1. Skills: rotate, select, crop, resize, change contrast, filter, compress Concepts: image processing operation, information This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. An image processing session

2. Where does this topic fit? Internet concepts – Applications – Technology – Implications Internet skills – Application development – Content creation (image) – User skills

3. Selected image processing operations Rotate an image Crop an image Change image contrast Apply a filter to an image Resize an image Select a portion of an image

4. Start with a picture of Lucas 2,048 by 1,536 pixels (zoom out to fit laptop screen)

5. Operation: rotate

6. Operation: crop 357 by 381 pixel image (shown full size)

7. Operation: adjust contrast

8. Operation: apply the “ink sketch” filter

9. Operation: resize 200 by 213 pixels

10. Operation: crop 200 by 200 pixels

11. Tool option and status areas

12. 15.3 kilobytes 40.2 kilobytes Operation: compress

13. Image processing work flow Capture Edit Compress Distribute

14. Try this for yourself The original picture of Lucas is at: http://som.csudh.edu/fac/lpress/netApps/image/lucasoriginal.jpg

15. Zooming versus resizing 2,048 by 1,536 pixels (3 megapixels) 1,920 by 1,200 pixels

16. Summary

17. Resources Tutorials: http://www.getpaint.net/doc/latest/index.html Download, forums, blog and email contact: http://www.getpaint.net/doc/latest/WebLinks.html

18. 1.We illustrated several image processing operations in this presentation. Without looking back, do you recall what they were? 2.Can you describe what each does to an image? 3.Can you think of any other image processing operations that we did not use in this presentation? 4.If one zooms in on an image is information lost or gained? 5.If one resizes an image, making it smaller, is information lost? 6.If one resizes an image, making it larger, is information gained? 7.If one crops an image, is information lost? 8.If one filters an image, is information lost? 9.If one compresses an image, is information lost? 10.If one zooms in on an image, which of its characteristics are changed? 11.If one resizes an image, which of its characteristics are changed? 12.If one crops and image, which of its characteristics are changed? 13.If one filters an image, which of its characteristics are changed? 14.If one rotates an image, which of its characteristics are changed? 15.If one compresses an image, which of its characteristics are changed? Self-study questions