1250310 玖、發明說明： 【發明所屬之技術領域】 本發明係關於一種肉眼辨識低亮度對比影像之輔助系 統及其方法，尤指一種利用肉眼的亮度對比靈敏度與空間 頻率、光源亮度/顏色之關係，使肉眼更易於辨識影像/ 圖形品質、缺陷之技術。 【先前技術】 由於市場、良率與產量等因素的同步提升，使液晶〆 電毁等平面顯示器已逐漸取代陰極射線管式螢幕。一般而 言，平面顯示器的製造技術與成本高，其出廠前的品管要 求亦相對較高。對於平面顯示器而言，如黑點（blacK spot)、白點（WHITE SP0T)、整片白塊（wh|te b〇rder BLOOM)、刮線（RUBBING LINES)、及晝面上的不均勻現 象專，均將視為不良品，稱為Mura。由於Mura涉及影像 的亮度對比度過低及具有方向性等問題，故無法採取自動 檢測，而必須利用人工以肉眼進行檢測。即使如此，人工 檢測仍然存在一些問題，癥結在於當待測影像的對比度過 低時，依靠肉眼並不容易檢測出影像瑕疵；而肉眼檢測的 另一個問題是缺乏客觀標準，在肉眼可辨識與不可辨識之 間存在一段模糊地帶，對於供應商與客戶間，前述的模糊 地帶常造成品質認定上的落差。歸根究底，造成前述辨識 杈糊地帶的主要原因乃在於肉眼對於低亮度對比影像的辨 識極限，其與視神經細胞（Gang|i〇n ce丨丨）對影像的感應方 1250310 2有關’所幸人眼對於物體的空間頻率辨認的靈敏度不同（ =間頻率為目標物大小之倒數，物體越大，對應的空間頻 率越小，物體越小，對應的空間頻率越大），如第五圖所示 、水平座標為空間頻率，單位是每度（圓周為度）多少 垂直座標為眼靈敏度。此圖為視覺心理學常引用之 數據。圖中顯示在某一特定範圍之空間頻率時（通常為每 ^ 〇週期），人眼的靈敏度最高，此一特定頻率，也 與目標物如顯示器之亮度與顏色波長有關。換句話說，如 :體在人眼所成的影像，t周整至此大+，則a眼對低亮 二對比影像的辨認最強，也較易分辨具有瑕疵影像的顯示 益，而易確認，以減少爭議。 此特疋空間頻率，與人眼視覺分辨亮度對比的方式 =第/、圖A、B所不，是視神經細胞對於感應影像 弱的π思圖’如第六圖A所示，其中央為一加強區（7 ^ ) ’周圍則為抑制區（7 i )，該加㈣（7 ◦)與抑 ’ £ ( 7 1 ) t感應靈敏度適對應於第六圖B所示的曲線 當肉眼觀看-線條時，視神經細胞感應到的是一連串 二排的感應區域（如第七圖左側所示），等同於第七圖右 側所示的感應區域’位於中央的是條狀的加龍（7〇，） ，其兩側則為亦呈條狀的抑制區（ 、/ 1 )，刖述加強區（ 7 0 )與抑制區（7丄，）的寬 圍有關，故為—定寬度。在又y視神經細胞感應範 見度在此狀況下，當以肉眼辨識影像 的凴度對比狀況時，苴能否右4 才/、此否有效的辨識即與空間頻率的高 1250310 低存在很大的關聯性，如第八圖分別揭示影像在不同的空 間頻率時（亦即不同大小時）與視神經細胞感應區域的相 對關係。f先如第八圖A所示，當影像的空間頻率與視神 經細胞的感應頻率相同時，即感應區域的加強@ ( 7、〇，） 剛好落在影像的亮線上，其抑制區（7 i，）也剛好落在影 像的暗線）上’在此狀況下，視神經細胞對於該影像的靈 敏度最高。又如第八圖B、c所*，分別揭示影像的空間 頻率大於或小於視神經細胞感應最靈敏頻率的關係圖，由 於，應區域的加強區、抑制區與影像的亮線與暗線錯開或 重®，在此狀況下，肉眼的對比靈敏度即相對偏低。 由上述可明顯看出，肉眼的對比靈敏度相對於影像的 空間頻率存在極大的關聯’故如欲在低亮度對比的狀況下 提升肉眼對於影像品質的辨識能力，即必須將影像的空 間頻率納入作為考量重點。 【發明内容】 因此，本發明主要目的在提供一種輔助系統，其利用 肉眼的亮度對比靈敏度與影像空間頻率之關係，調節待測 影像/圖形在眼中之空間頻率，以便更易於辨識出低亮度 對比影像/圖形之品質及缺陷。 為達成前述目的採取的主要技術手段係令前述輔助系 統至少包括： μ 一光學鏡片，係位於檢測者肉眼與待測物影像之間； 一驅動機構，係供調整光學鏡片與待測物影像之距離 l25〇3l〇 以调即光學鏡片相對於待測物影像的縮放倍率； :用前述架構，可透過調整待測物影像：空 眼對於低亮度對比待測物影像之辨識靈敏度 則述輔助系統進一步包括有一控 動機構，以作為控制中樞。 早-，其與前述驅 ]述輔助系統進一步包括有一資料 測物影像之預設空間頻率值，其與控制單元=存不同待 控制驅動機構之依據。 供作為 前述辅助系統進一步包括有： 一半反射鏡（半反射半穿透） 待測物的相對位置上； 併、以一特定距離設於 一影像擷取裝置，苴取傻自厗 向待測物； '、角度係經由前述半反射鏡朝 精此，可由影像擷取裝置經由半反 攝待测物影像之畫面，並送至控制單元 ^^拍 預設空間頻率值比較，#由控制單元"=中儲存的 學鏡片’以調整至預設的空間頻:=機構升降光 反射鏡-適當距離’透過反射鏡觀看待測 測物影像已經過空間頻率調* / 、个 對比靈敏度進行影像辨識，以有效肉眼以最佳的 。 ，效知升影像辨識的準確性 前述影像擷取裝置兼具量測 控制單元進—牛愈一古由』…什冽衫像党度之功能，又 像之亮度。 連^，以控制待測物影 1250310 前述亮度調節妒+ i 器内。 P4置了為内建於產生待測物影像之顯示 置内 耵述亮度調節裝置可為内建於待測物影像 的背光源裝 儿：凋即爰置可為設於-外部光源内，該外邱 源係投射於光反射式顯示器的晝面上。 。先 本發明次一目的尤 影像辨識度的方法k供一種可提升肉眼對低亮度對比 為達成θ述目的係令前述方法包括下列步驟： 令㈣者肉眼相對待測物影像一設定距離. 像的=:定…’量測檢測者肉眼相對於待測物影 對頻率非最適空間頻率時，即調節檢測者相 最佳狀態； 門頻率’而使肉眼的對比靈敏度達到 才双測者肉眼判斷待測你旦彡 他品質問題； ]物衫像疋否出現不均句現象或其 利用刖述叹汁，可使檢測者在肉眼對比靈敏度最佳的 狀恶下對待測物影像進行辨識，以有效提高辨識的準確度 4方法可進-步在量測空間頻率後，令量測空間頻 '、-貧料庫預存的空間頻率資料進行比較，如運算空間 ，預設空間頻率不同時，即調節檢測者相對於待測物 衫像之空間頻率’而使肉眼的對比靈敏度達到最佳狀態。 1250310 頻率：述方法經調節檢測者肉眼相對於待測物影像的空間 ，可利用肉眼對比靈敏度與特定波長 度的關係，改變待洌物與n w… 先原強 、 文行而物衫像月光源、（或反射光）的強弱、 ☆ ’以進一步提升肉眼的對比靈敏度。 …前述方法於量測待測物影像的空間頻率時，可同時旦 =測物影像的亮度’以作為是否調節影像背光源（ 射光）強度之依據。 。月丨』述影像之背光源顏色或背景較佳者通常為、綠色，亦 可以針對特定待測物做實驗獲得。 前述待測物影像可為平面顯示器的晝面影像。 前述待測物影像可為X-光片。 前述待測物影像可為電路板上之線路圖案。 【實施方式】 有關本發明一較佳實施例之系統架構，請參閱第一圖 所示，其至少包括有： ° 為透鏡（凹透鏡、凸透鏡 頭等，而位於檢測者肉眼 一光學鏡片（30)，其可 )、鏡片組、光學鏡頭或變焦鏡 與待測物影像之間； 一驅動機構（圖中未示），係與前述光學鏡片（3 〇 )連結’供調整光學鏡片㈡G )與待測物影像之距離或 焦距（如變焦鏡頭），以調節光學鏡片相對於待測物影像 的縮放倍率； 在前述系統架構下，檢測者可透過光學鏡片（3 〇 ) 1250310 、肉艮觀察待測物影像，其檢測方式係先判斷光學鏡 3 0 ),原始位置時，待測物影像在肉眼的成像大小是否 易於辨識’如辨識不易則透過驅動機構移動光學鏡片（3 0 )，以調整待測物影像之空間頻率，使待測物影像在 眼中之成像為最適大小’以提高肉眼對於低亮度對比待測 物影像之辨識靈敏度。 