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    • 2. 发明授权
    • Sound recording on color film by hue modulation
    • 通过色调调制在彩色胶片上录音
    • US3969593A
    • 1976-07-13
    • US522233
    • 1974-11-08
    • Petro Vlahos
    • Petro Vlahos
    • G03B31/00G03B31/02G11B7/003G11B7/135G11B7/24H04N9/11G11B7/00G11B23/18
    • G11B7/1362G03B31/02G11B7/0032G11B7/1381
    • Sound is recorded on color motion picture film in the form of variations ofue rather than overall density, with inverse density variations of different color media of the film directly superposed. With three distinct color media it is possible in that manner to record two separate sound channels, the respective channels being hue modulated on distinct hue axes. Such hue modulated sound records are inherently virtually free from noise due to occlusions such as dirt and scratches on the film. Apparatus is disclosed for recording sound in the described manner and for reproducing sound from such records, including electronic means for reducing additional forms of noise. The inherent reduction of noise permits the normal sound track area of conventional films to accommodate several distinct tracks, each of which can carry two distinct sound channels or one sound channel and a control channel. Particularly effective and economical apparatus is described which can replace part of a conventional sound reproducing head and provide an existing motion picture projector with capability for reproducing such multi-track records.
    • 声音以色调变化而不是总体密度的形式记录在彩色电影胶片上,其中膜的不同颜色介质的反密度变化直接叠加。 使用三种不同的彩色介质,可以以这种方式记录两个单独的声道,相应的通道在不同的色相轴上进行色调调制。 这种色调调制的声音记录本质上基本上不受噪音影响,例如胶片上的污垢和划痕。 公开了用于以所描述的方式记录声音并且用于从这种记录再现声音的装置,包括用于减少附加噪声形式的电子装置。 噪音的固有降低允许常规胶片的正常声音区域容纳几个不同的音轨,每个音轨可以携带两个不同的声音通道或一个声音通道和控制通道。 描述了可以替代传统的声音再现头部分的特别有效和经济的装置,并提供具有再现这种多轨迹记录的能力的现有的电影投影仪。
    • 4. 发明授权
    • Backing color and luminance nonuniformity compensation
    • 支持颜色和亮度不均匀性补偿
    • US5515109A
    • 1996-05-07
    • US417649
    • 1995-04-05
    • Paul VlahosPetro Vlahos
    • Paul VlahosPetro Vlahos
    • H04N5/272H04N9/75
    • H04N5/272H04N9/75
    • A method and apparatus used in the field of image compositing which eliminates the need to obtain an original clear frame of the backing during production, by synthesizing during post production a clear frame of the backing from a frame of the foreground scene that includes the subject as well as the backing. This synthetic clear frame eliminates the problems of obtaining a registered clear frame during production, and thereby permits the ready application of nonuniformity correction to image compositing in both motion pictures and graphic arts. The invention is also directed to a method and apparatus used in the field of image compositing which reduces the processing time for developing the inhibit signal that prevents the corrections from being applied to the subject, the control signal E.sub.c, and a number of other functions that are computed from the colored backing. It is possible to generate only that portion of a clear-frame needed to apply screen correction, and thereby save a major portion of the time needed to process and composite the image.
