1298144 【明内容】 發明概要 本發明之第一較佳態樣係提供一種可列印的水印影 像，其可被隱設於供列印的文件中。該影像包含一影像背 5景具有第-顏色的平均強度；及一指示區亦具有該第一顏 色的平均強度。至少該指示區的強度係為至少兩種不同強 度之頻振配置造成的結果。該水印影像的解析度，該頻振 配置’及"亥至少二強度係被選成，能使該影像背景與該指 示區的顏色和強|，會對肉眼呈顯為一致的，<旦在以一如 10低通濾波器地操作之複製裝置來處理該列印影像之後，該 指示區會變成令肉眼明顯可見的。 孩影像背景的平均強度亦可為二或更多不同強度之頻 振配置(dithered arrangement)造成的結果。該指示區之二或 更多的強度範圍，會大於該影像背景之二或更多的強度範 15圍。該影像背景與該指示區可為均一顏色。該水印影像可 包含一可見的標記區，其係與該均一顏色為不同的顏色， 或具有與該影像背景和該指示區不同的區域平均強度。 該水印影像可包含至少三個區，各區皆具有一選自一 組至少兩種顏色之第一顏色。該至少三個區可包含一第一 20區約為該水印表面積的15%，一中間區約為該水印表面積 的70%，及一第二區約為該水印表面積的15%。該第一和第 二區可為相同顏色。該中間區介設其間，而可為不同顏色。 在各區之間的邊界可由一變化圖案來凸顯。 於本發明之一第二較佳態樣中，乃提供一種能產生一 1298144 可列印之水印影像來結合於一 法包含以下步驟：選擇一影像 於一可列印文件中的方法。該方 衫像背景顏色和強度；以該顏色 及-等於該所擇強度的平均強度來填滿 區，並使各像㈣強度落在-背景強度範圍^像“ -指示區會㈣該所擇顏色與_等於該所擇強度之平 均強度來填滿’但使各像元的絲疮贫* 、，. __1298144 [Brief Description] Summary of the Invention A first preferred aspect of the present invention provides a printable watermark image that can be hidden in a document for printing. The image includes an image with a mean intensity of a first color; and an indicator region having an average intensity of the first color. At least the intensity of the indicator zone is the result of a frequency modulation configuration of at least two different intensities. The resolution of the watermark image, the frequency oscillation configuration 'and " at least two intensity systems are selected such that the image background and the color and intensity of the indication area are consistent with the naked eye, < Once the print image is processed by a copying device operating at a low pass filter such as 10, the indicator area becomes apparent to the naked eye. The average intensity of the child's image background can also be the result of two or more different intensity dithered arrangements. Two or more intensity ranges of the indicator zone may be greater than two or more intensity ranges of the image background. The image background and the indicator area may be uniform colors. The watermark image can include a visible marking area that is different from the uniform color or has an average regional intensity that is different from the image background and the indicator area. The watermark image can comprise at least three zones, each zone having a first color selected from the group consisting of at least two colors. The at least three zones may comprise a first 20 zone of about 15% of the surface area of the watermark, an intermediate zone of about 70% of the surface area of the watermark, and a second zone of about 15% of the surface area of the watermark. The first and second zones can be the same color. The intermediate zone is interposed therebetween and can be of different colors. The boundary between the zones can be highlighted by a varying pattern. In a second preferred aspect of the present invention, there is provided a method of generating a 1298144 printable watermark image for use in a method comprising the steps of: selecting an image in a printable file. The square shirt is like the background color and intensity; the area is filled with the color and the average intensity equal to the selected intensity, and the intensity of each image (4) falls within the range of - background intensity ^ like "- indicating the area meeting (4) The color and _ are equal to the average intensity of the selected intensity to fill 'but the periplasm of each pixel is poor*,,. __
眼明顯可見的。 填滿該背景的步驟可包含施加一具有第一差之二強产 的頻振圖案。而填滿該指示區的步驟可包含施加一具有第 一差之一強度的頻振圖案，該第二差係大於第一差。該所 15 擇的強度可小於RGB(239,239,239)。 其亦可包含以下步驟··接收一基本影像；及依據該背 景區和指示區之間的顏色或強度差異，而來識別該基本影 像中之一背景區與一指示區。 其亦可包含以下步驟·辨§忍该基本影像内之一可見的 20標記區；及以一不同於該第一顏色和強度的第二顏色和強 度來填滿該可見的標記區。 其又可更包含以下步驟：接收一可見標記基本影像及 一指示基本影像；辨認該指示基本影像中的指示區及背景 區，並將之填滿。一可見標記區亦會被辨認來作為該可見 1298144 標記基本影像中之-背景區。該可見標記基本影像與該被 填滿及處理後的指示基本影像乃可被結合，而使各對應像 元在所述之一該影像中的像元顏色和強度，會超過在^一 影像中的像兀顏色和強度。在該可見標記影像之背景區中 5的像兀係對該已處理之指示基本影像中的像元具有較^的 超差。而在該可見標記基本影像中之可見標記區内:像元 會對該已處理之指示基本影像中的像元具有較高的超差。 在本發明之另一較佳態樣中，係提供一種能產生一可 列印的水印影像來結合於一可列印文件中的系統。