、 /又本發明在前述架構下，可進一步擴充為自動化辅助 糸統，如第二圖所示，其包括有： 半反射鏡（1 〇 )，係以一特定距離設於待測物的 相對位置上’-半光反射’供檢測者觀測；一半光穿透， 供一影像操取裝置（如數位相機）做自動化處理； 此-半反射鏡（10)，亦可為一可轉動之全反射鏡 ，、當與待測物方向& 45度角時，供檢測者觀測；當轉動 成90度角時，供影像擷取裝置拍攝； -影㈣取裝置（2〇)，係設於半反射鏡（1〇) 上方以經由半反射鏡（丄〇 )擷取待測物（1 〇 〇 )之 影像； 光學鏡片（3 0) ’係位於半反射鏡（丄〇 )與待 測物之間，並利用一驅_ (圖中未示）調整該光學鏡 片（3 0)與半反射鏡（10)及待測物（ι〇〇)之距 離’以調節經由光學鏡片（3Q)投射在半反射鏡（1〇 )上的待測物（100)影像縮放倍率；該光學鏡片（3 〇)可為-透鏡（凹透鏡或凸透鏡）、鏡片組、光學鏡頭 或變焦鏡頭； 10 1250310 在珂述系統架構下，係令檢測者相對於半反射鏡（1 0) ’其距離和影像擷取裝置（2〇)相對於半反射q 1 0)的距離有關，意即檢測者肉眼與影像擷取裝置（2 〇)分別由半反射鏡（10)上擷取影像的空間頻率岸屬 相同。藉此，當影像擷取震置（2 0 )經由半反射鏡（丄 〇 )、光學鏡片（3 0 )拍攝待測物（丄〇 〇 )之影像（ 例如平面顯示器的影像畫面），經量測其空間頻率後如非 最佳值，即控制驅動機構調整光學鏡片（3 〇 )相對待測 物（1 0 0 )的距離，以調整其縮放比例，在此狀況下， 投射在半反射#( ! 〇 )上的影像空間頻率將隨之改變， 並調整至適切的空間頻率，以便使檢測者肉眼以最佳的對 比靈敏度觀測。至於前述光學鏡丨（3G)的縮放比例， 係透過-控制單元配合一資料庫以達成，#系統架構如第 三圖所示，包括： 資料庫（4 〇 )，係彳諸存各種不同待測物之影像/ 圖形的預設最佳空間頻率值； 一控制單元（5 0 )，係分別與影像擷取裝置（2 〇 )、光學鏡片之驅動機構（6 0 )及資料庫（4 〇 )連接 ，以作為控制中樞。 藉此，當影像擷取裝置（2 〇 )擷取到待測物的影像 亚計算其空間頻率後，將送至控制單元（5 0 )與資料庫 (4 0 )中儲存的預設空間頻率值比較，再由控制單元（ 5 〇 )控制驅動機構（6 〇 )升降光學鏡片（3 〇 )，以 凋整其對影像的縮放比例，並達預設的空間頻率，藉此， 1250310 檢測者肉眼即可透過半反射鏡（1 ο)以最適當的對比靈 敏度觀測待測物之影像，並可因而有效提升影像辨識的準 確性。 除η周t待測物影像之空間頻率外，可進一步配合肉眼 對比靈敏度與待測物影像亮度、顏色之關係，對待測物影 像免度、顏色作進一步之調整，使檢測者之肉眼辨識度得 以進步提升’如第四圖所示，揭示有光源波長與肉眼對 比莖敏度之關係曲線圖，顯示肉眼對於波長為550nm ( nano_meter)的光源具有最佳的對比靈敏度，而前述波長 之光源係綠色光。因此，如欲進一步提升肉眼檢測低亮度 對比影像之對比靈敏度時，即將待測物之相關光源調整為 綠色。 如待測物為平面顯示器，即令其產生綠色背景之影像 又如本發明運用於光反射式顯示器的影像檢測，係令 杈射於光反射式顯示器上的外部光源為綠色光源。 如本發明運用於分析x_光片，料x_光片的背光源 改為綠色光。 一至於經由調整亮度以提升肉眼對比靈敏度之方式，係 令前述影像擁取裝置（20)兼具量測待測像亮度之功能 ’並於資料庫（4 0 )預存各種待測物之最佳亮度值，而 透過控制單元（5〇)肖量測值進行比較，而該控制單元 5二）進一步與一亮度調節裝置（51)連結，以根據 U，調整待測物之影像亮度。由於本發明可運用於 12 1250310 檢測各種低亮度對比影像 片、晶圓岡垒c 4双，則，例如平面顯示器、X -光 曰曰0圖案、印刷電路板 置（5 1 )之實施能样介 ）# ’故刚述亮度調整裝 -待、則Μ 隨不同待測物而有所差異： )係内#於兮y日 °夺，刖述亮度調節裝置（5 1 你内建於邊液晶顯示器内。 當待測物為光反射式s ' ”、、員不為時，前述亮度調節裝置（ ^1)係设於一外部光源内。 當待測物為X -光片拄 内建 守，則述焭度調節裝置（5 1 )係 内建於X-光片的背光源裝置内。 行實：=述者’僅為該亮度調節装51)之部分可 & #用以限制該亮度調節裝i ( 5 1 )之實 ^怨樣，合先陳明。 本發明雖於資料庫中預設各種待測物影像之空 不目 但每—個檢測者的肉眼對於相同的空間頻率， 見於有相同的斜^ 破度，換5之，透過資料庫調整過 比·：〜像之空間頻率’ $見得符合每-個檢測者的對 :讀度，以，前述光學鏡片的驅動機構仍將允許檢測 度。乂手動方式進行微調，以達到屬於個人最佳的對比靈敏 例物料庫的數據，可由文獻取得，Φ可針對特定待 ，及檢測者實驗獲得。 :有關於預設空間頻率的設定方式，可由下表提供參考 13 1250310 觀看位置 ---—----- 近點(Near point) 15 cm "------ 翌翌竺離 25 cm 符合肉眼最高對比靈敏度之空 間頻率為 5 CYCLE/DEGREE (晝素點大小設為0.3mm) 0_52322 mm(1-2 畫素) —--—---」 0.8722 mm(2_3 晝素） 2.686376 mm(8-9 畫素) 註 翠焦的最短距離 與螢幕大小有關 由上述可知，本發明係利用肉眼對比靈敏度相對於空 間：率的關係’而經由調整檢測者肉眼相對於待測物影： 之空間頻率’使檢測者肉眼得以最佳的對比靈敏度對待測 物之影像進行檢測，其對於低亮度對比影像之檢測工作， 可有效提升其辨識度與準確性。此一技術除應用於各種且 有低亮度對比影像場合的檢測卫作，如各種平面顯示器^ 瑕2檢測、電路板圖形確認、x_光片分析及其他可能出現 低亮度對比之影像或圖开)，另可作為檢測者的肉眼訓練及 延伸作為檢測標準之用。以前述之設計確可有效解決傳統 人工檢測對於低亮度對比度影像之困擾，&已具備突出的 特徵與顯然的進步，並符合發明專利要件，爰依法提起申 請0 τ 【圖式簡單說明】 (一）圖式部分 第一圖：係本發明之一系統示意圖。 第二圖：係本發明又一系統示意圖。 第二圖·係本發明之系統架構方塊圖。 第四圖：係肉眼對比靈敏度相對於光源波長之曲線圖 14 1250310 圖 第五圖：係、肉眼對比靈敏度相對空間頻率之特性曲線 第六圖A、B :係視神經細胞對於感應影像拎 抑 制的示意圖。 9 / 第七圖：係視神經細胞感應一線條之感應區域示意圖 係視神經細胞對影像不同空間頻率 第八圖A〜C 感應效應之示意圖。 (2 0 )影像擷取裝置 (4 0 )資料庫 (5 1 )亮度調整裝置 (1 0 0 )待測物 (一）元件代表符號 (1 0 )半反射鏡 (30)光學鏡片 (5 0 )控制單元 (6 0 )驅動機構 （ (70) ( 7 0，）加強區 (71) ( 7 1，）抑制區1250310 玖, invention description: [Technical field of invention] The present invention relates to an auxiliary system for visually recognizing low-brightness contrast images and a method thereof, and more particularly to a relationship between brightness contrast sensitivity and spatial frequency, light source brightness/color using a naked eye A technology that makes it easier for the naked eye to recognize image/graphic quality and defects. [Prior Art] Due to the simultaneous improvement of factors such as market, yield and output, flat panel displays such as liquid crystal smashing have gradually replaced cathode ray tube screens. In general, the manufacturing technology and cost of flat panel displays are relatively