    • 在图像合成领域中使用的方法和装置,其不需要在生产期间获得背衬的原始清晰框架,通过在后期制作中合成来自前景场景的框架的清晰框架,该框架包括被检体为 作为后盾。 这种合成清晰的框架消除了在生产期间获得注册的清晰框架的问题,从而允许在运动图像和图形艺术中对图像合成的不均匀性校正的准备应用。 本发明还涉及一种在图像合成领域中使用的方法和装置,其减少了开发禁止信号的处理时间,该禁止信号防止校正被施加到被摄体,控制信号Ec和多个其他功能, 从彩色背衬计算。 可以仅产生应用屏幕校正所需的清除帧的那部分,从而节省处理和合成图像所需的大部分时间。
    • 5. 发明授权
    • Backing color and luminance nonuniformity compensation for linear image
compositing
    • 支持线性图像合成的颜色和亮度不均匀性补偿
    • US5032901A
    • 1991-07-16
    • US212562
    • 1988-06-28
    • Petro Vlahos
    • Petro Vlahos
    • H04N5/272H04N9/74H04N9/75
    • H04N9/75
    • A linear image compositing system which corrects for nonuniform luminance and/or color of the colored backing without incurring the penalties of edge glow, edge darkening, loss of edge detail and other anomalies. A control signal is created directly proportional to the luminance of the colored backing and controls the level of the BG scene. Unless the control signal is corrected, the background scene will contain all the brightness and color variations occurring on the colored backing. Correction factors are developed by comparing the RGB video obtained from the backing before the subject is put in place, with the ideal values of RGB that would have been obtianed from a perfect backing. These correction factors correct the RGB video when the scene is scanned with the subject in place. The control signal, being zero in the subject area, may be used to inhibit the corrections in the subject area.
    • 线性图像合成系统,其校正着色背衬的不均匀亮度和/或颜色,而不会产生边缘发光,边缘变暗,边缘细节损失和其他异常的惩罚。 创建与彩色背衬的亮度成正比的控制信号,并控制BG场景的水平。 除非控制信号得到纠正,否则背景场景将包含彩色背景上出现的所有亮度和颜色变化。 校正因素是通过比较从被摄体所在的背景获得的RGB视频与从完美背景中获得的理想值的RGB来开发的。 当主体扫描场景时,这些校正因子校正RGB视频。 在该对象区域中为零的控制信号可以用于禁止对象区域中的校正。
    • 6. 发明授权
    • Comprehensive electronic compositing system
    • 综合电子合成系统
    • US4625231A
    • 1986-11-25
    • US604637
    • 1984-04-27
    • Petro Vlahos
    • Petro Vlahos
    • H04N9/75H04N9/74
    • H04N9/75
    • In the present invention, certain improvements are incorporated that permit removal of the backing color when its illumination is of non-constant color. In addition, an improved color logic is described that improves the simultaneous reproduction of fleshtones and green foliage in the same scene. A modified control logic is described that improves reproduction of red objects and fleshtones. A reversed window permits retention of objects whose color is identical to that of the backing. And, finally, a circuit is described which permits a super-imposing of titles or glow where said titles or glow may be made wholly transparent, semi-transparent or opaque.
    • 在本发明中,引入了某些改进,当其照明是非恒定颜色时,可以去除背衬颜色。 此外,描述了一种改进的颜色逻辑,其改善了同一场景中的肉质和绿色叶子的同时再现。 描述了改进的控制逻辑,其改善了红色物体和肉体的再现性。 反转的窗口允许保留颜色与背衬颜色相同的物体。 最后,描述了允许标题或发光超级强调的电路,其中所述标题或辉光可以被制成完全透明,半透明或不透明。
    • 8. 发明授权
    • Visible-invisible background prompter
    • 可见隐形背景提示
    • US06616281B1
    • 2003-09-09
    • US10214851
    • 2002-08-07
    • Paul VlahosPetro Vlahos
    • Paul VlahosPetro Vlahos
    • G06K900
    • H04N5/2222G09G5/026G09G2340/10G09G2340/12G09G2340/14H04N5/272
    • A video signal is generated representative of a background scene, such as a weather map, which provides an outline of all the detail in the map. This outline detail is made visible to a foreground subject by projecting it onto a white screen behind the subject in a selected color such as green. The projector is selectively inhibited so as to prevent the background detail from projecting onto the foreground subject. The white screen and the green detail lines are removed and replaced by the background scene by an image compositing process. Prompts are visible to the foreground subject, but not visible to a home viewing audience.
