1、CODE FACTORY, S.L. - Rambla dEgara, 148 2 2 - 08221 Terrassa (Barcelona) - SPAIN Tel: +34 93 733 70 66 - Fax: +34 93 789 30 51 www.codefactory.esUSER MANUAL MOBILE COLOUR RECOGNIZERINTRODUCTIONMobile Colour Recognizer and light detector (MCR) is a unique software application which was developed to w
2、ork with Mobile Speak and Mobile Accessibility. It can be installed in camera phones (currently it works with all Symbian series 60 phones). MCR can be used to determine the color or different colors of an object by taking a picture of the object. MCR also can be used to measure the level of light.
3、MCR offers several options so that users can configure the program according to their needs e.g. adapt to the local light conditions, select a zoom level, speak the level of confidence. MCR is very easy to install onto the phone.To get optimal results you should carefully read this documentation and
4、 follow the different steps. This is necessary to obtain the most accurate and reliable results from the MCR. In the last section of this document, titled “Important”, you will find additional hints on how to get the best results with the software.Some unique features of the MCR are:- Calibration so
5、 that very accurate results can be achieved in a wide range of lighting conditions- Different Zoom levels- Multiple Colour testing- Location of the different colours is announced- Light Detector- Set user preferencesHOW TO USE THE MOBILE COLOUR RECOGNIZERThe functions of the MCR are accessed by pres
6、sing the following keys.Measure Colour - Enter KeyThis will speak the colour of the object which is in the cameras view. Point the camera at the object that you wish to measure the colour of, press the Enter key, and then hold the camera steady until the colour is spoken. This should only take a cou
7、ple of seconds in normal or bright lighting conditions, but may take up to 10-12 seconds in low light conditions. There are 11 different colours that the MCR can recognise: White, Black, Gray, Red, Pink, Orange, Brown, Yellow, Green, Blue and Purple. In addition, for all of these CODE FACTORY, S.L.
8、- Rambla dEgara, 148 2 2 - 08221 Terrassa (Barcelona) - SPAIN Tel: +34 93 733 70 66 - Fax: +34 93 789 30 51 www.codefactory.es(except White and Black), the MCR will determine whether the colour is light, dark or normal. If the object has a colour which is a mixture of two colours, they will both be
9、spoken (e.g. “Green Blue” for an object that has an aqua colour, or “Gray Pink” for a pink object that has a washed out appearance and has low saturation). The phones camera is sensitive to the current lighting conditions, so it is important that the MCR is properly calibrated to the current lightin
10、g conditions in order to achieve the most accurate results. See the section on Calibration for more information about this. In addition to speaking the colour, the MCR will also speak the Confidence Level, the Location, and Multiple Colours if the user has set these preferences. These are described
11、in detail below.Calibrate - Clear KeyIn order to obtain the most accurate results, it is important to calibrate the MCR to the current lighting conditions. This is done by placing a white object (e.g. a sheet of paper) in a similar place to the object you wish to measure the colour of. If it is not
12、possible to place the white paper near the object you wish to measure the colour of (e.g. measuring the colour of something in the distance), then place it in a location that has similar lighting conditions to the object you are measuring. Point the camera at the white object and press the Calibrate
13、 key. Hold the phone steady until you hear the response “Calibration Complete”. This should take just a couple of seconds in normal or bright lighting conditions, but may take up to 10 seconds if the lighting conditions are low. The MCR is now adapted to the current lighting conditions and ready to
14、measure. To confirm that the current calibration has been accurate, it is suggested to measure the colour of the white object that you used to calibrate immediately after the calibration is completed (without moving the camera). If the reported colour is not White or Light Gray, then there may have
15、been a problem with the calibration (e.g. the phone moved, or the camera was not directed very well at the white object, or there was a shadow across the white object which prevented proper calibration). In this case, reconfirm that the camera is facing the white object correctly (maybe increase the
16、 Zoom Level to between 3 and 5 to focus more closely on the centre of the camera focus area), and if possible, check that the white object is not being placed in a shadow (either by the phone itself, the user or another object) and calibrate again. It is also best to perform measurements in normal o
17、r bright lighting conditions, so if it is possible, turn on the lights so that the object you wish to measure is well illuminated. Once you become familiar with this calibration process, it will be become very straightforward (it just requires a button click and few seconds wait), and you will be ab
