舌診影像擷取環境控制之研究; Research on Environmental Control of Taking Picture for the Tongue Diagnosis

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Title:	舌診影像擷取環境控制之研究;Research on Environmental Control of Taking Picture for the Tongue Diagnosis
Authors:	井口圭子;Inokuchi Keiko
Contributors:	中國醫藥學院中國醫學研究所
Date:	1991
Issue Date:	2009-12-03 09:34:45 (UTC+8)
Abstract:	為了獲得最真實的舌像影像而做正確的舌診判斷，環境控制是很重要，本項研究之主要的目的是制訂出最理想之舌診影像擷取環境。試圖透過燈光的位置和曝光之設定、燈光的色溫和亮度之穩定度、相機的曝光的安定度、伸舌姿勢和伸舌角度及長度的關係等研究來改良舌診儀器的攝影環境。本研究所使用的舌診儀器方面，相機為Nikon E2數位相機，燈光為Kaiser RB 5000標準色溫冷光燈光組，鏡頭保護鏡為B+W UV 010濾色片，以Gossen colormaster 3F色溫表測量色溫和亮度，並使用灰板校正，舌診攝影工作在黑幕攝影棚內進行。本研究在燈光的位置和曝光之設定方面：不同燈光放置位置和燈管數及不同光圈和快門搭配下擷取舌診影像。上述各條件下拍攝3人的舌象，然後由6年以上經驗的中醫師來判斷何者所取得之舌診影像最理想而不失真。燈光色溫和亮度之穩定度方面：將色溫表放置於舌診檢查儀頭部固定架上舌頭伸出位置，以測量色溫和亮度之數值。相機曝光值之穩定度方面：共以灰版作為設定曝光值之依據，可得到正確的曝光。再以此光圈和快門之曝光值，對灰版作曝光偵測。伸舌姿勢和伸舌角度和伸舌長度的關係方面：從側面擷取以31名自願者為對象，將頭固定在舌診檢查台上，每位受試者在稍微伸舌、自然伸舌、用力伸舌等三個條件下之舌診影像，這些影像經過電腦列印之後測量其角度和長度。研究結果發現：最好的燈光和曝光的設定為4支燈光（左右各2支），燈光和檢查台前面之間的距離定為20㎝（頭部固定架和燈光中間的距離定為34㎝），曝光值之光圈定為f9.5、快門1/90sec（EV13），而0～20分鐘之內每分鐘的相機曝光值是安定的。燈光方面色溫1分鐘之後、亮度1分40秒之後會穩定，而至2小時後的色溫和亮度仍是穩定的。伸舌姿勢方面自然伸舌時平均角度為34度、長度為2.3㎝，因此建議燈光設定; 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°.
Appears in Collections:	[Graduate Institute of Chinese Medical Science] Theses & dissertations

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