Change Image size and resolution in vb.net (Windows Application)

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Hi,

How to change the image resolution in vb.net (Windows Application).

Thanks and Regards,
Sivasankaran G

Posted 4-Jul-12 15:41pm

Gssankar

Updated 7-Aug-20 5:11am

v3

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Sergey Alexandrovich Kryukov · Answer 1 · 2012-07-04T18:23:00

Solution 3

This is called image resampling. Please see also my comment to the answer by Abhinav.
One good .NET solution could be found here:
http://stackoverflow.com/questions/249587/high-quality-image-scaling-c-sharp[^].

[EDIT]

In response to OP's request for additional explanation.

I don't know what else to explain as it should be clear from the discussion I've referenced. Perhaps you need to understand better the concept of resampling. The please see:
http://en.wikipedia.org/wiki/Resampling_%28bitmap%29[^].

—SA

Posted 4-Jul-12 18:23pm

Sergey Alexandrovich Kryukov

Updated 4-Jul-12 20:07pm

v2

Comments

Gssankar 5-Jul-12 0:50am

Hi Sergey Alexandrovich,

I am confused. can u explain in brief

Sergey Alexandrovich Kryukov 5-Jul-12 2:09am

I'm not sure what else to explain. Perhaps you can ask about something you are confused about.
Please see my update, after [EDIT].
--SA

Abhinav S 5-Jul-12 1:43am

My 5. IMO though, this would be little complex for the OP.

Sergey Alexandrovich Kryukov 5-Jul-12 2:08am

Thank you; you are probably right as OP asked for additional explanation.
--SA

Abhinav S · Answer 2 · 2012-07-04T16:02:00

Solution 1

Have a look at the TransformedBitmap class[^].
This would allow you to change the size of your image.

Changing the image resolution is not that easy. Scaling an image will make an image look bigger - but there will be changes in the way it appears. It will appear softer. Cropping and Scaling Images[^] should help you with scaling.

Scaling is based on one of various alogrithms that you could apply.

Posted 4-Jul-12 16:02pm

Abhinav S

Comments

Gssankar 4-Jul-12 22:29pm

Hi Abhinav,

Thanks for your response. i will try.

Thanks and Regards,
Sivasankaran G

Gssankar 4-Jul-12 22:30pm

hi,

Is this possible to change the resolution in vb.net windows application.

Abhinav S 4-Jul-12 23:26pm

You could, but you would need to write some complex code.

Sergey Alexandrovich Kryukov 5-Jul-12 0:24am

Complex? Well, it depends what one uses. I added my answer with a link to one solution, please see.
--SA

Sergey Alexandrovich Kryukov 5-Jul-12 0:17am

You are talking not about resolution, but about the size of the image in pixels.
The resolution is something like number of pixels per inch or per mm. It is stored in some images and is not very significant; for example, it can be considered as metadata used in such things as printing with options "use original resolution". What OP asks is called re-sampling. And it is available in .NET.
--SA