Comments by ready to learn (Top 58 by date)

What about creating list of list of list? and how can I access to a special element?

thanks it's good.I think I didn't ask well.If I have the point(4,5)=6 , I want the 4 and the 5 to be shown on the lines of the chart, not the 6.

I only ment that I want to see the values on chart

Thanks a lot, It works well. But I need to access the control int the class body , not in it's function.Is there a way to do it?

Thanks a lot again

Thaks a lot it worked well.What if I don't know the installation path.suppose that I want to instal my project on another computer.Then How can I set the path?

I tested it .by using this method only a window opens which I can select the console project from.Then the console projects opens in vs window. I want the console project to run in a black screen.

Thanks for your answer.I updated the question.

Manfred R. Bihy,I have visited these sites buit I don't know how to write the codes.What I sent was N nswer to Richard MacCutchan.

Thanks a lot for your patience and step by step answer.this code runs well but when custom opens the backimage nothing apears ,unless he moves the mouse on the panel.when moving the mouse without clicking ,it draws the backimage.when custom opens the front image the front image is shown and when moving the mouse(without clicking) it draw the back image.Second problem is that the front image is shown streched (the backimage and the front image are the same size).I should again say that I'm so thankfull for your attempt and attention.

You answer is here:http://www.emgu.com/wiki/index.php/Tutorial and http://www.emgu.com/wiki/files/1.3.0.0/html/259ba717-fc88-a05c-cbd1-640a82dcc7bb.htm

I updated the question wishing you help me.

I want to load image1 on myPanel.(by clicking button1)then I want to load image2 on the same panel.( by clicking button2).then I want to earase the parts of image2 by using mouse(user chooses where to be erased)so that where ever the user erases, ,He can see image1 .

I ment when I want to do the earasing it occured.I set the panel as AutoSize but it didn't help.As I'm new in this field_and I think you know it_ and I really need this codes.Please write all the codes which should be used.Thanks

When I use your code the panel devides to four parts and each part shows a picture.When draging on it,nothing occurs

Thanks a lot OriginalGriff for your attention and answer

sorry to ask again.But I can't understand what should I write in the OnPaintBackground method.

can you explain by giving codes please?

It's obvious that I don't want my image to flash horrible.How can I have two regions? and how should I use them? please guide me as you alwase did.

I used this way but if I want to set the backgroundImage of my image in the paint function,the image will lights up during drawing and if I want to se the backgroundImage in another function,then how should I darw on it?Edited:if I use this method,then I can use paint function to draw lines_by using mouse. which function should I use to draw lines _by clicking button?

Thanks a lot.your answer is helpfull.I found an article which _I think_ provides the codes of what you explain.

Sorry, I deleted it because I got my answer and I didn't want to extand the question by the sentence not related to it.You could have deleted your comment too.Any way to avoid making you angry,I modified the comment.

Your code works well.But when messuring scale, the picture lights up.To make it not to light up, I deleted "Grafics g = e.Grafics;" and "g.drawImage(muimage,new Point(0,0));" and set the backgroundImage of my panel where I wanted to load the image by the code: " myPanel.backgroundImage = myImage " and now I should say thanks a lot for your great help.

Thanks again OriginalGriff for your help.

that's very good.as I searched for paint event and onpaint event, They occur whenever the form changes,for example when I drag the form, the paint event will occur.doesn't it make a ploblem? means that by using the way you suggest ,If I drag the form ,will I loose my previous painting?

system.drawing.I want to use emgucv and it's watershed function.this function uses itptr.I have used bitmap in my project and now I want to add watershed function to it.so I want to convert bitmap to intptr

It worked for me, thanks

Thanks for your attention.to answer you, I updated the question.

the length of my array depends on the length of my picturebox which is not reachable in my form.

Thanaks a lot.your answer was the easiest and for me the best one.I set FotmBorderStyle to sizable.The one helped me was changing AutoSizeMode to GrowOnly.

Thanks a lot Chris.Your article helped me a lot,as I found your answer the best one,I want to ask you another guestion:"what does each class in emgucv do and how can I use them?"Is there an e-book which can help?Thanks again in advance

you are just right,but I dont know how to create clone of input array

I didn't get you well,But all the functions create the same problem for me,means that if I use arrayG or arrayB or ... as entrance for showPic, the result will be tha same and showPic shows me the binary picture.

I'm nearly sure those things you saied doesn't occur. once I had this problem with passing bitmap through functions and I solve it by:
bm = (Bitmap)bm.Clone();
Is there a way like that which I can use now?

yes,sure

you are right.but I want to use that array to make a bitmap

yeah.and how can I do that?

I explaned more for OriginalGriff ,please read my explanation,besides I should say I want that list sorted by color so that I start from the least integer(color),go on, and reach the pixcels which have that color.I will show you the algorithim If I can

I want to write watershed algorithim which determines the areas of the picture(according to the color).One of the steps in the algorithim I found is what I explained.after all I would be so thankfull if you help me to solve my problem or give me another watershed algorithim which doesn't cost this problem.

thanks a lot.I think it works

can you please change the code so that this problem doesn't take place?I return the image in another one

do you mean that if I want to pass the bitmap it will be passed by refrence?notice that I didn't use "Ref".

sorry this is true:
private Bitmap gray(Bitmap bm)
{
st_g.Start();
int cal;
BitmapData bmdata = bm.LockBits(new Rectangle(0, 0, bm.Width, bm.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
IntPtr scan0 = bmdata.Scan0;
int stride = bmdata.Stride;
unsafe
{
byte* p = (byte*)(void*)scan0;
int offset = stride - (bm.Width * 3);
for (int i = 0; i < bm.Height; i++)
{
for (int j = 0; j < bm.Width; j++)
{
cal =Convert.ToInt32( (p[0] + p[1] + p[2])/3);
p[0] = p[1] = p[2] = (byte)cal;


p += 3;
}
p += offset;
}
}
bm.UnlockBits(bmdata);
st_g.Stop();
return bm;
}

Thanks for your answer,I did refrences and used API but can you explain more about interop wrapper class?and what should I do at last?

Thanks abhinav.the other question is that:Is it possible to call the dll only with istalling the MCR? or do I have to install the MATLAB completly?

Thanks again Richard

Thanks for your attention SAKryukov and Richard MacCutchan.
Here is some of my codes;
when running,I got the exception:
'Access Violation Exception' on the underlined line.how can I solve it?
On the other hand, how can I control the pointer?


<pre><pre lang="cs">BitmapData bmdata = bm.LockBits(new Rectangle(0, 0, bm.Width, bm.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
IntPtr scan0 = bmdata.Scan0;
int stride = bmdata.Stride;
unsafe
{
int g;
byte* p = (byte*)(void*)scan0;
byte*t=null
int offset = stride - (bm.Width * 3);
for (int i = 0; i < bm.Height; i++)
{
for (int j = 0; j < bm.Width; j++)
{
t=p-n3-(stride*n);
if(t[0]==255) g++;
p += 3;
}
p += offset;
}
}
bm.UnlockBits(bmdata);
return bm;</pre>
</pre>

I want to use System.Drawing

you helped alot.thank you.but I still dont know how to realize when the pointer refers to the area not belonging to my image.

thanks a lot.I think bitmap and unsafe is what I need.I used them to do my project.As I want to do some changes in the picture I can use pointer or arrays.when using the pointer, I dont know how to realize whether the pixel under use exists or not.what's the solution?another question is "will the running time be accessible If I copy the image in an array and do the chanes in the array?"