Saturday, May 29, 2010

Understanding Image Histograms

how to Understand image histograms
Understanding image histograms is probably the single most important
concept to become familiar with when working with pictures from a digital
Example Histogram


region where most of the brightness values are present is called
the "tonal range." 
image is an example which contains a very broad tonal range,
with markers to illustrate where regions in the scene map to
brightness levels on the histogram


Low Key Imege
Low Key Histogram
High Key Image
High Key Histogram
Low Key Histogram
High Key Histogram
underexposure is usually more forgiving than
overexposure (although this compromises your
signal to noise ratio).  Detail can never be recovered when a region
becomes so overexposed
The histogram is a good tool for knowing whether clipping has
occurred since you can readily see when the highlights are pushed


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Sunday, May 23, 2010

The most beautiful lakes in the world

Lake McKenzie in Australia. Situated on Frazer Island, the largest sand island in the world, the water is naturally filtered by the sand before it settles in the lake
Lake Louise in Canada.
Lake Como in Italy.
Lake Bled in Slovenia
Lake Atitlan in Guatemala. Stop and admire the volcanoes from San Marcos
Lake Titicaca in Bolivia/Peru.
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Friday, May 14, 2010

ensure your router's safety

clipped from

  1. Change the default password to a secure password.

  2. Disable Remote Web Administration.

  3. Disable Wireless Administration so that an ethernet connection is required to access the device console.

  4. Update your router's firmware. Make a note of the version and date; check your router periodically to ensure it hasn't been changed. If a change is discovered, visit your router vendor's website and install a new firmware update (be sure to reboot the router afterwards).

Home and SOHO users will find more helpful router tips in Bradley Mitchell's Tips for Maintaining Wireless Home Networks.

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Wednesday, May 12, 2010

Premier League Team of the Season 2009-10

clipped from
GK: Joe Hart (Birmingham City)
just past Pepe Reina
as Edwin van der Sar, Mark Schwarzer and Brad Friedel.
RB: Branislav Ivanovic (Chelsea)
CB: Richard Dunne (Aston Villa)
CB: Michael Dawson (Tottenham Hotspur)
LB: Patrice Evra (Manchester United)
RW: Craig Bellamy (Manchester City)
CM: Frank Lampard (Chelsea)
CM: Cesc Fabregas (Arsenal)
LW: Florent Malouda (Chelsea)
provided boundless energy, strength and skill, as well as a healthy tally of goals and assists.
more dazzling but also more fleeting Luka Modric and Gareth Bale.
ST: Didier Drogba (Chelsea)
ST: Wayne Rooney (Manchester United)
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Thursday, May 6, 2010

when to take HDR photo?

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You’re reading this article because you want to learn more about high-dynamic-range photography. Cool. HDR photography rocks.
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