Image processing device and image processing method
    23.
    发明授权
    Image processing device and image processing method 失效
    图像处理装置及图像处理方法

    公开(公告)号:US07283683B1

    公开(公告)日:2007-10-16

    申请号:US09600936

    申请日:1998-11-20

    IPC分类号: G06K9/40 G06K9/34

    摘要: In an image processing device, in order to display an image on a display device having nonlinear gradation characteristics, first, a contrast estimation unit (37) estimates the contrast of the image represented by the image data (51) input from an image input device. Next, a luminance correction unit (38) subjects the pixel data constituting the image data (51) to a luminance conversion process on the basis of the estimated contrast and the gradation characteristics. Furthermore, the pixel data may sometimes be subjected to a sharpening process. The level of the sharpening performed for one or a plurality of character regions in the image represented by the image data (51) is higher than that for the pixel data of the pixels in remaining regions other than the character regions in the image. The image data (52) comprising the pixel data subjected to these processes is supplied to the display device. Therefore, the visibility of the image displayed on the display device can be improved.

    摘要翻译: 在图像处理装置中,为了在具有非线性灰度特性的显示装置上显示图像,首先,对比度估计单元(37)首先估计由图像输入装置输入的图像数据(51)表示的图像的对比度 。 接下来,亮度校正单元(38)基于估计的对比度和灰度特性,对构成图像数据(51)的像素数据进行亮度转换处理。 此外,像素数据有时可以进行锐化处理。 在由图像数据(51)表示的图像中对一个或多个字符区域进行的锐化的电平高于除图像中的字符区域之外的剩余区域中的像素的像素数据。 包括经过这些处理的像素数据的图像数据(52)被提供给显示装置。 因此,可以提高显示在显示装置上的图像的可视性。

    Printer having identifiable interchangeable heads
    25.
    发明授权
    Printer having identifiable interchangeable heads 失效
    打印机具有可识别的可互换头

    公开(公告)号:US5049904A

    公开(公告)日:1991-09-17

    申请号:US458885

    申请日:1989-12-29

    CPC分类号: B41J25/34

    摘要: A printer devised so as to function both as a thermal printer and as an ink-jet printer. The printer having a thermal printing head cartridge, an ink-jet printing head cartridge, a cartridge holder, an electronic circuit and a sensor for identifying a printing head cartridge in use. If one of the above two kinds of printing head cartridges is optionally selected and mounted on the cartridge holder, the sensor outputs a signal of identifying which one of the printing head cartridges is mounted. Receiving the signal, the electronic circuit supplies to a printing head cartridge mounted on the cartridge holder pulse currents suitable for the specific resistors installed in the printing head cartridge for making the same function as a printing head.