公开(公告)号：US06529211B2

公开(公告)日：2003-03-04

申请号：US09338165

申请日：1999-06-22

申请人： Kazuhiro Ohara ,  William J. Sexton ,  Akira Takeda ,  Gary Sextro

发明人： Kazuhiro Ohara ,  William J. Sexton ,  Akira Takeda ,  Gary Sextro

IPC分类号： G09G510

CPC分类号： G06T5/009 ,  G06T5/40 ,  G06T2207/10016

摘要： A method and apparatus for selectively scaling portions of image data based on the intensity levels of historical image data. The selective scaling, or level expansion, provides improved images by increasing or decreasing the intensity of a portion of image pixels. Black level expansion reduces the intensity of dark pixels and is appropriate when a relatively large number of the image pixels have a high intensity level. White level expansion increases the intensity of bright pixels and is appropriate when a relatively large number of image pixels have a low intensity level. Level expansion is implemented by using histogram comparators 402 to compare the intensity of each pixel with a threshold, typically on a frame-by-frame basis. When an adequate number of pixels in each frame meet the threshold criteria, the level expansion is increased. Field accumulator 404 is used to determine whether and by how much the image data is scaled. Field accumulator 404 increments each time a frame meets the expansion criteria, as determined by the histogram comparators 402, and decrements each time a frame does not meet the expansion criteria. The value accumulated by the field accumulator 404 is used by level expander 406 to scale at least a portion of the input data.

摘要翻译： 一种用于基于历史图像数据的强度级别选择性地缩放图像数据的部分的方法和装置。 选择性缩放或电平扩展通过增加或减少图像像素的一部分的强度来提供改进的图像。 黑色电平扩展会降低暗像素的强度，并且在相对较大数量的图像像素具有高亮度水平时是合适的。 白平衡扩展增加亮像素的强度，并且当相对大量的图像像素具有低强度水平时是合适的。 通过使用直方图比较器402，通常在逐帧的基础上比较每个像素的强度与阈值来实现电平扩展。 当每帧中足够数量的像素满足阈值标准时，级别扩展就会增加。 场累加器404用于确定是否和通过多少图像数据被缩放。 场累加器404每当帧满足由直方图比较器402所确定的扩展标准时增量，并且每当帧不符合扩展标准时递减。 由场累加器404累积的值由电平扩展器406用于缩放输入数据的至少一部分。

公开(公告)号：US20070030403A1

公开(公告)日：2007-02-08

申请号：US11161498

申请日：2005-08-05

申请人： Gary Sextro

发明人： Gary Sextro

IPC分类号： H04N5/64

CPC分类号： H04N5/74

摘要： Described are projection televisions with substantially reduced chin height. In one embodiment, an optical projection engine may be mounted to one side of a TV screen, thereby facilitating a projection television with reduced chin height. In other embodiments, two or more optical projection engines may be mounted in a cabinet to various sides of a TV screen, thereby facilitating a projection television with reduced chin height, added brightness, resolution, and/or other performance enhancements.

摘要翻译： 描述的是具有大大降低的下巴高度的投影电视机。 在一个实施例中，光学投影引擎可以安装在TV屏幕的一侧，从而便于具有降低的下巴高度的投影电视机。 在其他实施例中，两个或多个光学投影引擎可以安装在电视机屏幕的各个侧面上，从而便于具有降低的下巴高度，增加的亮度，分辨率和/或其他性能增强的投影电视。