JPEG Image Quality and File Size

I pride myself in producing high quality photographs. It is difficult to represent the quality of a fine printed image, on a monitor. Each image has to be checked on different monitors, and different platforms and browsers, modified until the proper affect is reached.

Here I am testing a photograph of Stadium High School in Tacoma Washington, to see how compressed I can get the file without losing image quality. All 4 shots have become become somewhat blurry, when compared to the same images viewed without a browser. But the real surprise is how similar the results are. I see very little difference between them, until you look at the load times. The MAXIMUM QUALITY IMAGE TAKES 32.12 SECONDS to load on a 14.4 modem, while the LOWEST QUALITY IMAGE TAKES 5.46 SECONDS to load on a 14.4 modem. Using the quicker image would mean the difference between keeping and losing a visitor.

For more information I highly recommend "Designing Web Graphics .2" by Lynda Weinman, a highly valuable resource.


Maximum quality, compression 1:4 46.4K --- High quality compression 1:7, 29K
Maximum High

Mediun lowest
Medium quality, compression 1:11 17.6K --- Lowest quality, compression 1:27, 7.4K

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