Image Resolution for Projection

					Image Resolution for
    Projection


        Steve Weeks, DDS
     UIC College of Dentistry
    Department of Endodontics
72 dpi / 17 K bmp / 3 K jpg




     Source Image: 35 mm slide; 1.3” x 0.9” scanned
150 dpi / 75 K bmp / 10 K jpg




     Source Image: 35 mm slide; 1.3” x 0.9” scanned
300 dpi / 302 K bmp / 33 K jpg




     Source Image: 35 mm slide; 1.3” x 0.9” scanned
600 dpi / 1170 K bmp / 105 K jpg




    Source Image: 35 mm slide; 1.3” x 0.9” scanned
1200 dpi / 4710 K bmp / 280 K jpg




    Source Image: 35 mm slide; 1.3” x 0.9” scanned
2400 dpi / 18850 K bmp / 739 K jpg




    Source Image: 35 mm slide; 1.3” x 0.9” scanned
300 dpi   600 dpi
600 dpi   1200 dpi
1200 dpi   2400 dpi
600 dpi   2400 dpi
300 dpi   2400 dpi




600 dpi   1200 dpi
          Conclusion:
For 1.3” x 0.88” color image to be
 enlarged and projected,
600 to 1200 dpi as .jpg gives best resolution
 for file size

PPT presentation with .bmp images is
 approximately 2.25 times larger file than
 same presentation with .jpg (informal)
What about cropping?
72 dpi / 111 B bmp / 1 K jpg




    Source Image: 35 mm slide; 0.08” x 0.09” scanned
150 dpi / 485 B bmp / 1 K jpg




    Source Image: 35 mm slide; 0.08” x 0.09” scanned
300 dpi / 2 K bmp / 1 K jpg




     Source Image: 35 mm slide; 0.08” x 0.09” scanned
600 dpi / 8 K bmp / 2 K jpg




     Source Image: 35 mm slide; 0.08” x 0.09” scanned
1200 dpi / 30 K bmp / 3 K jpg




    Source Image: 35 mm slide; 0.08” x 0.09” scanned
2400 dpi / 121 K bmp / 7 K jpg




    Source Image: 35 mm slide; 0.08” x 0.09” scanned
          Conclusion:
For small sections of an image to be
 enlarged,
The highest possible resolution is desirable

Limitations on image clarity may exist

				
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