tommy_mm

In Borland C++
I have copied an Image1 to an array tab[x][y], now i wnant to copy pixels from that array to Image2 using ScanLine.

I have used code:


int tab[256][256], *LinePtr;

void __fastcall TForm1::Button2Click(TObject *Sender)
{
for (int y=0; y<255; y++)
{
LinePtr = (BYTE *) Image2->Picture->Bitmap->ScanLine[y];
for (int x=0; x<255; x++)
{
LinePtr[x*3] = tab[x][y];
LinePtr[x*3+1] = tab[x][y];
LinePtr[x*3+2] = tab[x][y];
}
}
Image2->Refresh();
}

But the image I have received is gray. The original one was colorful.
How to use Scanline to receive original copied picture?

DaWei

You're putting the same pixel in three adjacent places. Presuming it's an RGB or BGR mapped image, that makes some shade of gray. Have a look at the forum's rules, please.

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tommy_mm

How should I change that??

DaWei

Hard to say, since I don't know the format you're using. It's obvious at a glance, however, that one doesn't just replicate a pixel 3 times unless one is enlarging the image in a very rough way. It also looks strange that you're varying x more rapidly than y, since x is the major dimension in the array.

This response is based entirely on your code (which is hard to read, since you didn't use code tags). You have explained your goal and your resources in only the most cursory way and I'm not familiar with the Borland compiler/toolset.

__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers