 Digital wireless home computer system |
| The present invention provides a digital wireless home computer system. One embodiment of the ... |
|
| Method and apparatus for digital data compression |
| In one embodiment, a method for enhancing the quality of digital images recovered from compressed ... |
|
| Method and apparatus for digital data compression |
| In one embodiment, a method for enhancing the quality of digital images recovered from compressed ... |
|
| Method and apparatus for digital data compression |
| In one embodiment, a method for enhancing the quality of digital images recovered from compressed ... |
|
| Method and apparatus for digital data compression |
| In one embodiment, a method for enhancing the quality of digital images recovered from compressed ... |
|
| Method and apparatus for reducing noise during lossy transformation processes |
| Processing digital information made up of a plurality of n-bit samples is performed by raising each ... |
|
| Manual bar code scanner with improved reliability |
| The present invention overcomes the deficiencies in the art by providing a manual bar code scanner ... |
|
| Image processing with anti-forgery function |
| What is claimed is: 1. An image discriminating apparatus which is independently arranged from an ... |
|
|
Image processing apparatus and method
| Details |
Inventors: Sumiuchi, Kazuyoshi;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Tran; Douglas Q.
Assistant Examiner:
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto
In a color ink-jet printer using seven colors of ink including C, M, Y and K and c, m and y having low density, the data size of a conversion table used in color conversion is large. In view of this, compressed conversion table data, having compressed grid point data of a conversion table arranged by color components which are used to construct image data, is stored in a compressed data buffer. Then, the compressed conversion table data is expanded by a data restoration unit. Then, color conversion processor performs color conversion on inputted image data by interpolation operation based on the expanded conversion table data. |
|
DETAILED DESCRIPTION The present invention is made in consideration of the above situation, and has as its object to provide an image processing apparatus and method thereof which can keep the memory capacity necessary for storing a conversion table for image data conversion small, and a recording medium.
To attain the above object, the present invention provides an image processing apparatus for generating image data to be outputted by using data conversion, the apparatus comprising: first storage means for storing compressed conversion table data having compressed grid point data of a conversion table arranged by color components which are used to construct the image data to be outputted; expansion means for expanding the compressed conversion table data; and conversion means for performing the data conversion by interpolation operation based on the expanded conversion table data.
Furthermore, the present invention provides an image processing method for generating image data to be outputted by using data conversion, the method comprising the steps of: expanding compressed conversion table data having compressed grid point data of a conversion table arranged by color components which are used to construct the image data to be outputted; and performing the data conversion by interpolation operation based on the expanded conversion table data.
Furthermore, the present invention provides a data processing method for processing data used in data conversion, the method comprising the steps of: inputting conversion table data where combinations of plural color component data are arranged by grid points; sorting the conversion table data in a color component unit; and compressing the sorted conversion table data.
Other features and advantages of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof.
|
|
Image Analysis 
