DIGITAL IMAGE EXPOSURE CORRECTION
    1.
    发明申请
    DIGITAL IMAGE EXPOSURE CORRECTION 有权
    数字图像曝光校正

    公开(公告)号:US20100329558A1

    公开(公告)日:2010-12-30

    申请号:US12874809

    申请日:2010-09-02

    IPC分类号: G06K9/34 G06K9/46

    CPC分类号: H04N1/4072

    摘要: Techniques are disclosed for correcting the exposure of a digital image. An exposure predictor may be generated based on a set of images for which ground truth data are known. After identifying an optimal set of features, the exposure of the digital image may be corrected by extracting values of the selected optimal features from the image, using the predictor to predict a desired exposure correction for the image, and correcting the exposure of the image by the predicted desired amount. Exposure correction is based on a model that relates intensity of light in the world to the RGB digits of the digital image. The model comprises a gamma function that models the response of a typical monitor and a S-shaped curve that compresses the large dynamic range of the world to the small dynamic range of the RGB digit space.

    摘要翻译: 公开了用于校正数字图像的曝光的技术。 可以基于已知地面实数数据的一组图像来生成曝光预测器。 在识别特征的最佳集合之后,可以通过从图像中提取所选择的最佳特征的值来校正数字图像的曝光,使用预测器来预测图像的期望曝光校正,以及通过以下方式校正图像的曝光: 预期的预期量。 曝光校正基于将世界光线与数字图像的RGB数字相关联的模型。 该模型包括对典型监视器的响应进行建模的伽玛函数和将世界的大动​​态范围压缩到RGB数字空间的小动态范围的S形曲线。

    Printer color correction
    2.
    发明授权
    Printer color correction 有权
    打印机颜色校正

    公开(公告)号:US07207645B2

    公开(公告)日:2007-04-24

    申请号:US10818883

    申请日:2004-04-06

    IPC分类号: B41J29/393

    CPC分类号: H04N1/6033

    摘要: Techniques are disclosed for performing color correction in a color printer. An RGB test image is printed to produce a printed calibration image. Colors in the printed calibration image are measured and compared to expected color values. A color corrector generates a printer lookup table (LUT) based on this comparison. The LUT may be generated based on models of the printer's print engine and previous LUTs. The color corrections are applied to subsequent print jobs to improve the quality of color output. Color measurement and correction may be performed using a closed-loop system contained within the printer that includes a color measurement device (such as a scanner) and a computer.

    摘要翻译: 公开了用于在彩色打印机中执行颜色校正的技术。 打印RGB测试图像以产生打印的校准图像。 测量印刷校准图像中的颜色并将其与预期颜色值进行比较。 颜色校正器基于该比较生成打印机查找表(LUT)。 LUT可以基于打印机的打印引擎和先前的LUT的模型生成。 颜色校正应用于后续打印作业,以提高颜色输出的质量。 可以使用包含在包括彩色测量装置(例如扫描仪)和计算机的打印机内的闭环系统来执行颜色测量和校正。

    Digital image exposure correction
    3.
    发明授权
    Digital image exposure correction 有权
    数字图像曝光校正

    公开(公告)号:US08265420B2

    公开(公告)日:2012-09-11

    申请号:US12874809

    申请日:2010-09-02

    IPC分类号: G06K9/40

    CPC分类号: H04N1/4072

    摘要: Techniques are disclosed for correcting the exposure of a digital image. An exposure predictor may be generated based on a set of images for which ground truth data are known. After identifying an optimal set of features, the exposure of the digital image may be corrected by extracting values of the selected optimal features from the image, using the predictor to predict a desired exposure correction for the image, and correcting the exposure of the image by the predicted desired amount. Exposure correction is based on a model that relates intensity of light in the world to the RGB digits of the digital image. The model comprises a gamma function that models the response of a typical monitor and a S-shaped curve that compresses the large dynamic range of the world to the small dynamic range of the RGB digit space.

    摘要翻译: 公开了用于校正数字图像的曝光的技术。 可以基于已知地面实数数据的一组图像来生成曝光预测器。 在识别特征的最佳集合之后,可以通过从图像中提取所选择的最佳特征的值来校正数字图像的曝光,使用预测器来预测图像的期望曝光校正,以及通过以下方式校正图像的曝光: 预期的预期量。 曝光校正基于将世界光线与数字图像的RGB数字相关联的模型。 该模型包括对典型监视器的响应进行建模的伽玛函数和将世界的大动​​态范围压缩到RGB数字空间的小动态范围的S形曲线。

    Digital image exposure correction
    4.
    发明授权
    Digital image exposure correction 有权
    数字图像曝光校正

    公开(公告)号:US07826660B2

    公开(公告)日:2010-11-02

    申请号:US11546633

    申请日:2006-10-12

    IPC分类号: G06K9/00

    CPC分类号: H04N1/4072

    摘要: Techniques are disclosed for correcting the exposure of a digital image. An exposure predictor may be generated based on a set of images for which ground truth data are known. After identifying an optimal set of features, the exposure of the digital image may be corrected by extracting values of the selected optimal features from the image, using the predictor to predict a desired exposure correction for the image, and correcting the exposure of the image by the predicted desired amount. Exposure correction is based on a model that relates intensity of light in the world to the RGB digits of the digital image. The model comprises a gamma function that models the response of a typical monitor and a S-shaped curve that compresses the large dynamic range of the world to the small dynamic range of the RGB digit space.

