Just noticeable differences in perceived image contrast with changes in displayed image size

Jae Young Park; Sophie Triantaphillidou; Ralph E. Jacobson

doi:10.1117/12.2042534

3 February 2014 Just noticeable differences in perceived image contrast with changes in displayed image size

Jae Young Park, Sophie Triantaphillidou, Ralph E. Jacobson

Proceedings Volume 9016, Image Quality and System Performance XI; 901602 (2014) https://doi.org/10.1117/12.2042534
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States

Abstract

An evaluation of the change in perceived image contrast with changes in displayed image size was carried out. This was achieved using data from four psychophysical investigations, which employed techniques to match the perceived contrast of displayed images of five different sizes. A total of twenty-four S-shape polynomial functions were created and applied to every original test image to produce images with different contrast levels. The objective contrast related to each function was evaluated from the gradient of the mid-section of the curve (gamma). The manipulation technique took into account published gamma differences that produced a just-noticeable-difference (JND) in perceived contrast. The filters were designed to achieve approximately half a JND, whilst keeping the mean image luminance unaltered. The processed images were then used as test series in a contrast matching experiment. Sixty-four natural scenes, with varying scene content acquired under various illumination conditions, were selected from a larger set captured for the purpose. Results showed that the degree of change in contrast between images of different sizes varied with scene content but was not as important as equivalent perceived changes in sharpness¹.

Citation Download Citation

Jae Young Park, Sophie Triantaphillidou, and Ralph E. Jacobson "Just noticeable differences in perceived image contrast with changes in displayed image size", Proc. SPIE 9016, Image Quality and System Performance XI, 901602 (3 February 2014); https://doi.org/10.1117/12.2042534

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available