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

• Introduction• Paper review• Patent• Material• Methods• Results & Discussion

Outline

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

text

Sx

Mx

Bx

Width (X)

Height (Y)

Big Circle

Medium Circle

Small Circle

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 outletUSB CameraLEDLaser light source

Look up 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 valueMinimum brightness value

Maximum contrast valueMaximum brightness value

Maximum contrast value

Image capture

Coffee cup(Original image) Paper cup(Original image)

Water Circle

Top Circle Top Circle

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

Yes

開始判斷是否為圓型杯頂

是否自訂需求水量

方法1 方法2

進行使用者自訂水量程序 進行自動注水程序Yes No

Yes No

注水開始

以語音要求使用者將手抽離No

注水至完成水量

是否已取走水杯 以語音方式提醒使用者已完成注水程序No

Yes

Method 1If the top area is an circle

Schematic diagram

Method 2If the top area is not circle

Rule of thumb• Glass manufacturers have to consider thei

r 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!