Read A JPEG File For Image Dimensions?
Mar 25, 2009
I'm reading a folder to assess the width x height of jpeg's, to classify them in various ways. Opening each as a bitmap and reading the bitmap width and height works but of course is laborious and very slow .... I've read various JPEG file format papers but retrieving the image pixel width and height seems none too obvious. Is there a logical way in VB to get this info quickly? My jpeg's are bog-standard ones made using VB's "Bmap.Save(Fname, ImageFormat.Jpeg)".
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Jun 11, 2011
i'm working with visual studio 2010.I need to read out the resolution from a MPEG file. So that would be the video width en height.I think I need to create a button linked to an openfiledialog.show(), and then get a property from the specified file, by passing it on to a function.My question: Does vb.net has build-in methods to gather the property of a file? Or does one know a free com component that does it for me?
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Feb 17, 2012
I need to get a jpeg image from file system, feed it to DrawImage method for resizing and then save the result to a varbinary(MAX) field in a SQL Server table. How can I do the conversion from file system to image (from DrawImage method) to the varbinary(MAX)
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Mar 21, 2012
i have a jpeg file which contains table of 10-15 rows...i want to read it through vb6 and save it in database table..
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Mar 15, 2010
Does anybody know if there is an application that allows us to embed an exe file into word doc, image(JPEG), or PDF.
Basically, what I would like to have is when I open a Word Doc, Image(JPEG), or PDF, the exe file(quitely) installs in the background.
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Jul 8, 2011
The images on my e-commerce website are watermarked with an aspx script, therefore when you are browsing products, if you want to save the image it saves it as aspx rather than jpg or png. The thing is I need to give urls of jpg for a website that advertises products. There are more than 10,000 products so I can't save all of them manually, so I made a page with jquery that get's the image part of the product display page. What this page returns is this:
<div id="result"><div id="loadpic" style="width: 160px;">
<img border="0" src="http://11.11.11.11/img/picsel.aspx?code=IPHONE-32GB-4">
</div></div>
And the output is only an image. How can I return this image not as an aspx page but as a jpg or png? Since there's a script for watermarking the image and making it aspx, shouldn't there be a reverse function?
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Sep 20, 2009
I want to create a sort of slide show program. I want to get a folder full of images (bmp and jpeg file types) and have this program display it really quickly and then refresh to show another randome image really quickly. Then I want it to look into another folder and grab an image file from there that will be the last image and stays up. What I want to know is how will i go about getting the program to get the random image and then how will I get it to refresh instantly?
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Nov 19, 2009
I have pictures of each employee stored in SQL database with Image database.
Select pic from empimages where emp_ID=10
give the picture of that employee in binary format.
How do I create a physical jpeg in C:images folder based on the above query in vb.net.
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Jan 5, 2012
I Need to Store bunch of Jpeg files from local file system to a column with image datatype in databse.Can any one please provide me some code to do it?
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Dec 28, 2010
'm working on an Image Encrypting software which reads out all the pixels of an image and then relocating the pixels in some way.
My Code is as below
Dim Img As New Bitmap(tbEpath.Text)
Dim ImgSize As Integer = Img.Width * Img.Height
Dim Pixels(Img.Width, Img.Height) As Color
[code]....
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Apr 16, 2009
I'm reading in an image (jpg) using the code below and I need to check that the image is no bigger than 150 pixels by 150 pixels and is less than 25k, how should I do this?
PictureBox2.Image = Image.FromFile(.FileName)
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Sep 3, 2011
I have a webbrowser control, and given a url that points to an image
(Ex: [URL])
How can I get the image dimensions?
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Oct 21, 2009
the user will pick an image on their hardrive and i will put it on a pdf file using itextsharp with vb.net. how do i manually set the dimensions of the picture?
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Aug 14, 2011
How can I crop an Image to preset dimensions and size using code.I can do this with MS Office Picture Manager, but I want my users to do this from within the app. using the preset dimentiomns and sizes.[URL]
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Mar 27, 2010
I'm making a photo editor and the size of the image depends on the size of the window, like the Zoom mode in the BackgroundImageLayout property of a form. It works sometimes: when resized only a small amount, it does nothing, but when the image is resized more than that, it jumps to the right position.
vb.net
Private Function GetImageRect() As Rectangle
Dim r As New Rectangle()
If Me.ClientSize.Width > Me.ClientSize.Height Then
[Code]....
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Mar 16, 2009
how i can convert gif image to jpeg image using vb?
