Spatial Resolution / Image Composing I

Building the Cantata Workspace

The image ruler.viff has dimensions: 512 pixels in width and 14 pixels in height:

The file moon.viff is a 512 x 512 image.

1. Build a ruler of width 100 applying the operator Extract on the image ruler.viff. As the extraction is done only in the width dimension, you do not need to select the other dimensions.
2. Insert the 100-width ruler image in the moon image at the desired coordinate using the operator Inset. You can simultaneously display the moon image and use the mouse to point to the desired position to read the coordinate.
3. Build the lower resolution image using the operator Resample with a Width and Height magnification factors of 0.5. The image will be reduced to half its dimensions in both width and height directions.
4. Insert the ruler image in the reduced moon image at the desired coordinate.

Exercises

• Experiment with the Resample operator to generate images with different resolutions.