Epson MOVERIO BT-200 Handbuch

Rev.C

MOVEIRO BT-200

Technical Information for

Application Developer

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Moverio Technical Information （Rev.C） i

Table of Content

Table of ContentTable of Content

Table of Content

1. Scope ..........................................................................................................................1

1.1 Purpose........................................................................................................................................ 1

1.2 Major System Specification....................................................................................................... 1

1.3 Basic Information for Application Development ..................................................................... 2

1.4 Difference from SmartPhone..................................................................................................... 2

2. Supported Functions.................................................................................................3

2.1 Full screen display...................................................................................................................... 4

2.2 Camera control function............................................................................................................. 6

2.3 Sensor switching function......................................................................................................... 8

2.4 3D contents display function..................................................................................................... 9

3. Revision History.......................................................................................................11

Moverio Technical Information （Rev.C） 1

Scope

1.1

Purpose

This documentation describes technical information to support application development for Epson see-through

mobile viewer BT-200.

1.2

Major System Specification

Category

Description

CPU/ABI ARMv7 armeabi

Android API Level 15

Screen Density mdpi (160dpi)

UI Type Tablet UI

Orientation Landscape Only (No rotation by sensor)

USB Vendor ID 0x04B8

1.4

Difference from Smartphone

■HOME/MENU/BACK Keys are hardware buttons

■No touch screen feature on the display itself (only Touch pad on the controller is supported)

■Touch pad uses relative position method similar to PC pointing method

■Only Wi-Fi is supported (3G, LTE and other are not supported)

■No Google certification

Therefore、the following services that need Google certification are not supported:

・Google Play

・Google positioning information service

・Other services that require Google Certification

Moverio Technical Information （Rev.C） 3

Supported Functions

MOVERIO BT-200 supports the following BT-200 specific functions/settings.

Full screen display function

3D contents display function

Switching sensor (from headset to controller, and vice versa)

Camera control parameters

Other than the above BT-200 specific functions, basic functions, such as controlling sensors, are accessed through

Android standard methods/API. Following section describes the above functions.

Moverio Technical Information （Rev.C） 4

2.1

Full screen display

BT-200 uses Android 4.0 Tablet UI. With this UI, Application is typically not allowed to use full screen. However,

application can use full screen with the following setting.

■In Application

Implement the following lines in each Activity onCreate().

Window win = getWindow();

WindowManager.LayoutParams winParams = win.getAttributes();

winParams.flags |= WindowManager.LayoutParams.FLAG_SMARTFULLSCREEN;

win.setAttributes(winParams);

If application has multiple activities, implement above procedure in each Activity.

■Add import definition

import android.view.Window;

import android.view.WindowManager;

To use the import function, the file must be in the SDK. Using the Google standard SDK, the following

modification is used to avoid build errors.

■Modify definition value to immediate value (for Standard SDK)

Definition：FLAG_SMARTFULLSCREEN = 0x80000000;

winParams.flags |= WindowManager.LayoutParams.FLAG_SMARTFULLSCREEN;

winParams.flags |= 0x80000000;

Moverio Technical Information （Rev.C） 5

Full screen is enabled

No Status bar

Full screen is disabled

Status bar

Moverio Technical Information （Rev.C） 6

2.2

Camera control function

The camera resolution is VGA. The resolution is not high when compared with other cameras on smartphones.

This is because BT-200 doesn’t need to display image from its camera on its screen. Use the camera for marker

recognition or normal image capture with the following settings:

 For marker recognition

Use setSceneMode(SCENE_MODE_BARCODE) to Camera class to read markers. It is best optimized to

recognize markers like barcode.

 For Normal image capturing

Use setSceneMode(SCENE_MODE_AUTO) to Camera class.

Function API Value

White Balance setWhiteBalance(x) WHITE_BALANCE_AUTO

WHITE_BALANCE_FLUORESCENT

WHITE_BALANCE_INCANDESCENT

WHITE_BALANCE_DAYLIGHT

WHITE_BALANCE_CLOUDY_DAYLIGHT

Frame rate limit setPreviewFpsRange(x,30000) 4000, 8000, 10000, 15000, 30000

( 4 / 8 / 10 / 15 / 30 fps )

Exposure Setting setExposureCompensation(x) -3 ～+3

Edge enhancement set("sharpness",x) 0 ～7

Digital Zooming setZoom(x) 0 ～10 （0＝x1、10＝x4 ）

Moverio Technical Information （Rev.C） 7

 Example images with settings

SCENE_MODE_AUTO SCENE_MODE_BARCODE

Sharpness +7 White Balance Daylight

Moverio Technical Information （Rev.C） 8

2.3

Sensor switching function

BT-200 has 9 axis sensor set (Accelerometer, Gyro, Compass) on both the controller and headset. Application

program can choose which sensor set to use. (There is no UI for the end user to switch.)

Each sensor axis is set as follows

Sensor Position and axis

Default setting is to use sensors on the controller. Application can switch the setting with the following interface.

 Switching from Application

Switching in Java layer can be done through API (ChangeSensor.java is provided separately).

■Class

ChangeSensor

■Interface

int chgSensorType(int type);

int getSensorType();

■Parameter

type: Sensor type

Sensor Position

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