STEVE-6D

Automated OIS tests with six degrees of freedom

STEVE executes controlled movements and delivers results about the performance of a camera’s image stabilizer.

The Stabilization Evaluation Equipment (STEVE) has been developed for the qualitative analysis of (optical) image stabilizers (OIS). The Image Stabilizers provide a better image quality by compensating for the human hand’s natural tremor: if the stabilization is working well, it can prevent blurring in the image.

A digital camera or mobile phone must first be mounted securely on the hardware to begin a measurement with STEVE. The software solution gives the user the ability to define any arbitrary motion with six degrees of freedom and thus put STEVE-6D in a controlled vibration. The software also controls iQ-Trigger, a remote-controlled, mechanical “finger,” which presses the camera’s shutter button. The software’s analysis module evaluates the resulting images. The results provide insight into the image stabilizer’s performance.

六自由度自動 OIS 測試

STEVE 可執行受控運動並提供有關相機圖像穩定器性能的結果。

防抖評估設備（STEVE）是為定性分析（光學）圖像穩定器（OIS）而開發的。圖像穩定器通過補償人的手的自然顫動來提供更好的圖像質量：如果穩定器工作良好，就能防止圖像模糊。

首先必須將數碼相機或手機穩固地安裝在硬件上，才能開始使用 STEVE 進行測量。軟件解決方案使用戶能夠定義具有六個自由度的任意運動，從而使 STEVE-6D 處於受控振動狀態。軟件還可以控制 iQ-Trigger，這是一個遙控機械 “手指”，可以按下相機的快門按鈕。軟件的分析模塊會對生成的圖像進行評估。結果可幫助用戶深入瞭解圖像穩定器的性能。

分類: 測試設備

描述
下載文件

Technical information

STEVE-2D, the previous model, performed actions with two degrees of freedom; STEVE-6D provides six degrees of freedom. The intricate movements are carried out using a hexapod. An efficient control software individually controls the frequency and amplitude of each movement direction. The software’s analysis function automatically evaluates the recordings from the test chart TE261 and presents the results of the image stabilizer’s performance numerically and graphically.

Different vibrations can be generated using STEVE: a CIPA compliant vibration is possible as well as sine waves or individual waveforms. All movements can be reproduced and repeated accurately and in the same way when using STEVE.

Included in the delivery for STEVE-6D is the hardware (hexapod), the control and analysis software, the automated shutter-triggering device iQ-Trigger as well as the iQ-Mobilemount. Ideally, STEVE-6D should be combined with the test chart TE261 and the iQ-AF Box. The iQ-Anchor is available as an accessory to securely attach STEVE. Another option is to mount STEVE on the Honeycomb Breadboard, a stable board for use with an already available table.

技術信息

STEVE-2D 是前一個型號，以兩個自由度執行動作；STEVE-6D 提供六個自由度。複雜的動作是通過六腳架實現的。高效的控制軟件可單獨控制每個運動方向的頻率和振幅。軟件的分析功能可自動評估來自測試圖表 TE261 的記錄，並以數字和圖形方式顯示圖像穩定器的性能結果。

使用 STEVE 可以產生不同的振動：可以產生符合 CIPA 標準的振動、正弦波或單個波形。使用 STEVE 時，所有動作都能以相同的方式準確再現和重復。

STEVE-6D 的供貨包括硬件（六腳架）、控制和分析軟件、自動快門觸發裝置 iQ-Trigger 以及 iQ-Mobilemount。理想情況下，STEVE-6D 應與測試圖 TE261 和 iQ-AF Box 結合使用。iQ-Anchor 可作為附件安全地安裝 STEVE。另一種方法是將 STEVE 安裝在蜂窩狀麵包板上，這是一種可與現有工作台一起使用的穩定板。

Software STEVE-6D

The software consists of two modules:

1. Vibration control module

to control movement
Interface to STEVE-6D

Choose Pivot-point as required
Interface to iQ-Trigger

triggering of the camera
Set up waveform data

with the sine wave generator for every axis
chose one of the three CIPA handshakes
or upload a custom waveform with Cartesian coordinates

2. Analyze data module

calculation of the image stabilization performance
Metadata tool

Set Camera Metadata if not available

pixel pitch and shutter time are necessary for calculation

image batch processing for IS performance calculation

comparison IS ON and IS OFF
Displays the results

stabilization performance in f-stops
the edge spread function “ESF”
spatial frequency response “SFR”

Mobile phone challenges

Please see this paper, published at the Electronic Imaging Conference, for details about the limitations of measuring the OIS performance with mobile phones.