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AssigneeSeiko Epson Corporation
InventorsShoji Kojima, Kiyoharu Momose, Yoichiro Maki, Shinobu Tsukui
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An image processing device that processes input image data includes: an image dividing unit that divides the input image data into a plurality of blocks; an image type determining unit that determines the type of the input image data for every block on the basis of the number of edge elements included in the block; a frequency component conversion unit that converts color components of the input image data into frequency components for every block; and an image compression unit that compresses corresponding image data for every block by specifying unnecessary components of the converted frequency components of the image data on the basis of the determined type of the image data and suppressing or removing the specified unnecessary components.
An image processing method for compressing an image, the method comprising:
An image processing device for compressing an image, the device comprising:
13 The device of claim 11, wherein the blocks are derived from text, and compressing includes a text adjustment operation which determines directions of edge components through a pattern matching operation and removes unnecessary frequency components based on directions of edge components.
The device of claim 13, wherein the text is determined to be monochrome text, and only brightness components of the color components are converted into frequency components for each monochrome text derived block.
Dependencies are inferred from the claim text.