1. View an image in Smath work sheet
"Insert Image" Doubleclick to create/edit or Right mouse button > Import or Specify matrix or specify file name.
An image from "Insert menu" is zoomed ~ 1.3 an undemanded zoom . Copy/paste from a display [IrfanView typical] does not zoom. If you don't want the imported zoom: "Reset to original size".
Inserting from the menu and reset to original size grants you of a place holder that has no more use than no use. In our example, "Biomorph" does not create or open the image matrix. What Smath does in there, it obtains from Windows the permission to display the image on Smath work sheet, as a dead object.
2. The basic Fourier "zoom pad"
1. The image is split/pitched in the 4 corners 2. cross padded of 0's 3. recovered from Fourier inversion.
3. "zoom pad" an RGB image
1. Fourier zoom pad is applied to each RGB component 2. The zoomed image is vectorised with a typical zoom light factor
Typical RGB light intensifier
4. "zoom smooth kernel"
This zoom belongs to the "Image ToolBox". The zoom results from oversampling, then smoothed by circular convolution.