Stereo_image_proc Rviz Fixed Frame Query

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Hi, I'm try stereo_image_proc node with uvc_camera node and I need show in rviz disparity points information. With image_view I see that image without problem but when I try to show in rviz I don't know what fixed frame is needed. This is the rostopic list:

/rosout
/rosout_agg
/stereo/disparity
/stereo/left/camera_info
/stereo/left/image_color
/stereo/left/image_color/compressed
/stereo/left/image_color/compressed/parameter_descriptions
/stereo/left/image_color/compressed/parameter_updates
/stereo/left/image_color/compressedDepth
/stereo/left/image_color/compressedDepth/parameter_descriptions
/stereo/left/image_color/compressedDepth/parameter_updates
/stereo/left/image_color/theora
/stereo/left/image_color/theora/parameter_descriptions
/stereo/left/image_color/theora/parameter_updates
/stereo/left/image_mono
/stereo/left/image_mono/compressed
/stereo/left/image_mono/compressed/parameter_descriptions
/stereo/left/image_mono/compressed/parameter_updates
/stereo/left/image_mono/compressedDepth
/stereo/left/image_mono/compressedDepth/parameter_descriptions
/stereo/left/image_mono/compressedDepth/parameter_updates
/stereo/left/image_mono/theora
/stereo/left/image_mono/theora/parameter_descriptions
/stereo/left/image_mono/theora/parameter_updates
/stereo/left/image_raw
/stereo/left/image_raw/compressed
/stereo/left/image_raw/compressed/parameter_descriptions
/stereo/left/image_raw/compressed/parameter_updates
/stereo/left/image_raw/compressedDepth
/stereo/left/image_raw/compressedDepth/parameter_descriptions
/stereo/left/image_raw/compressedDepth/parameter_updates
/stereo/left/image_raw/theora
/stereo/left/image_raw/theora/parameter_descriptions
/stereo/left/image_raw/theora/parameter_updates
/stereo/left/image_rect
/stereo/left/image_rect/compressed
/stereo/left/image_rect/compressed/parameter_descriptions
/stereo/left/image_rect/compressed/parameter_updates
/stereo/left/image_rect/compressedDepth
/stereo/left/image_rect/compressedDepth/parameter_descriptions
/stereo/left/image_rect/compressedDepth/parameter_updates
/stereo/left/image_rect/theora
/stereo/left/image_rect/theora/parameter_descriptions
/stereo/left/image_rect/theora/parameter_updates
/stereo/left/image_rect_color
/stereo/left/image_rect_color/compressed
/stereo/left/image_rect_color/compressed/parameter_descriptions
/stereo/left/image_rect_color/compressed/parameter_updates
/stereo/left/image_rect_color/compressedDepth
/stereo/left/image_rect_color/compressedDepth/parameter_descriptions
/stereo/left/image_rect_color/compressedDepth/parameter_updates
/stereo/left/image_rect_color/theora
/stereo/left/image_rect_color/theora/parameter_descriptions
/stereo/left/image_rect_color/theora/parameter_updates
/stereo/points
/stereo/points2
/stereo/proc/parameter_descriptions
/stereo/proc/parameter_updates
/stereo/proc_debayer_left/parameter_descriptions
/stereo/proc_debayer_left/parameter_updates
/stereo/proc_debayer_right/parameter_descriptions
/stereo/proc_debayer_right/parameter_updates
/stereo/proc_rectify_color_left/parameter_descriptions
/stereo/proc_rectify_color_left/parameter_updates
/stereo/proc_rectify_color_right/parameter_descriptions
/stereo/proc_rectify_color_right/parameter_updates
/stereo/proc_rectify_mono_left/parameter_descriptions
/stereo/proc_rectify_mono_left/parameter_updates
/stereo/proc_rectify_mono_right/parameter_descriptions
/stereo/proc_rectify_mono_right/parameter_updates
/stereo/right/camera_info
/stereo/right/image_color
/stereo/right/image_color/compressed
/stereo/right/image_color/compressed/parameter_descriptions
/stereo/right/image_color/compressed/parameter_updates
/stereo/right/image_color/compressedDepth
/stereo/right/image_color/compressedDepth/parameter_descriptions
/stereo/right/image_color/compressedDepth/parameter_updates
/stereo/right/image_color/theora
/stereo/right/image_color/theora/parameter_descriptions
/stereo/right/image_color/theora/parameter_updates
/stereo/right/image_mono
/stereo/right/image_mono/compressed
/stereo/right/image_mono/compressed/parameter_descriptions
/stereo/right/image_mono/compressed/parameter_updates
/stereo/right/image_mono/compressedDepth
/stereo/right/image_mono/compressedDepth/parameter_descriptions
/stereo/right/image_mono/compressedDepth/parameter_updates
/stereo/right/image_mono/theora
/stereo/right/image_mono/theora/parameter_descriptions
/stereo/right/image_mono/theora/parameter_updates
/stereo/right/image_raw
/stereo/right/image_raw/compressed
/stereo/right/image_raw/compressed/parameter_descriptions
/stereo/right/image_raw/compressed/parameter_updates
/stereo/right/image_raw/compressedDepth
/stereo/right/image_raw/compressedDepth/parameter_descriptions
/stereo/right/image_raw/compressedDepth/parameter_updates
/stereo/right/image_raw/theora
/stereo/right/image_raw/theora/parameter_descriptions
/stereo/right/image_raw/theora/parameter_updates
/stereo/right/image_rect
/stereo/right/image_rect/compressed
/stereo/right/image_rect/compressed/parameter_descriptions
/stereo/right/image_rect/compressed/parameter_updates
/stereo/right/image_rect/compressedDepth
/stereo/right/image_rect/compressedDepth/parameter_descriptions
/stereo/right/image_rect/compressedDepth/parameter_updates
/stereo/right/image_rect/theora
/stereo ...