JPH0398173A - Method and device for image synthesizing process - Google Patents

Abstract

PURPOSE:To synthesize an image without re-making a mask despite the shift of the synthesizing position of an inserted image by putting the inserted image into the rear side of an optional area of a background image for synthesization of an image not synthesizing the inserted image in an area of an inhibited mask image having the picture element value '1'. CONSTITUTION:A mask production process part 4 produces a mask binary images to an inserted image and a background image respectively. An inserted mask image storage part 5 limits an insertion grant mask as a mask attribute and stores a binary image. An inhibited mask image storage part 6 stores a mask binary image having an attribute to inhibit the synthetic image produced to the background image. A synthesizing process part 7 synthesizes the inserted image of a storage part 2 only in an area having the picture element value '1' of the inhibited mask binary image of the part 5. At the same time, the inserted image is not synthesized in an area having the picture element value '1' of the inhibited mask binary image of the part 6. Thus the inserted image is synthesized with the background image. As a result, a synthetic image is obtained without re-making a mask despite the change of the synthesizing position of the inserted image.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device, and more particularly to an image synthesis processing device capable of cutting and combining multivalued images. [Prior Art] Conventionally, image editing processing apparatuses that handle multivalued images obtained by inputting color or monochrome photographs using a scanner or the like are equipped with a function of composing two images. Simply put, this compositing processing function is a function of combining two images into one image.

This conventional method will be explained with reference to FIG. 12 and FIGS. 2 to 5. For example, an image 16 of a car as shown in FIG.
Let's consider tree image 17 as shown in Figure 3. The user combines these two images to create a composite image 19 as shown in FIG. 5. At this time, as can be seen from FIG. 3, the tree image 17 is in the background of the car, so it is called a background image.

For the car, only the body part is selected and inserted. The image that is inserted into the background image in this way is called an inserted image. In addition, in order to synthesize only the body part of the car image 16, a two-dimensional image as shown in FIG. A value image 18 is prepared in advance, and by copying only the pixel value 1 part of this binary image 18, the pixels of the car image 16 to the tree image 17, only the body part is cut out and the tree image is created. 17 is synthesized.

A binary image in which the pixel value of the part that is allowed to be combined is 1 is called a mask image. The mask image creation function is provided in the image synthesis processing device, and displays the image 16 of the car on the display and displays the cursor mark at the same time. A cursor mark is moved to the outline of the car using a mouse (or digitizer), and a line is drawn on the outline by pressing the mouse button. If you cut out the outline as one bag,
A binary mask image is created by setting the pixel value to 1.

FIG. 12 shows a block diagram of an example of such an image processing device.

In FIG. 12, 9 is a control device, 10 is an insertion image storage section, 11 is a background image storage section, 12 is a mask creation processing section,
13 is a mask image storage section, 14 is a composition processing section, and 15 is an output device. The insertion image storage section 10 and the background image storage section 11 are both storage devices that store multivalued image data, and the mask creation processing section 12 is a processing device that creates a binary mask image in an interactive format, and a mask image storage section. 13 is a mask creation processing unit 12
The compositing processing unit 14 is a storage device that stores the binary mask image indicating the compositing permitted area created in This is a processing device that copies an insertion image stored in an insertion image storage unit 10 limited to an area with a pixel value of 1.

For example, the car image 16 in FIG. 2 is replaced by the two tree images 1 in FIG.
7 to create the composite image 19 shown in FIG.
The image of the tree serving as the background is stored in the spine image storage section 11. Here, in order to cut out only the car portion of the inserted image 16 and combine it with the background image 17, a binary image 18 is created in which the area where combination is permitted has a pixel value of 1 as shown in FIG. This binary image 18 is created by the mask creation processing section 12 shown in FIG. The mask creation processing unit 12 displays an inserted image and a cursor mark on the display, moves the cursor mark with a mask (or digitizer) to the outline of the area to be cut out, and cuts out the outline while holding down the mouse button. When it becomes a bag, create a binary mask by setting the inside to 1. The resulting binary mask 18 is stored in the mask image storage section 13 shown in FIG.