該系統 H)包含：一裝置可選擇一影像背景顏色和強度；一裝置能以 該顏色及-等於所擇強度的平均強度來填滿該水印影像的 背景區，並使各像元的強度落在一背景強度範圍内；及一 裝置能以該所擇顏色及-等於所擇強度的平均強度來填滿 -指示區，但使各像it的強度落在—比前述強度更大的範 15圍内，而令該影像的解析度，該頻振配置，及該二或更多 強度被選成，能使该影像背景與該指示區的顏色和強度， 會對肉眼呈顯為-致的，但在以一如低通減波器地操作之 複製裝置來處理该印列影像之後，該指示區會變成令肉眼 明顯可見的。 20 肖來填滿該背景的裝置乃包含可施加—具有第〆差之 -強度的頻振圖案之裝置。而用來填滿該指示區的裝置則 包含可施加-具有第二差之二強度的頻振圖案之裝置，該 第二差係大於第一差。該所擇的強度可不小於 RGB(239,239,239)。 1298144 明之非限制性的較佳實施例來說明，該說明係參照所附圖 式來描述，其中： 第1圖為一灰階水印的原始圖案； 第2圖為一彩色水印的原始公司名稱影像； 5 第3圖為一彩色水印的複製字樣影像； 第4圖為供成型一水印的圖案影像； 第5圖示出一複製標記之點的初始圖案； 第6圖示出初始的水印影像； 第7圖示出伸展之後的初始水印影像； 10 第8圖示出控制強度之後的水印； 第9圖示出雜訊被施加於整體背景之後的水印； 第10圖為本發明產生水印之較佳過程的方塊圖； 第11圖示出本發明的像元伸展範圍； 第12圖為第10圖之水印產生程序的流程圖； 15 第13圖為第10圖之水印埋設程序的流程圖； 第14圖示出一具有水印的文件； 第15圖示第14圖的文件在影印機的濃度太淡時的影印 結果；及 第16圖示出第14圖的文件在影印機的濃度太暗時的影 20 印結果。 【實施方式3 較佳實施例之詳細說明 本發明係有關於複製保護性列印或數位文件的技術。 本發明能使在一列印文件中的影像或標記被隱設成，當該 10 1298144 ㈣’該影似標料會被相。而#該文件被 衫17或掃描時，該影像或標記即變成可見的。 在數位或列印文件上的水印係為—種线，其可控制 =、學水印方法來列印之文件的複製。該线包含一防複 “予水印和防複製背景。有兩種水印可被使用：一種灰 階水印，及一種彩色水印。 、該系統包含一水印產生器，及—水印可被埋設來控制 以光學水印法列印之文件的複製。 在-複製控制程序中，該數位文件的所有人或被授權 10使用者會使用-標諸(圖案影像)，其會結合某些著作權字樣 而來顯示該文件的所有權。在影印該水印文件之後，該影 印文件將會示出明顯的字樣(例如，，複製 被複製、修整、或鼠改等等。當與原始水印文件 列印結合，將能形成-種可供鑑定數位及紙張文件的 15系統。 如第12圖所不，欲造成一灰階水印時，該水印產生器 會接收-作為輸人的影像12()1。該水印產生器會在步驟 1202由第1圖所見的圖案影像來擷取各特徵部份。被該水印 產生器所擷取的特徵部份乃包括原始背景1〇3，公司字樣 2〇繼，及複製字樣102等。該公司字樣1〇1的顏色應被選成， S影印之後’其會70全或部份地消失。為能達到如此，故 該公司字樣最好為白色。又最好在該圖案影像中，該公司 字樣101和複製字樣102係為相同顏色（白色）。該複製 切始水印圖案會被產生，而包含很多小點和背景互相交 1298144 豐。該等小點1G7全為相同尺寸，且在該7jC印圖案 點的間距會保持相同。此可見於第5圖中。〃之各小The eye is clearly visible. The step of filling the background may include applying a frequency oscillation pattern having a second difference of the first difference. The step of filling the indicator zone may include applying a frequency oscillation pattern having a strength of the first difference, the second difference being greater than the first difference. The intensity of the selection can be less than RGB (239, 239, 239). It may further comprise the steps of: receiving a basic image; and identifying a background area and an indication area of the basic image according to a difference in color or intensity between the background area and the indication area. It may also include the steps of: recognizing one of the 20 marked areas visible in the base image; and filling the visible marked area with a second color and intensity different from the first color and intensity. The method further includes the steps of: receiving a visible mark basic image and an indication basic image; identifying the indication area and the background area in the indication basic image, and filling it. A visible marker area is also recognized as the background area in the visible 1298144 marker base image. The visible mark basic image and the filled and processed indicated basic image may be combined, so that the color and intensity of the corresponding pixel in the one of the images may exceed the image in the image. Like the color and intensity of 兀. The image system in the background area of the visible mark image has a relatively poor tolerance for the pixels in the processed basic image. And in the visible mark area in the visible mark basic image: the picture element has a higher tolerance for the pixels in the processed basic image. In another preferred aspect of the invention, a system for producing a printable watermark image for incorporation into a printable document is provided. The system H) comprises: a device for selecting an image background color and intensity; a device capable of filling the background region of the watermark image with the color and an average intensity equal to the selected intensity, and causing the intensity of each pixel to fall Within a range of background intensities; and a device capable of filling the - indicating region with the selected color and - equal to the average intensity of the selected intensity, but causing the intensity of each image to fall - a greater than the aforementioned intensity 15 Within the circumference, the resolution of the image, the frequency modulation configuration, and the two or more intensities are selected such that the image background and the color and intensity of the indicator area are visible to the naked eye. However, after the printed image is processed by a copying device operated as a low-pass reducer, the indicating area becomes apparent to the naked eye. 20 The device that Shaw fills the background contains a device that can apply a frequency-vibration pattern with a coma-intensity. The means for filling the indicator zone comprises means for applying a frequency oscillation pattern having a second difference of two strengths, the second difference being greater than the first difference. The selected intensity can be no less than RGB (239, 239, 239). 