Save a Image from a picturebox to harddisk in binary format

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I want to save an image in picturebox with binary format(1bpp) but VB.net doesn't support this. What do I do? Please help me in coding this.

VB

If SaveFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then
    ptr2.Image.Save(SaveFileDialog1.FileName)
    mnuclose.Enabled = True
End If

Posted 26-Mar-11 23:14pm

smile.avatar

Updated 27-Mar-11 12:01pm

Manfred Rudolf Bihy

v3

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Аslam Iqbal 27-Mar-11 7:00am

Edited for <pre="vb"> tag.
What is the error? This code works fine.

Sergey Alexandrovich Kryukov 27-Mar-11 15:43pm

OP commented: "but the format is not binary!"

@Smile.Avatar: all files are always binary. When you understand this first, you will be able to understand what is the text file, etc. No sooner.
--SA

Sergey Alexandrovich Kryukov 27-Mar-11 16:11pm

Aslam, I received you "????" somewhere, probably related to deleted post.
I'm assuming it was addressed to OP. That was my reaction, too.
I think this is about confusion with the binary.
--SA

Аslam Iqbal 27-Mar-11 16:20pm

yep

Sergey Alexandrovich Kryukov 27-Mar-11 16:22pm

Aslam, I finally noticed "1bpp" and gave a big and non-trivial Answer (because the problem is non-trivial). I don't thing it's of any use to OP, because of apparent OP's level, but -- please take a look.
--SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-03-27T10:21:00

Binary image format has nothing to do with "1bpp" (one bit per pixel) — all formats a binary! You're just confused.

If you really need one bit per pixel, the problem is not fully defined, as this is the operation with data loss, so it should be defined what part if information you agree to loose or what are the criteria to classify a pixel into 100% white or 100% black.

This is not a trivial task. One possible meaning of it would be the "posterization" into two tones. A low-quality solution is discrimination of the pixel by some criteria as "brightness", so there can be many different solution (depending on selected level). A high-quality solution is really a complex task related to image recognition. You need to learn some basics of image recognition to understand this. Image recognition is a whole branch of science.

—SA