Digital image processing apparatus to simulate auto-focus, method of controlling the apparatus, and recording medium having recorded thereon a program for executing the method

1. A digital image processing apparatus comprising: a lens;

a photographing device that obtains data of a through image from light which has passed through the lens; and

a digital signal processor that:

prior to receiving a shutter-release signal, sequentially performs a blurring treatment on the through image obtained from the photographing device,

sequentially displays the blurred image and the through image to simulate an auto-focus, and

upon receiving the shutter-release signal, stores an image on a storage medium.

2. The digital image processing apparatus of claim 1 , wherein the digital signal processor sequentially performs the blurring treatment so that the image is gradually displayed clearly.

3. The digital image processing apparatus of claim 1 , wherein the digital signal processor displays the image while sequentially reducing the amount of blurring treatment performed on the image.

4. The digital image processing apparatus of claim 1 , wherein the digital signal processor combines a screen in which the blurring treatment is performed on the through image and an on-screen display (OSD) screen in which a focusing screen is displayed.

5. The digital image processing apparatus of claim 1 , wherein the digital signal processor comprises:

a through image processor that performs the blurting treatment on the through image;

an on-screen display (OSD) processor that creates a focusing screen; and

an image combiner that combines the image blurred in the through image processor and the focusing screen created in the OSD processor.

6. The digital image processing apparatus of claim 5 , wherein the through image processor performs the blurting treatment so that the sharpness of the through image is sequentially changed.

7. The digital image processing apparatus of claim 5 , wherein the OSD processor sequentially changes at least one of brightness, color, or chroma of the focusing screen.

8. The digital image processing apparatus of claim 5 , comprising a plurality of the focusing screens that are user selectable.

9. The digital image processing apparatus of claim 5 , wherein the focusing screen comprises a plurality of layers.

10. The digital image processing apparatus of claim 9 , wherein the focusing screen comprises at least one of a focus area display layer for displaying a focus area or a composition display layer for displaying a composition of an image.

11. The digital image processing apparatus of claim 1 , wherein the digital signal processor performs the blurring treatment on the through image by using at least one of an average filter, a median filter, or a Gaussian filter.

12. A method of controlling a digital image processing apparatus, the method comprising:

obtaining data of an through image from a photographing device;

prior to receiving a shutter-release signal, performing a blurring treatment on the obtained through image,

sequentially displaying the blurred image and the through image to simulate an auto-focus, and

upon receiving the shutter-release signal, storing an image on a storage medium.

13. The method of claim 12 , wherein the sequential performing of the blurring treatment and the displaying of the image comprises sequentially performing the blurring treatment on the through image so that the image is gradually displayed clearly.

14. The method of claim 12 , wherein the sequential performing of the blurring treatment and the displaying of the image comprises displaying the image by sequentially reducing the amount of blurring treatment.

15. The method of claim 12 , wherein the sequential performing

of the blurring treatment and the displaying of the through image comprises: performing a blurting treatment on the obtained through image; creating a focusing screen; and combining the blurred image and the created focusing screen.

16. The method of claim 15 , wherein the performing of the blurring treatment comprises performing the blurring treatment so that the sharpness of the through image is sequentially changed.

17. The method of claim 15 , wherein the obtained through image is sequentially blurred, and at the same time, at least one of brightness, color, or chroma of the focusing screen is sequentially changed.

18. The method of claim 15 , wherein the focusing screen comprises a plurality of layers.

19. The method of claim 15 , wherein the performing of the blurting treatment is performed on the through image by using at least one of an average filter, a median filter, or a Gaussian filter.

20. A computer program product, comprising a non-transitory computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method for controlling a digital image processing apparatus, the method comprising:

obtaining data of an through image from a photographing device;

prior to receiving a shutter-release signal, sequentially performing a blurring treatment on the obtained through image,

sequentially displaying the blurred image and the through image to simulate an auto-focus, and

upon receiving the shutter-release signal, storing an image on a storage medium.