1298144 is a non-limiting preferred embodiment of the description, which is described with reference to the accompanying drawings, wherein: FIG. 1 is an original pattern of a gray watermark; FIG. 2 is an original company name image of a color watermark 5 Fig. 3 is a copy of the color watermark image; Fig. 4 is a pattern image for forming a watermark; Fig. 5 shows an initial pattern of dots of a copy mark; Fig. 6 shows an initial watermark image; Figure 7 shows the initial watermark image after stretching; 10 Figure 8 shows the watermark after the intensity is controlled; Figure 9 shows the watermark after the noise is applied to the overall background; Figure 10 shows the watermark of the present invention. a block diagram of a preferred process; FIG. 11 is a flowchart showing a cell extension range of the present invention; FIG. 12 is a flow chart of a watermark generating program of FIG. 10; 15 FIG. 13 is a flowchart of a watermark embedding program of FIG. Figure 14 shows a document with a watermark; Figure 15 shows the photocopying result of the document of Figure 14 when the density of the photocopier is too light; and Figure 16 shows that the file of Figure 14 is too dark at the photocopier. When the shadow of 20 marks the result. [Embodiment 3] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to techniques for copying protective print or digital files. The present invention enables images or indicia in a printed document to be hidden such that when the 10 1298144 (four)' image appears to be the same. And when the file is scanned or scanned, the image or mark becomes visible. The watermark on a digital or printed document is a type of line that controls the copying of the printed document by the watermark method. The line contains an anti-reset "pre-watermark and anti-copy background. There are two watermarks that can be used: a grayscale watermark, and a color watermark. The system includes a watermark generator, and - the watermark can be embedded to control Copying of documents printed by optical watermarking. In the copy control program, the owner of the digital file or the authorized 10 user will use the - mark (pattern image), which will be displayed in conjunction with certain copyright words. Ownership of the document. After photocopying the watermark file, the photocopy file will show obvious words (for example, the copy is copied, trimmed, or ratned, etc.. When combined with the original watermark file print, it will form - A system for identifying digital and paper documents. As shown in Fig. 12, when a grayscale watermark is to be generated, the watermark generator will receive - as the input image 12()1. The watermark generator will Step 1202 captures each feature part from the pattern image seen in Fig. 1. The feature parts captured by the watermark generator include the original background 1〇3, the company typeface 2, and the copy type 102. The The color of the word 1〇1 should be selected, and after S photocopying, it will disappear 70% or partially. In order to achieve this, the company should be white. It is best in the image. The company type 101 and the copy type 102 are in the same color (white). The copy cut watermark pattern is generated, and contains many small dots and the background intersects each other 1298144. These small dots 1G7 are all the same size, and The spacing of the 7jC printed pattern points will remain the same. This can be seen in Figure 5.
