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This is a repost from the MS GDI newsgroup.
Does anyone know why, in the following code, does the IsVisible() call return true?
Mark
Rect gdiText(507, 636, 6, 7);
Rect rctOne(512, 684, 20, 17);
Rect rctTwo(652, 220, 47, 9);
Region gdiRegion;
gdiRegion.MakeEmpty();
gdiRegion.Union(rctOne);
gdiRegion.Union(rctTwo);
gdiRegion.IsVisible(gdiText);
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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It doesn't, it returns false.
I cut/paste the above into a new project and it was fine.
...cmk
Save the whales - collect the whole set
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I was afraid of that. If you get a chance can you please check your gdiplus.dll version?
It doesn't work properly for me or the OP.
Thanks much!
Mark
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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I'm running Win2003 R2 x64.
From VS 2005 i created a new Win32 x86 project and pasted the code in the WM_PAINT case.
My gdiplus.dll's are:
C:\WIN\WinSxS\amd64_Microsoft.Windows.GdiPlus_6595b64144ccf1df_1.0.3790.1830_x-ww_56CDF238\GdiPlus.dll File Version: 5.2.3790.1830 (srv03_sp1_rtm.050324-1447)
and,
C:\WIN\WinSxS\x86_Microsoft.Windows.GdiPlus_6595b64144ccf1df_1.0.3790.1830_x-ww_24C40C58\GdiPlus.dll File Version: 5.2.3790.1830 (srv03_sp1_rtm.050324-1447)
...cmk
Save the whales - collect the whole set
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I was afraid of that too LOL
Mine is XPSP2 gdiplus.dll is 5.1.3102.2180
Where is the mythical GDI+ 1.1 ...
Thank you!
Mark
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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Hello Gentlemen!
I am working on a project in vb.net. The application will color any grayscaled picture in its actual colors. The problem is big!
All I need is an accurate advise or direction how to setup an algorithm to find the exact colors of the picture.
It seems to me that I have to find the color of each pixel first and then what? Is there any matrix about the colors what reflects a paralelism between graysacaled color set to others.
Any advise would be helpful..
Thank You!
What a curious mind needs to discover knowledge is noting else than a pin-hole.
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I don't think you can get exact colors from a grayscale image.
Have you searched for "colorize algorithm"?
Mark
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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JUNEYT wrote: All I need is an accurate advise or direction how to setup an algorithm to find the exact colors of the picture.
there is no way to find the "exact color" of pixel from panchromatic (greyscale). The primary issue is that panchromatic is usually luminance which follows a ration of RGB light there will usually be more than 1 color value triplet to match each pancromatic pixel.
you are trying to reverse this formula: RGB Luminance value = 0.3 R + 0.59 G + 0.11 B
so if the luminance value is say 255 (bright white luminance) what is the values of R G and B? If you know the most prominant color, a color reference, then you can figure out from the ratios the others involved.
Colorizing Panchromatic from low-resolution color reference[^]
_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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Damn! I wanted to read that pdf but it froze while loading
I'll try later. Thanks for the link!
Mark
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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Mark Salsbery wrote: Damn! I wanted to read that pdf but it froze while loading
http://www.google.com/search?hl=en&q=panchromatic+colorizing[^] there's always fun reading there. If you have my same idea of fun.
_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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Gracias!
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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You are very welcome. Always willing to encourage the image processing addiction... you'll hate me later.
_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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It's way too late. My first computer job that's what I did.
The challenge lately has been to not get sucked into it, for the time being
Hopefully soon I'll have someone to do my UI programming so I can get back to the fun stuff!
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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Thanks you very much Jeffry.
I was intending to pull my sleves and jump into coding but when I examined the sophisticated algorithm behind it, I decided to roll back my sleves...
Thanks a lot!
What a curious mind needs to discover knowledge is noting else than a pin-hole.
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JUNEYT wrote: but when I examined the sophisticated algorithm behind it
It is the stuff that master's thesises are written about. I know of about four. none of them mine, sorry. Though my work was turned into a master's thesis, it just wasn't for me, someone used my work to get theirs.
_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)
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I am programming a small drawing application.
And what I do is rubber band a red circle and draw in black (eventually any color but red). And my program draws designs inside of the circle, and then when the user is done, the user can make a new circle. And I want the circle to erase itself and not the designs it may encounter in the rubber banding. I would like to know how to just erase the circle.
This means I am asking a general mixed mode involving the SetROP2 function in the Windows GDI. Is there a way to draw on a client window and erase only the pen color? (Erase means make it white.)
Andrew Katz
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This has nothing to do with ROP, just draw the circle based on a Boolean flag and when the flag changes issue a command to redraw the area that contained the circle.
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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Can I select a DIB into a memory Device Context?
If yes, then how?
B2C
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No.
The docs for SelectObject[^] explain what can be selected into a DC.
But, you can select a DIBSection into a mem DC. See CreateDIBSection[^]
or you can create a DDB from a DIB with CreateDIBitmap[^]
Mark
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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Sorry, wrong! Unless you know something I do not.
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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Are you sure you're not mixing up DDBs and DIBs? If so how does one select a DIB into a
device context?
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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I apologize; at one time I was so used to dealing with raw DIBs that I forgot that they needed to be converted to a GDI DIB via CreateDIBSection, which converts a raw DIB to a DIB that the GDI recognizes, before it could be selected into a DC.
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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No apology necessary for sure. I wonder what happened to the OP?
Cheers!
Mark
"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")
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They often disappear after the original post. Some times they come back and say thanks and other times they just continue on with their lives, with a little more information.
I have been guilty of both!
P.S. I have been known to disappear for weeks!
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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Yes! A dib is just a bitmap and if your program can load it you can display it. The problems occur when it is not a dib (essentially a “.bmp”), in which case you will need to convert it using code like “CxImage” (at CP).
See LoadImage (MSDN).
INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra
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