Towards a new image quality metric for evaluating the effects of tiled displays

Tiled displays provide an effective means of displaying very large images but these displays suffer from unique grid-type distortions. These are caused by the gaps between each sub-display´s active area and have been largely ignored in the image quality assessment (IQA) literature. Recent work has suggested that current IQA metrics perform poorly when evaluating the effects of grid distortions and demonstrated the need for a new metric. This paper introduces this new IQA metric and tests it against a significantly expanded IQA database for grid-distorted images. We describe this new metric in detail and show how it provides a clear improvement over existing IQA quality metrics in evaluation of tiled image quality.