Image forming apparatus and method for image forming

1. An image forming apparatus, comprising:

an image former to transfer toner to an image forming medium, the image former to form an image based on image-forming data by transferring toner to the image forming medium;

a sensor to detect a toner concentration of the toner transferred to the image forming medium; and

a processor to:

determine one or a combination of a coring level or a total area coverage (TAC) level, according to the detected toner concentration, and

in response to the one or the combination of the determined coring level or the determined TAC level, control rendering the image-forming data according to at least one of the determined coring level and/or the determined TAC level, such that the image former is to form the image based on the rendered image-forming data.

2. The image forming apparatus as claimed in claim 1 , wherein, in response to the image-forming data including a text object and the determined coring level, the processor controls rendering the text object included in the image-forming data by inserting a coring pattern in the text object according to the determined coring level.

3. The image forming apparatus as claimed in claim 2 , wherein, while the processor controls rendering the text object included in the image-forming data, the processor

determines the coring pattern based on a font type and/or a font size of the text object,

determines a number of patterns to be inserted based on the determined coring pattern and the coring level, and

controls rendering the determined coring pattern by inserting the determined number of coring patterns in the text object.

4. The image forming apparatus as claimed in claim 1 , wherein, in response to the determined TAC level, the processor controls rendering the image-forming data by reducing an amount of CMY toner and an amount of K toner based on the determined TAC level with respect to a graphic object and a photo object among the image-forming data.

5. The image forming apparatus as claimed in claim 1 , wherein, in response to the determined TAC level, the processor converts an RGB color within the image-forming data to a CMYK color value using a color conversion table corresponding to the determined TAC level.

6. The image forming apparatus as claimed in claim 1 , wherein the processor

determines an image-forming gamma level based on the detected toner concentration, and

performs gamma adjustment to reflect the determined image-forming gamma level in the rendered image-forming data.

7. The image forming apparatus as claimed in claim 1 , wherein:

the image forming medium includes a plurality of photosensitive drums, and

the sensor detects a toner concentration of the toner transferred to at least one photosensitive drum from among the plurality of photosensitive drums using at least one registration sensor to arrange a color registration of the plurality of photosensitive drums.

8. The image forming apparatus as claimed in claim 7 , wherein the processor

determines the coring level based on a detected toner concentration of the toner transferred to a K photosensitive drum from among the plurality of photosensitive drums, and

determines the TAC level based on the detected toner concentration of the toner transferred to each photosensitive drum from among the plurality of photosensitive drums.

9. A method for an image forming apparatus, the method comprising:

transferring toner, by an image former, to an image forming medium;

detecting, by a sensor, a toner concentration of the toner transferred to the image forming medium;

by a processor:

determining one or a combination of a coring level or a total area coverage (TAC) level, based on the detected toner concentration, and

in response to the one or the combination of the determined coring level or the determined TAC level, controlling rendering image-forming data based on at least one of the determined coring level and/or the determined TAC level; and

by the image former, forming an image based on the rendered image-forming data.

10. The method as claimed in claim 9 , wherein the controlling rendering the image-forming data based on the determined coring level comprises, in response to the image forming data including a text object, controlling rendering the text object included in the image-forming data by inserting a coring pattern in the text object based on the determined coring level.

11. The method as claimed in claim 10 , wherein the controlling rendering the text object included in the image-forming data comprises:

determining a coring pattern based on at least one of a font type and/or a font size of the text object,

determining a number of patterns to be inserted based on the determined coring pattern and the coring level, and

controlling rendering the determined coring pattern by inserting the determined number of coring patterns in the text object.

12. The method as claimed in claim 9 , wherein the controlling rendering the image-forming data based on the determined TAC level comprises controlling rendering by reducing an amount of CMY toner and an amount of K toner based on the determined TAC level with respect to a graphic object and a photo object among the image-forming data.

13. The method as claimed in claim 9 , wherein the controlling rendering the image-forming data based on the determined TAC level comprises converting an RGB color within the image-forming data to a CMYK color value using a color conversion table corresponding to the determined TAC level.

14. The method as claimed in claim 9 , wherein the determining the one or the combination of the coring level or the TAC level comprises determining the image-forming gamma level based on the detected toner concentration, and

wherein the method further comprises performing adjustment to reflect the determined image-forming gamma level with respect to the rendered image-forming data.

15. The method as claimed in claim 9 , wherein

the image forming medium includes a plurality of photosensitive drums

the sensing the toner concentration comprises sensing a toner concentration of the toner transferred to each photosensitive drum from among the plurality of photosensitive drums using at least one registration sensor to arrange a color registration of the plurality of photosensitive drums.

16. The method as claimed in claim 15 , wherein the determining the at least one of the coring level and/or the TAC level comprises:

determining the coring level based on a toner concentration of the toner transferred to a K photosensitive drum from among the plurality of photosensitive drums, and

determining the TAC level based on the detected toner concentration of the toner transferred to each photosensitive drum from among the plurality of photosensitive drums.

17. A non-transitory computer-readable recording medium comprising a computer-executable program for executing a method for an image forming apparatus, the method comprising:

transferring toner, by an image former, to an image forming medium;

detecting a toner concentration of the toner transferred to the image forming medium, by a sensor;

determining one or a combination of a coring level or a total area coverage (TAC) level, based on the detected toner concentration;

in response to the one or the combination of the determined coring level or the determined TAC level, rendering image-forming data based on at least one of the determined coring level and/or the determined TAC level; and

by the image former, forming an image based on the rendered image-forming data.