cool.. kapan masuk market ya? On Tue, Sep 21, 2010 at 7:24 AM, Agus Hamonangan <[email protected]>wrote:
> http://goo.gl/xF98 > > Those who are environmentally conscious can now download an app to > monitor air quality thanks to the work of multiple University of > Southern California (USC) researchers. > > The app, named Visibility, works quite simply according to Gaurav > Sukhatme, computer science professor and the head researcher behind > its development. All the user has to do is take picture of the sky > while the sun is shining. This photo can then be compared to > established models of sky luminance to estimate visibility. According > to Sukhatme, visibility is related to the concentration of harmful > "haze aerosols." These tiny particles collect from dust, engine > exhaust, mining or other sources in the air. > > Sukhatme, who worked extensively with Sameera Poduri, a postdoctoral > researcher at USC's Viterbi School of Engineering, designed the app > for the Android platform. He said it hopes many people download it, > which would allow them to improve the software. > > "We're sure we can improve it if we get people trying it and testing > it and sending data," Sukhatme said in a statement > > The reason the app works is because modern smartphones uses a set of > sensors that include cameras, GPS systems, compasses and > accelerometers. The accelerometer in the phone determines how the user > is holding the phone, determining whether it displays information > vertically or horizontally. This ultimately ensures the user will hold > it in the right direction. > > According to the researchers, getting the right image is critical in > the success of getting this app to work. The human element is > essential they say. The user must make sure the picture is of the sky. > > "Several computer vision problems that are extremely challenging to > automate are trivially solved by a human. In our system, segmenting > sky pixels in an arbitrary image is one such problem. When the user > captures an image, we ask him [or her] to select a part of the image > that is sky," it says in their report. > > While the accelerometers and the compass capture the image three > dimensionally, a phone's GPS captures the date and time. This allows > the app to find out the position of sun when the photo was taken. Once > the image is taken, it's uploaded automatically to a central computer, > where the data is analyzed. > > The duo has already tested it in several locations. > > -- > Salam, > > > Agus Hamonangan > > http://groups.google.com/group/id-android > http://groups.google.com/group/id-gtug > Gtalk : id.android > Follow : @agushamonangan > E-mail : [email protected] > > -- > "Indonesian Android Community [id-android]" > > Join: http://groups.google.com/group/id-android/subscribe?hl=en-GB > Moderator: [email protected] > Peraturan Jual dan Kloteran ID-Android http://goo.gl/azW7 > ID Android Developer: http://groups.google.com/group/id-android-dev > ID Android Surabaya: http://groups.google.com/group/id-android-sby > ID Android on FB: http://www.facebook.com/group.php?gid=112207700729 > -- Karim blog: http://turbodance.blogspot.com -- "Indonesian Android Community [id-android]" Join: http://groups.google.com/group/id-android/subscribe?hl=en-GB Moderator: [email protected] Peraturan Jual dan Kloteran ID-Android http://goo.gl/azW7 ID Android Developer: http://groups.google.com/group/id-android-dev ID Android Surabaya: http://groups.google.com/group/id-android-sby ID Android on FB: http://www.facebook.com/group.php?gid=112207700729
