Researchers have developed a systematic method of using image-processing techniques to assess the complexity of the background of overhead guide and street name signs under nighttime driving conditions. These techniques are used to extract image properties such as entropy, contrast, energy, homogeneity, the number of saturation pixels, the edge ratio, and the number of objects, all of which are considered potential factors for evaluating background complexity. The researchers combined these factors with ratings of images by human survey participants to develop a multiple linear regression model that could be used by practitioners to evaluate the background complexity of overhead guide and street name signs under nighttime conditions. Because of the small number of samples in the data sets, bootstrapping, a resampling method, was employed to improve the performance of the proposed model. High consistency between the results of the proposed model and the empirical results from the survey demonstrated that the model performed well in analyzing the complexity of the background of traffic signs. Practitioners can use this model to identify overhead guide and street name signs that have highly complex backgrounds and may require sign lighting, supplemental signs, or relocation to minimize driver difficulty in detecting and obtaining information from the signs.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Assessment of Background Complexity of Overhead Guide Signs


    Subtitle :

    Image Processing of Digital Images of Nighttime Roadway Scenes


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2013-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Minimum Retroreflectivity for Overhead Guide Signs and Street Name Signs

    Carlson, Paul J. / Hawkins, H. Gene | Transportation Research Record | 2002


    Aircraft overhead signs

    SEAN O'KELL / LAUREN FLEMING / ROBERT TRUNDLE | European Patent Office | 2019

    Free access

    Aircraft overhead signs

    BACHE RHIAN / O'KELL SEAN | European Patent Office | 2022

    Free access

    Aircraft overhead signs

    SEAN PATRICK O'KELL / RHIAN BACHE | European Patent Office | 2022

    Free access