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pierrotsc
USA
497 Posts |
 Posted - May 11 2020 : 19:57:41
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i extract 3 layers from an rgb image using:
Blue := ImageEnVect_RGB.Proc.GetRGBChannel(iecBlue);
Green := ImageEnVect_RGB.Proc.GetRGBChannel(iecGreen);
Red := ImageEnVect_RGB.Proc.GetRGBChannel(iecRed);
So i get 3 black and white images.
If i modify one channel and want to merge them back to recreate the modified RGB, how would i do that ?
Thanks
Pierre |
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yogiyang
India
725 Posts |
Posted - May 12 2020 : 01:46:20
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Hello,
You are exacting channel data from an Image.
So the best thing to do is to add each channel as layer and set each layers Operation to its respective type like for example: For Layer with red channel data set the operation to TIERenderOperation(ielRed) for green channel to ielGreen and for blue channel to ielBlue.
Now make changes to any channel you want and then merge them into one layer.
I think this will give what you want to achieve.
HTH
Yogi Yang |
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pierrotsc
USA
497 Posts |
Posted - May 12 2020 : 09:51:26
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Thanks Yogi, but if i use TIERenderOperation(ielRed) for the rd channel, does that gives me a B&W layer ? I am trying to simulate the behavior of photoshop. When you go to channels in photoshop, you get a R,G,B channels that are black and white. When you draw or image process each channel, you do it in B&W but when they are all combined together, you get a color image.
Best |
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yogiyang
India
725 Posts |
Posted - May 13 2020 : 00:55:44
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Hello,
Bu default all channels are in Black & White it is the operation/blending mode that gives it color.
Set the operation to normal and you will get B/W.
Yogi Yang |
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xequte
38176 Posts |
Posted - May 13 2020 : 02:46:12
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Hi
You can use:
procedure SetByRGBChannels(DestBitmap: TIEBitmap; BitmapR, BitmapG, BitmapB: TIEBitmap; fOnProgress: TIEProgressEvent; Sender: TObject);
var
x, y: Integer;
sc, rs, gs, bs: pRGB;
per1: Double;
bmpW, bmpH: Integer;
begin
DestBitmap.Allocate(BitmapR.Width, BitmapR.Height, ie24RGB);
per1 := 100 / DestBitmap.Height;
bmpH := DestBitmap.height - 1;
bmpW := DestBitmap.width - 1;
for y := 0 to bmpH do
begin
sc := DestBitmap.ScanLine[y];
rs := BitmapR.ScanLine[y];
gs := BitmapG.ScanLine[y];
bs := BitmapB.ScanLine[y];
for x := 0 to bmpW do
begin
sc^.r := rs^.r;
sc^.g := gs^.g;
sc^.b := bs^.b;
inc(rs);
inc(gs);
inc(bs);
inc(sc);
end;
if assigned(fOnProgress) then
fOnProgress(Sender, trunc(per1 * y));
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
ImageEnView1.IO.LoadFromFileAuto(ImageEnView1.IO.ExecuteOpenDialog(ExtractFileDir(Application.ExeName), ''));
ImageEnView1.Proc.GetRGBChannelAll( ievR.IEBitmap, ievG.IEBitmap, ievB.IEBitmap );
ievR.Update;
ievG.Update;
ievB.Update;
SetByRGBChannels( ImageEnView2.IEBitmap, ievR.IEBitmap, ievG.IEBitmap, ievB.IEBitmap, nil, nil );
ImageEnView2.Update();
end;
Nigel
Xequte Software
www.imageen.com
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xequte
38176 Posts |
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pierrotsc
USA
497 Posts |
Posted - May 13 2020 : 08:21:26
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thanks Nigel, exactly what i am looking for but i cannot compile it. some properties are missing so does the SetFromRGBChannels procedure. i guess you are using a more recent imageen. i am running 9.0 trial right now.
oh well.
best |
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pierrotsc
USA
497 Posts |
Posted - May 13 2020 : 08:25:21
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let me see if i can use the codeyou give me above instead.
thanks |
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pierrotsc
USA
497 Posts |
Posted - May 13 2020 : 13:58:25
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Nigel, i got it to work. sort of :)
The thing is that i am assigning each channel in imageenlayermview assign to an imageenview. So in the imageenview, i have 3 layers. each layer is a channel. when i click on the channel, it updates the main imageenview. Now when i draw on the imageenview that may be the red channel displayed, it does not really update the channel itself and i cannot figure out on how to find out which channel i am modifying to update the correct one. Am i making sense ? Like if i take your example, i have a source that has 3 layers containing each channel. when i click on the channel, it updates the destination imageenview. but when i draw, i do not draw on the channel itself, i draw on the destination taht is showing the clicked channel.