    • 生成表示背景场景的视频信号,例如天气图,其提供了地图中所有细节的轮廓。 这个轮廓细节通过将其投射到被选择物体后面的白色屏幕上,以选定的颜色(例如绿色)使得对于前景物体可见。 选择性地抑制投影仪,以防止背景细节投射到前景物体上。 白色屏幕和绿色细节线被图像合成过程移除并由背景场景替换。 提示对于前景主题是可见的,但对于家庭观众来说不可见。
    • 9. 发明授权
    • Method and apparatus for inhibiting projection of selected areas of a projected image
    • 用于抑制投影图像的所选区域的投影的方法和装置
    • US06361173B1
    • 2002-03-26
    • US09788026
    • 2001-02-16
    • Paul VlahosArpag DadourianPetro Vlahos
    • Paul VlahosArpag DadourianPetro Vlahos
    • G03B2100
    • G03B21/14G03B21/26H04N5/74H04N9/3194
    • A video projector shows the desired scene on a projection screen. An infrared source close to the video projector uniformly floods the projection screen with non-visible infrared radiation. An infrared sensitive camera, also close to the video projector, observes the projection screen and sees only the uniform infrared illumination of the screen. Upon entry of a subject into the projected video image, the infrared reflected from the subject will not match that of the projection screen and thus the subject area is identified. All pixels of the projected scene, in the area occupied by the subject, are inhibited before reaching the video projector. The subject may then look directly at an audience without being blinded by the projector.
    • 视频投影机在投影屏幕上显示所需的场景。 靠近视频投影机的红外线源以不可见的红外辐射均匀地喷射投影屏幕。 靠近视频投影机的红外敏感摄像机观察投影屏幕,只能看到屏幕的均匀红外照明。 当被摄体进入投影视频图像时,从被摄体反射的红外线将不匹配投影屏幕的红外,因此标识主体区域。 在到达影像投影机之前,被拍摄对象所占据的区域中的投影场景的所有像素被禁止。 然后,该主题可以直接观看观众而不被投影仪蒙蔽。
    • 10. 发明授权
    • Method of making a high-gain projection screen
    • 制造高增益投影屏的方法
    • US4338165A
    • 1982-07-06
    • US189107
    • 1980-09-22
    • Petro Vlahos
    • Petro Vlahos
    • C25D1/06G03B21/60C25D1/20
    • G03B21/602C25D1/06
    • Lenticular projection screens of improved optical accuracy and uniformity are produced by deriving the specular surfaces of all lenticules within at least a major screen area from a common unitary optical surface, typically using replication by electroforming. The initial master surface is typically formed by conventional machining and polishing of a body having axial symmetry in the general shape of an ogive. The unitary convex surface of revolution of the ogive is repeatedly replicated, and like sections of each replica are isolated and assembled on a transparent reference surface. The assembled sections are adhered to a stiff back, and the optical assembly face is replicated. Multiple replicas of the initial assembly are typically again assembled and replicated, leading ultimately to unitary panel units which form the projection screen. For drive-in theaters or the like, each lenticule is preferably made non-uniform in vertical curvature in a manner which increases the image brightness for a large majority of the viewers. Various shapes of the viewing area can be fitted by suitably formed lenticules. Certain non-symmetrical viewing areas are closely fitted by tilting symmetrical lenticules about the optical axis of the projector. Reflected light from spurious sources is further reduced by baffles which project toward the audience from boundaries between concave lenticules.
    • 具有改善的光学精度和均匀性的透镜投影屏幕通过在通常使用电铸复制的公共单一光学表面的至少主屏幕区域内导出所有微透镜的镜面来产生。 初始主表面通常通过常规的机械加工和抛光来形成,该主体具有一般形状的轴向对称的本体。 重复复制ogive的整体旋转表面,每个复制品的类似部分被隔离并组装在透明的参考表面上。 组装的部分被粘附到刚性的后面,并且光学组件面被复制。 通常再次组装和复制初始组件的多个副本,最终导致形成投影屏幕的整体面板单元。 对于驱动电影院等,每个微透镜优选地以垂直曲率不均匀的方式使得大多数观看者的图像亮度增加。 观看区域的各种形状可通过适当形成的微透镜进行装配。 某些非对称观看区域通过围绕投影仪的光轴倾斜对称的微透镜而紧密配合。 来自杂散源的反射光通过从凹面微透镜之间的边界向观众投射的挡板进一步减少。