CN1801888A - Method for realizing picture background transformation in digital camera - Google Patents

Abstract

The invention relates to a method for realizing picture background conversion on a digital camera. The digital camera has software with a digital blue screen matting function, which first selects a foreground object whose background is a solid color; then selects the background color on the digital camera; Then use the selected background color as the background of the current shooting, and then shoot; then key the current photo on the digital camera; then call the desired background; finally get the key and adjustment of the foreground object Synthesize the taken background to generate a new picture. Through the above method, the digital camera can be used to convert the background of the picture, which increases the attractiveness of the digital camera to users.

Description

A Method of Realizing Image Background Transformation on Digital Camera

technical field

The invention relates to a method for realizing picture background conversion on a digital camera.

Background technique

Nowadays, the functions of digital cameras are becoming more and more powerful. Megapixels, AE, AF, etc. have greatly improved the quality of photos. Digital cameras are not only satisfied with instant wonderful captures, but are also moving towards professional and interesting image photography. However, most of the digital cameras currently on the market can only meet the functions of taking "normal" photos, but cannot directly realize some special effects such as color changing and adding frames on the digital camera.

With the advancement of digital technology, channel extraction (Matte Extraction) has become an important function of digital synthesis. Many film and television works create wonderful picture effects by superimposing the content shot in the studio and the content shot on location in the way of channel extraction. We often refer to channel extraction as keying. The so-called matting technology is to embed the picture images taken indoors into the moving pictures of the outdoor pictures and other program materials, that is, to superimpose the people or real objects captured by the camera on other images, so that the two are fused into a new image. screen. Blue Screen technology (Blue Screen) is the most important means of extracting channels. After shooting people or other foreground content, it uses the difference in chroma to remove the monochrome background. In principle, as long as the color used for the background does not exist in the foreground picture, any color can be used as the background, but in fact, the most commonly used are blue background and green background. The reason is that these two colors are not included in the natural color of the human body, and using them as the background will not mix with the characters; at the same time, these two colors are the primary colors in the RGB system, which is also easier to handle.

The current digital cameras are not combined with the blue screen keying technology, and cannot perform real-time background replacement processing. Users need to transfer the foreground photos taken in front of the blue screen to the PC for keying processing, and then combine them with the outdoor photos taken. Synthesize to achieve.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method for realizing picture background conversion on a digital camera, which can increase the attractiveness of the digital camera to users.

Technical problem of the present invention adopts following technical scheme to realize: a kind of method that realizes picture background conversion on digital camera, has the software of digital blue screen matting function on described digital camera, and it comprises the following steps:

The first step is to select a foreground object whose background is a solid color;

The second step is to select the background color on the digital camera;

The third step is to take the selected background color as the background of the current shooting;

The fourth step is to key the currently captured photos on the digital camera;

The fifth step is to call the desired background;

The sixth step is to synthesize the keyed image of the foreground object and the retrieved background to generate a new picture.

Compared with the prior art, the beneficial effect of the present invention is that the digital camera can be used to convert the picture background, which increases the attractiveness of the digital camera to users.

Description of drawings

The accompanying drawing is a flowchart of a method for realizing picture background conversion on a digital camera according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to the accompanying drawings, the present invention realizes the method for image background conversion on a digital camera, at first adding a "BlueScreen" functional module in the digital camera, after entering the functional module, perform the following operations, at first import the material, start Before keying, you must first use tools to import the foreground and background of the material that needs to be keyed into the workflow, then select the keying color, use the eyedropper tool to select the color to be keyed out (blue by default), and then isolate, isolation is to key out The main body and the background basket are initially isolated. After choosing the blue color of the background, the foreground characters can be isolated from the blue color of the background, and then the noise of the foreground image can be cleaned up. Next, select the background image, perform noise processing on the background image, and then superimpose, superimpose the foreground figure isolated from the background blue with the background image, and then perform transparency. In the isolated foreground object range, transparency needs to be processed first area. Objects in this category include glass, tulle, liquids, and more. At this time, select the Transparency tab on the digital camera and switch to the transparent area adjustment mode. The view is now displayed in transparent range mode. The blue is completely transparent, and the black part is completely opaque. Increase the value of the Threshold and Strength parameters, respectively, to adjust the range and transparency of the transparent area of the image. Blur, Shrink, and Edge adjust the blur, zoom, and edge blur of opaque areas, respectively. Finally, shadow processing is performed, and shadows are very easy to be ignored during the keying process. In "BlueScreen", the shadow part of the foreground figure is processed from the shadow density, shadow brightness, shadow smoothing, and foreground shadow color; after the transparency and shadow processing, the entire blue screen and the blue reflection disappear without a trace , the character's skin and translucent areas, shadows, and highlights are restored very delicately, and the final picture is obtained.

To sum up, the present invention fulfills the purpose of the inventors, can use a digital camera to convert the background of a picture, and increases the attractiveness of the digital camera to users.

Claims (7)

1. a method that realizes the picture background conversion on digital camera has the blue curtain of numeral and scratches the software of picture function on the described digital camera, and it may further comprise the steps:

The first step is chosen the foreground object that background is a pure color;

In second step, on digital camera, select background colour;

In the 3rd step,, take the background of the background colour after the choosing as current shooting;

In the 4th step, on digital camera, the photo of current shooting is scratched picture;

In the 5th step, transfer the background of wanting;

The 6th step, the stingy picture that obtains foreground object is synthetic with the background of transferring, generate new picture.

2. the method that realizes the picture background conversion on digital camera as claimed in claim 1 is characterized in that: described the 4th step can with the 5th step reversed order.

3. the method that realizes the picture background conversion on digital camera as claimed in claim 1 or 2 is characterized in that: the step that also has cleaning background noise after described the 5th step.

4. the method that realizes the picture background conversion on digital camera as claimed in claim 1 or 2 is characterized in that: the step that also has cleaning prospect noise after described the 4th step.

5. the method that realizes the picture background conversion on digital camera as claimed in claim 1 is characterized in that: choose background colour for blue on digital camera in described second step.

6. the method that realizes the picture background conversion on digital camera as claimed in claim 1 is characterized in that: choose background colour for green on digital camera in described second step.

7. the method that realizes the picture background conversion on digital camera as claimed in claim 1 is characterized in that: also have one after described the 6th step and go on foot the step of carrying out transparency, Shadows Processing.