設定為光圈 f9.5、快門 1/90 sec（EV13）時，都是呈現為「曝光量適當」，
因此可說明 Nikon E2 數位相機的曝光量是穩定的。不過為了避免曝光量
參考文獻
18. 國立中山大學舌診系統介紹，2000 年衛生署中醫藥委員會主辦舌診 系統標準化研訂研討會議資料 2000:18~25.
19. 目前國內已建立舌診系統介紹，2000 年衛生署中醫藥委員會主辦舌 診系統標準化研訂研討會議資料 2000:48~49.
20. 太田昭雄、河原英介著，王建柱等校訂：色彩與配色，北星圖書公司，
永和 1991:9~11,17~18,57~63.
21. 劉 華 茂 教 訂 ， Guyton，s 著 ： 蓋 氏 生 理 學 ， 杏 文 出 版 社 ， 台 北 1987:1629~1706.
22. 張豐榮編著：快門曝光閃光燈，冠倫文化事業有限公司，1994:42~43.
23. 宗汝濬 APSC 著：攝影學，藝術圖書公司，台北 1993:10~11,65~69.
24. 張豐榮編著：快門曝光閃光燈，冠倫文化事業有限公司，1994:66~72
附錄一
燈光位置之設定─舌診影像範例
2 支燈光 4 支燈光
0 cm 0 cm
5 cm 5 cm
10 cm 10 cm
2 支燈光 4 支燈光
15 cm 15 cm
20 cm 20 cm
25 cm 25 cm
2 支燈光 4 支燈光
30 cm 30 cm
35 cm 35 cm
40 cm 40 cm
2 支燈光 4 支燈光
45 cm 45 cm
50 cm 50 cm
附錄二
燈光和曝光條件之設定─舌診影像範例
15 cm 2 支燈光 f8 1/60sec 15 cm 4 支燈光 f8 1/125sec
15 cm 2 支燈光 f9.5 1/60sec 15 cm 4 支燈光 f11 1/60sec
20 cm 2 支燈光 f8 1/60sec 20 cm 4 支燈光 f8 1/125sec
20 cm 4 支燈光 f9.5 1/90sec 20 cm 4 支燈光 f11 1/60sec
25 cm 2 支燈光 f8 1/60sec 25 cm 4 支燈光 f8 1/125sec
25 cm 4 支燈光 f9.5 1/90sec 25 cm 4 支燈光 f11 1/60sec
30 cm 2 支燈光 f8 1/60sec 30 cm 4 支燈光 f8 1/125sec
30 cm 4 支燈光 f9.5 1/90sec 30 cm 4 支燈光 f11 1/60sec
Research on Environmental Control of Taking Picture for the Tongue Diagnosis
Abstract
Environmental control is significant to gain the most actual images of tongue for the accurate judgment of tongue diagnosis. This research aims at setting up the most ideal environment for taking picture of tongue images.
Consequently, attempts to improve the environment of photography for tongue diagnosis instruments depend on the position of light, exposure setup, stability of color temperature and brightness, stability of camera exposure and relationship between the posture and angle and length of tongue protrusion.
In tongue diagnosis instruments for the research, we used Nikon E2 digital camera, Kaiser RB 5000 standard color temperature & luminescence light set, B+W UV 010 filter as lens skylight, Gossen colormaster 3F table of color temperature to measure the color temperature and brightness and gray card for correction. Picture taking for tongue diagnosis was performed in the dark room.
In position of light and exposure setup, the picture taking of tongue diagnosis was performed under conditions highlighting a coordination of the different light position and light numbers with different aperture and shutter. Images of tongues for three volunteers under the aforementioned conditions were taken and then diagnosed by those Chinese medical doctors with at least 6 years of practice to decide the most ideal images. In the stability of color temperature and brightness of light: placed the table of color
temperature on the head fixed stand of tongue diagnosis instruments where features the position of tongue protrusion to measure the color temperature and brightness values. In stability of exposure value: gray board was worked as the basis for the setup of exposure value to thus get the accurate exposure, followed by a exposure test on gray board based on the exposure value of aperture and shutter. In relationship between the posture and
angle and length of tongue protrusion: tongue images of slight tongue protrusion, natural protrusion and tongue being forced protrusive were taken from 31 volunteers who had their tongue placed fixed on the examining table. These images were measured the angle and length of tongue protrusion by computer image.
The findings imply that: 4 lights as the best setup for light and exposure (two lights for each right and left side), a distance of 20 cm set between the light and front of examining table (a distance of 34 cm exists between the head fixed stand and the light), f9.5 as the aperture of exposure value, 1/90 as the shutter (EV13) and a stable camera exposure value per minute in 0~20 minutes. A stability for the color temperature and brightness after 1 minute and 1 minute and 40 seconds respectively is visible, both showing stability after two hours. In posture of tongue protrusion, the average angle is 34°and the length is 2.3 cm for a natural protrusion. It is suggested to change the setup angle for light to 34°.