high, and their quality control requirements before leaving the factory are relatively high. For flat-panel displays, such as black spots (blacK spot), white spots (WHITE SP0T), whole white blocks (wh|te b〇rder BLOOM), scratch lines (RUBBING LINES), and unevenness on the surface Specially, they will all be regarded as defective products, called Mura. Since Mura involves problems such as low contrast and directionality of the image, automatic detection cannot be performed, and it is necessary to manually detect it with the naked eye. Even so, there are still some problems in manual testing. The crux of the problem is that when the contrast of the image to be tested is too low, it is not easy to detect the image flaw by the naked eye. Another problem with the naked eye detection is the lack of objective criteria, which are identifiable and invisible to the naked eye. There is a vague area between identification. For the supplier and the customer, the aforementioned fuzzy area often causes a gap in quality certification. In the final analysis, the main reason for the above-mentioned identification of the ambiguous zone lies in the recognition limit of the naked eye for the low-intensity contrast image, which is related to the sensory side of the optic nerve cell (Gang|i〇n ce丨丨) 1250310 2 The eye has different sensitivity to the spatial frequency identification of the object (the inter-frequency is the reciprocal of the target size, the larger the object, the smaller the corresponding spatial frequency, the smaller the object, the larger the corresponding spatial frequency), as shown in the fifth figure. The horizontal coordinate is the spatial frequency, and the unit is the degree of vertical sensitivity per degree (circle is degree). This figure is a data often cited in visual psychology. The figure shows that the sensitivity of the human eye is highest at a certain range of spatial frequencies (usually every ^ 〇 period), and this particular frequency is also related to the brightness of the target such as the display and the wavelength of the color. In other words, if the image formed by the human eye is as large as the t-week, the a-eye has the strongest recognition of the low-bright contrast image, and it is easier to distinguish the display benefit with the 瑕疵 image, and it is easy to confirm, Reduce disputes. The characteristic spatial frequency is compared with the brightness of the human eye to distinguish the brightness = No /, Figure A, B is not, is the π thinking of the optic nerve cell for the sensing image as shown in Figure 6A, the center is one The area around the strengthening zone (7 ^ ) is the suppression zone (7 i ), and the sensitivity of the addition (4) (7 ◦) and the suppression of £ ( 7 1 ) t corresponds to the curve shown in the sixth figure B when viewed by the naked eye - When the lines are lined up, the optic nerve cells sense a series of two rows of sensing areas (as shown on the left side of the seventh picture), which is equivalent to the sensing area shown on the right side of the seventh picture. The central part is the strip of Garonne (7〇, ), on both sides, it is also a strip-shaped suppression zone ( , / 1 ). The reinforcement zone ( 70 ) is related to the wide zone of the suppression zone (7丄,), so it is a fixed width. In the case of y optic nerve cell sensing, in this situation, when the contrast of the image is recognized by the naked eye, whether the