5亥灰階水印和彩色水印之小點的大小和顏色比I 制成，在影印之後，兮莖I处、主姑自^被控 I心便及#小點可被清楚地重製及八 5水印的控制係藉調制，此將會詳細說明於後。該；小點該 可太小而致在影印之後不能被重製；但亦不可^大’而t 們能在水印中被肉眼看出。 匕 該原始圖案的水印影像之尺寸（寬X高）對該文件影像 的比例，對該等小點在影印之後的可見度是一項重要的因 10素。該原始圖案影像的尺寸係被選成，當該水印伸展並埋 入該文件中時，該等小點會足夠地小，但在影印之後能被 重製及分辨。例如，若所擇的原始圖案影像係為56〇χ65〇， 則用來埋設的原始文件尺寸係為300(^4x350(^fi。其它的尺 寸亦可被使用’只要該等小點能夠清楚並可被重製。 15 伸展率（即該水印分別沿X和y方向伸展的倍數)對其控 制該等小點最後的間隔是為一重要的因素。若該水印由原 始尺寸伸展4x4倍，且在控制強度之後僅留下一小點，則各 點之間距將成為原始小點尺寸的3倍。該等間距即足以在影 印之後來分辨該等小點。 20 該公司字樣103並不會在該產生過程1203中改變，且該 複印字樣102會保持該點圖案。該水印背景109則會被選 成，當該列印影像被複印之後，該背景會成為灰色。由該 水印產生器所擇的複製字樣背景108將會比整體的背景109 更淡一些。在步驟1204時，該水印產生器將會伸展該初始 12 1298144 的水印。該初始水印會分別沿χ及y方向來伸展。在一例中， 若一原始像元為一點，則在該水印以mxn的伸展率來擴伸 之後，該原始的小點將會變成mxn倍的大小。此係可在第 11A圖看出，其中僅有(〇,〇)的位置被填滿。在第llb圖中， 5該像元已以4倍的伸展率來擴展，故在(〇,〇)、（〇，！）、0，2)、 (〇,3)、（1，0)、（1，1)、（1，2)、（1，3)、(2,0)、(2，1)、(2,2)、(2,3)、 (3,0)、（3，1)、（3,2)、（3,3)等各位置皆會被填滿。 伸展該初始水印的公式係為： (nxX0+(i-l)，mxY0+(j_l))。 10 其中（Xg，Yg)係為點的切始位置，m與η為擴伸的伸展 率，而i及j為循環變數。 其如何應用可見如下模擬代碼： 對(i=〇 ; i<m ; i++) 及(j-, ; j++)而言，The size and color ratio of the 5 gradation watermark and the color watermark are made by I. After the photocopying, the stalk I, the lord, the controlled I heart and the # small point can be clearly reproduced and eight 5 The control of the watermark is by modulation, which will be described in detail later. The small dots should be too small to be reworked after photocopying; but they should not be large and can be seen by the naked eye in the watermark.比例 The size of the watermark image of the original pattern (width X height) is the ratio of the image of the document, and the visibility of the dots after photocopying is an important factor. The size of the original pattern image is selected such that when the watermark is stretched and embedded in the document, the dots are sufficiently small but can be reproduced and resolved after photocopying. For example, if the original image image selected is 56〇χ65〇, the original file size used for embedding is 300 (^4x350 (^fi. Other sizes can also be used' as long as the dots are clear and Can be reproduced. 15 The stretch rate (i.e., the multiple of the watermark extending in the X and y directions, respectively) is an important factor in controlling the final spacing of the dots. If the watermark is stretched 4x4 times from the original size, and After leaving only a small point after controlling the intensity, the distance between the points will be three times the original small dot size. The spacing is sufficient to distinguish the small dots after photocopying. 20 The company word 103 does not The generation process 1203 changes, and the copy pattern 102 maintains the dot pattern. The watermark background 109 is selected such that when the print image is copied, the background becomes gray. Selected by the watermark generator The copied typeface background 108 will be lighter than the overall background 109. At step 1204, the watermark generator will stretch the initial 12 1298144 watermark. The initial watermark will stretch along the χ and y directions, respectively. In, if one The starting pixel is a point, then after the watermark is expanded by the extension of mxn, the original small dot will become mxn times. This can be seen in Figure 11A, where only (〇, 〇) The position is filled. In the llb diagram, 5 the pixel has been expanded by 4 times the stretch rate, so at (〇, 〇), (〇, !), 0, 2), (〇, 3) , (1,0), (1,1), (1,2), (1,3), (2,0), (2,1), (2,2), (2,3), ( Each position such as 3,0), (3,1), (3,2), (3,3) will be filled. The formula for stretching the initial watermark is: (nxX0+(il),mxY0+(j_l) 10 where (Xg, Yg) is the starting position of the point, m and η are the stretching ratios of the expansion, and i and j are the cyclic variables. How to apply the following simulation code: (i=〇; i< ;m ; i++) and (j-, ; j++),
