C# Discussion Boards - CodeProject

yogesh_deshmukh7-Jan-09 2:51

7-Jan-09 2:51

how to select salient part of image ,salient means important part for which we taken out photograph, no matter what is background ,floor,sky...

Re: about saliency extraction

Eddy Vluggen7-Jan-09 4:41

Eddy Vluggen

7-Jan-09 4:41

There are no standard-functions to do this in .NET that I'm aware of, I'm afraid you'll have to roll your own.

You're baking a photographers-paintprogram?

I are troll Smile | :)

Re: about saliency extraction

yogesh_deshmukh7-Jan-09 19:39

yogesh_deshmukh

7-Jan-09 19:39

actualy we r making image collage project which will show salient part of images and so is there any way by using intensity,saturation,hue of pixels we able extract that part

Re: about saliency extraction

Eddy Vluggen8-Jan-09 0:24

Eddy Vluggen

8-Jan-09 0:24

This class can serve as an example on manipulating colors. Or, you can take a look at MSDN, and take a look at the GetSaturation method of the Color-class.

You got a though project on your hands there.. If I understand you correctly, you'll have to iterate through all the pixels, and judge them based on hue/intensity/color/something?

I are troll Smile | :)

Re: about saliency extraction

yogesh_deshmukh9-Jan-09 2:05

yogesh_deshmukh

9-Jan-09 2:05

Yes,now we r just considering pixels intensity factor,but problem with that is time required for two for loop quit large for getpixel(),setpixel() fun so is there other method so that we can increase speed of execution?

Re: about saliency extraction

Eddy Vluggen9-Jan-09 2:18

Eddy Vluggen

9-Jan-09 2:18

Have you considered Parallel.For? Personally I prefer the AForge version, as it only requires .NET 2.0. It's quite an improvement in execution-time if you got a dual-core (or better) processor Smile | :)

Just noticed that the author is also doing a lot of image-manipulation.

I are troll Smile | :)

Re: about saliency extraction

yogesh_deshmukh9-Jan-09 19:37

yogesh_deshmukh

9-Jan-09 19:37

Thanks, we will implement it

Re: about saliency extraction

yogesh_deshmukh16-Jan-09 20:32

yogesh_deshmukh

16-Jan-09 20:32

i implemented parallel for loop but in below code it is throwing exception 'invalid operation for gepixel and setpixel' is it possible to use gepixel() in this context please help!!
AForge.Parallel.For(py1, py2, delegate(int z)
{
for (x = px1; x < px2; x++)
{
Color pixelColor = image2.GetPixel(x, z);
img1.SetPixel(x, z, pixelColor);
}
});

Re: about saliency extraction

Eddy Vluggen18-Jan-09 2:34

Eddy Vluggen

18-Jan-09 2:34

The AForge-framework provides an abstraction with it's Parallel.For, from threads. The framework actually generates some threads on the background, to execute the For-loop. Hence, the same rules apply to threading; you're not allowed to access variables from other threads.

See the BackgroundWorker class for more details on these limitations.

I are troll Smile | :)

Display numbers in HEX - DataGridView?

liqnit7-Jan-09 2:46

liqnit

7-Jan-09 2:46

Hi I am using VS2008 C# with datagridview and filling the cells using a byte[].

Is there a away the cells will display the value in HEX ?
Thanks

Have a nice Day

Re: Display numbers in HEX - DataGridView?

DaveyM697-Jan-09 2:58

DaveyM69

7-Jan-09 2:58

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Re: Display numbers in HEX - DataGridView?

liqnit7-Jan-09 3:30

liqnit

7-Jan-09 3:30

thanks a lot .
Maybe i am missing somthing is therea way of not converting to string and display the value as Hex
Thanks

Have a nice Day

Re: Display numbers in HEX - DataGridView?

DaveyM697-Jan-09 3:46

DaveyM69

7-Jan-09 3:46

A simple method like this should do it:

public string ToHexstring(byte[] byteArray)
{
    if (byteArray.Length > 0)
    {
        StringBuilder resultBuilder = new StringBuilder();
        foreach (byte value in byteArray)
            resultBuilder.Append(value.ToString("X2"));
        return resultBuilder.ToString();
    }
    else
        return "00";
}

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Re: Display numbers in HEX - DataGridView?

