Which Camera to Use
Kaptivo Solo will, in principle, work with any camera that the operating system of your computer recognises.
If you have, or can get, a USB webcam, then this is a great option to use. For good results, we recommend cameras with at least full-HD resolution (1920x1080) at 30fps.
The following cameras have been tested:
- Logitech Brio
- Logitech C930e
- AVer CAM340+
- Papalook PA452
Mobile Phone as a Virtual Video Camera
There are several mobile applications that allow a mobile phone to act a virtual camera for a computer. For example, EpocCam and DroidCam are available for iOS and Android respectively.
How to Position the Camera
The 'rule-of-thumb' to follow for good results is to aim for the 'content capture area' (i.e the whiteboard or paper) to fill a large proportion of the camera's field-of-view, so that the resolution of the captured image is maximised.
Kaptivo Solo can correct for geometrical distortion, so the camera does not necessarily need to be positioned normal to the plan of the whiteboard or paper. However, if the angle is too far from the normal, the amount of 'keystone-distortion' of the target area will be very great and this will result in a loss of resolution in the output image.
The user should also ensure that the environment is well lit, since operating in a dark environment can produce unwanted visual artefacts.
Example of Very Good Setup
The setup shown below is very good, because the paper fills a high proportion of the camera view.
Example of Reasonably Good Setup
The setup shown below is reasonably good, and should produce decent results, but because less of the field of view is filled by the paper, the output resolution will be lower than it could be.
Examples of Marginal Setup
The setups shown below are marginal, and should produce OK results, but because only half of the field of view is filled by the paper, the output resolution will be lower than it could be.
Examples of Bad Setup
The setup shown below is bad because the camera field of view is clipping the paper. In this situation, either the camera or the paper should be moved, so that the whole paper can be seen.
Using Kaptivo Solo with Whiteboards
Suggested Camera Mounting Tips
The key thing to bear in mind when positioning a camera to capture content from a whiteboard is how to minimise the time that the person writing on the whiteboard will block the view of the camera of the writing with their body. This process of blocking the view is known as 'occlusion'.
The Kaptivo Wall Mount camera is deliberately positioned above the board, close to the whiteboard, so as to minimise occlusion. However, this is only possible because this camera includes unique optical components that can cope with the extreme capture angle whilst minimising distortion and reflections. For the 'best' experience with a whiteboard, we do recommend purchasing the Kaptivo Wall Mount Camera. A link to the 'Work from Home Bundle' in the Kaptivo Web Shop can be found here.
When using an off-the-shelf camera, such as a USB webcam, with Kaptivo Solo to capture content on a whiteboard, a webcam sat on a table, pointing at a whiteboard can work well.
Suggested Usage Tips
It may be worth positioning the camera a little to the left, so that as people write from left to right, the writer will move out of the way of the camera view faster.
Using Kaptivo Solo with Paper on a Table
Suggested Camera Mounting Heights
For the table-top use-case, the positioning of the camera relative to paper on the table must be chosen carefully. Since the field-of-view will vary between different cameras, the user will need to experiment with camera position to find a good position.
After experimenting with a number of cameras, the following heights are suggested as starting points for users to try:
|Paper Size||Suggested Camera Mounting Height (cm)|
Suggested Camera Mounting Methods
Using an off-the-shelf tripod can work well with mounting a webcam for the table-down use-case. Most webcams have a tripod mount option.
Resources and Examples