C / C++ / MFC

how to splice two big image

17-Sep-07 3:20

Move to the right position with 'seek' function fseek(...)/CFile::Seek(...)

then read 1 byte with fread(...)/CFile::Read(...)

Russell

King Tran17-Sep-07 2:28

17-Sep-07 2:28

i have two big 256 RGB images both are over 400M size, suppose we have known the GPS position of each vertexs of the two image, and the two images have same positions.

i want to splice the two images , make one new image including the two images.

is there good ways to process so big image?
thans.

Russell^'17-Sep-07 3:03

17-Sep-07 3:03

Lao Wang wrote:
is there good ways to process so big image?

the simplest one: pixel per pixel ...

i.e. do not use any build-in function, because they are surely not tested on very big images.

Russell

King Tran17-Sep-07 3:20

17-Sep-07 3:20

thanks Russell

but processing the two big image by pixel per pixel, consumes all my memory.

Russell^'17-Sep-07 3:23

17-Sep-07 3:23

are the images in BMP format?
can you work without load they into the memory i.e. loading/storing pixels from/into the files?

Russell

King Tran17-Sep-07 3:32

17-Sep-07 3:32

yes, the two images are BMP format.

would you please detail your suggestion? the images are .bmp file in my hard disk. how can i load the pixels from the file and process the pixels without loading them into memory?
thanks

Russell^'17-Sep-07 3:45

17-Sep-07 3:45

Lao Wang wrote:
yes, the two images are BMP format

great!!

Lao Wang wrote:
how can i load the pixels from the file and process the pixels without loading them into memory?

Here[^] or here[^] you can find how it is stored an image into a BMP file. i.e. how it is writed the file header.
Writing some lines of code you can load a pixel from the source image and then store into the output image...to let the processing be faster work row per row.
Probally you can find some code ready somewhere (also on CP) to access to the file.
good luck
Rose | [Rose]

Russell

King Tran17-Sep-07 14:08

17-Sep-07 14:08

thanks Russell, i will try it as your suggestion! Big Grin | :-D

Russell^'17-Sep-07 21:39

want to add picture in dialog box

17-Sep-07 21:39

good luck

Russell

Dhiraj kumar Saini17-Sep-07 0:50

Dhiraj kumar Saini

17-Sep-07 0:50

I want to add picture in mydialog box for wallpaper as is in the case of Webshots. Anyone tell me which control to use along with the code and functions.

Please help me.

Thanks In advance.

Dhiraj

Dhiraj Kumar Saini

Russell^'17-Sep-07 1:15

17-Sep-07 1:15

draw it during CDialog::OnEraseBkgnd

Russell

Programm3r17-Sep-07 1:15

Programm3r

17-Sep-07 1:15

Have a look at this site[^], just search for the dialog component on the window.

Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Hamid_RT17-Sep-07 2:00

17-Sep-07 2:00

Load your image with CImage class or LoadImage function and then use of WM_ERASEBKGND event.

Hamid_RT17-Sep-07 1:59

17-Sep-07 1:59

Does he need to search on the www.functionx.com while we have www.codeproject.com?;)

Dhiraj kumar Saini17-Sep-07 2:42

Dhiraj kumar Saini

17-Sep-07 2:42

its not clear can you just send me the code

Please and let me tell you i am using Picture Box control and it is mfc application and not win32.

Thanks

Dhiraj kumar Saini

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer17-Sep-07 5:27

17-Sep-07 5:27

As has been said, have a look in the dialog section here on codeproject - you'll find many articles on the subject. If browsing the website and looking at pictures on articles is too hard for you, then it's not fair to expect others to put in more effort.

Iain.

Hamid_RT18-Sep-07 2:48

18-Sep-07 2:48

If you are using a control like CStatic see this code

CImage m_Image;
m_Image.Load(yourimage);
m_Control.SetBitmap(m_Image.Detach());

Dhiraj kumar Saini18-Sep-07 3:24

Dhiraj kumar Saini

18-Sep-07 3:24

I am using MFC and not ATL so CImage is undeclared identifier.

Dhiraj

Hamid_RT18-Sep-07 19:35