User manual

Convolution

Furthermore, the menu “Image => Convolution …” lets you “convolve” the current image

with a specific array, i.e. to compute a new image according to the product of each pixel

from the original image (and their neighbours) with a specific array. The sub-menu gives

the array usually used in astronomy (Gauss, Mex, TopHat…) with different sizes. You

can also define you own convolution matrix by using the script command: “conv” (see

Erreur : source de la référence non trouvée). The resulting image will replace the

original one in the stack. If you wish to keep the original image, you need to duplicate it

beforehand (menu: “Image => Duplicate the image plane”)

5.13Save, export and print

Icon:

Menu: File => Save…, File => Export…

File => Backup…, File => Print…

Short key: Ctrl +S, Ctrl +P

By using the icon on the top left corner, below the menu band, representing a floppy

disk, you can open the save and

export window. You an also use the

different possibilities from the “file”

menu to get directly the desired

action.

Aladin has several possibilities to save your work:

 Printing the view(s);

 Save the current view. The

supported formats are BMP,

JPEG, PNG and EPS. This

last format is especially

preferred for a scientific

publication;

 Backup the stack and views

for a further use;

 Exporting one or several

planes in the stack. The

images will be exported in

FITS or JPEG (for colour

images), catalogues in TSV

(Tab-Separated-Value) or

VOTable (see 8.2);

 Access to URL that gave the

images and catalogues.