15 則新點位置為(nxXG+(i_ 1 )，mx YQ+(J· _ i ))= J 該擴伸的水印可見於第7圖中。 該水印網會在步驟1205中被調制。調制係被用來減少 該水印的強度，錢料小關可見度最錢。由原始點15 The new point position is (nxXG+(i_ 1 ), mx YQ+(J· _ i ))= J The watermark of the expansion can be seen in Fig. 7. The watermark network will be modulated in step 1205. The modulation system is used to reduce the intensity of the watermark, and the money is the most visible. Original point
距離=7^X7+(少-?〇)2Distance = 7^X7+ (less -? 〇) 2
而（x，y)為伸展位置。 選為：基準值-1，則每 ^298144 一擴伸的大點將會僅有一點被留下。此可見於第11C圖中。 假使在（0,0)位置的點被擴伸4x4倍，則在第^圖中之 (〇,〇)、（〇，1)、（〇,2)、（0,3)、（1，0)、（1，1)、（1，2)、（1，3)、（2 0)、 (2，1)、（2,2)、（2,3)、（3,0)、（3，1)、（3,2)、（3,3)各位置的距 5 離值，將分別為〇, 1，2, 3, 1，1.414, 2.236, 3.1623, 2.236, 2.828, 3.6056, 3,3.1623，3.6056, 4.2426等。若該基準值係選 為· 3>基準值>2，則在控制強度之後，僅有在（I，】）（2 1) (2,2)位置的點會被留下。所擇的基準值是否能妥當運作， 將取決於影印之後之各小點的可見度。例如，若影印之後， 1〇該小點不能被重製，則該基準值將會被調整為一較小值(使 所形成的點更大一些）。該伸展的水印可被見於第8圖中。 該水印的背景嗣會在步驟1206中，藉選擇一類似於整體背 景109的背景，並將該背景任意地散佈在水印背景中，而來 被隨機化(mndomized)如第9圖所示。所產生的水印嗣會被 15埋入高解析度的文件中⑽7)，以滿足所要獲得的視纽 果0 以王的所有步驟可見於第1()圖的方塊圖中。該 原始的圖案影像會被饋入水印產生器中⑽），且初始的水 20 印圖案會被產生(m)。由該初始的水印圖案會產生一初始 水印（122) ’並被伸展（123)。嗣該水印的強度會被控制 (124)，且該水印會被隨機化（125)。 產生々色水印的程序亦類似於上述灰階水印，但其 =同處在f彩色水印可選擇隨機化該背景二且 新的複製《、複製字_、及整嶋等。在該水印中、， 14 1298144 將可添加一些白線來提高該等複製字樣的可見度。 為產生一彩色水印，該水印產生器會接收二圖案影像 來作為輸人。該二圖案影像之—係被用來獲得第顶所見的 複製字樣資訊，而另-者會㈣來獲得第2圖所見的公司字 樣資訊。該絲®案影像的特徵部份將會被擷取。其掘取 特徵的過程係相同於灰階水印。 10 15 20 該初始的水印圖案將會被產生。其包含許多小點和背 景而會互相交疊。整個彩色背景將會分成三個部份：最左 部份、中間部份和最右部份。因&，該複製字樣和複製字 樣背景亦會被分成三個部份。不_彩色值將會被使用於 此二邵物、。各影像的And (x, y) is the extended position. Selected as: the reference value -1, then only one point will be left for every large extension of ^298144. This can be seen in Figure 11C. If the point at the (0,0) position is expanded by 4x4 times, then (〇,〇), (〇,1), (〇,2), (0,3),(1, 0), (1,1), (1,2), (1,3), (2 0), (2,1), (2,2), (2,3), (3,0), The distances from the positions of (3,1), (3,2), and (3,3) will be 〇, 1,2, 3, 1,1.414, 2.236, 3.1623, 2.236, 2.828, 3.6056, respectively. 3, 3.1623, 3.6056, 4.2426, etc. If the reference value is selected as "3" and the reference value > 2, only the point at the (I, 】) (2 1) (2, 2) position will be left after the intensity is controlled. Whether the chosen reference value works properly will depend on the visibility of the small dots after the photocopy. For example, if the small dot cannot be reworked after photocopying, the reference value will be adjusted to a smaller value (making the formed dots larger). This stretched watermark can be seen in Figure 8. The background of the watermark will be randomized (mndomized) as shown in Fig. 9 by selecting a background similar to the overall background 109 and arbitrarily spreading the background in the watermark background in step 1206. The resulting watermark 嗣 will be buried in the high-resolution file (10) 7) to satisfy the desired gauss 0. All steps of the king can be found in the block diagram of the 1() graph. The original pattern image is fed into the watermark generator (10)) and the initial water 20 print pattern is generated (m). An initial watermark (122)' is generated from the initial watermark pattern and stretched (123). The intensity of the watermark is controlled (124) and the watermark is randomized (125). The procedure for generating a sigma watermark is also similar to the grayscale watermark described above, but its = same in the f-color watermark can optionally randomize the background 2 and the new copy, copy _, and tween. In the watermark, 14 1298144 will add some white lines to improve the visibility of the copied words. To generate a color watermark, the watermark generator receives the two pattern images as input. The two-pattern image is used to obtain the copy type information seen at the top, and the other will (4) obtain the company word information as seen in Figure 2. The features of the Silk® image will be captured. The process of excavating features is the same as that of grayscale watermarking. 10 15 20 This initial watermark pattern will be generated. It contains many small dots and backgrounds that overlap each other. The entire color background will be divided into three parts: the leftmost part, the middle part and the rightmost part. Due to &, the copied and copied background will also be divided into three parts. No _ color value will be used for this two. For each image
