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Output Function Evaluation of the
Intelligent Drinking Water Machine
for The Blind by using Image
Recognition
以影像辨識評估現有盲用飲水機之出水功能
Speaker：Bo-Hung Chen
Adviser： Dr. Shih-Chung Chen
Outline
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Introduction
Paper review
Patent
Material
Methods
Results & Discussion
Introduction
Motive
• How to make existing drinking water
machine become non-contact？(Or reduce
the number of contacts)
• What can we use？
• Why?
What’s Blind Common Problems
• Scald？
• Biochemical infection？
Drinking Water Machine
Designed for The Blind
Paper Review
Paper review 1
WATER LEVEL INDICATOR IN A PAPER CUP USING
IMAGE PROCESSING TECHNIQUES
Shih-Chung Chen, Phung Thi Phuong Thuy,
Rubie Fernando Viñas and Ching-Yi Chien
The Institute of Electrical Engineering, Southern Taiwan University
• Use LabVIEW and Vision Assistant
• Determine the presence and the
percentage of water in the cup
Width (X)
Big Circle
Medium Circle
Small Circle
text
Bx
Mx
Sx
Height (Y)
Problem Found
• Don’t know the cup height(Because
camera is on the top, Image will become
2D), so it only can be used in paper cup.
• We have to determine the presence and
the percentage of water in the cup, but we
don’t have water outlets.
• Flow chart isn’t correct.
Patent
Patent
• The first found relevant
patent.
• Because this method has
been registered, So it can't
be used.
• I can’t find other related
patents untill now.
Material
Material
• Use the chemical
experimental equipment
to simulation of water flow
down from a height.
Material
• Install the light source and USB camera
for the outlet
Laser light source
Look up
LED
USB Camera
Overlooking
Methods
Image capture
Interception of images using video software
Original
Maximum clear value
Minimum clear value
Image capture
Contrast and brightness adjustment
Maximum contrast value
Minimum brightness value
Maximum contrast value
Maximum brightness value
Maximum contrast value
Image capture
Water Circle
Top Circle
Coffee cup(Original image)
Top Circle
Paper cup(Original image)
Problem & Solution
• Case 1：Water column will block top area
Capture the image at first
• Case 2：Bubble problem
Down the outlet and let flow rate
consistent
• Case 3：Water wave problem
Not big deal！
• Case 4：Water splash
Not exist (If Case 2 and 3 has
been solve)
Methods
待機模式(預設為盲用飲水模式偵測)
偵測到使用者將杯體置放
偵查是否已將
手抽離
No
以語音要求使用者將手抽離
是否自訂需求
水量
No
進行自動注水程序
方法1
Yes
開始判斷是否
為圓型杯頂
Yes
進行使用者自訂水量程序
Yes
Yes
No
方法2
注水開始
注水至完成水量
是否已取走水
杯
No
以語音方式提醒使用者已完成注水程序
Method 1
If the top area is an circle
Schematic diagram
Method 2
If the top area is not circle
Rule of thumb
• Glass manufacturers have to consider
their products is competitive, so they
can’t desing a cup which is hard to use
or pick up
• PET bottle can’t use in this method
Results & Discussion
Results
• Reduce the number of contacts
• Error can be ignored
• Transparent cup can’t use this method
Discussion
• Is it possible that transparent cup can use
this method?
• Why error can be ignored? Why not?
• Any other methods?(Lower price)
Thanks for your
attention!