| 摘要 |
A halftone screen generating apparatus according to a compression rate and a method thereof. The halftone screen generating apparatus includes a cost function application unit to apply a cost function to a screen where an initial pattern is set and to calculate cost values to select a candidate pixel to allocate a screen table value, a candidate pixel selection unit to select candidate pixels having a similar cost value from the cost values calculated by the cost function application unit, a compression rate comparing unit to calculate compression rates of the selected candidate pixels selected by the candidate pixel selection unit and to compare the calculated compression rates of the selected candidate pixels, and a screen table value allocation unit to allocate the screen table value to a candidate pixel having the highest compression rate of the selected candidate pixels based on the compared result of the compression rate comparing unit. Accordingly, as a compressed image size decreases, the transmission rate gets faster so that not only a printing time decreases, but also a memory of the printing apparatus can be efficiently used.
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