Referring to the existing model that considers the image boundary as the image background,
the model is still not able to produce an optimum detection. This paper is introducing
the combination features at the boundary known as boundary components affinity that is
capable to produce an optimum measure on the image background. It consists of contrast,
spatial location, force interaction and boundary ratio that contribute to a novel boundary
connectivity measure. The integrated features are capable to produce clearer background
with minimum unwanted foreground patches compared to the ground truth. The extracted
boundary features are integrated as the boundary components affinity. These features were
used for measuring the image background through its boundary connectivity to obtain the
final salient object detection. Using the verified datasets, the performance of the proposed
model was measured and compared with the 4 state-of-art models. In addition, the model
performance was tested on the close contrast images. The detection performance was
compared and analysed based on the precision, recall, true positive rate, false positive
rate, F Measure and Mean Absolute Error (MAE). The model had successfully reduced
the MAE by maximum of 9.4%.