Fig. 3
From: AfterQC: automatic filtering, trimming, error removing and quality control for fastq data
The output images of AfterQC deBubble. a is a sub-image of a lane of NextSeq 500 sequencer, from which we can find 1 bubble detected. b shows enlarged details of the bubble. c shows a sub-image of a tile of HiSeq 3000 with similar resolution of (b), which has much fewer polyX reads