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.
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.
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
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.
|6-axis sine generator, custom waveforms
|A hexapod according to CIPA standard, control and analysis software included, iQ-Trigger and iQ-Mobilemount included
|Max. velocity X, Y, Z
|Max. velocity θX, θY, θZ
|Dimensions (w x h xd)
|348 x 328 x 348 mm
|Available as a separate option (iQ-Drive API since version 2.0.0)
|3rd party product information
|The hexapod is a 3rd party product that IE uses in this context. Image Engineering is not the manufacturer of the hexapod unit.