Hallo Alex, I think there are two ways to achieve a calibration. First is a calibrated sensor connected via Bluetooth. The second is a samll scanning box in front of the camera where you include some known colors next to the scanning object. The camera measures both, the known colors and the object and the app could calculate correction values to calibrate itself. On the iPhone, you do not have the foll control and knowledge about the torch. Its strenght may change and you do not know the exact value. Additionally, one can not guarantee, that every torch on any device has axactly the same torch color.
Greetings Jan --- ColorVisor - The app to identify colors. Available on the App Store: http://itunes.com/app/ColorVisor --- Dr. Jan Blüher visorApps - Accessible apps for iPad & iPhone Bayreuther Str. 2 D-01187 Dresden Germany phone: +49 (0) 351 16053907 mobile: +49 (0) 176 34926242 e-mail: jan.blue...@visorapps.com web: http://visorApps.com Twitter: http://www.twitter.com/#visorApps Facebook: http://www.facebook.com/VisorApps tax number: DE281706766 Am 24.10.2012 um 17:10 schrieb Alex Hall <mehg...@gmail.com>: > Well, based on the calibration problems mentioned by the Digit-Eyes team, I > assumed some form of absolute lighting that the app knows and can filter > would be required. That's why I mentioned the flash; I figured a color > identifier would have you hold the phone within an inch or two of the object, > then flash the LEDs to give the image a lighting that the app could filter > out as it is always the same. I am hesitant to try more color identifiers, as > all the free ones I've tried on my iPod don't work reliably at all. Yet > another time when I wish Apple offered trials of apps... > On Oct 24, 2012, at 10:34 AM, "Jan Blüher, visorApps" > <jn.b...@googlemail.com> wrote: > >> Hallo Alex, >> >> of course, an iPhone app is not always as accurate as a specially designed >> and calibrated color detection device since it is simply not color >> calibrated. I guess, this is the reason why people at Digit Eyes withdraw >> from such a project. They couldn't get the accuracy they wanted. On the >> other hand, I compare the results of the ColorVisor with a color detection >> device I own and find them quite comparable. If you take into account that >> the app is much cheaper than a special device, this method is worth a try. >> There is also one big advantage in using the ColorVisor for color >> recognition: you can scan remote object such as the sky and liquids. >> Generally, you have to be more careful about lights and shadows when using >> an app. >> >> The ColorVisor also works well on the iPod and the iPad as far as you can >> control the surrounding light conditions or know how to deal with it. This >> may sound a bit strange for a blind person to achieve, but with some >> practise it is possible. Of course, you have more opportunities with a torch. >> >> I hope this answer gave you some impressions. We can extend the discussion >> if you like. >> >> Greetings >> >> Jan >> >> >> --- >> ColorVisor - The app to identify colors. >> Available on the App Store: >> http://itunes.com/app/ColorVisor >> --- >> Dr. Jan Blüher >> visorApps - Accessible apps for iPad & iPhone >> Bayreuther Str. 2 >> D-01187 Dresden >> Germany >> >> phone: +49 (0) 351 16053907 >> mobile: +49 (0) 176 34926242 >> e-mail: jan.blue...@visorapps.com >> web: http://visorApps.com >> Twitter: http://www.twitter.com/#visorApps >> Facebook: http://www.facebook.com/VisorApps >> >> tax number: DE281706766 >> >> >> >> >> >> Am 24.10.2012 um 15:17 schrieb Alex Hall <mehg...@gmail.com>: >> >>> Honestly, how well does this app work? I imagine you'd need an iPhone so >>> you can use the flash? I heard somewhere that the makers of Digit-Eyes were >>> looking into color identification, but they didn't finish it because it was >>> impossible to identify lighting conditions that could throw off the hew of >>> an object. I don't yet have an iPhone, but when I do I'd like to find a >>> good color identifier. As I said, I'm not even going to try it on my iPod, >>> as the camera on there is all but useless for anything more complex than >>> money identification. >>> On Oct 24, 2012, at 7:26 AM, "Jan Blüher, visorApps" >>> <jn.b...@googlemail.com> wrote: >>> >>>> Hallo MacVisionaries, >>>> >>>> as announced earlier today, a new version of the ColorVisor has been >>>> released. Version 2.0 is now available on the App Store and for update. >>>> There are a number of new features. Some of them are: >>>> >>>> * There is now a better color naming due to refreshed reference color >>>> palettes. >>>> * You can choose to identify only basic colors or differentiated color >>>> shades. >>>> * VoiceOver verbosity during the color scan is now configurable. By >>>> default, it does not announce color names during camera calibration >>>> processes. >>>> * Additionally, a sound is played when the camera is calibrating itself. >>>> This two things avoid the announcement of wrong color names during the >>>> calibration, which was a problem in former versions. >>>> * The CMYK color components were replaced by HSB. >>>> >>>> VoiceOver support is still unbroken and you can configure the ColorVisor >>>> to behave as in former Versions. >>>> >>>> The ColorVisor and even more details can be found on the App Store at >>>> http://iTunes.com/app/ColorVisor >>>> >>>> More information and a user manual are available on the ColorVisor support >>>> page at >>>> http://visorApps.com/ColorVisor/ >>>> >>>> >>>> If you have any questions, hints, or comments do not hesitate to contact >>>> me via this list, on my web site, or by using the new in-app support >>>> request. Any feedback is much appreciated. >>>> >>>> Greetings >>>> >>>> Jan >>>> >>>> >>>> --- >>>> ColorVisor - The app to identify colors. >>>> Available on the App Store: >>>> http://itunes.com/app/ColorVisor >>>> >>>> --- >>>> ColorVisor - The app to identify colors. >>>> Available on the App Store: >>>> http://itunes.com/app/ColorVisor >>>> --- >>>> Dr. Jan Blüher >>>> visorApps - Accessible apps for iPad & iPhone >>>> Bayreuther Str. 2 >>>> D-01187 Dresden >>>> Germany >>>> >>>> phone: +49 (0) 351 16053907 >>>> mobile: +49 (0) 176 34926242 >>>> e-mail: jan.blue...@visorapps.com >>>> web: http://visorApps.com >>>> Twitter: http://www.twitter.com/#visorApps >>>> Facebook: http://www.facebook.com/VisorApps >>>> >>>> tax number: DE281706766 >>>> >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "MacVisionaries" group. >>>> To post to this group, send email to macvisionaries@googlegroups.com. >>>> To unsubscribe from this group, send email to >>>> macvisionaries+unsubscr...@googlegroups.com. >>>> For more options, visit this group at >>>> http://groups.google.com/group/macvisionaries?hl=en. >>> >>> >>> >>> Have a great day, >>> Alex (msg sent from Mac Mini) >>> mehg...@gmail.com >>> >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "MacVisionaries" group. >>> To post to this group, send email to macvisionaries@googlegroups.com. >>> To unsubscribe from this group, send email to >>> macvisionaries+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/macvisionaries?hl=en. >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "MacVisionaries" group. >> To post to this group, send email to macvisionaries@googlegroups.com. >> To unsubscribe from this group, send email to >> macvisionaries+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/macvisionaries?hl=en. > > > > Have a great day, > Alex (msg sent from Mac Mini) > mehg...@gmail.com > > > > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To post to this group, send email to macvisionaries@googlegroups.com. > To unsubscribe from this group, send email to > macvisionaries+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/macvisionaries?hl=en. -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To post to this group, send email to macvisionaries@googlegroups.com. To unsubscribe from this group, send email to macvisionaries+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/macvisionaries?hl=en.
