JPH1051630A - Image processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by analyzing image data sequentially for each specific unit thereby calculating the luminance, discriminating whether or not the luminance is a specific luminance and processing the data. SOLUTION: A CPU 1 reads an RGB value of a pixel whose address is designated by a value of an image position pointer 2-3 and calculates the luminance and compares the calculated luminance with a reference value in a setting value memory 2-4 so as to check a pixel having a high luminance more than the reference value. The value of the image position pointer 2-3 over the reference value is set to a work memory 2-5, stored in a luminance pattern memory 2-7, in which a pattern of a kind selected and designated is overwritten on the pixels. The similar operation is repeated for each pixel and the luminance pattern is synthesized for each dot of a high luminance set parts to easily obtain an image with reality thereby improving the workability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image processing apparatus for processing image data in a personal computer, a word processor, or the like.

[0002]

2. Description of the Related Art Conventionally, in an image processing apparatus, image data fetched from an image sensor or the like is manually processed to obtain an image suitable for a user's preference. In this case, by adding a cursor to the processed part of the image data and selecting a desired image pattern from various prepared image patterns, an image pattern is added or replaced, or The image is processed by a technique such as erasing or emphasizing the image.

[0003]

However, in the method of processing an image in this way, since all operations are premised on, for example, designating a processing target with a cursor, the workability is poor and there are many mistakes. SUMMARY OF THE INVENTION It is an object of the present invention to automatically process an image of a desired portion without manually specifying a processing target to be processed in the image data in advance.

[0004]

The means of the present invention are as follows. (1) The brightness calculating means sequentially analyzes the image data for each predetermined unit and calculates the brightness. (2) The determining means determines whether or not the luminance calculated by the luminance calculating means is a predetermined luminance. (3) The image processing means processes at least a part of the image data based on a predetermined image processing based on the image portion determined to have the predetermined luminance by the determination means. The image processing means may replace the image portion determined to have the predetermined luminance with a predetermined image pattern. Further, the image processing means may add a predetermined image pattern to the image portion determined to have the predetermined luminance. In this case, when adding the predetermined image pattern to the image portion determined to have the predetermined luminance, the image processing means may add a radiant pattern extending radially from the image portion. . Further, the image processing means may apply a gradation to the image pattern based on the color of the image portion when adding a predetermined image pattern to the image portion determined to have the predetermined luminance. Is also good. Further, the image processing means may change the color of the image portion determined to have the predetermined luminance. Now, when processing of the image data is instructed, the luminance calculating means sequentially analyzes the image data for each predetermined unit to calculate the luminance, and the determining means determines that the luminance calculated by the luminance calculating means is the predetermined luminance. Is determined. Here, when it is determined that the brightness is the predetermined brightness, the image processing means processes a part of the image data based on the image portion. Therefore, it is possible to automatically process an image of a desired portion without having to manually specify in advance which processing target in the image data is to be processed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of a word processor having a color image processing function. C
PU1 is a central processing unit that controls the overall operation of the word processor according to various programs stored in the program memory 2-1 in the RAM2. The portable storage medium 3 is constituted by a magnetic / optical storage medium such as a floppy disk, an optical disk, a RAM card or the like, which is detachably mountable, and a semiconductor memory, and stores programs and data. When the portable storage medium 3 is attached to the main body of the word processor, programs and data in the portable storage medium 3 are taken into the CPU 1 via the storage medium control unit 4 and stored in the storage device 5. The storage device 5 includes a ROM, a hard disk, an optical disk, and the like, and includes an operating system, various application programs, data files,
The CPU 1 stores character font data and the like. When a program or data is transmitted from another device via a communication line or the like, the CPU 1 captures the program or data and stores it in the storage device 5. The CPU 1 controls the input / output operations of the input unit 6, the image input device 7, the display unit 8, and the printing unit 9 which are the input / output peripheral devices. The input unit 6 has a key input device for inputting various data and commands, and a pointing device such as a mouse. Image input device 7
Is a digital camera or an image sensor, and an image input device 7
When the CPU 1 receives image data, the CPU 1 captures the image data and causes the display unit 8 to display and output the image data, or stores the image data in the image memory 2-2 in the RAM 2.

The RAM 2 includes an image memory 2-2, an image position pointer 2-3, a set value memory 2-4, a work memory 2-5, a size determination memory 2-6, a brightness pattern memory, in addition to the program memory 2-1. 2-7.
The image memory 2-2 is an image memory for storing RGB color image data externally supplied from the image input device 7, the portable storage medium 3, or the like. Image position pointer 2-
Numeral 3 designates the image data in the image memory 2-2 sequentially for each pixel, and the CPU 1 accesses the pixel at the position indicated by the value of the image position pointer 2-3 to access its R.
The luminance is obtained from the GB value, and it is determined whether the luminance is equal to or larger than the reference value. The set value memory 2-4 is a memory for storing a reference value in this case. If the luminance is equal to or higher than the reference value, the CPU 1 stores the value of the image position pointer 2-3 at that time in the work memory 2--4.
Set to 5. The work memory 2-5 holds and stores the value of the image position pointer 2-3 as a coordinate value designating the position of a pixel. Based on the coordinate sequence data of each pixel having a luminance equal to or higher than the reference value, the CPU 1 A cluster portion, that is, a high-luminance set portion in which pixels having a luminance equal to or higher than the reference value are detected, and the size of the high-luminance set portion is detected. Here, the size determination memory 2-6 stores data for determining whether or not the high-intensity aggregation portion is within a certain range, and stores a minimum size and a maximum size indicating the range.

