{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T05:59:36Z","timestamp":1769061576481,"version":"3.49.0"},"reference-count":22,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2014,12,15]],"date-time":"2014-12-15T00:00:00Z","timestamp":1418601600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61204063"],"award-info":[{"award-number":["61204063"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Kongque Technology Innovation Foundation of Shenzhen","award":["KQCX20120807153227588"],"award-info":[{"award-number":["KQCX20120807153227588"]}]},{"name":"Fundamental Research Foundation of Shenzhen","award":["JCYJ20140418095735624"],"award-info":[{"award-number":["JCYJ20140418095735624"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, a novel analog gamma correction scheme with a logarithmic image sensor dedicated to minimize the quantization noise of the high dynamic applications is presented. The proposed implementation exploits a non-linear voltage-controlled-oscillator (VCO) based analog-to-digital converter (ADC) to perform the gamma correction during the analog-to-digital conversion. As a result, the quantization noise does not increase while the same high dynamic range of logarithmic image sensor is preserved. Moreover, by combining the gamma correction with the analog-to-digital conversion, the silicon area and overall power consumption can be greatly reduced. The proposed gamma correction scheme is validated by the reported simulation results and the experimental results measured for our designed test structure, which is fabricated with 0.35 \u03bcm standard complementary-metal-oxide-semiconductor (CMOS) process.<\/jats:p>","DOI":"10.3390\/s141224132","type":"journal-article","created":{"date-parts":[[2014,12,15]],"date-time":"2014-12-15T10:25:19Z","timestamp":1418639119000},"page":"24132-24145","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["An Analog Gamma Correction Scheme for High Dynamic Range CMOS Logarithmic Image Sensors"],"prefix":"10.3390","volume":"14","author":[{"given":"Yuan","family":"Cao","sequence":"first","affiliation":[{"name":"College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofang","family":"Pan","sequence":"additional","affiliation":[{"name":"Department of Electronic and Computer Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9965-3516","authenticated-orcid":false,"given":"Xiaojin","family":"Zhao","sequence":"additional","affiliation":[{"name":"College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huisi","family":"Wu","sequence":"additional","affiliation":[{"name":"College of Computer Science and Software Engineering, Shenzhen University, Shenzhen 518060, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2014,12,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"318","DOI":"10.1109\/JSSC.2012.2214851","article-title":"CMOS Image Sensor with Per-Column \u03a3\u0394 ADC and Programmable Compressed Sensing","volume":"48","author":"Oike","year":"2014","journal-title":"IEEE J. Solid State Circuits"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1109\/JSEN.2006.888058","article-title":"A wide-dynamic-range CMOS image sensor based on multiple short exposure-time readout with multiple-resolution column-parallel ADC","volume":"7","author":"Sasaki","year":"2007","journal-title":"IEEE Sens. J."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1108","DOI":"10.1109\/TED.2011.2106787","article-title":"Linear-Logarithmic CMOS Pixel With Tunable Dynamic Range","volume":"58","author":"Vatteroni","year":"2011","journal-title":"IEEE Trans. Electron. Devices"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1109\/TED.2002.807258","article-title":"CMOS imaging for automotive applications","volume":"50","author":"Hosticka","year":"2003","journal-title":"IEEE Trans. Electron. Devices"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Akahane, N., Ryuzaki, R., Adachi, S., Mizobuchi, K., and Sugawa, S. (2006, January 6\u20139). A 200 dB Dynamic Range Iris-less CMOS Image Sensor with Lateral Overflow Integration Capacitor using Hybrid Voltage and Current Readout Operation. San Francisco, CA, USA.","DOI":"10.1109\/ISSCC.2006.1696161"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"950","DOI":"10.1109\/JSEN.2006.877983","article-title":"An electronic-calibration scheme for logarithmic CMOS pixels","volume":"6","author":"Choubey","year":"2006","journal-title":"IEEE Sens. J."