Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...
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Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...

Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ... Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...

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18 OPTOINFORMATICS’05 (a) (b) (c) Figure 1: (a) The original image. (b) Image (a) processed by the conventional contrast-stretching method. (c) Image (a) processed by our method. (a) (b) (c) Figure 2: (a)-(c) are histograms ong>ofong> Figure 1(a)-(c) respectively Table 1: Statistical data ong>ofong> Figure 1(a)-(c) respectively Figure 1(a) Figure 1(b) Figure 1(c) Minimum 1 2 0 Maximum 255 255 255 Mean 64.23 102.23 101.79 Standard deviation 58.64 59.13 65.72 1. Ching Chung Yang. Improving the sharpness ong>ofong> an image with non-uniform illumination. Optics and Laser Technology. 2005. vol. 37. p. 235. 2. Ching Chung Yang. Image enhancement by modified contrast-stretching manipulation. Optics and Laser Technology. in press. 3. Eugene Hecht. Optics. 2nd ed. Massachusetts: Addison-Wesley; 1987. p. 507.

SAINT-PETERSBURG, October 17 – 20, 2005 19 FOTOBIOFTAL-1: A DATA ACQUISITION, PROCESSING AND STORAGE SYSTEM FOR AN OPHTHALMIC INSTRUMENT S. Miclos, M. Mustata, D. Savastru, C. Cotirlan, T. Brezeanu, E. Ristici, A. Stefanescu-Dima* National Institute ong>ofong> R&D for Optoelectronics * Bucharest Clinical Eye Hospital E-mail: esong>ofong>ina@inoe.inoe.ro Fotobiong>ofong>tal-1 system is an instrument containing an optical stereomicroscope and a data acquisition, processing and storage system. Using EPCO 2000 song>ofong>tware, the obtained information leads to optimal treatments for different diseases in the ophthalmologic therapies. In this paper we have followed data acquisition on eye crystalline lens. If the aspect ong>ofong> the crystalline lens may be put into evidence by a noninvasive optical device, then the obtained results lead to the possibility for opening the necessary investigations and therapies [1,2,3] using a correct technique that can prevent the developing ong>ofong> the diseases (opacity). One ong>ofong> the medical therapies is based on laser [4] . It is a surgical operation that can be done also in clinics and ambulatory. Fotobiong>ofong>tal-1 is a noninvasive instrument based on a stereomicroscope combined with a data acquisition, processing and storage system (containing CCD camera and PC computer). The real time images allow knowing the grade ong>ofong> evolution ong>ofong> the disease and regarding ong>ofong> it, the ophthalmologist may get a real conclusion on the therapy which must be used. The experimental set–up is a useful combination between a stereomicroscope and an image acquisition system. The data acquisition, processing and storage system allows to get real time images and these images may be used during a long period ong>ofong> observation ong>ofong> the patients. The device comprises a digital photo camera attached by an adaptor to a stereomicroscope in a lateral region, a PC or a note-book with USB interface and also the song>ofong>tware. A schematic ong>ofong> the medical process is presented in Fig.1. Adaptor module for digital camera DIGITAL CCD camera PC or NOTE-BOOK P A C I E N T Ophthalmic stereomicroscope ophthalmologist diagnostic data base imaging Fig. 1. Schematic ong>ofong> data acquisition, processing and storage system ong>ofong> Fotobiong>ofong>tal-1 The operating mode ong>ofong> the data system consists in obtaining ong>ofong> the images from the visual plane in order to transmit them through the adaptor digital CCD camera that will transmit the image to PC or note-book through the USB interface.

18 OPTOINFORMATICS’05<br />

(a) (b) (c)<br />

Figure 1: (a) The original image. (b) Image (a) processed by the c<strong>on</strong>venti<strong>on</strong>al c<strong>on</strong>trast-stretching<br />

method. (c) Image (a) processed by our method.<br />

(a) (b) (c)<br />

Figure 2: (a)-(c) are histograms <str<strong>on</strong>g>of</str<strong>on</strong>g> Figure 1(a)-(c) respectively<br />

Table 1: Statistical data <str<strong>on</strong>g>of</str<strong>on</strong>g> Figure 1(a)-(c) respectively<br />

Figure 1(a) Figure 1(b) Figure 1(c)<br />

Minimum 1 2 0<br />

Maximum 255 255 255<br />

Mean 64.23 102.23 101.79<br />

Standard deviati<strong>on</strong> 58.64 59.13 65.72<br />

1. Ching Chung Yang. Improving the sharpness <str<strong>on</strong>g>of</str<strong>on</strong>g> an image with n<strong>on</strong>-uniform<br />

illuminati<strong>on</strong>. Optics and Laser Technology. 2005. vol. 37. p. 235.<br />

2. Ching Chung Yang. Image enhancement by modified c<strong>on</strong>trast-stretching manipulati<strong>on</strong>.<br />

Optics and Laser Technology. in press.<br />

3. Eugene Hecht. Optics. 2nd ed. Massachusetts: Addis<strong>on</strong>-Wesley; 1987. p. 507.

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