[openyourmind] εφαρμογές του i-phone για άτομα με οπτική αναπηρία
- From: anna-maria foskolou <firefly.tinos@xxxxxxxxx>
- To: OPENYOURMIND@xxxxxxxxxxxxx
- Date: Fri, 10 May 2013 11:29:02 +0300
http://www.afb.org/afbpress/pub.asp?DocID=aw130404
What is This?: A Review of the VizWiz, Digit-Eyes, and LookTel
Recognizer Apps for the iPhone
Janet Ingber
Have you ever found a can and had no idea what was in it? Have you ever
mixed up socks and couldn't tell their color? VizWiz, Digit-Eyes, and
LookTel Recognizer are three iPhone apps that can help identify items.
An iPhone 4 was used for this review but these apps work on most iOS
devices with cameras.
VizWiz Identification App by ROC HCI
VizWiz is a free and easy-to-use identification app. You take a picture
of an item, record a question, and then send the photo and question to
your choice of: anonymous Web volunteers, IQ Engines (a photo
recognition software platform), your Twitter followers, your Facebook
friends, and/or an e-mail contact. Answers are returned to VizWiz.
How to Use VizWiz
When the app opens, the "Camera" button will be on the screen. Point the
camera towards the object to be identified. Get as much of your object
in the view field as possible. Double-tap the camera button and listen
for the sound of the camera taking the picture.
After the image has been captured, a new screen will load with a Record
button. Double-tap the button and the phone will vibrate. Speak your
question clearly. Double tap the screen when you're finished. A new
screen will load to choose the destination(s) for your question and
picture. Choices are made via toggle switches. Double tapping each
switch activates or deactivates it. Once you've made your choices,
activate the send button. A "Back" button is always available to return
to the previous screen.
After the Send button has been activated, VizWiz loads the "View
Answers" screen. The rate at which answers appear varies, depending on
the item and the responders you've selected. New answers are spoken as
they appear, along with where the answer came from. It may take some
time for all answers to arrive. You can close the app while you wait.
When you re-launch the app, the answer screen will be there.
VizWiz Test Results
Ten minutes elapsed between the time the "Send" button was activated and
the results were reviewed.
Image: A can of Healthy Choice Tomato Basil Soup received two
responses.Question: "What's in this can?"IQ Engines said: "Healthy
Choice Soup"A Web worker said: ""This is a health drink. It is useful
for heart."
Image: A can of Diet Coke received one response.Question: "What's in
this can?"IQ Engines said: "Diet Coke"
Image: Brown, white, and off-white animal print blouseQuestion: "What
does this blouse look like?" received three responses.Web workers said:
"A cloth of some kind."Another Web worker: "Like a tiger skin."IQ
Engines said "Animal print."
Image: A faded Adidas black sock.Question: "What color is this sock?"Two
Web workers said: "gray."IQ Engines said: "Adidas gray sock."
Image: $50 iTunes gift card received three responses.Web worker said:
"Unable to tell what kind."Web worker said: "Can't see that. I see it's
for $50. Try moving camera out."IQ Engines said: "Bar code."
I re-did the photo, following the Web worker's advice and positioned the
camera a little further from the card. Two responses:Web worker said:
"iTunes gift card"IQ Engines said: "bar code."
Conclusion
This app can be very useful when trying to identify items. It's free and
easy to use which makes VizWiz a very good option. For more information
visit the VizWiz website, which contains a tutorial and information
about how the app was developed.
Digit-Eyes Audio Scanner and Labeler by Digital Miracles L.L.C.
Digit-Eyes ($29.99) is a bar code scanning app for the iPhone and iPod
touch. In addition to reading the Universal Product Codes (UPC) or
European Article Numbers (EAN) that appear on labels for a variety of
objects, this app also reads customized bar code labels that you create.
There is a free Lite version with limited features if you'd like to try
it before you buy it.
How To Scan
When Digit-Eyes is opened, the "Scan" button is on the screen. In order
to scan a bar code, you first need to find it, which can be daunting
because usually there is nothing to distinguish its location on a label
or product. On boxes, the codes are frequently on the opposite end of
the sides that are meant to be opened. If a can has a wrapped label, the
code is usually near the seam. If a can does not have a tactile label,
such as a soda can, it needs to be turned until Digit-Eyes can find the
code. The code on a jar with one label is usually toward the side of the
label, away from the center. If the jar has two labels, it will be on
the back label. Usually the front label is larger. On some rectangular
packages, the code is on the longer of the two small sides. It takes
some practice to get comfortable with scanning, especially if you can't
feel the bar code on the product you're trying to identify. The
Digit-Eyes website has sheets you can print out and use for scanning
practice. Unlike a laser scanner, which can be moved quickly across an
item, you need to move more slowly with Digit-Eyes, since it uses the
phone's camera.
