wiki:v2:line_quickstart
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This shows you the differences between two versions of the page.
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wiki:v2:line_quickstart [2018/07/03 19:41] pixycam |
wiki:v2:line_quickstart [2018/11/26 18:32] jfrench typo |
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| - | What Pixy2 has done is found the best line candidate to track and has assigned it to the Vector. The Vector is the line that Pixy2 (or your robot) is currently tracking/following. You can move the paper and see that Pixy2 can track the line fairly quickly. PixyMon slows down the tracking algorithm typically to 20-30 frames-per-second because it takes some time to send the raw frame data across USB, but if you change the view to "no background", you can get a feel for what the tracking algorithm looks like at the native 60 frames-per-second. | + | What Pixy2 has done is found the best line candidate to track and has assigned it to the Vector. The Vector is the line that Pixy2 (or your robot) is currently tracking/following. You can move the paper and see that Pixy2 can track the line fairly quickly. PixyMon slows down the tracking algorithm typically to 20-30 frames-per-second because it takes some time to send the raw frame data across USB, but if you change the view to "no background" (see pic below), you can get a feel for what the tracking algorithm looks like at the native 60 frames-per-second. |
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| - | This is framerate your robot will see. | + | This (60 fps) is framerate your robot will see. |
| You can also see what happens when you turn on Pixy2's lamp. | You can also see what happens when you turn on Pixy2's lamp. | ||
| Line 31: | Line 31: | ||
| - | Note, with the lamp on, Pixy2 can typically reduce the exposure (sampling) time of the image, which reduces motion blur. In general, motion blur happens because a camera is sampling a subject while the subject is moving. In this case the subject is a line (or set of lines). If they are blurred due to motion (the motion of your robot), it can make the lines more difficult for Pixy2 to detect and track. Pixy2's lamp can help with this. The upshot is that the lamp can improve the speed your robot can move! | + | Note, with the lamp on, Pixy2 will typically reduce the exposure (sampling) time of the image, which reduces motion blur. In general, motion blur happens because a camera is sampling a subject while the subject is moving. In this case, the subject is a line (or set of lines). If they are blurred due to motion (the motion of your robot), it can make the lines more difficult for Pixy2 to detect and track. Pixy2's lamp can help with this. The upshot is that the lamp makes your robot go faster! |
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| <code> | <code> | ||
| - | vector: (43 31) (60 39) index: 3 flags 4 | + | vector: (38 51) (39 9) index: 0 flags 4 |
| - | vector: (43 31) (60 39) index: 3 flags 0 | + | vector: (37 51) (38 10) index: 0 flags 4 |
| - | vector: (44 39) (68 33) index: 2 flags 4 | + | vector: (37 51) (40 12) index: 0 flags 4 |
| - | vector: (44 39) (68 33) index: 2 flags 4 | + | vector: (37 51) (37 13) index: 0 flags 4 |
| - | vector: (44 40) (67 32) index: 2 flags 0 | + | vector: (36 51) (40 15) index: 0 flags 4 |
| - | vector: (44 40) (67 32) index: 2 flags 0 | + | vector: (36 16) (38 0) index: 2 flags 4 |
| - | vector: (39 38) (69 38) index: 9 flags 0 | + | intersection: (36 16) |
| - | vector: (39 38) (69 38) index: 9 flags 0 | + | 0: index: 7 angle: -88 |
| - | intersection: (39 25) | + | 1: index: 2 angle: -7 |
| - | 0: index: 68 angle: -122 | + | 2: index: 1 angle: 93 |
| - | 1: index: 117 angle: -3 | + | 3: index: 0 angle: 180 |
| - | 2: index: 106 angle: 90 | + | vector: (34 16) (37 0) index: 2 flags 4 |
| - | 3: index: 95 angle: 158 | + | vector: (36 19) (37 0) index: 2 flags 4 |
| - | vector: (44 40) (67 32) index: 2 flags 0 | + | vector: (39 21) (37 0) index: 2 flags 4 |
| - | vector: (39 38) (69 38) index: 9 flags 0 | + | vector: (35 22) (37 0) index: 2 flags 4 |
| - | vector: (39 38) (69 38) index: 9 flags 0 | + | vector: (35 23) (37 0) index: 2 flags 4 |
| + | vector: (35 24) (37 0) index: 2 flags 4 | ||
| + | vector: (35 25) (37 0) index: 2 flags 4 | ||
| + | ... | ||
| </code> | </code> | ||
wiki/v2/line_quickstart.txt · Last modified: 2019/01/30 01:50 by pixycam
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