ImageThumbNail

Arguments

Returns

An image on success, otherwise nil.

Description

This function reduces or enlarges an image to the height and width specified. Although both height and width must be specified, ImageThumbNail always reduces or enlarges proportionally, using the smaller of two size parameters.

To use this function, you must load the ImageProc.lsp library with a call to require_lisp("ImageProc.lsp").

Example

This example, ex_ImageThumbNail.g, is included in the product distribution.

#!/usr/cogent/bin/phgamma

/*
This example puts up a window with a label image.  (Size: 96 by 96
pixels). Next to this image is the same image reduced by 1/4 and 3/4.
In the second reduction, arguments were passed for a dispropotional
result, but ImageThumbNail() chooses the smaller of the two.
*/

PtInit(nil);
require_lisp("PhotonWidgets.lsp");
require_lisp("ImageProc.lsp");

win = new(PtWindow);
win.SetDim(250,200);

img = PxLoadImage("smiley.bmp");
lab = ImageToLabel(img);
lab.SetPos(25,25);

imgt1 = (ImageThumbNail(img,24,24));
labelt1 = ImageToLabel(imgt1);
labelt1.SetPos(150,25);

imgt2 = (ImageThumbNail(img,72,200));
labelt2 = ImageToLabel(imgt2);
labelt2.SetPos(150,80);

PtRealizeWidget(win);
PtMainLoop();

See Also

PxReduceImage