3. AsPyLib.astro : the main module

• 3.1 First steps
  • Display an image
  • Display the difference between two images
  • Print statistics of an image list
  • Print image information, with more elaborated image list
• 3.2 How to save a modified image ?
  • Simple example
• 3.3 Manipulating image data
  • Images as Numpy arrays
  • Images and image lists
  • Accessing image pixels (indexing) or subimages (slicing)
  • Naming convention : what are X and Y directions ?
• 3.4 Geometrical transformations
  • Simple script
  • Available transformations
  • Mirror symmetries, 90 deg rotation
  • Pixel interpolation
  • Translations
  • Rotations
  • Scaling
  • Effect of computer screen with rectangular pixels
• 3.5 Selecting objects
  • Simple example
  • Markers
  • Selecting an unspecified number of objects
• 3.6 Fitting stars
  • Simple script for stars fitting
  • Circular gaussian PSF
  • Elliptical gaussian PSF
  • Circular moffat PSF
  • Elliptical moffat PSF