Dave Kreskowiak7-Jan-09 5:57

Dave Kreskowiak

7-Jan-09 5:57

The mear fact that a number is being displayed in the DGV makes the item you see in the DGV cell a string, no matter what the actual data type is. So, no there's no way of displayed any data in a DGV without converting it to a string, or some other custom rendered display.

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cut,copy,paste a picturebox control in c#.net at runtime

shabanab7-Jan-09 2:33

shabanab

7-Jan-09 2:33

how to cut,copy,paste a picturebox control in c#.net at runtime, can u please provide code for this.

Don't repost

Eddy Vluggen7-Jan-09 2:38

Eddy Vluggen

7-Jan-09 2:38

Don't repeat the same question over and over.

http://www.codeproject.com/script/Forums/View.aspx?fid=1649&msg=2868845

I are troll Smile | :)

Re: Don't repost

Eddy Vluggen7-Jan-09 2:43

Eddy Vluggen

7-Jan-09 2:43

Now, as to answer the darned question;

A PictureBox is a place-holder for a picture, in the same way that a label is a placeholder for text. Both don't have the cut/copy/paste functions, because they aren't editable.

A Textbox is the placeholder for text that can be edited. There is no placeholder for editable pictures.

In other words, what is supposed to happen when you "cut" something from the PictureBox? Should it remove the entire picture, or just a selection thereof? The first "cut"-mechanism is easy to implement, as you just need to assign "null" to the image of the picturebox. The second "cut"-mechanism is harder to code.

What about "paste"? Do you want to insert a new picture in the picturebox, or do you want to combine the picture with what you are pasting?

I are troll Smile | :)

Re: cut,copy,paste a picturebox control in c#.net at runtime

Not Active7-Jan-09 2:45

Not Active

7-Jan-09 2:45

shabanab wrote:
can u please provide code for this.

Sure, but first we need to talk about how much you'll pay.

only two letters away from being an asset

Re: cut,copy,paste a picturebox control in c#.net at runtime

Dragonfly_Lee7-Jan-09 18:43

Dragonfly_Lee

7-Jan-09 18:43

shabanab wrote:
can u please provide code

Normally, you can not get the answer if the question looks like this. Dead | X|

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Reading Binary Database

Muammar©

7-Jan-09 2:21

you know, the .dat format. Any clue how to do it?? Is there some sort of stream we can use or a library??

Please advise.

All generalizations are wrong, including this one!
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Re: Reading Binary Database

DaveyM697-Jan-09 2:26

DaveyM69

7-Jan-09 2:26

Check out the BinaryReader[^]

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Re: Reading Binary Database

Colin Angus Mackay7-Jan-09 2:30

Colin Angus Mackay

7-Jan-09 2:30

Muammar© wrote:
you know, the .dat format. Any clue how to do it??

.dat is typically a generic file extension used to denote that it is an internal format for some application. We cannot know the format unless we know the application to which it belongs.

Muammar© wrote:
Is there some sort of stream we can use or a library??

You can open the file using a FileStream and a BinaryReader, but you'll need to know how it is formatted internally to be able to interpret what you get back.

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Re: Reading Binary Database

Muammar©

7-Jan-09 19:55

True.. I managed to get the format from the database designer.
Thanks Colin! And congrat's on being an MVP again!

All generalizations are wrong, including this one!
(\ /)
(O.o)
(><)

Setup tool

blackjack21507-Jan-09 2:12

blackjack2150

7-Jan-09 2:12

I had very little experience with creating setup projects. If i remember well, the Publish tool from VS creates a MSI file, that installs the application, but does not allow the user to specify an installation path or other options. This is called Click Once deployment, right?

What I need is an installer which will allow the user to specify an installation path. What do you recommend? (preferably free). Thanks.

Re: Setup tool

Colin Angus Mackay7-Jan-09 2:17

Colin Angus Mackay

7-Jan-09 2:17

blackjack2150 wrote:
What I need is an installer which will allow the user to specify an installation path. What do you recommend? (preferably free). Thanks.

What about the Setup Project already in Visual Studio?

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