A hardware implementation of Craik-O’Brien effect-based contrast improvement for dichromats

Tomohiro Ono; Ryosuke Kubota; Noriaki Suetake; Hakaru Tamukoh

doi:10.1117/12.2521580

27 March 2019 A hardware implementation of Craik-O’Brien effect-based contrast improvement for dichromats

Tomohiro Ono, Ryosuke Kubota, Noriaki Suetake, Hakaru Tamukoh

Proceedings Volume 11050, International Forum on Medical Imaging in Asia 2019; 110500G (2019) https://doi.org/10.1117/12.2521580
Event: 2019 Joint International Workshop on Advanced Image Technology (IWAIT) and International Forum on Medical Imaging in Asia (IFMIA), 2019, Singapore, Singapore

Abstract

In this study, we designed a digital hardware circuit for a field-programmable gate array (FPGA) to provide an effective contrast improvement algorithm for dichromats. The proposed method employs the Craik-O ’Brien (C-O) effect. The C-O effect is an optical illusion effect in which subjective contrast is created from contour information. In the proposed method, the contrast modification is only conducted around the contours of objects to apply the C-O effect for dichromats. To extract the contour information of objects, a T-model filter which only requires a one-line buffer is introduced. The proposed method can realize the C-O effect without using dividers and multipliers. Therefore, it is relatively simple to implement in the FPGA. Through experiments with software and logic simulation, the effectiveness and validity of the proposed method were evaluated.

Citation Download Citation

Tomohiro Ono, Ryosuke Kubota, Noriaki Suetake, and Hakaru Tamukoh "A hardware implementation of Craik-O’Brien effect-based contrast improvement for dichromats", Proc. SPIE 11050, International Forum on Medical Imaging in Asia 2019, 110500G (27 March 2019); https://doi.org/10.1117/12.2521580

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