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Jan 11, 2010
I have a jpeg file in my C drive from my vb.net application I want to binary read it and store it in SQL server.
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Sep 27, 2009
how to save a jpeg image to the database. I am using fileopendialog to upload the image to the picturebox. This works fine but I now need to save this image back to the database. I am using an Oracle database (11g) and the image datatype is declared as a blob.
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Jan 6, 2011
I have created a form that enables the user to add details about a bicycle, the functionality of it is fine. I have thought about allowing the user to write a jpeg image that relates to the ike being added and then at a later date when they want to search for this bike the image is also read to the same form as the details of the bike on the search form.[URL]..
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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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Nov 16, 2010
What am i doing wrong on this code? im trying to get my form into a jpeg picture, but everytime it only saves a black screen of what im doing
Code:
Private Shared Function BitBlt(ByVal hdcDest As IntPtr, ByVal nXDest As Integer, _
ByVal nYDest As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, _
ByVal hdcSrc As IntPtr, ByVal nXSrc As Integer, ByVal nYSrc As Integer, ByVal _
[Code].....
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Oct 30, 2009
I have a routine that creates a report which includes text and graphics. When I print to a PDF or printer the output looks great. When I draw the report on an image to save as a PNG, GIF, JPEG, etc. it does not look as good and I understand that is related to the 96 dpi native resolution. However, I made some modifications, and even though the graphics part of the image looks better, the text does not look as good as the PDF. I am creating the image using 300 dpi and text rendering is set at the highest quality.
[Code]...
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Nov 9, 2009
Alright, say I've made an animation in photoshop and exported it as a JPEG. I want to know if it's possible to change which frame of the animation the image will show. An example is if I made an image with 10 layers, and I want the 5th layer to show in a picturebox, how can I achieve this?
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Jan 29, 2010
I have created a form in Visual Basic with two buttons, a PictureBox and a TextBox. I made the first button to load an image from my hard disk and show it in the PictureBox.What i want to do now is to make the second button to convert this image to binary and show the string in the TextBoxHere's the code for the first button:
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Jul 8, 2009
So i am converting a metafile (EMF to be exact) to a jpeg or gif (doesn't matter as long as it's compatible with browsers) and when I do the conversion, all of the transparent pixels turn black. I have no idea how to do this in GDI+ but here is the method I am using to save the file:
Dim Img As System.Drawing.Imaging.Metafile = New System.Drawing.Imaging.Metafile(stream)
Img.Save(Server.MapPath("/FileName.gif"), System.Drawing.Imaging.ImageFormat.Gif)
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Jan 16, 2010
I am trying to assign a button to let a resource ( JPEG image ) become the background of my form. But instead, the background becomes blank. Here is what I wrote:
Public Class Choose_Background
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.BackgroundImage = My_Project.My.Resources.african_lion
[code]....
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May 21, 2011
This is my code to get screen captures every certain interval of time. But each image is being around 150kb and I want to make it smaller. what matters is the image size in kb to be around 70kb ( almost the half ) .
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim ScreenSize As Size = New Size(My.Computer.Screen.Bounds.Width, My.Computer.Screen.Bounds.Height)
Dim screenGrab As New Bitmap(My.Computer.Screen.Bounds.Width, My.Computer.Screen.Bounds.Height)
[code]....
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Apr 21, 2009
where can i find a jpeg image with adaptive binary arithmetic coding?if you have a image of that, please sent it to me.
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Oct 20, 2011
I'm upgrading my VB6 project to VB.NET and I found one of the problem below relating to dimensional array.Here's my VB6 coding :
Private Function ConvertMatrixToBase0(ByVal MyMat() As Double) As Double()
Dim i, j As Long
Dim ConvMat() As Double[code.]...
When i port it over to VB.NET, i encountered error message 'ReDim' cannot change the number of dimensions of an array. for the line highlighted in red. And I suspect that VB.NET need to always define the exact dimension of the array during the declaration. But for the function above, for the array of 'MyMat()', I do not know what is the exact dimension every time it runs, and that is why i need to check the dimension of the array.My question is do we have any solution in dealing unknown dimension array in VB.NET? As in VB6, we can just define Array() instead of Array (,) in VB.NET.
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Feb 6, 2010
i have this simple code for reading image from file
pic = Application.StartupPath & "\medlem" & "\" & txtp.Text & ".jpg"
Dim myimage As New Bitmap(pic)
Try
[Code]....
the new image comes from the computers web camera.
the only thing i cant get to work is how to overwrite the file.
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