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Vinoth, M.
- Multiresolution Satellite Image Segmented Using Discrete Wavelet Transform
Authors
1 Department of Electronics and Communication Engineering, V.R.S College of Engineering and Technology, Villupuram, IN
Source
Digital Image Processing, Vol 5, No 9 (2013), Pagination: 448-452Abstract
Satellite images are being used in many fields of research. One of the major issues of these types of images is their resolution. In this paper, propose a new satellite image multi resolution enhancement technique based on the interpolation of the high-frequency sub bands obtained by discrete wavelet transform and the input image. The proposing multi resolution enhancement technique uses discrete wavelet transform to decompose the input image into different sub bands. Then, the high-frequency sub band images and the input low-resolution image have been interpolated, followed by combining all these images to generate a new resolution-enhanced image by using inverse discrete wavelet transform. In order to achieve a sharper image, an intermediate stage for estimating the high-frequency sub bands has been applied. Segmentation also used in the high resoluteimages (After getting the multi resolution image outputs).Keywords
Discrete Wavelet Transforms (DWT), Interpolation, Satellite Image Resolution Enhancement, Image Segmentation.
- Channel Modelling and Performance Characterization of Underwater Visible Light Communication
Authors
1 Department of Electrical and Electronics Engineering, Tamilnadu College of Engineering, Karumathampatti, Coimbatore-641659, Tamilnadu, IN
Source
Digital Image Processing, Vol 11, No 3 (2019), Pagination: 54-57Abstract
Now a days, Data transmission without using any network is very tedious job to do. In our project, data and audio is transmitted and received through visible lights and control the devices. The data is generated by microcontroller (tx) then transmitted through LED, these data can be received by photo detector and displayed on microcontroller. It is an advanced technology and the accuracy is more. Here, data communication, controlling the devices and as well as transmission of audio through visible light is achieved. Now a day, Wi-Fi is commonly used technology but the radiations are hazardous for human health so Li-Fi is the one which eliminated the wireless technology like Wi-Fi and transmits the data by using light. The security of transmitting the data is more compare to other technology. In industries, for file transmission and data transmission this technology is very useful because without using any networks one can easily transmit the data through existing light. It is user friendly and is cost effective. This technology is also used to control the devices like bulb, fan etc through visible light so that we can avoid the wastage of electricity. The data rate in this technology is faster than 10Mbps.
References
- Z. Zeng, S. Fu, H. Zhang, y. Dong, and J. Cheng, “A survey of underwater optical wireless communications,” IEEE Commun. Surveys Tuts, vol. 19, no. 1, pp. 204-238, Mar.2017.
- M. Kong, W. Lv, T. Ali, R. Sarwar, C. Yu, Y. Qiu, F. Qu, Z. Xu, J. Han, and J. Xu, “10-m 9.51-Gb/s RGB laser diodes-based WDM underwater Wireless optical communication,” Opt. Express, vol. 25, no. 17, pp.20 829- 20 834, Aug. 2017
- Sonardyne Corporation, “Bluecomn underwater optical communication,” https://www.sonardyne.com/app/uploads/2016/06/BlueComn.pdf, March 6, 2018.
- F. Miramirkhani and M. Uysal, “Visible light communication channel modelling for underwater environments with blocking and shadowing,” IEEE Access, vol. 6, no. 1, pp. 1082-1090, Dec. 2017.