    摘要翻译: 公开了用于校正数字图像的曝光的技术。 可以基于已知地面实数数据的一组图像来生成曝光预测器。 在识别特征的最佳集合之后,可以通过从图像中提取所选择的最佳特征的值来校正数字图像的曝光,使用预测器来预测图像的期望曝光校正,以及通过以下方式校正图像的曝光: 预期的预期量。 曝光校正基于将世界光线与数字图像的RGB数字相关联的模型。 该模型包括对典型监视器的响应进行建模的伽玛函数和将世界的大动​​态范围压缩到RGB数字空间的小动态范围的S形曲线。

    Digital image exposure correction
    7.
    发明授权
    Digital image exposure correction 有权
    数字图像曝光校正

    公开(公告)号:US07283666B2

    公开(公告)日:2007-10-16

    申请号:US10375440

    申请日:2003-02-27

    IPC分类号: G06K9/00

    CPC分类号: H04N1/4072

    摘要: Techniques are disclosed for correcting the exposure of a digital image. An exposure predictor may be generated based on a set of images for which ground truth data are known. After identifying an optimal set of features, the exposure of the digital image may be corrected by extracting values of the selected optimal features from the image, using the predictor to predict a desired exposure correction for the image, and correcting the exposure of the image by the predicted desired amount. Exposure correction is based on a model that relates intensity of light in the world to the RGB digits of the digital image. The model comprises a gamma function that models the response of a typical monitor and a S-shaped curve that compresses the large dynamic range of the world to the small dynamic range of the RGB digit space.

    摘要翻译: 公开了用于校正数字图像的曝光的技术。 可以基于已知地面实数数据的一组图像来生成曝光预测器。 在识别特征的最佳集合之后,可以通过从图像中提取所选择的最佳特征的值来校正数字图像的曝光,使用预测器来预测图像的期望曝光校正,以及通过以下方式校正图像的曝光: 预期的预期量。 曝光校正基于将世界光线与数字图像的RGB数字相关联的模型。 该模型包括对典型监视器的响应进行建模的伽玛函数和将世界的大动​​态范围压缩到RGB数字空间的小动态范围的S形曲线。

    Platen temperature model
    8.
    发明授权
    Platen temperature model 失效
    压板温度模型

    公开(公告)号:US08077192B2

    公开(公告)日:2011-12-13

    申请号:US11969971

    申请日:2008-01-07

    IPC分类号: B41J2/00

    CPC分类号: B41J29/36 B41J2/365

    摘要: The input energies provided to a print head of a thermal printer are adjusted based on the temperature of a platen in the thermal printer. The platen temperature may be measured by a sensor or predicted by a platen temperature model. Such a model may derive the predicted platen temperature from an observed temperature of a heat sink in the thermal printer. A thermal history control algorithm may use the platen temperature, whether actual or predicted, to compensate for the platen temperature by adjusting the input energies.

    摘要翻译: 提供给热敏打印机的打印头的输入能量基于热敏打印机中的压板的温度来调节。 压板温度可以由传感器测量或由压板温度模型预测。 这种模型可以从热敏打印机中的散热器的观察温度导出预测的压板温度。 热历史控制算法可以使用压板温度,无论是实际的还是预测的,通过调节输入能量来补偿压板温度。

    Method and apparatus for controlling the uniformity of print density of a thermal print head array
    9.
    发明授权
    Method and apparatus for controlling the uniformity of print density of a thermal print head array 有权
    用于控制热打印头阵列的打印浓度均匀性的方法和装置

    公开(公告)号:US07369145B2

    公开(公告)日:2008-05-06

    申请号:US10990672

    申请日:2005-01-10

    IPC分类号: B41J2/36

    CPC分类号: B41J2/36

    摘要: A method for controlling the print density of individual heating elements of a thermal print head array determines respective energy values for each heating element in response to image pixel data to be printed, multiplies determined energy values by a respective predetermined correction factor for one or more respective heating elements for improving print density consistency between individual heating elements, and dithers adjusted energy values from the step of multiplying as a function of adjacent image pixels.

    摘要翻译: 用于控制热打印头阵列的各个加热元件的打印浓度的方法响应于要打印的图像像素数据确定每个加热元件的相应能量值,将所确定的能量值乘以一个或多个相应的各自的预定校正因子 用于改善各个加热元件之间的打印浓度一致性的加热元件,以及从作为相邻图像像素的函数的乘法步骤的抖动调整的能量值。

    Thermal response correction system
    10.
    发明授权
    Thermal response correction system 有权
    热响应校正系统

    公开(公告)号:US07298387B2

    公开(公告)日:2007-11-20

    申请号:US10910880

    申请日:2004-08-04

    IPC分类号: B41J2/00

    CPC分类号: B41J2/3555 B41J2/36 B41J2/365

    摘要: Techniques are disclosed for performing thermal history control in a thermal printer in which a single thermal print head prints sequentially on multiple color-forming layers in a single pass. Each pixel-printing interval may be divided into subintervals, which may be of unequal duration. Each sub-interval may be used to print a different color. The manner in which the input energy to be provided to each print head element is selected may be varied for each of the subintervals. For example, although a single thermal model may be used to predict the temperature of the print head elements in each of the subintervals, different parameters may be used in the different subintervals. Similarly, different energy computation functions may be used to compute the energy to be provided to the print head in each of the subintervals based on the predicted print head temperature.

    摘要翻译: 公开了用于在热打印机中执行热历史控制的技术,其中单个热打印头在单次通过中顺序地在多个成色层上打印。 每个像素打印间隔可以被划分为可能具有不等长度的子间隔。 每个子间隔可以用于打印不同的颜色。 选择提供给每个打印头元件的输入能量的方式可以针对每个子区间而变化。 例如,虽然可以使用单个热模型来预测每个子区间中的打印头元件的温度,但是不同的参数可以用于不同的子区间。 类似地,可以使用不同的能量计算功能来基于预测的打印头温度计算要在每个子区间中提供给打印头的能量。