TY - GEN
T1 - Subjective image quality tradeoffs between spatial resolution and quantization noise
AU - Bae, Soo Hyun
AU - Pappas, Thrasyvoulos N.
AU - Juang, Biing Hwang
PY - 2006
Y1 - 2006
N2 - The importance of tradeoffs between spatial resolution and quantization noise has been examined in our previous work. Subjective experiments indicate that as the bitrate decreases, human observers generally prefer to reduce image resolution in order to maintain image quality, but the amount of distortion they are willing to accept increases with decreasing resolution. In this paper, we conducted further experiments with several images, different encoders, and a finer set of bitrates to determine the preferred resolution at each bitrate, and also the resolution at which there are no visible coding artifacts. Analysis of the subjective results using a wavelet-based perceptual quality metric verifies our earlier conclusion that human observers tend to reduce resolution in order to maintain image quality, but are willing to accept more artifacts as image size decreases.
AB - The importance of tradeoffs between spatial resolution and quantization noise has been examined in our previous work. Subjective experiments indicate that as the bitrate decreases, human observers generally prefer to reduce image resolution in order to maintain image quality, but the amount of distortion they are willing to accept increases with decreasing resolution. In this paper, we conducted further experiments with several images, different encoders, and a finer set of bitrates to determine the preferred resolution at each bitrate, and also the resolution at which there are no visible coding artifacts. Analysis of the subjective results using a wavelet-based perceptual quality metric verifies our earlier conclusion that human observers tend to reduce resolution in order to maintain image quality, but are willing to accept more artifacts as image size decreases.
KW - Human visual perception
KW - Image and video quality
KW - Just noticeable distortion
KW - Noise visibility
KW - Scalability
UR - http://www.scopus.com/inward/record.url?scp=78649809092&partnerID=8YFLogxK
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U2 - 10.1109/ICIP.2006.312927
DO - 10.1109/ICIP.2006.312927
M3 - Conference contribution
AN - SCOPUS:78649809092
SN - 1424404819
SN - 9781424404810
T3 - Proceedings - International Conference on Image Processing, ICIP
SP - 2957
EP - 2960
BT - 2006 IEEE International Conference on Image Processing, ICIP 2006 - Proceedings
T2 - 2006 IEEE International Conference on Image Processing, ICIP 2006
Y2 - 8 October 2006 through 11 October 2006
ER -