An image processing session Skills: change view, rotate, select a portion of, crop, resize, change contrast, filter an image, undo an operation IT concepts:

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Presentation transcript:

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.

Image processing in context Internet concepts –Applications –Technology –Implications for Individuals Organizations Society Internet skills –Application development –Content creation Text Images Audio Video

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.

Start with a picture of Lucas 2,048 by 1,536 pixels (shown reduced to fit the slide)

Zoom in to see pixels Changing the view does not alter the image, just what you see while working on it.

Operation: rotate 1,536 by 2,048 pixels (shown reduced to fit the slide)

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

Operation: increase contrast

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.

Operation: resize 50 by 53 pixels This could be used for an icon on a Web site or in a program.

Operation: resize 200 by 213 pixels I want to make a 200 by 200 pixel head shot to fit a Web site.

Operation: crop 200 by 200 pixels Ready to insert into head-shot space on the Web page.

Try this for yourself The original picture of lucas is at: