Title :
Uniformity grade evaluation of flat panel displays by visual sensitivity
Author :
Asano, Toshio ; Morimoto, Yuichi ; Takagi, Yuji
Author_Institution :
Hiroshima Inst. of Technol., Hiroshima, Japan
Abstract :
A novel method that can be used to evaluate image quality of luminance uniformity of flat pane displays (FPDs) has been developed. This method is capable of evaluating the edge gradients of the non-uniform regions. This is accomplished by converting the original image into a visual sensitivity image using a contrast sensitivity function filter. The experiments were executed by using pseudo non-uniform samples and real LCD displays. It was shown that the average of the visual sensitivity values of the non-uniform regions correlated strongly to the grades obtained by human evaluation. The proposed method can be used to evaluate uniformity grades at any viewing distance, which is very important for uniformity evaluation.
Keywords :
computer vision; flat panel displays; liquid crystal displays; LCD display; contrast sensitivity function filter; edge gradient; flat panel display; image quality; luminance uniformity grade evaluation; visual sensitivity; Filtering; Filters; Flat panel displays; Humans; Image converters; Image edge detection; Liquid crystal displays; Production; Shape; Testing;
Conference_Titel :
Industrial Electronics, 2009. IECON '09. 35th Annual Conference of IEEE
Conference_Location :
Porto
Print_ISBN :
978-1-4244-4648-3
Electronic_ISBN :
1553-572X
DOI :
10.1109/IECON.2009.5415341