Whether scanning an item that came with a bar code or scanning a custom
label, the technique is the same. The only difference is that it's
easier to find the code with a custom label since the label can be felt.
To begin the scanning process, double tap the "Scan" button. The phone
will make a ticking noise as it scans. Move the phone slowly in front of
the item or move the item slowly in front of the phone. Gradually
increase the distance. When Digit-Eyes locates the code, it will beep
and say what the item is. In the case of a can of soup, Digit-Eyes
accurately identified that it was Healthy Choice brand, along with the
kind of soup and the size of the can. Similarly, with a can of Diet
Coke, Digit-Eyes added the size of the can. Digit-Eyes has an extensive
database, but if it cannot recognize the code, the user can then enter a
description using the iPhone's virtual keyboard. The next time that bar
code is encountered, Digit-Eyes will recognize it. When Digit-Eyes
recognizes a bar code, there is a button you can select to perform a
Google search to get more information about the item.
If Digit-Eyes can't read the bar code, try another location on the
object. Frequently, manufacturers put codes in the same general area on
specific products. Your device determines how far the phone should be
from the item. For the iPhone 3, the distance should be 4 to 6 inches.
For the iPhone 4 the distance is 4 to 12 inches and for the iPod Touch
it's 8 to 16 inches. This is not an exact science and distances may need
to be adjusted.
Custom Labels
Digit-Eyes allows the user to create audio labels for items that do not
already have a bar code. When scanning custom labels it's not necessary
to have an Internet connection, since the label's description will be
stored in your phone. Pre-printed bar code labels are available from the
Digit-Eyes website at a cost of $19.99 for 255 labels. A less expensive
option is to buy blank labels and print your own bar codes. Instructions
on how to do this are on the Digit-Eyes website. Set-up for this is a
multi-step process and sighted help will be needed the first time. Once
you have successfully set up your printer and created your first label,
unique new bar codes can be retrieved directly from the Digit-Eyes
website and printed. Sighted assistance will not be required since the
printer has already been set, assuming that you're using the same type
of blank labels. When the bar code is scanned, Digit-Eyes wilt prompt
the user to say a name for the label. Options are also provided to
delete or re-record the spoken information.
Text labels can also be created. You type the text on a form on the
Digit-Eyes website. The text is formatted and then you print out the
text on your own label.
A pack of 50 pre-printed, washable bar code labels, good for identifying
clothing, is also available for $19.99.
The Digit-Eyes website contains audio tutorials and clear instructions.
Conclusion
Although Digit-Eyes is a bit expensive and has a learning curve, it's
very useful. The ability to create custom labels is a big plus.
LookTel Recognizer by LookTel
The LookTel Recognizer ($9.99) uses a photo library and a bar code
scanner to identify objects. The photo library must be created by the
user and the app developers recommend that a person with little or no
vision have a sighted person take the photographs. I do not have any
vision and was able to successfully photograph various objects including
cans, clothing, and boxes for my photo library without sighted
assistance. Objects should be photographed on a plain background with
the maximum amount of the object in the view field.
To take a picture, double tap the "Capture Image" button. Once an item
is photographed, LookTel Recognizer will prompt you for a recorded
description. The app will indicate that the description was recorded.
Once an item is entered into the database, hold the camera in front of
the item. LookTel Recognizer will speak the recorded description. No
buttons need to be pressed. It might be necessary to slowly move the
camera until it recognizes the item and speaks its description.
LookTel Recognizer also contains a bar code scanner. To scan an item,
double tap the "Start Bar Code Scanning" button, hold your device about
6 to 8 inches from the item, and slowly move the camera. When the bar
code is located, the app will beep and speak the item's name and any
other additional information. While Recognizer is scanning it does not
give any type of audio feedback like Digit-Eyes. To insure the app is
still scanning, check the scan button and it should say "Stop Bar Code
Scanning." When LookTel Recognizer locates the bar code, it sounds a
beep and speaks the item's information. If the bar code isn't known, a
Google search is automatically started for the bar code's information.
LookTel Recognizer, like Digit-Eyes, named the brand, type and size of
the scanned soup can. It named the Diet Coke can and said the size.
Using Recognizer, I photographed the same animal print shirt from the
VizWiz test and the description was entered into the photo library. Even
when several unlabeled shirts were presented along with the photographed
one, the app recognized the animal print shirt.
Conclusion
LookTel Recognizer allows for two ways to identify items: through
photographs or using bar codes. Once an item is in the photo library,
it's convenient that scanning does not require any buttons.
The LookTel Recognizer site contains clear documentation on how to use
this app.
The Bottom Line
All of these apps can be very useful for someone with a visual
impairment. Since VizWiz is free, it's worth putting on your device. If
you can afford it, I'd get both Digit-Eyes and LookTel Recognizer. No
app is perfect, but these three apps can make identification much easier.
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