An image processing session
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Transcript of An image processing session
![Page 1: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/1.jpg)
An image processing session
Skills: change view, rotate, select a portion of, crop, resize, change contrast, filter an image, undo an operation
IT concepts: pixel, image processing operation
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
![Page 2: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/2.jpg)
Image processing in context
• Internet concepts– Applications– Technology– Implications for
• Individuals• Organizations• Society
• Internet skills– Application development– Content creation
• Text• Images• Audio• Video
![Page 3: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/3.jpg)
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
Let’s apply these to an image.
![Page 4: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/4.jpg)
Start with a picture of Lucas
2,048 by 1,536 pixels (shown reduced to fit the slide)
![Page 5: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/5.jpg)
Zoom in to see pixels
Changing the view does not alter the image, just what you see while working on it.
![Page 6: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/6.jpg)
Operation: rotate
1,536 by 2,048 pixels (shown reduced to fit the slide)
![Page 7: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/7.jpg)
Operation: crop
357 by 381 pixel image (shown full size)
![Page 8: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/8.jpg)
Operation: increase contrast
![Page 9: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/9.jpg)
Operation: apply the “ink sketch” filter
This sort of thing took an overnight run in the era of batch processing.
Image processing programs have many such filters.
![Page 10: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/10.jpg)
Operation: resize
50 by 53 pixels
This could be used for an icon on a Web site or in a program.
![Page 11: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/11.jpg)
Operation: resize
200 by 213 pixels
I want to make a 200 by 200 pixel head shot to fit a Web site.
![Page 12: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/12.jpg)
Operation: crop
200 by 200 pixels
Ready to insert into head-shot space on the Web page.
![Page 13: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/13.jpg)
Try this for yourself
The original picture of lucas is at:
http://bpastudio.csudh.edu/fac/lpress/netApps/image/lucasoriginal.jpg
![Page 14: An image processing session](https://reader035.fdocuments.net/reader035/viewer/2022062314/56813141550346895d97bb91/html5/thumbnails/14.jpg)