Stereo Camera does not generate depth image

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My camera is a usb driverless stereo camera that generate both left and right images into one. I'm trying to get the depth image from the camera but after split the images and running the stereo_image_proc there is no topic as "camera/depth/image" but only compressedDepth and which can not be viewed. Is there any package to generate depth image or convert the compresseddepth to viewable depth image? The topic list is shown below

/sxs_stereo/disparity
/sxs_stereo/left/camera_info
/sxs_stereo/left/image_color
/sxs_stereo/left/image_color/compressed
/sxs_stereo/left/image_color/compressed/parameter_descriptions
/sxs_stereo/left/image_color/compressed/parameter_updates
/sxs_stereo/left/image_color/compressedDepth
/sxs_stereo/left/image_color/compressedDepth/parameter_descriptions
/sxs_stereo/left/image_color/compressedDepth/parameter_updates
/sxs_stereo/left/image_color/theora
/sxs_stereo/left/image_color/theora/parameter_descriptions
/sxs_stereo/left/image_color/theora/parameter_updates
/sxs_stereo/left/image_mono
/sxs_stereo/left/image_mono/compressed
/sxs_stereo/left/image_mono/compressed/parameter_descriptions
/sxs_stereo/left/image_mono/compressed/parameter_updates
/sxs_stereo/left/image_mono/compressedDepth
/sxs_stereo/left/image_mono/compressedDepth/parameter_descriptions
/sxs_stereo/left/image_mono/compressedDepth/parameter_updates
/sxs_stereo/left/image_mono/theora
/sxs_stereo/left/image_mono/theora/parameter_descriptions
/sxs_stereo/left/image_mono/theora/parameter_updates
/sxs_stereo/left/image_raw
/sxs_stereo/left/image_raw/compressed
/sxs_stereo/left/image_raw/compressed/parameter_descriptions
/sxs_stereo/left/image_raw/compressed/parameter_updates
/sxs_stereo/left/image_raw/compressedDepth
/sxs_stereo/left/image_raw/compressedDepth/parameter_descriptions
/sxs_stereo/left/image_raw/compressedDepth/parameter_updates
/sxs_stereo/left/image_raw/theora
/sxs_stereo/left/image_raw/theora/parameter_descriptions
/sxs_stereo/left/image_raw/theora/parameter_updates
/sxs_stereo/left/image_rect
/sxs_stereo/left/image_rect/compressed
/sxs_stereo/left/image_rect/compressed/parameter_descriptions
/sxs_stereo/left/image_rect/compressed/parameter_updates
/sxs_stereo/left/image_rect/compressedDepth
/sxs_stereo/left/image_rect/compressedDepth/parameter_descriptions
/sxs_stereo/left/image_rect/compressedDepth/parameter_updates
/sxs_stereo/left/image_rect/theora
/sxs_stereo/left/image_rect/theora/parameter_descriptions
/sxs_stereo/left/image_rect/theora/parameter_updates
/sxs_stereo/left/image_rect_color
/sxs_stereo/left/image_rect_color/compressed
/sxs_stereo/left/image_rect_color/compressed/parameter_descriptions
/sxs_stereo/left/image_rect_color/compressed/parameter_updates
/sxs_stereo/left/image_rect_color/compressedDepth
/sxs_stereo/left/image_rect_color/compressedDepth/parameter_descriptions
/sxs_stereo/left/image_rect_color/compressedDepth/parameter_updates
/sxs_stereo/left/image_rect_color/theora
/sxs_stereo/left/image_rect_color/theora/parameter_descriptions
/sxs_stereo/left/image_rect_color/theora/parameter_updates
/sxs_stereo/points2
/sxs_stereo/right/camera_info
/sxs_stereo/right/image_color
/sxs_stereo/right/image_color/compressed
/sxs_stereo/right/image_color/compressed/parameter_descriptions
/sxs_stereo/right/image_color/compressed/parameter_updates
/sxs_stereo/right/image_color/compressedDepth
/sxs_stereo/right/image_color/compressedDepth/parameter_descriptions
/sxs_stereo/right/image_color/compressedDepth/parameter_updates
/sxs_stereo/right/image_color/theora
/sxs_stereo/right/image_color/theora/parameter_descriptions
/sxs_stereo/right/image_color/theora/parameter_updates
/sxs_stereo/right/image_mono
/sxs_stereo/right/image_mono/compressed
/sxs_stereo/right/image_mono/compressed/parameter_descriptions
/sxs_stereo/right/image_mono/compressed/parameter_updates
/sxs_stereo/right/image_mono/compressedDepth
/sxs_stereo/right/image_mono/compressedDepth/parameter_descriptions
/sxs_stereo/right/image_mono/compressedDepth/parameter_updates
/sxs_stereo/right/image_mono/theora
/sxs_stereo/right/image_mono/theora/parameter_descriptions
/sxs_stereo/right/image_mono/theora/parameter_updates
/sxs_stereo/right/image_raw
/sxs_stereo/right/image_raw/compressed
/sxs_stereo/right/image_raw/compressed/parameter_descriptions
/sxs_stereo/right/image_raw/compressed/parameter_updates
/sxs_stereo/right/image_raw/compressedDepth
/sxs_stereo/right/image_raw/compressedDepth/parameter_descriptions
/sxs_stereo/right/image_raw/compressedDepth/parameter_updates
/sxs_stereo/right/image_raw/theora
/sxs_stereo/right/image_raw/theora/parameter_descriptions
/sxs_stereo/right/image_raw/theora/parameter_updates
/sxs_stereo/right/image_rect
/sxs_stereo/right/image_rect/compressed
/sxs_stereo/right/image_rect/compressed/parameter_descriptions
/sxs_stereo/right/image_rect/compressed/parameter_updates
/sxs_stereo/right/image_rect/compressedDepth
/sxs_stereo/right/image_rect/compressedDepth/parameter_descriptions
/sxs_stereo/right/image_rect/compressedDepth/parameter_updates
/sxs_stereo/right/image_rect/theora
/sxs_stereo/right/image_rect/theora/parameter_descriptions
/sxs_stereo/right/image_rect/theora/parameter_updates
/sxs_stereo/right/image_rect_color
/sxs_stereo/right/image_rect_color/compressed
/sxs_stereo/right ...