| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image data compression/restoration method capable of performing compression and restoration, more efficiently. <P>SOLUTION: In a data compression process, interpolation information to be used is generated, when pixels (P<SB>11</SB>, P<SB>13</SB>, P<SB>22</SB>, P<SB>24</SB>, P<SB>31</SB>, P<SB>33</SB>) that are the objects of thinning, when thinning image data (A) into the shape of a checker are restored, and the interpolation information is embedded in the information on the pixel values of pixels around the object pixels (P<SB>11</SB>, P<SB>13</SB>, P<SB>22</SB>, P<SB>24</SB>, P<SB>31</SB>, P<SB>33</SB>), only when the pixel values of the surrounding pixels satisfy predetermined conditions. In a data restoration process, interpolation of pixels is performed as objects of restoration, and restored image data (B) are generated, by referring to the interpolation information embedded in the information on the pixels values of the pixels, when the pixel values of pixels (P<SB>12</SB>', P<SB>14</SB>', P<SB>21</SB>', P<SB>23</SB>', P<SB>32</SB>', P<SB>34</SB>') in compressed data (B) that are to be the pixels around those pixels as objects of restoration satisfy the predetermined conditions, and without referring to the interpolation information, when the pixel values do not satisfy the condition, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT |