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1109\/JSEN.2003.820339","article-title":"A novel logarithmic response CMOS image sensor with high output voltage swing and in-pixel fixed-pattern noise reduction","volume":"4","author":"Lai","year":"2004","journal-title":"IEEE Sens. J."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1109\/TCE.1981.273525","article-title":"All solid state color camera with single-chip MOS imager","volume":"27","author":"Nabeyama","year":"1981","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1428","DOI":"10.1109\/83.951529","article-title":"Blind inverse gamma correction","volume":"10","author":"Farid","year":"2001","journal-title":"IEEE Trans. Image Process."},{"key":"ref_10","unstructured":"Doustar, M.F., and Hassanpour, H. (2010, January 10\u201313). A locally-adaptive approach for image gamma correction. Kuala Lumpur, Malaysia."},{"key":"ref_11","unstructured":"Lucas, B. (1996). Method and Apparatus for Converting Floating-Point Pixel Values to Byte Pixel Values by Table Lookup. (U.S. Patent No.5,528,741 A)."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"474","DOI":"10.1109\/TVLSI.2007.893671","article-title":"A flexible architecture for precise gamma correction","volume":"15","author":"Lee","year":"2007","journal-title":"IEEE Trans. Very Large Scale Integr."},{"key":"ref_13","unstructured":"Kwon, O., Park, K., Lee, D., Lee, K., Jun, S., Kim, C., and Yang, W. (1999, January 26\u201327). A novel double slope analog-to-digital converter for a high-quality 640 \u00d7 480 CMOS imaging system. Seoul, Korea."},{"key":"ref_14","unstructured":"Ham, S., Lee, Y., Jung, W., Lim, S., Yoo, K., Chae, Y., Cho, J., Lee, D., and Han, G. (2006, January 21\u201324). CMOS image sensor with analog gamma correction using nonlinear single-slope ADC. Island of Kos, Greece."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"996","DOI":"10.1109\/TIM.2002.807803","article-title":"Modeling, calibration, and correction of nonlinear illumination dependent fixed pattern noise in logarithmic CMOS image sensors","volume":"51","author":"Joseph","year":"2002","journal-title":"IEEE Trans. Instrum. Meas."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Dierickx, B., Scheffer, D., Meynants, G., Ogiers, W., and Vlummens, J. (1996, January 2\u20137). Random addressable active pixel image sensors, Advanced Focal Plane Arrays and Electronic Cameras. Berlin, Germany.","DOI":"10.1117\/12.262512"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1146","DOI":"10.1109\/4.859503","article-title":"A Logarithmic Response CMOS Image Sensor with On-Chip Calibration","volume":"35","author":"Kavadias","year":"2000","journal-title":"IEEE J. Solid State Circuits"},{"key":"ref_18","unstructured":"Razavi, B. (2001). Design of Analog CMOS Integrated Circuits, McGraw-Hill."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1496","DOI":"10.1016\/j.mejo.2009.08.001","article-title":"A wide dynamic range CMOS image sensor with pulse-frequency-modulation and in-pixel amplification","volume":"40","author":"Chen","year":"2009","journal-title":"Microelectron. J."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"721","DOI":"10.1109\/TCSII.2010.2056110","article-title":"A Subthreshold to Above-Threshold Level Shifter Comprising a Wilson Current Mirror","volume":"57","author":"Lutkemeier","year":"2010","journal-title":"IEEE Trans. Circuits Syst."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"3000","DOI":"10.1109\/TED.2009.2033327","article-title":"Dynamic-Range Widening in a CMOS Image Sensor through Exposure Control over a Dual-Photodiode Pixel","volume":"56","author":"Chun","year":"2009","journal-title":"IEEE Trans. Electron. Devices"},{"key":"ref_22","unstructured":"Hwang, Y., Lee, J., Kim, D., and Song, M. (2012, January 4\u20137). A wide dynamic range CMOS image sensor based on a new gamma correction technique. Jeju Island, Korea."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/14\/12\/24132\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:11:01Z","timestamp":1760217061000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/14\/12\/24132"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,12,15]]},"references-count":22,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2014,12]]}},"alternative-id":["s141224132"],"URL":"https:\/\/doi.org\/10.3390\/s141224132","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,12,15]]}}}