-，苜议里組，且一改 的圖案會被產生於料彩色值之間。在—較佳實施例中 該等影像會被分成三個垂直部份：左邊約15%，中間-, the group is discussed, and the changed pattern will be generated between the color values. In the preferred embodiment, the images are divided into three vertical portions: about 15% to the left, in the middle
7心及㈣約15%。料影像的左、右部份最好使用相 的色并〉Π亥改變的圖案影像亦可使用Adobe Photo Shop漸 工具來產生。其可做到令—改變圖案能被產生，而肉眼 此今易地；fiij隱藏的字樣。該初始水印將會參考所提供1 複製字樣與公司字樣來被產生。只有複製字樣會保持該 小點j A司字樣將會㈣與在圖⑽彡像巾相同的顏色。 β 1、作°周制之用，該初始水印會分別沿x及y方向1 展乂獲付&大之點’如同在灰階水印中之操作。該彩 印將會_ —獲得—請的視感效果 ，此亦如同灰階7 製字樣、敕^4水印#景_化’或者形成—組新的; I子樣^背景、及複製字樣t景而來為之。 15 1298144 若係選擇隨機化’則一類似的彩色背景將會被選出， 然後該彩色背景會被隨機化而來使其均勻地散佈。 若係選擇施加一組新的複製字樣、整體背景、及複製 字樣背景，則該等複製字樣、整體背景、及複製字樣背景 5 之圖案影像將會被施加於該彩色水印上，來達到良好的視 覺效果。 一複製字樣背景會被用來使該複製字樣在影印之後更 為明顯。所使用的複製字樣背景會比整體背景更淡，因此 在影印之後，該複製字樣背景將會淡化，而使該複製字樣 10變得更為凸顯。 例如若使用粉紅色，則8%含量的粉紅色會被用於該複 製字樣背景，88%含量的粉紅色會被用於該複製字樣，而 42%含量的粉紅色會被用於整體背景。使用相同的顏色會 令肉眼較難以看出該複製字樣。 15 水印的埋設會在空間區域中來進行，而如第13圖所 示。原始文件的像元值會被直接修正來埋設該水印。若該 水印必須保持某種形狀，則一形狀影像會被用來作為基準 影像，而來將該水印成型為所需的形狀。 欲埋設一灰階水印時(第Π圖），要被標記水印的原始文 20件會被轉變成適當的影像格幻则，例如一gif•標。在步驟 '302中’供埋_水印的位置會被荒尋。具有較少字樣的 區域係供標記水印的理想位置，因為其在影印之後能夠達 到較佳的可見度。 一旦決定該水印要被埋設在何處之後，則一水印會在 1298144 步驟1303藉如灰階水印的像元調制來被埋設。假使該原始 文件的像元落在該水印像元範圍之外，則所造成的像元將 會與原始文件的像元值相同。若該原始文件的像元為白 色，則所造成的像元將會相同於該水印像元值。但是，若 5 該原始文件的像元為黑色，則所造成的像元將會相同於該 原始文件像元值。最後，若該原始文件像元係介於白色和 黑色像元之間，則所造成的像元將會相同於該原始文件像 元值。 若該水印必須使用一形狀來成型，如第4圖所示，則該 10 調制將會不同。若該原始文件像元落在該水印像元範圍之 外，則所造成的像元將會相同於原始文件的像元值。若該 原始文件像元為白色且落在該形狀外部，則所造成的像元 將為一白色像元。但是，若該原始文件像元為白色且落在 該形狀内部，則所造成的像元將會相同於該水印像元。若 15 該原始文件像元為黑色且落在該形狀外部，則所造成的像 元將會相同於該原始文件像元。但是，若該原始文件像元 為黑色且落在該形狀内部，則所造成的像元將會相同於該 原始文件像元。若該原始文件像元既非白色亦非黑色，則 所造成的像元將會相同於該原始文件像元值。 20 该程序將會發生於該水印影像的母一個像元。在該水 印影像已被埋設之後，該文件將會被轉成一適當的影像格 式。例如，一jpeg或gif檔。 若對一彩色水印而言，在步驟1303中，水印將會被埋 入一文件的整體背景中。要埋設一水印，則該需要標記水 17 1298144 p的原始文件將會被轉化成該適當的 影像格式，例如一 gif ^。供埋設該水印的位置將會被找出 。就彩色文件而言， 4整個$景將會被選作埋設區域，而可獲得良好的視覺效 果。 5 忒办色水印會被以像元調制來埋設。若該原始文件像 元落在水印像元範圍外部，則所造成的像元會相同於原始 文件像元值。若該原始文件像元為白色像元，則所造成的 像兀將會相同於該水印像元值。若該原始文件像元為黑色 一、丨所^成的像元將會相同於該原始文件像元值。若 10該原始文件像元值大於水印像元，則所造成的像元將會相 同於h P像元值。若該原始文件像元既非白色亦非黑色， 則所U成的像元將會相同於該原始文件像元值。 叙使彩色水印必須被成型，則彩色調制來埋設該水 印必須將該形狀納入考量。若該原始文件像元落在該水印 15像兀範圍之外，則所造成的像元會與該原始像元相同。若 該原始文件像元值為白色且落在該形狀外部，則所造成的 像兀將會相同於該原始文件像元。若該原始文件像元值為 白色並落在該形狀内部，則所造成的像元將會相同於該水 印像兀值。若該原始文件像元值為黑色且落在該形狀之 2〇外’則所造成的像元將會相同於原始文件像元值。若該原 始文件像元值為黑色並落在該形狀内部，則所造成的像元 將會相同於該原始文件像元值。若該原始文件像元值既非 黑色亦非白色並落在該形狀外部，則所造成的像元將會相 同於原始文件像元值。若該原始文件像元值既非黑色亦非 18 1298144 白色聽在該形狀㈣，賴造成的像切會相同於該原 始文件像元值。 在該水印影像被埋設之後，該影像將會被轉成一適當 的影像格式。例如，一jpeg或gif槽。 5 10 15 20 假使該影印機的濃度太淡或太暗，或其解析度相似於 列印機，則會較難以分辨該複製字樣〜列印_解析度 典型為600〜1200dpi，而一影印機的解析度典型為丨5〇又 600dpi(比此範圍更高的上眼亦可見於更高級的影印機）； 克服此問題，一顏色檢測器將會被使用。如 . 又罘14至16圖所 示，該顏色檢測包含一高灰階背景，及該複製 ^ 貝的指示， 例如”無效”的字樣。該，，無效，，字樣在當被以非常暗、* 來影印時（第16圖）將會明顯易見；而在濃度非常軻、/辰度 15圖）將會甚為模糊。該顏色檢測器可用來辨人寺（第 吨碌影印機的 濃度。有兩種顏色檢測器可被使用：淡色檢测器及供 測器。當該影印機的濃度太淡時，該淡色檢冽器將檢 看不到，此乃表示該濃度的選擇不正確。當該影印&變j 度太暗時，則該暗色檢測器會變得太暗而看不到，、、展 不其濃度並未被正確地選擇。 在该標纪水印的過程中，該水印的背景係一 、、 重要因 素。若該背景太暗，則在影印之後不會淡化，因此嗜仫S 效果會不如應有狀況一般地明顯可見。若該背景太# 原始的標誌將不會在該水印中清楚可見。因此，、、/則 原始標誌的可見度與該背景的良好淡化效果之間來作j4 衷妥協。 # 19 1298144 【圖式之主要元件代表符號表】 101···公司字樣 108…複製字樣背景 102···複印字樣 109…水印背景 103···原始背景 120〜125···產生水印的步驟 107…小點 1301〜1304…埋設水印的步驟 227 hearts and (4) about 15%. It is best to use the color of the phase in the left and right parts of the image and the pattern image changed by Π 亦可 can also be generated using the Adobe Photo Shop tool. It can be done - changing patterns can be produced, and the naked eye is now easy; fiij hidden words. The initial watermark will be generated with reference to the provided 1 copy and company typeface. Only the copy type will keep the small point j A word will (4) the same color as the picture (10). 