Screen Into Array Of Bytes In Silverlight3?

Jun 8, 2010

I would like to know if there is any other way than using WriteableBitmap to convert the current screen into array of bytes.Because I am trying to get a screenshot of Esri map, but I am getting "pixel access not allowed" error

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Convert And Saving A Byte Array HEX Values To Binary File?

Jan 16, 2010

I have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.

Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)

[code]....

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Convert And Save Byte Array HEX Values To Binary File

Jun 5, 2011

I have a device with upon serial communication, it send the data as HEX values, (e.g., C020042ABD0F91A103E400F929EBC). I use the following code to get data from the serial port.

Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
Dim bCount As Integer = 4119 ' it is the size of the chunk not block size
Dim data(bCount) As Byte
[Code] .....

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File I/O And Registry :: Convert Image And Save Into Database?

Jun 29, 2011

i would like to upload a File with the Fileupload-Control to a MSSQL 2005 Database. I use Visual Studio 2010 an VB.NET I have also wirte a Code, but i get a Error-Message if i klick die Upload-Butten. "The Website is not available"Why the error-message cam? or can i optimize the code more?

[Code]...

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Socket - BufferReadSize Is Filled With Space When Convert Bytes To String

Sep 9, 2009

The application is working good, i can receive data on port 48888 and i can write it to my logfile, but my problem is when i convert bytes to string. I have the correct data, but all the bufferReadSize is filled with space. Example: if i send only: test, my log file will have test and 4 lines of space only. In my code, right after Dim clientdata As String = Encoding.ASCII.GetString(bytes).

I tried to trim(), replaceI() or any string manipulation, and it's not working!%!? Is there anything i need to do before i can start manipulating that string?

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Build Targa (.tga) Image With Bytes

Jul 16, 2009

I'm working on a Steam Skin Creator. To do so i need to make my app to be able to make Targa images, since the user can change the color of the skin. I need to know how to make a 32-bit Targa image byte by byte, and how to color specific pixels. Here is how the TGA pic will look like ( 10x10 pixels )

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Pulling Image Stored In Bytes From Database?

Jun 10, 2011

The code for this is:

'IMAGE HANDLING
Dim bytes() As Byte = DS.Tables("Location").Rows(0).Item(4)
Dim ProductImage As Image = Image.FromStream(New System.IO.MemoryStream(bytes))
pic_ProductImageDisplay.Image = ProductImage
pic_ProductImageDisplay.Load()

The error occurs line 3 stating "ArgumentException was unhandled: Parameter is not valid."

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How To Convert * .pdf File To An Image File.

May 10, 2010

I need to find out a way to convert * .pdf file to an image file. Can this be done in vb ?If anyone could give me a tip or post a link to good explanation or example

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Reduce Size Of Image File Without Changing Pixels Values?

Oct 13, 2010

I want to programatically delete some pixels that are unused in order to reduce the image size.Can anyone tell me how to reduce the size of an image file without changing the pixels values..

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