right 4 is / or not, the identification is not as high as the spatial frequency of 1250310. The correlation, as shown in the eighth figure, reveals the relative relationship between the images at different spatial frequencies (ie, different sizes) and the optic nerve sensing regions. f First, as shown in Figure 8A, when the spatial frequency of the image is the same as the sensing frequency of the optic nerve cells, the enhancement of the sensing area @(7,〇,) just falls on the bright line of the image, and its suppression zone (7 i ,) also falls on the dark line of the image. 'In this situation, the optic nerve cells are most sensitive to this image. In addition, as shown in the eighth figure B and c, respectively, the spatial frequency of the image is larger or smaller than the most sensitive frequency of the optic nerve cell induction, because the reinforcing region and the suppression region of the region are staggered or heavy with the dark and dark lines of the image. ® In this case, the contrast sensitivity of the naked eye is relatively low. It can be clearly seen from the above that the contrast sensitivity of the naked eye has a great correlation with the spatial frequency of the image. Therefore, if the ability to recognize the image quality of the naked eye is improved under the condition of low brightness contrast, the spatial frequency of the image must be included as Consider the key points. SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide an auxiliary system that utilizes the relationship between the brightness contrast sensitivity of the naked eye and the spatial frequency of the image to adjust the spatial frequency of the image/graphic image to be measured in the eye to make it easier to recognize low brightness contrast. Image/graphic quality and defects. The main technical means for achieving the foregoing objective is that the auxiliary system includes at least: μ an optical lens between the naked eye of the detector and the image of the object to be tested; and a driving mechanism for adjusting the optical lens and the image of the object to be tested. The distance l25〇3l〇 is the magnification of the optical lens relative to the image of the object to be tested; : With the foregoing structure, the image of the object to be tested can be adjusted: the identification sensitivity of the eye to the image of the object to be tested with low brightness is described. Further included is a control mechanism to serve as a control center. As early as the above, the auxiliary system further includes a preset spatial frequency value of the data image, which is different from the control unit=the different driving mechanism to be controlled. The auxiliary system further includes: a half mirror (semi-reflective and semi-transparent) relative position of the object to be tested; and a specific distance is set in an image capturing device to capture the object to be tested ; ', the angle is through the above-mentioned half mirror toward the fine, the image capture device can be half-reverse through the image of the object to be tested, and sent to the control unit ^ ^ shoot the preset spatial frequency value comparison, # by the control unit " ; = stored in the learning lens 'to adjust to the preset spatial frequency: = mechanism lifting light mirror - appropriate distance 'view through the mirror to view the object image has been spatial frequency adjustment * /, a