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    • 1. 发明授权
    • Deficient pixel detection method and image signal processor
    • 缺陷像素检测方法和图像信号处理器
    • US06768513B1
    • 2004-07-27
    • US09680705
    • 2000-10-06
    • Tohru WatanabeMasato Teratani
    • Tohru WatanabeMasato Teratani
    • H04N964
    • H04N5/367
    • An image signal processor detects deficient pixels, such as pixels having a white deficiency or a black deficiency, and corrects the image signal so that the pixel deficiency is not reproduced. A memory circuit holds a target pixel signal and peripheral signals, which correspond to the pixels adjacent to the target pixel. A deficiency detection circuit compares the level of the target pixel signal with the levels of the peripheral pixel signals to detect whether the target pixel is deficient. A deficiency correction circuit corrects the signal of a detected deficient pixel using information from nearby pixels.
    • 图像信号处理器检测诸如具有白色不足或黑色不足的像素的缺陷像素,并校正图像信号,使得不再现像素缺陷。 存储电路保持对象像素信号和对应于与目标像素相邻的像素的周边信号。 缺陷检测电路将目标像素信号的电平与周边像素信号的电平进行比较,以检测目标像素是否不足。 缺陷校正电路使用来自附近像素的信息校正检测到的缺陷像素的信号。
    • 2. 发明授权
    • Image data processor and image data processing method
    • 图像数据处理器和图像数据处理方法
    • US07203357B2
    • 2007-04-10
    • US10656923
    • 2003-09-04
    • Masato TerataniTomomichi Nakai
    • Masato TerataniTomomichi Nakai
    • G06K9/00
    • G06T11/00
    • Image data of a target pixel and peripheral pixels are stored in a memory. Using a most significant bit extractor circuit, 4 most significant bits of data are extracted from each image data. A histogram circuit generates a histogram of the extracted 4-bit data. Referring to the histogram, a data processor circuit (17) replaces the image data of the target pixel with a maximum value of the numbers of pixels having the same level and outputs the processed data. Then, a digit-complementing circuit converts the data output from the data processor circuit to 8-bit data and outputs the converted data. In this manner, a regular image is converted into an image similar to a draft-design image.
    • 目标像素和周边像素的图像数据被存储在存储器中。 使用最有效的位提取器电路,从每个图像数据中提取4个最高有效位的数据。 直方图电路产生提取的4位数据的直方图。 参考直方图,数据处理器电路(17)以具有相同电平的像素数的最大值替换目标像素的图像数据并输出处理的数据。 然后,数字互补电路将从数据处理器电路输出的数据转换为8位数据并输出转换后的数据。 以这种方式,将常规图像转换成类似于草图设计图像的图像。