SingleChannelHistogram¶
Compute histogram of single channel image.
Subscribing Topic¶
~input
(sensor_msgs/Image
)Input image. It should has CV_8UC1 as encoding.
~input/mask
(sensor_msgs/Image
)Mask image. if
~use_mask
is true, histogram is computed with this mask image.
Publishing Topic¶
~output
(jsk_recognition_msgs/ColorHistogram
)Histogram of
~input
image.
Parameters¶
~use_mask
(Boolean, default:false
)If this parameter is set true, histogram is computed with mask image.
~hist_size
(Integer, default:10
)The number of bins of histogram.
This parameter can be changed by
dynamic_reconfigure
.~min_value
(Double, default:0.0
)~max_value
(Double, default:256.0
)Minimum and maximum value of histogram.
These parameters can be changed by
dynamic_reconfigure
.
Sample¶
roslaunch jsk_perception sample_single_channel_histogram.launch