contrast sensitivity for image recognition To be effective with the naked eye to the best. The effect of the image recognition device is as follows: The image capturing device has both the measurement control unit and the "Niuyu Yigu"...when the shirt is like the function of the party, it is like the brightness. Connect ^ to control the object to be measured 1250310 The aforementioned brightness adjustment 妒 + i inside. The P4 is set to be built in the display for generating the image of the object to be tested. The brightness adjusting device can be a backlight device built in the image of the object to be tested: the device can be set in the external light source. The outer source is projected onto the face of the light-reflective display. . Firstly, the method of image recognition of the second object of the present invention is provided for a method for improving the low-brightness comparison of the naked eye to achieve the θ. The method includes the following steps: (4) the human eye is set a distance relative to the image of the object to be tested. =: 定...'Measures the visual eye of the tester relative to the object to be measured against the frequency of the non-optimal spatial frequency, that is, adjusts the optimal state of the detector; the gate frequency' makes the contrast sensitivity of the naked eye reach the double tester. Measure your quality problems;] If the clothes are like 疋 出现 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 或其 , , , , , , , , , , Improve the accuracy of identification 4 method can further measure the spatial frequency of the measurement space frequency, and the spatial frequency data pre-stored in the poor storage library, such as the computing space, when the preset spatial frequency is different, that is, adjust The contrast sensitivity of the naked eye is optimally determined by the detector relative to the spatial frequency of the image of the object to be tested. 1250310 Frequency: The method adjusts the space of the naked eye relative to the image of the object to be tested, and can use the relationship between the sensitivity of the naked eye and the length of the specific wave to change the object to be smear and nw... , (or reflected light) strength, ☆ 'to further enhance the contrast sensitivity of the naked eye. The above method can simultaneously measure the brightness of the object image as the basis for adjusting the intensity of the image backlight (light) when measuring the spatial frequency of the image of the object to be tested. . The backlight color or background of the image of the Moonlight is usually green, and can also be obtained experimentally for a specific object to be tested. The image of the object to be tested may be a face image of a flat panel display. The image of the object to be tested may be an X-ray film. The image of the object to be tested may be a line pattern on the circuit board. [Embodiment] For a system architecture according to a preferred embodiment of the present invention, please refer to the first figure, which includes at least: a lens (a concave lens, a convex lens head, etc., and an optical lens (30) located in the naked eye of the detector) Between the lens group, the optical lens or the zoom lens and the image of the object to be tested; a driving mechanism (not shown) is connected with the optical lens (3 〇) for adjusting the optical lens (2) G) The distance or focal length of the image (such as a zoom lens) to adjust the magnification of the optical lens relative to the image of the object to be tested; under the aforementioned system architecture, the detector can observe the optical lens through the optical lens (3 〇) 1250310 The object image is detected by the optical lens 3 0). When the original position is used, the image size of the object to be tested is easily recognized by the naked eye. If the identification is not easy, the optical lens (3 0 ) is moved through the driving mechanism to adjust the image. The spatial frequency of the image of the object is such that the image of the object to be tested is imaged at an optimum size to improve the sensitivity of the naked eye to the image of the object to be tested with low brightness. And/or the present invention can be further expanded into an automated auxiliary system under the foregoing structure, as shown in the second figure, which includes: a half mirror (1 〇), which is set at a specific distance on the object to be tested. The position '-half-light reflection' is for the observer to observe; half of the light is transmitted for automatic processing by an image manipulation device (such as a digital camera); this semi-reflector (10) can also be a rotatable whole The mirror, for the direction of the object to be tested & 45 degrees, for the observer to observe; when rotated to a 90 degree angle, for the image capture device to shoot; - shadow (four) to take the device (2 〇), is set in Above the half mirror (1〇), the image of the object to be tested (1 〇〇) is taken through the half mirror (丄〇); the optical lens (30) is located in the half mirror (丄〇) and the object to be tested Between the two, the distance between the optical lens (30) and the half mirror (10) and the object to be tested is adjusted by using a drive _ (not shown) to adjust the projection through the optical lens (3Q). The object (100) image magnification on the half mirror (1 〇); the optical lens (3 〇) can be a lens (concave) Mirror or convex lens), lens group, optical lens or zoom lens; 10 1250310 In the system architecture, the detector is relative to the half mirror (1 0)' its distance and image capturing device (2〇) relative to The distance of the semi-reflection q 1 0) is related to the fact that the spatial frequency of the image captured by the half-mirror (10) is the same as that of the image capturing device (2 〇). In this way, when the image captures the vibration (2 0 ), the image of the object to be tested (for example, the image of the flat display) is captured by the half mirror (丄〇) and the optical lens (30). If the spatial frequency is measured as a non-optimal value, the control drive mechanism adjusts the distance of the optical lens (3 〇) relative to the object to be tested (1 0 0 ) to adjust its scaling ratio. In this case, the projection is in the semi-reflection# The image spatial frequency on ( ! 〇) will change and adjust to the appropriate spatial frequency so that the examinee can visually observe the best contrast sensitivity. As for the scaling of the aforementioned optical mirror (3G), the transmission-control unit cooperates with a database to achieve the #system architecture as shown in the third figure, including: the database (4 〇), the system is different The preset optimal spatial frequency value of the image/graphic of the object; a control unit (5 0 ), which is respectively associated with the image