[ros-users] Cmvision Blobs Msg Question
Jin, Li
li_jin at brown.edu
Tue Sep 21 01:47:38 UTC 2010
Hi All,
I have a question about cmvision package. When I looked at the blobs msg by
"rostopic echo /blobs", I got things like this.
header:
seq: 466
stamp:
secs: 1285021814
nsecs: 952005043
frame_id: ''
image_width: 640
image_height: 480
blob_count: 0
blobs:
-
red: 0
green: 255
blue: 0
area: 14494
x: 403
y: 168
left: 348
right: 462
top: 40
bottom: 310
-
red: 0
green: 255
blue: 0
area: 364
x: 459
y: 107
left: 444
right: 475
top: 59
bottom: 159
-
red: 0
green: 255
blue: 0
area: 41
x: 476
y: 50
left: 462
My question is, why the blob_count = 0 but there are blob info in the list?
I am especially curious about the one with area of 14494.
Sorry if it is a noob question.
Thanks.
Li
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