Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Camera | Sensor resolution | Sensor | Output | CPU usage | IR LEDs |
| --- | --- | --- | --- | --- | --- |
| Ideal webcam | 640x480 | monochrome | highly compressed | small | Yes |
| OEM IR webcam | 640x480 | color | JPEG compressed | small | Yes |
| Sony PlayStation EyeToy | 640x480 | color | JPEG compressed | small | No |
| Sony PlayStation 3 Eye | 640x480 | color | JPEG compressed, raw | small | No |
| Microsoft Xbox Live Vision | 640x480 | color | JPEG compressed, raw | small | No |
| Nintendo Wii Remote | 128x96 | color | point coordinates | none | No |
| NaturalPoint TrackIR 1 | 60k pixels (e.g. 300x200) | monochrome | binary threshold | minimal | Yes |
| NaturalPoint TrackIR 2 | 60k pixels (e.g. 300x200) | monochrome | binary threshold | minimal | Yes |
| NaturalPoint TrackIR 3 | 355x288 | monochrome | binary threshold | minimal | Yes |
| NaturalPoint TrackIR 3 Pro | 355x288 | monochrome | binary threshold | minimal | Yes |
| NaturalPoint TrackIR 4 Pro | 355x288 (subsampled at 710x480) | monochrome | binary threshold | minimal | Yes |
| NaturalPoint TrackIR 5 | 640x480 | monochrome | grayscale threshold | minimal | Yes |
| NaturalPoint SmartNav 1/2 | 60k pixels (e.g. 300x200) | monochrome | binary threshold | minimal | Yes |
| NaturalPoint SmartNav 3 | 355x288 | monochrome | binary threshold | minimal | Yes |
| NaturalPoint SmartNav 4 | 640x480 (subsampled at 1280x480 ) | monochrome | grayscale threshold | minimal | Yes |
Question:
What was the sensor with a resolution of 355x288 for a Naturalpoint Trackir 3?
Answer:
monochrome