When compositing the inserted image 16 with the background image 17, the compositing processing unit 14 in FIG. When pixels are copied to the background image 17, the overwritten pixels on the background image disappear and are replaced with pixels of the inserted image. As a result, the two images are combined with a mask.

[Problem to be solved by the invention]

However, in the above method, the composite image 20 in FIG.
For example, when compositing a car behind a tree, the seventh
As shown in binary mask 21 in the figure, it is necessary to create a binary mask in advance where the tree trunk part does not have a pixel value of 1, and if the composite position of the car shifts, a binary mask that allows insertion is created again. It had the disadvantage that it had to be redone. An object of the present invention is to create a composite image 20 such as the composite image 20 in FIG. 6 without having to recreate the binary mask 21 in FIG. 7 even if the composite position of the car is changed.
The disadvantage is that the image synthesis processing method and apparatus make it possible to create images.

[Means to solve the problem]

The configuration of the image synthesis processing device of the present invention includes: an insertion image storage unit that stores an insertion image for compositing two images; a background image storage unit that stores a background image on which the insertion image is combined; a mask creation processing unit that interactively creates a binary image in which pixel values in arbitrary areas of the background image are set to 1; and an insertion unit that stores a mask binary image for the insertion image created by the mask creation processing unit. a mask image storage section, a prohibition mask image storage section that stores a mask binary image for the background image created by the mask creation processing section, and a pixel value 1 of the mask binary image on the insertion mask image storage section. A compositing processing section is provided for compositing the region with the background image and not compositing the insertion image in the region of pixel value 1 of the mask binary image on the prohibition mask image storage section. The prohibition mask image storage section has a binary mask that prohibits composition on the other hand, and when the synthesis processing section performs composition, the insertion image is not composed in the area of pixel value 1 of the prohibition mask image. By doing so, it is possible to insert and synthesize the inserted image behind an arbitrary area of the background image.

〔Example〕

Examples of the present invention will be described below from FIGS. 1 and 2 to 10.
This will be explained with reference to the figures.

FIG. 1 shows a block diagram of an embodiment of the present invention. In FIG. 1, the insertion image storage section 2 and the background image storage section 3 are the same processing devices as the insertion image storage section 10 and the background image storage section 11 in the conventional example shown in FIG. Mask creation processing unit 1 of the conventional example shown in the figure
In addition to creating a mask binary image for the inserted image as shown in FIG. 2, the insertion mask image storage unit 5 is a processing device that can also create a mask binary image for the background image. The mask image storage unit 6 stores a mask binary image in the same way as the mask image storage unit 13 of the conventional example, but the storage device and prohibition mask image storage unit 6 stores the binary image with insertion permission/mask as the attribute of the mask. The compositing processing unit 7, which is a storage device that stores a mask binary image created for the image and which has an attribute that prohibits compositing, converts the inserted image in the inserted image storage unit 2 to the inserted masked image stored in the inserted mask image storage unit 5. Control such that only the region of the pixel value 1 of the insertion mask binary image is synthesized, and the insertion image is not synthesized in the region of the pixel value 1 of the prohibition mask binary image on the prohibition mask image storage unit 6. This is a processing device that combines an inserted image with a background image.

The operation will be explained below.

For example, in the same way as when explaining the conventional example of FIG. 12, only the car portion of the inserted image 16 of FIG. 2 is cut out and combined with the background image 17 of FIG. 3.

At this time, consider a composition in which there is a car behind the tree. As explained in the conventional example, the insertion image 16 and the background image 17 are each stored in a dedicated storage device, and the insertion mask binary image 18 shown in FIG. It is stored in section 13.

