TY - JOUR
T1 - Analog current mode implementation of global and local tone mapping algorithm for WDR image display
AU - Chen, Peng
AU - Murari, Kartikeya
AU - Yadid-Pecht, Orly
N1 - Funding Information:
This work is supported by CMC for Cadence. Authors thank Dr. A. Spivak, Dr. A. Hor? and the lab mates for consultation and advice. Dr. O. Yadid-Pecht and Dr. K. Muarari are supported by iCORE/AITF.P. Chen is supported by NSERC and iCORE/AITF.
Publisher Copyright:
© 2016 Society for Imaging Science and Technology.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Tone mapping algorithms have been utilized to adapt wide dynamic range (WDR) images to limited dynamic range (LDR) displays while still maintaining images’ details. This work presents an analog current mode circuitry approach to realize a tone mapping algorithm that includes both global and local operations in the image array periphery. Compared with the other in-pixel analog implementations, this work can keep the best pixel pitch and fill factor performance of WDR image sensors. In addition, by using joint global and local tone mapping operators, details of the images are preserved and the contrast of the image is also enhanced when compared with other hardware implementations realizing only one of these operators. In this work, a novel WDR analog divider is designed and presented to handle the WDR input pixel value. The circuit, designed in a TSMC 0.35 µm complementary metal oxide semiconductor (CMOS) technology, was simulated with thirty WDR images in order to evaluate our implementation. Peak signal to noise ratio (PSNR) and structural similarity (SSIM) scores were calculated to evaluate the hardware simulation and compared to a software implementation in MATLAB.
AB - Tone mapping algorithms have been utilized to adapt wide dynamic range (WDR) images to limited dynamic range (LDR) displays while still maintaining images’ details. This work presents an analog current mode circuitry approach to realize a tone mapping algorithm that includes both global and local operations in the image array periphery. Compared with the other in-pixel analog implementations, this work can keep the best pixel pitch and fill factor performance of WDR image sensors. In addition, by using joint global and local tone mapping operators, details of the images are preserved and the contrast of the image is also enhanced when compared with other hardware implementations realizing only one of these operators. In this work, a novel WDR analog divider is designed and presented to handle the WDR input pixel value. The circuit, designed in a TSMC 0.35 µm complementary metal oxide semiconductor (CMOS) technology, was simulated with thirty WDR images in order to evaluate our implementation. Peak signal to noise ratio (PSNR) and structural similarity (SSIM) scores were calculated to evaluate the hardware simulation and compared to a software implementation in MATLAB.
UR - http://www.scopus.com/inward/record.url?scp=85046058069&partnerID=8YFLogxK
U2 - 10.2352/ISSN.2470-1173.2016.12.IMSE-262
DO - 10.2352/ISSN.2470-1173.2016.12.IMSE-262
M3 - Conference article
AN - SCOPUS:85046058069
JO - IS and T International Symposium on Electronic Imaging Science and Technology
JF - IS and T International Symposium on Electronic Imaging Science and Technology
SN - 2470-1173
T2 - Image Sensors and Imaging Systems 2016
Y2 - 14 February 2016 through 18 February 2016
ER -