1 1, for the ° week system, the initial watermark will be displayed in the x and y directions, respectively, and the same as the operation in the gray watermark. The color printing will _-get-please the visual effect, which is also like the grayscale 7 system typeface, 敕^4 watermark #景_化' or form-group new; I sub-sample ^ background, and copy type t scene And come to it. 15 1298144 If randomization is selected, a similar colored background will be selected and the colored background will be randomized to spread evenly. If a new set of copied words, a whole background, and a copied typeface background are selected, the copied image, the overall background, and the patterned image of the copied typeface background 5 will be applied to the colored watermark to achieve good Visual effect. A copy of the background will be used to make the copy more visible after photocopying. The copied typeface background used will be lighter than the overall background, so after copying, the copied typeface background will be faded, making the copied typeface 10 more prominent. For example, if pink is used, an 8% pink color will be used for the replicated background, an 88% pink color will be used for the copy, and a 42% pink color will be used for the overall background. Using the same color makes it harder for the naked eye to see the copy. 15 The embedding of the watermark will occur in the spatial region, as shown in Figure 13. The cell value of the original file will be directly corrected to embed the watermark. If the watermark must maintain a certain shape, a shape image will be used as the reference image to shape the watermark into the desired shape. When a grayscale watermark is to be buried (figure map), the original 20 text to be marked watermark will be converted into an appropriate image puzzle, such as a gif. The location of the watermark in step '302 will be abandoned. An area with fewer words is the ideal location for marking watermarks because it achieves better visibility after photocopying. Once the watermark is to be buried, a watermark is buried at 1298144, step 1303, by pixel modulation of the grayscale watermark. If the cell of the original file falls outside the range of the watermark cell, the resulting cell will be the same as the cell value of the original file. If the cell of the original file is white, the resulting cell will be the same as the watermark cell value. However, if the cell of the original file is black, the resulting cell will be the same as the original file cell value. Finally, if the original file cell is between white and black cells, the resulting cell will be the same as the original file cell value. If the watermark must be shaped using a shape, as shown in Figure 4, the 10 modulation will be different. If the original file cell falls outside the range of the watermark cell, the resulting cell will be the same as the cell value of the original file. If the original file cell is white and falls outside the shape, the resulting cell will be a white pixel. However, if the original file cell is white and falls inside the shape, the resulting cell will be the same as the watermark cell. If the original file cell is black and falls outside the shape, the resulting cell will be the same as the original file cell. However, if the original file cell is black and falls inside the shape, the resulting cell will be the same as the original file cell. If the original file cell is neither white nor black, the resulting cell will be the same as the original file cell value. 20 This program will occur on the parent cell of the watermark image. After the watermark image has been buried, the file will be converted to an appropriate image format. For example, a jpeg or gif file. For a color watermark, in step 1303, the watermark will be embedded in the overall background of a file. To embed a watermark, the original file that needs to mark water 17 1298144 p will be converted to the appropriate image format, such as a gif ^. The location where the watermark is buried will be found. As far as color documents are concerned, 4 the entire $view will be selected as the buried area for good visual effects. 