Here, the background image 17 is further read into the mask creation processing section 12 shown in FIG. 1, and the mask binary image 20 shown in FIG. 8 is created. In this mask binary image 20, areas on the background image 17 where synthesis is not permitted are set to a pixel value of 1. In the composition processing unit 14, the inserted image 16 is converted into a background image 17.
When compositing, first, the insertion mask binary image 18 and the mask binary image 20 that prohibits background compositing are read and a logical product (AND) is performed between the mask binary images.

As a result, only the portion where both masks overlap has a pixel value of 1 and remains, as shown in the mask binary image 21 in FIG. Furthermore, with this mask binary image 21 and the inserted mask binary image 18,
By performing an exclusive OR (EXOR), an insertion mask binary image 21 is created in which the trunk portion of the tree is not synthesized as shown in FIG. If the inserted image l6 is synthesized with the background image 17 using this inserted mask binary image 21, the synthesized image 2 shown in FIG.
0 can be created. Further, by using an image composition processing apparatus such as the present invention, even if the composition position of the car is changed, the car can be easily composited behind the tree.

For example, even if the insertion position of the car is shifted as shown in the composite image 22 of FIG. 10, the composite processing unit 7 will convert the inserted mask 18 and prohibition mask 20, which are stored separately each time, to the composite image 22 shown in FIG. 11. Since the final insertion mask 23 is recreated, the composite image 22 shown in FIG. 10 can be output immediately.

〔Effect of the invention〕

By using the present invention as explained above,
When compositing is performed on an image compositing processing device, special compositing such as inserting an inserted image behind an arbitrary area on the background image can be performed instantly, and even if the compositing position of the inserted image is shifted, the compositing can be performed without having to recreate the mask. becomes possible.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment for performing multi-value image synthesis according to the present invention, Figs. 2 to 11 are diagrams for explaining the multi-value image synthesis method, and Fig. 12 is based on the conventional method. FIG. 2 is a block diagram of an example of multivalued image synthesis.

Claims (1)

[Claims] An inserted image in the synthesis of 1 and 2 images and a background image on which the inserted image is synthesized are respectively stored, and the pixel values of arbitrary areas of these inserted images and background images are set to 1 in an interactive manner. create a mask binary image for the created insertion image as an insertion mask, store the created mask binary image for the background image as a prohibition mask, The region of pixel value 1 of the mask binary image stored for the insertion mask is synthesized with the stored background image, and the region of pixel value 1 of the mask binary image stored for the prohibition mask is combined with the pixel value 1 of the mask binary image stored for the prohibition mask. Synthesis is performed so that the insertion image is not composited, and a binary mask that prohibits composition with respect to the background image is included together with data stored for the prohibition mask, and when performing the composition, the prohibition is performed. By not compositing the insertion image in a region with a pixel value of 1 of a mask binary image stored for masking, inserting and compositing the insertion image behind an arbitrary region of the background image. An image synthesis method characterized by making it possible to. 2. An insertion image storage unit that stores an insertion image in the combination of two images, a background image storage unit that stores a background image on which the insertion image is combined, and pixels in arbitrary areas of the insertion image and the background image. a mask creation processing unit that creates a binary image with a value of 1 in an interactive format; an insertion mask image storage unit that stores a mask binary image for the insertion image created by the mask creation processing unit; and the mask creation unit. a prohibition mask image storage unit that stores a mask binary image for the background image created by the processing unit; and a region of pixel value 1 of the mask binary image on the insertion mask image storage unit, which is combined with the background image; , a compositing processing unit that does not perform compositing of the insertion image is provided in an area of pixel value 1 of the mask binary image on the prohibition mask image storage unit, and a compositing processing unit that prohibits compositing of the insertion image with respect to the background image; When the value mask has the prohibition mask image storage section and is synthesized by the synthesis processing section, the inserted image is not synthesized in the area of pixel value 1 of both images of the prohibition mask, so that any part of the background image can be An image synthesis processing device characterized in that it is possible to insert and synthesize the inserted image behind a region.