Any advice to point me in the right direction ?
Best |
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xequte
38176 Posts |
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pierrotsc
USA
497 Posts |
Posted - May 13 2020 : 16:52:38
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Ok, i will look at the help about setimage. but when i move a channel to the main imageenview and modify it, how do i know which channel i have modified, the red, blue or green?
I'll get back to you later on. Got to go now,
let me dig into the help first
Best |
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xequte
38176 Posts |
Posted - May 13 2020 : 17:13:12
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Sorry, I'm not following your workflow. Only you can know which channel is which. To ImageEn all the channels are just grayscale images.
Nigel
Xequte Software
www.imageen.com
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pierrotsc
USA
497 Posts |
Posted - May 13 2020 : 21:02:00
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nigel, let me modify your demo tomorrow with my code and you'll see what i am talking about. then you may have a better idea on how to handle it.
best
time to go to bed on the east coast :)
pierre |
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pierrotsc
USA
497 Posts |
Posted - May 14 2020 : 09:46:29
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Nigel, i have modified your demo. open an rgb image and look on the right at the imageenviewdest. click on each individual channel in the layermview component. Now i want to draw on the imageenviewdest component but i would like the RGB image (Layer 3-background) to get updated.
Best
attach/pierrotsc/20205149449_202051335024_RGBChannels.zip
5.88 KB |
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xequte
38176 Posts |
Posted - May 17 2020 : 04:15:50
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Hi Pierre
Then in the onchange event (delayed so as not to impede performance), call your GetRGBChannel code to update the content of your channel images.
Am I misunderstanding?
Nigel
Xequte Software
www.imageen.com
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pierrotsc
USA
497 Posts |
Posted - May 17 2020 : 08:48:01
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maybe, let me ponder on that. i do not see an onchange event, just an onimagechange. not sure about the delayed statement you mentioned too
best |
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pierrotsc
USA
497 Posts |
Posted - May 17 2020 : 09:23:36
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Ok, when you load my modified demo, you have 2 imaggenview. a source that has 4 layers (red, Blue, green and the RGB). the layermview is assign to the source. Each time you select a layer in the ielayermview, you are selecting either the R,G,B or RGB of the source and assign this layer to the imageenview destination. So the destination has one layer only. it can be a R,G,B or RGB image. I draw on the destination only.
How can i update the RGB layer from the source from the destination layer that has only one layer and you do not know which color is selected ?
Am i making myself clear?
Anyway, just reload my demo and change the mouseinteractgeneral to brushtool to the imageenviewdest. Then draw on it.
Best |
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yogiyang
India
725 Posts |
Posted - May 18 2020 : 00:39:46
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When you click on a layer it automatically get set as CurrentLayer so all that you need to do is update this CurrentLayer in Source from Destination after you have made any modifications to it.
HTH
Yogi Yang |
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pierrotsc
USA
497 Posts |
Posted - May 18 2020 : 12:14:39
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@yogiyang Thanks for the tip, i think i got it to work but not fully. When i draw on the iamgeenviewdest, it does not update right away. i have to draw again to see the first drawing updated.
I use
ImageEnViewSrc.CurrentLayer.Assign(ImageEnViewDest.CurrentLayer);
ImageEnViewSrc.Update;
Why is the update delayed?
Thanks |
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xequte
38176 Posts |
Posted - May 19 2020 : 15:51:06
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Hi
The update is delayed because at the time you assign the image the painting is still active and has not yet been applied to the image.
Use the on OnUserInteraction and if it's ieiPaintEnd then update ImageEnViewSrc.
https://www.imageen.com/help/TImageEnView.OnUserInteraction.html
OnImageChange should also work, but will get called more often than you need it.
Nigel
Xequte Software
www.imageen.com |
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pierrotsc
USA
497 Posts |
Posted - May 19 2020 : 16:18:03
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Thanks Nigel. It worked great. but i guess it would not work with procedure like brightness or contrast and so on.
What should i do when using image processing command.?
Best |
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