capturing device (2 〇), the optical lens driving mechanism (60), and the database (4 〇 ) Connect as a control center. Therefore, when the image capturing device (2 〇) captures the image of the object to be tested and calculates the spatial frequency thereof, it is sent to the preset spatial frequency stored in the control unit (50) and the database (40). The value is compared, and then the control unit (5 〇) controls the drive mechanism (6 〇) to lift the optical lens (3 〇) to reduce its scaling of the image and reach the preset spatial frequency, thereby, 1250310 The naked eye can observe the image of the object to be tested with the most appropriate contrast sensitivity through the half mirror (1 ο), and thus can effectively improve the accuracy of image recognition. In addition to the spatial frequency of the image of the object to be measured at η weeks t, the relationship between the contrast sensitivity of the naked eye and the brightness and color of the image of the object to be tested can be further adjusted, and the degree of freedom and color of the image to be measured are further adjusted to enable the naked eye of the tester to be recognized. As a result of the fourth figure, a graph showing the relationship between the wavelength of the light source and the sensitivity of the naked eye to the naked eye shows that the naked eye has the best contrast sensitivity for a light source with a wavelength of 550 nm (nan_meter), and the light source of the aforementioned wavelength is Green light. Therefore, if you want to further improve the contrast sensitivity of the naked eye detection low brightness contrast image, the relevant light source of the object to be tested is adjusted to green. If the object to be tested is a flat panel display, that is, an image which produces a green background, and the image detection applied to the light reflective display according to the present invention, the external light source that is emitted on the light reflective display is a green light source. As the present invention is applied to the analysis of x-rays, the backlight of the x-ray film is changed to green light. As for adjusting the brightness to improve the contrast sensitivity of the naked eye, the image capturing device (20) has the function of measuring the brightness of the image to be measured, and pre-stores the best of various objects to be tested in the database (40). The brightness value is compared by the control unit (5〇), and the control unit 5) is further coupled with a brightness adjusting device (51) to adjust the image brightness of the object to be tested according to U. Since the present invention can be applied to 12 1250310 to detect various low-brightness contrast video images and wafer barriers, such as a flat panel display, an X-ray 曰曰0 pattern, and a printed circuit board (5 1 ) implementation.介)# ' So just say the brightness adjustment device - to wait, then 随 vary with different objects to be tested:) In the system #于兮y day ° win, describe the brightness adjustment device (5 1 you built in the side LCD In the display. When the object to be tested is light-reflective s ' ”, the brightness adjustment device ( ^1) is set in an external light source. When the object to be tested is built in X-ray film The 调节 degree adjusting device (5 1 ) is built in the backlight device of the X-ray film. The actual: = the part of the brightness adjusting device 51 is only &# used