18、le to achieve the most accurate results.Once calibration is complete, the MCR is ready to measure and will use these calibration parameters to calculate the colour of the objects that are CODE FACTORY, S.L. - Rambla dEgara, 148 2 2 - 08221 Terrassa (Barcelona) - SPAIN Tel: +34 93 733 70 66 - Fax: +3
19、4 93 789 30 51 www.codefactory.esmeasured. The currently loaded calibration parameters will be saved when the program exits, and will be reloaded when the program restarts. If you wish to save the current calibration (e.g. if these lighting conditions are stable and you wish to make more measurement
20、s in these conditions in the future), you can save it as one of your User Calibrations (see below). Measure Light Level Key 0As well as measuring the colour of objects, the MCR can also be used to measure the current light level. Point the camera towards a light coloured object (e.g. sky, ceiling; i
21、n general, pointing the camera upwards should point towards a light coloured object). It doesnt need to be white, but it should be light coloured. Within a couple of seconds, you will hear the current light level spoken. Four levels are possible: Bright, Normal, Dim and Dark. Note that if the level
22、is Dark, colour measurements will probably not be possible (because the light level is too low and everything will be classified as Black). If the light is currently Dim, there may be reduced accuracy when a colour measurement is performed, so turn on the lights or move the object to an area with be
23、tter lighting if you wish the make a colour measurement. However even in Dim lighting conditions, the MCR will measure the colour in the most accurate manner possible.Note that the measurement of Light Level does not depend upon the current calibration, so there is no need to calibrate before doing
24、this measurement.Increase or Decrease Camera Zoom Up and Down KeysThe MCR has five levels of Camera Zoom (Zoom Level 1 Zoom Level 5). By pressing the Up or Down key, the Zoom Level will change and the user will receive confirmation of the current level. By increasing the Zoom Level, the area used wh
25、en measuring colour or calibrating is more closely focused on the central area in front of the camera. This means that, at Zoom Level 5, only the area in the very centre of the picture is used in the colour measurement. However, at Zoom Level 1, the whole picture is used. Since the camera on most ph
26、ones is relatively wide-angle, using the whole picture (i.e. using Zoom Level 1) may capture objects which are beside the object you are really interested in measuring, so it may be preferable to use a higher Zoom Level in this case (e.g. Zoom Level 3 or 4). Once the user becomes familiar with the M
27、CR and and phones camera, the Zoom Level can be particularly useful. For example, if the object that is being measured is in the distance, you may wish to increase the Zoom Level so that the area of the image that will be used to perform the calculation is more closely focused on the object of inter
28、est. This of course assumes that the user is familiar with the exact location of the phones camera and is used to pointing the camera accurately in the direction of the object something CODE FACTORY, S.L. - Rambla dEgara, 148 2 2 - 08221 Terrassa (Barcelona) - SPAIN Tel: +34 93 733 70 66 - Fax: +34
29、93 789 30 51 www.codefactory.esthat will also be mastered with practice. The user may wish to take colour measurements at different Zoom Levels as it will help to build up a better idea of the composition of the object being measured. This can be extremely useful when used in conjunction with the Mu
30、lti Colour and Location features. For example, if you first take a colour measurement with Zoom Level 5 and hold the camera steady, you can then decrease the Zoom Level and take another measurement. Repeat this at all Zoom Levels if you wish, keeping the camera steady. With Multi Colour and location
31、 features turned on, this will help to build up a better idea of the colour content of the object at different zoom scales.Note that the currently loaded Zoom Level will be saved when the program exits, and will be reloaded when the program restarts. The first time that the MCR is used, it is set to
32、 Zoom Level 3.Store and Recall User Calibrations Key 1, Key 2 and Key 3The MCR allows the user to save and recall up to three different calibration settings. Therefore, if they are regularly in the same place and in the same lighting conditions, they can store the calibration and will not need to re
33、calibrate with the white piece of paper. To save the current calibration, perform a long keypress (longer than 1 second) on either of the three User Calibration storage locations (i.e. Key 1, Key 2 or Key 3). When the key is released, you will hear a confirmation message (e.g. “Saved Calibration 2”)
