Thanks for the link supra, it's helpfull but I think Larry is right, that I'm a bit stuck for the 8 bit indexed pixel format, but it isn't a big disaster, only bigger images
Thanks and Greetz Peter
--
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
"Supra" <
[email protected]> schreef in bericht i did test my owned bmp and the file size is 3.6 mb and downsizing to 67kb and i saved as supra.bmp.
i don't know if this website could help u.
http://www.devx.com/dotnet/Article/18163/0/page/3
regards
Peter Proost wrote:
I mean I need to save it as .bmp file, and with your encoder parameters it becomes a jpeg but with a .bmp extension and some imaging programms have problems with this
Greetz Peter
--
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
"Supra" <
[email protected]> schreef in bericht rephrase it "but I need .bmp file" ..what do u mean....u can't find file?
regards
Peter Proost wrote:
I know, but I need .bmp file
Greetz Peter
--
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
"Supra" <
[email protected]> schreef in bericht u can change extenison u want.ico, jpg or bmp etc
Peter Proost wrote:
Hi supra, thanks for your answer, it works but in some picture programms it
gives a warning because it's actualy a jpeg image with a bmp extension
Greetz Peter
--
Programming today is a race between software engineers striving to build
bigger and better idiot-proof programs, and the Universe trying to produce
bigger and better idiots. So far, the Universe is winning.
"Supra" <
[email protected]> schreef in bericht
i proost,
i created compressed bmp. there is not control to be added.
Option Explicit On
Option Strict Off
Imports System.Drawing.Imaging
Imports System.IO
Module ImageCompression
Private Function GetEncoderInfo(ByVal mimeType As String) As
ImageCodecInfo
Dim i As Integer
Dim Encoders() As ImageCodecInfo =
ImageCodecInfo.GetImageEncoders()
For i = 0 To Encoders.Length - 1
If Encoders(i).MimeType = mimeType Then
Return Encoders(i)
End If
Next
Return Nothing
End Function
Public Sub main()
Dim codecInfo As ImageCodecInfo = GetEncoderInfo("image/jpeg")
Dim enc As Encoder = Encoder.Quality
Dim EncParams As New EncoderParameters(1)
Dim Dir As New DirectoryInfo(Directory.GetCurrentDirectory())
Dim image As Image = image.FromFile("C:\Documents and
Settings\My Documents\Visual Studio Projects\VbNet\project\Image
Compression\bin\supra_1.bmp")
Dim jpgName As String
EncParams.Param(0) = New EncoderParameter(enc, 25L)
jpgName = Path.GetFileNameWithoutExtension("C:\Documents and
Settings\My Documents\Visual Studio Projects\VbNet\project\Image
Compression\bin\supra_1.bmp") & "0" & ".bmp"
image.Save(jpgName, codecInfo, EncParams)
End Sub
End Module
hth.
regards
Peter Proost wrote:
Hi group, I've got a question about the size of a saved bitmap.
What I need to do is open a bitmap if it needs resizing, resize and save
it.
This isn't a problem, but the problem I have is that the original image
has
got an 8 bit indexed pixelformat,
but you can't create a graphics object for this pixelformat so my bitmap
uses the default pixelformat:
Format32bppArgb, but this ofcourse result in a much larger file size
(420kB
instead of 106kB)
I know I can use for example Format24bppRgb and this reduces the size to
300kB but I would like to know if I there's a way I can keep the size at
106kB
Thanks in advance
Greetz Peter