to limit the The brightness adjustment device i ( 5 1 ) is a real sorrow, and the first singer is the same. In the present invention, the image of the various objects to be tested is preset in the database, but the naked eye of each detector is for the same spatial frequency. , See the same oblique ^ breaking degree, change 5, adjust the ratio through the database ·: ~ like the spatial frequency ' $ see each match The pair of detectors: the reading degree, so that the driving mechanism of the aforementioned optical lens will still allow the detection degree. 微 Manually fine-tuning to achieve the data of the personal sensitive comparative sensitive material library, which can be obtained from the literature, Φ can be targeted Specific waiting, and the tester obtained experimentally: There is a setting method about the preset spatial frequency, which can be provided by the following table. 13 1250310 Viewing position ---------- Near point 15 cm "-- ---- 25 25 cm The spatial frequency that meets the highest contrast sensitivity of the naked eye is 5 CYCLE/DEGREE (the pixel size is set to 0.3mm) 0_52322 mm (1-2 pixels) —------” 0.8722 mm (2_3 昼素) 2.686376 mm (8-9 pixels) The shortest distance of the annotation focus is related to the screen size. As can be seen from the above, the present invention uses the relationship between the sensitivity of the naked eye and the space: rate to adjust the detector. The visual direction of the naked eye relative to the object to be measured: the spatial frequency of the detector allows the naked eye to obtain the best contrast sensitivity to detect the image of the object to be measured, which can effectively improve the recognition and accuracy of the low brightness contrast image detection work. This technology is used in a variety of detection and processing applications with low brightness contrast images, such as various flat panel displays, 电路2 detection, board graphic confirmation, x-ray analysis and other images or graphs that may show low brightness contrast. ), as well as the naked eye training and extension of the tester as a test standard. The above design can effectively solve the problem of traditional manual detection for low-brightness contrast images, & has outstanding features and obvious progress, and meets the patent requirements of the invention, and filed an application according to law 0 τ [Simple diagram] a) The first part of the drawing: a schematic diagram of one of the systems of the present invention. Second Figure: A schematic diagram of yet another system of the present invention. The second figure is a block diagram of the system architecture of the present invention. Figure 4: The curve of the contrast sensitivity of the naked eye relative to the wavelength of the light source. Figure 14 1250310 Figure 5: Characteristic curve of the contrast sensitivity versus spatial frequency of the naked eye. Figure 6B: Schematic diagram of the inhibition of the inductive image by the optic nerve cells . 9 / Figure 7: Schematic diagram of the sensing area of the line of optic nerve cells. The line of optic nerve cells on different spatial frequencies of the image. Figure 8 ~ A. (2 0 ) Image capture device (4 0 ) Database (5 1 ) Brightness adjustment device (1 0 0 ) Object to be tested (1) Component symbol (1 0) Half mirror (30) Optical lens (5 0 Control unit (60) drive mechanism ((70) (70) (enhanced zone (71) (7 1,) suppression zone