34、. In order to recall a User Calibration, simply perform a short (i.e. less than 1 second) keypress on the User Calibration key where you previously stored a calibration. An “Are you sure?” query will pop up, and by answering Yes to this, the requested calibration will be loaded (you will hear a conf
35、irmation of this also). All User Calibrations will be saved when the program exits, and can be accessed when the program restarts. Although the User Calibrations can be very useful and timesaving, they should generally only be used if you are sure that the lighting conditions will not change too muc
36、h from the time of calibration to the time they are recalled and used (e.g. an indoor location with the same lights turned on). In general, it is still recommended to calibrate regularly for the most accurate results, since lighting conditions often change. Default Calibration Key 7Press this key to
37、 load a predefined calibration for normal lighting conditions. An “Are you sure?” query will pop up, and by answering Yes to this, the default calibration will be loaded (you will hear a confirmation of this also). This is the default calibration that is used when the program is used for the first t
38、ime, and that is loaded into the three User Calibrations before they are used. Although this default calibration may be used in normal or bright CODE FACTORY, S.L. - Rambla dEgara, 148 2 2 - 08221 Terrassa (Barcelona) - SPAIN Tel: +34 93 733 70 66 - Fax: +34 93 789 30 51 www.codefactory.eslighting,
39、it is strongly recommended that the user calibrates using a white object. However in situations where this is not possible, then the user should use this default calibration.Default Low Light Calibration Key 8Press this key to load a predefined calibration for low light conditions. An “Are you sure?
40、” query will pop up, and by answering Yes to this, the default low light calibration will be loaded (you will hear a confirmation of this also). Once again, it is strongly recommended that the user calibrates using a white object wherever possible. However in situations where this is not possible, t
41、hen the user should use this default low light calibration. To determine if there is currently low light conditions, measure the light level (see Measure Light Level section). If it returns Dim, then use this default low light calibration in preference to the default calibration.Multi Colour Key 4Mu
42、lti Colour is toggled On and Off by pressing Key 4. A confirmation message is spoken each time this is done. This setting affects the way in which the Colour Measurement is performed. When set to Multi Colour Off, only one colour is detected in the picture (the one that covers the greatest area of t
43、he picture). However when Multi Colour is set to On, the MCR will detect up to three different colours in the picture. The order that they are spoken relates their area in the picture, so the colours which have the largest area in the picture are spoken first. For a colour to be detected by the MCR,
44、 it must occupy at least 10% of the area of the whole picture, so colours which occupy only a tiny part of the picture will not be detected. Note that if the MCR only detects one colour in the picture, only one colour will be spoken, even if Multi Colour is set to On. The currently loaded setting fo
45、r Multi Colour will be saved when the program exits, and will be reloaded when the program restarts. The first time that the MCR is used, it is set to Off.Speak Confidence Key 5Speak Confidence is toggled On and Off by pressing Key 5. A confirmation message is spoken each time this is done. This set
46、ting affects the Colour Measurement. When set to On, the MCR will speak the confidence in the colour measurement at the end of making the measurement. There are 3 possible levels: High, Medium and Low. This should be used as a rough estimate of the confidence that the MCR has that the colour measure
47、ment is accurate. Note that an assumption is made that the MCR is calibrated to the CODE FACTORY, S.L. - Rambla dEgara, 148 2 2 - 08221 Terrassa (Barcelona) - SPAIN Tel: +34 93 733 70 66 - Fax: +34 93 789 30 51 www.codefactory.escurrent lighting conditions, so the confidence measure may not be usefu
48、l if it is not properly calibrated. The currently loaded setting for Speak Confidence will be saved when the program exits, and will be reloaded when the program restarts. The first time that the MCR is used, it is set to Off.Speak Location Key 6Speak Location is toggled On and Off by pressing Key 6
49、. A confirmation message is spoken each time this is done. This setting affects the way in which the Colour Measurement is performed. When set to Speak Location Off, no information is given regarding the location and distribution of the colour(s) in the picture. However when Speak Location is set to On, the MCR will calculate and speak the location of the different colours in the picture. There are 11 possible locations: Top Left, Top, Top Right, Left, Centre, Right, Bottom Left, Bottom, Bottom Right, All, and Perimeter. When Multi
