Apparatus and method for processing image

1. An image processing apparatus, comprising:

an image processor configured to enhance an edge of an input image, remove noise from the input image, synthesize the edge-enhanced image and the noise-removed image, and remove a high frequency from the synthesized image; and

an encoder configured to pre-encode a downsized synthesized image to obtain a pre-bit rate of the pre-encoded image, set a quantization parameter value based on a reference bit rate and the pre-bit rate, and compress the high-frequency removed image based on the quantization parameter value.

2. The image processing apparatus of claim 1 , wherein the encoder is configured to set the quantization parameter value corresponding to the reference bit rate in response to determining that the pre-bit rate is greater than a downsized reference bit rate, the downsized reference bit rate being a reference bit rate reduced by a rate in which the synthesized image is downsized to the downsized synthesized image.

3. The image processing apparatus of claim 2 , wherein, in response to the pre-bit rate being greater than the downsized reference bit rate, the encoder is configured to set the quantization parameter value to be greater than a current quantization parameter value.

4. The image processing apparatus of claim 2 , wherein, in response to the determining that the pre-bit rate is equal to or less than the downsized reference bit rate, the encoder is configured to maintain a current quantization parameter value.

5. The image processing apparatus of claim 1 , wherein, in response to detecting an event in the input image, the image processor is configured to increase a cutoff frequency to remove the high frequency from the synthesized image.

6. The image processing apparatus of claim 1 , wherein, in response to detecting an event in the input image by the image processor, the encoder is configured to increase a frame rate of the high-frequency removed image.

7. The image processing apparatus of claim 1 , wherein the encoder is configured to obtain a current bit rate of a current image, and in response to determining that the current bit rate is greater than the reference bit rate, the image processor is configured to increase at least one of an edge enhancement level, a noise removal level, and a cutoff frequency level to remove the high frequency, with respect to a next image.

8. The image processing apparatus of claim 1 , wherein, in response to detecting an event in the input image by the image processor, the encoder is configured to insert an I frame to compress the high-frequency removed image.

9. The image processing apparatus of claim 1 , wherein, in response to detecting an event in the input image by the image processor, the encoder is configured to increase the quantization parameter value.

10. The image processing apparatus of claim 1 , wherein, in response to detecting an event in the input image by the image processor, the encoder is configured to decrease the quantization parameter value of an area in which the event is detected.

11. An image processing apparatus, comprising:

an image processor configured to enhance an edge of an input image, remove noise from the input image, synthesize the edge-enhanced image and the noise-removed image, and remove a high frequency from the synthesized image; and

an encoder configured to compress the high-frequency removed image,

wherein, in response to detecting an event in the input image, the image processor is configured to increase a cutoff frequency to remove the high frequency from the synthesized image.

12. The image processing apparatus of claim 11 , wherein, in response to detecting the event by the image processor, the encoder is configured to increase a frame rate to compress the high-frequency removed image.

13. The image processing apparatus of claim 11 , wherein the encoder is configured to obtain a current bit rate of a current image, and in response to determining that the current bit rate is greater than a reference bit rate, the image processor is configured to increase at least one of an edge enhancement level, a noise removal level, and a cutoff frequency level to remove the high frequency, with respect to a next image.

14. The image processing apparatus of claim 11 , wherein the event comprises at least one of a movement of an object, a change of a scene, generation of noise, a movement of a background, panning of a camera module, tilting of the camera module, zooming of the camera module, and detection of a human face in the input image.

15. An image processing method, comprising:

enhancing, by an image processor, an edge of an input image;

removing, by the image processor, noise from the input image;

synthesizing, by the image processor, the edge-enhanced image and the noise-removed image;

removing, by the image processor, a high frequency from the synthesized image;

increasing, by an encoder, a frame rate in response to detecting an event in the input image by the image processor; and

compressing, by the encoder, the high-frequency removed image based on the increased frame rate.

16. The image processing method of claim 15 , further comprising:

obtaining, by the encoder, a current bit rate of the input image; and

in response to determining that the current bit rate is greater than a predetermined reference bit rate, increasing, by the image processor, at least one of an edge enhancement level, a noise removal level, and a cutoff frequency level to remove the high frequency, with respect to a next image.