| CN selects the highest-energy SN in the camera cluster as the image compression cluster head (ICH) |
| if Node is ICH then |
| if Node receives image from the CN then |
| Select a specified number of SNs that have the highest energy |
| in the image compression cluster as the members |
| if Has member in image compression cluster and the shortcut tasks are |
| greater than its normal tasks then |
| ICH applies one level of DWT on the image |
| ICH encodes HH, HL, and LH |
| ICH sends the LL to nearest member node in the image compression cluster |
| Else |
| ICH performs all compression tasks |
| ICH sends the compressed data to the ICH’s communication CH |
| end if |
| end if |
| if Compression tasks are finished then |
| ICH combines all compressed data and sends them to the ICH’s communication CH |
| end if |
| else if Node is member of the image compression cluster then |
| if Node receives LL from another SN in the image compression cluster then |
| Find the next-nearest SN in the image compression cluster |
| if Has the next-nearest node in image compression cluster then |
| Node applies one level of DWT on LL of the previous level |
| Node encodes HH, HL, and LH and sends the compressed data to the ICH |
| Node sends the LL of this level to the nearest member node in the image |
| compression cluster |
| Else |
| Node performs the remaining compression tasks |
| Node sends the compressed data to the ICH |
| end If |
| end If |
| end if |
