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    • 92. 发明公开
    • Display method and apparatus
    • Anzeigeverfahren und-gerät
    • EP0689353A2
    • 1995-12-27
    • EP95109722.9
    • 1995-06-22
    • CANON KABUSHIKI KAISHA
    • Sunakawa, ShinichiShimada, KazutoshiTatsumi, EisakuMori, ShigekiMatsubayashi, KazuhiroHarada, TakashiNagasaki, KatsuhikoFukuda, Ryoji
    • H04N5/74
    • H04N9/3185H04N5/7416H04N9/3194
    • According to the invention, on the basis of a deviation between an optical axis direction of a projection light and a normal line direction of a projection plane, image data can be changed and displayed so as to set off a distortion of a display image which occurs due to such a deviation. A quality of the display image is raised and a use efficiency is improved. In the invention, the image data is constructed by (m × n) pixels, the left upper position is set to an origin, an X axis is set to the lateral direction, and a Y axis is set to the vertical direction. A quadrangle ABCD corresponds to mapping data of an image stored in a memory. For example, in the case where the projection plane is inclined and the display image on the projection plane is enlarged as it approaches the right, the image is changed like a quadrangle ABEF. Namely, the image data is changed while increasing a reduction ratio in the vertical direction toward the right of the image. By projecting such changed image data onto the projection plane, the distortion occurring by the projection and the distortion on the mapping data are set off, so that an image without a distortion is displayed.
    • 根据本发明,基于投影光的光轴方向与投影面的法线方向的偏差,可以改变和显示图像数据,以便发出出现的显示图像的失真 由于这种偏差。 提高显示图像的质量,提高使用效率。 在本发明中,由(m×n)个像素构成图像数据,将左上位置设定为原点,将X轴设定为横向,将Y轴设定为垂直方向。 四边形ABCD对应于存储在存储器中的图像的映射数据。 例如,在投影平面倾斜并且投影平面上的显示图像接近右侧的情况下扩大的情况下,像ABEF四边形那样改变图像。 即,改变图像数据,同时增加朝向图像右侧的垂直方向的缩小率。 通过将这种改变的图像数据投影到投影平面上,通过投影发生的失真和映射数据上的失真被设置,使得不显示失真的图像。