5 The color watermark will be buried in the pixel modulation. If the original file cell falls outside the watermark cell range, the resulting cell will be the same as the original file cell value. If the original file cell is a white cell, the resulting image will be the same as the watermark cell value. If the original file cell is black, the cell will be the same as the original file cell value. If the original file pixel value is greater than the watermark cell, the resulting pixel will be the same as the h P cell value. If the original file cell is neither white nor black, then the U-formed cell will be the same as the original file cell value. To make the color watermark have to be shaped, the color modulation to embed the watermark must take this shape into consideration. If the original file cell falls outside the watermark 15 range, the resulting pixel will be the same as the original cell. If the original file cell value is white and falls outside the shape, the resulting image will be the same as the original file cell. If the original file cell value is white and falls inside the shape, the resulting cell will be the same as the watermark value. If the original file cell value is black and falls outside of the shape, then the resulting cell will be the same as the original file cell value. If the original file cell value is black and falls inside the shape, the resulting cell will be the same as the original file cell value. If the original file cell value is neither black nor white and falls outside the shape, the resulting cell will be the same as the original file cell value. If the original file cell value is neither black nor 18 1298144 white in the shape (4), the image cut will be the same as the original file cell value. After the watermark image is buried, the image will be converted to an appropriate image format. For example, a jpeg or gif slot. 5 10 15 20 If the copier's concentration is too light or too dark, or its resolution is similar to the printer, it will be more difficult to distinguish the copy type ~ print _ resolution is typically 600~1200dpi, and a photocopier The resolution is typically 丨5〇 and 600dpi (upper eyes than this range can also be found in more advanced photocopiers); to overcome this problem, a color detector will be used. As shown in Fig. 14 to Fig. 16, the color detection includes a high grayscale background, and an indication of the copy, such as "invalid". This, invalid, the words will be obvious when they are photocopied with very dark, * (figure 16); and the concentration is very low, / Chen time 15 map) will be very vague. The color detector can be used to identify the density of the temple (the density of the ton photocopier. There are two color detectors that can be used: the light color detector and the detector. When the concentration of the photocopier is too light, the color test The detector will not be detected, which means that the selection of the concentration is incorrect. When the photocopy & variable j degree is too dark, the dark color detector will become too dark to be seen, and will not be displayed. The concentration is not correctly selected. In the process of the standard watermark, the background of the watermark is an important factor. If the background is too dark, it will not fade after photocopying, so the effect of eosis is not as good as The condition is generally visible. If the background is too large, the original logo will not be clearly visible in the watermark. Therefore, , , / / the original logo's visibility and the background's good fade effect to make a compromise. # 19 1298144 [Main component representative symbol table of the drawing] 101···Company typeface 108...Copying typeface background 102···Copying type 109...Watermark background 103···Original background 120~125···Step of generating watermark 107...small 1301~1304 Step embedded watermark of 22