SlideShare is now on Android. 15 million presentations at your fingertips.  Get the app

×
  • Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
 

Working with camera and imaging on Nokia Asha software platform 1.0

by on Sep 24, 2013

  • 3,145 views

Your camera and imaging apps can do more than before with Nokia Asha software platform 1.0, because of new APIs and increased available memory. Imaging apps for the Nokia Asha 501 phone can take full ...

Your camera and imaging apps can do more than before with Nokia Asha software platform 1.0, because of new APIs and increased available memory. Imaging apps for the Nokia Asha 501 phone can take full advantage of its 3.2-megapixel camera, in part because of the phone’s support for memory cards of up to 32 GB, a Java™ heap of 3 MB, and a maximum JAR size of 5 MB. In this webinar, Java expert Michael Samarin of Futurice introduces new Nokia Asha software platform 1.0 APIs for image scaling and image processing. He reviews related Java APIs that were made available on the Series 40 platform. In coding demonstrations, he provides detailed guidelines for capturing and processing images.

Find out more about:
* developing for Nokia Asha at: http://www.developer.nokia.com/Develop/asha
* details on using advanced multimedia features in the Java Developer’s Library http://developer.nokia.com/Resources/Library/Java/#!developers-guides/multimedia/using-advanced-multimedia-features.html
* details on using the Image Scaling API in the Java Developer’s Library http://developer.nokia.com/Resources/Library/Java/#!developers-guides/ui-graphics-and-interaction/image-scaling-api.html

Check out the current webinar schedule here: http://www.developer.nokia.com/webinars or at http://developer.nokia.com/Develop/asha/learning/

Statistics

Views

Total Views
3,145
Views on SlideShare
3,145
Embed Views
0

Actions

Likes
0
Downloads
115
Comments
1

0 Embeds 0

No embeds

Accessibility

Upload Details

Uploaded via SlideShare as Adobe PDF

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel

11 of 1 previous next

  • CompassR CompassR Session 1, September 24, 2013 had technical difficulties and will probably not be posted. In the session 2 webinar of September 26, 2013, the question of barcode/QR code reading was posed by Karthik Subramaniyan. I offered the following: There was quite a discussion of reading barcodes (1D) and QR codes (2D) in Session 1 of this webinar. Angel Fernandez said that he had better luck with 2D than 1D surprisingly. Kevin sharp mentioned Nyquist as a limitation, and that only 2 or 3 pixels per barcode line made barcode reading untenable while some better results are possible for 2D (QR code) because it is designed to be read by a sensor, while 1D is designed to be read by 'flying dot'. Linear barcode 1D has about 110 elements while the image capture is 320 pixels; too tight to robustly capture, given only 2 or 3 pixels per element.

    I suggested possibly capturing a number of images and averaging them to overcome the 2-3 pixel/element limitation. Angel said this approach would not work because the barcodes are out of focus. The focal length of the camera is 50 cm to infinity, which is too far away for barcodes, which need less than 30 cm to fill image. http://www.google.es/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&ved=0CGkQFjAF&url=http%3A%2F%2Fwww.vs.inf.ethz.ch%2Fpubl%2Fpapers%2Fadelmanr_ubicomp06_demo.pdf&ei=GrZBUvmSH8WV7AarqoDwBQ&usg=AFQjCNE9ohiogj-vvylCvOvmKPKpWDgCVg&sig2=SpdtSFSkz5K26B0Zpf0yug&bvm=bv.52434380,d.ZGU was given by Angel, describing it as an old article that shows empirically some resukts from resolutuon trial-error 'methodology'. Kevin suggested http://en.wikipedia.org/wiki/Nyquist_rate as a reference to his Nyquist limitation comment. Angel said the above cited article showed In fact, Ron's idea is used 'somehow' in Aldemans article, needing 7 or 8 pixels per element. I looked at Aldeman article and noticed that his images were taken at an angle then analysed as multiple lines of pixels, which would give a much larger sample set for averaging than a single line across a barcode. In this case, the slight differences from line to line help to refine the relative position averages for barcode elements.
    6 months ago
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Working with camera and imaging on Nokia Asha software platform 1.0 Working with camera and imaging on Nokia Asha software platform 1.0 Presentation Transcript