The VXL Project

Soumya P wrote:
> Hi Ian,
> 	Thanks for the reply. 
> Now i have another problem... I need to open a Dicom image in 3D...
> Dicom 2D image is being opened smoothly...
> But when it comes to 3D its not working
> 
> i am using vil3d_load to open 3D image

How do you mean not working? Please be specific. Details of the dicom 
image are also useful.

One issue - if you have one of the newer single file 3D dicom images 
(rather  than the more usual list of 2D slice files), then vil3d doesn't 
support that yet. Patches to vil3d are most welcome.

> 
> Also how do i open raw image using VXL?

You can load the data into memory, and then wrap a vil_image_view<> 
around it with the appropriate type, sizes and step lengths.



Ian.

Soumya P wrote:
> What i tried to do with raw image is 
> spBaseImageraw = vil_load_image_resource_raw(pFileName);
> but this is returning a null pointer......

This function name is slightly misleading. It does not load images from 
the RAW file format.


> how do i specify the type and size length to open the raw image...
You don't

See my previous email and  the vil_image_view constructor described at 
http://paine.wiau.man.ac.uk/pub/doc_vxl/core/vil/html/classvil__image__view.html#vil__image__viewa2.

Ian.

I used this code snippet and tried to open raw image. but it did not
work out..
is there any other way to open raw image?
		 vxl_byte image[50*50];
			 vil_image_view_base* img =3D new
vil_image_view<vxl_byte>(image,50,50,1,1,1,1);
		=09
			 vil_image_view_base_sptr im_view(img);
=09
im_resource_plugin.load_the_image(im_view,pFileName);
			 this->im =3D
vil_new_image_resource(im_view->ni(),im_view->nj(),
=20
im_view->nplanes(),im_view->pixel_format());
			this->im->put_view((const
vil_image_view_base&)*im_view,0,0);

-----Original Message-----
From: Ian Scott [mailto:ian.m.scott@...]
Sent: Tuesday, November 08, 2005 6:38 PM
To: Soumya P
Cc: Vxl-Users
Subject: Re: [Vxl-users] Regarding vil_save


Soumya P wrote:
> What i tried to do with raw image is=20
> spBaseImageraw =3D vil_load_image_resource_raw(pFileName);
> but this is returning a null pointer......

This function name is slightly misleading. It does not load images from=20
the RAW file format.


> how do i specify the type and size length to open the raw image...
You don't

See my previous email and  the vil_image_view constructor described at=20
http://paine.wiau.man.ac.uk/pub/doc_vxl/core/vil/html/classvil__image__vi=
ew.h
tml#vil__image__viewa2.

Ian.

Soumya P wrote:
> 	I used this code snippet and tried to open raw image. but it did not
> work out..
> is there any other way to open raw image?

I take it that you have read
http://paine.wiau.man.ac.uk/pub/doc_vxl/core/vil/html/classvil__image__view.html
http://paine.wiau.man.ac.uk/pub/doc_vxl/core/vil/html/index.html
and
http://paine.wiau.man.ac.uk/pub/doc_vxl/books/core/book_7.html#SEC63


#include <vcl_fstream.h>
#include <vxl_config.h>

int main()
{
   vxl_byte * image_data = new vxl_byte[50*50];

// vil provides no system for handling RAW file format.
// fill image_data with raw data yourself
   { vcl_ifstream file("filename.raw",vcl_ios_binary);
     file.read(reinterpret_cast<char *>(image_data), 50*50);
   }
//Read up on what istep and jstep do.
//Warp a vil_image_view around image_data
//Assume that the data is organised raster-wise
   vil_image_view<vxl_byte> image(image_data,50,50,1,50,1,1);

//Thats it.
//image is now a view onto your image_data.
//so.
   vcl_cout << image(24,24);
// will print a pixel next to the middle of the image.


   delete image_data[];
   return 0;
}


There is no reason to use any image_resource, vil_image_view_base or 
vil_image_view_base_sptr stuff. These are all advanced things for 
solving specific problems. Randomly using such functions and classes is 
unlikely to work.

Ian.

 > -----Original Message-----
 > From: Ian Scott [mailto:ian.m.scott@...]
 > Sent: Tuesday, November 08, 2005 6:38 PM
 > To: Soumya P
 > Cc: Vxl-Users
 > Subject: Re: [Vxl-users] Regarding vil_save
 >
 >
 > Soumya P wrote:
 >
 >>What i tried to do with raw image is
 >>spBaseImageraw = vil_load_image_resource_raw(pFileName);
 >>but this is returning a null pointer......
 >
 >
 > This function name is slightly misleading. It does not load images from
 > the RAW file format.
 >
 >
 >
 >>how do i specify the type and size length to open the raw image...
 >
 > You don't
 >
 > See my previous email and  the vil_image_view constructor described at
 > 
http://paine.wiau.man.ac.uk/pub/doc_vxl/core/vil/html/classvil__image__view.h
 > tml#vil__image__viewa2.
 >
 > Ian.
 >