The shine pattern memory 2-7 is an image memory for storing a shine pattern having a shape as shown in FIG.
The shine pattern has four cross patterns and six cross patterns. When one of the shine patterns is selectively designated from the input unit 6, the CPU 1 reads the designated shine pattern. Here, the shine pattern is a plurality of (four or six) straight lines (broken lines) extending radially from the center point.
And a white color is added. By arranging and combining a large number of such shine patterns in the high-brightness aggregation portion in the image data, the shine of the light-emitting object is represented in a pseudo manner. When the work position pointer 2-8 determines that the high-brightness set portion is within a certain size range, the work memory 2-5 corresponding to the high-brightness set portion
The CPU 1 sequentially designates the pixels at each position indicated by the value of the work position pointer 2-8, and adjusts the center of the shining pattern to each pixel to add the shining pattern to the image data. Are synthesized. The pattern development memory 2-9 will be described later.

Next, the image processing will be described with reference to the flowchart shown in FIG. A program for realizing each function described in the flowchart of FIG. 3 is stored in the portable storage medium 3 or the storage device 5 in the form of a program code readable by the CPU 1,
The contents are loaded into the program memory 2-1 in the RAM 2. FIG. 3 is a flowchart showing the image processing which is started when the input unit 6 gives an instruction to synthesize the content of the shining pattern memory 2-7 with the image data in the image memory 2-2. . Now, it is assumed that one color image (for example, a night scene) captured by a digital camera as the image input device 7 is stored in the image memory 2-2 as a processing target.

First, of the two types of shine patterns stored in the shine pattern memory 2-7, a pattern suitable for the user's preference is selectively designated (step A).
1). Here, the CPU 1 sets an initial value in the image position pointer 2-3 and performs an initialization process for designating a head pixel in the image memory 2-2 (step A2). Then, it is checked whether or not all the pixels in the image position pointer 2-3 have been specified (step A3). Since the head pixel has been specified, the process proceeds to step A4, and the value of the image position pointer 2-3 is determined. RG of the pixel addressed by
The B value is read and its luminance is calculated. Here, in general, a color image is composed of 8 bits for each color of RGB, and 256 bits.
It has the brightness of gradation and the combination of 16 colors is expressed, but the brightness differs depending on the RGB value, red is three times brighter than blue, and green is nearly twice as bright as red. Therefore, the luminance is calculated according to the following equation. "Brightness = 1 / 8B + 3 / 8R + 1 / 2G" When the brightness is calculated in this way, the CPU 1 compares this brightness with the reference value in the set value memory 2-4, and determines that the brightness is higher than the reference value. It is checked whether or not the pixel is a defective pixel (step A5). Here, on condition that it is equal to or more than the reference value, CP
U1 sets the value of the image position pointer 2-3 as the image position in the work memory 2-5 (step A).
6). Then, "1" is added to the content of the image position pointer 2-3.
Is added to update the value (step A7), and the above-described luminance calculation process is repeated (step A4) until all the pixels have been designated (step A3). On that condition, the image position is sequentially
The data is stored in the work memory 2-5 (step A6).

When the processing for all pixels is completed in this way,
The CPU 1 accesses the contents of the work memory 2-5 from the beginning, and checks whether or not there is a high-luminance set portion (lump portion) (step A8). In this case, the work memory 2-5 stores the position coordinates of the high luminance pixel,
Based on the value of the position coordinates, it is checked whether or not the pixel is continuous in the horizontal direction and the vertical direction, thereby checking whether or not there is a high-luminance set portion. Here, if there is no high-luminance set portion, the image processing is terminated at this point and the process exits from this flow. If there is a high-luminance set portion, the process proceeds to step A10, and the size is reduced. The contents of the judgment memory 2-6 are read to judge the size of the high-luminance set portion. In other words, the minimum size and the maximum size indicating the range are stored in the size determination memory 2-6, and it is checked whether or not the high-luminance set is within this range. Here, if the high-brightness set is too small or too large, the high-brightness set is invalidated and the process returns to step A8 to search for the next high-brightness set.

When a high-luminance set portion having a predetermined size is retrieved (step A10), the CPU 1 stores the position coordinates of the top of the high-luminance set portion in the work memory 2-5.
And sets it in the work position pointer 2-8 (step A11), and reads out the shine pattern of the type selected and designated in step A1 from the pattern memory 2-7 (step A12). Then, the value of the work position pointer 2-8 is used for the image memory 2-2.
Is accessed, and the pixel at the position indicated by the value is designated (step A13). At the designated pixel position, the center of the glitter pattern read out in step A12 is arranged to overwrite the glitter pattern on the image data. (Step A14). FIG. 4 shows the state in this case. In the figure, the circled portion is a high-luminance set portion, and illustrates a case where four cross patterns are combined and arranged as a shine pattern. Here, FIG. 4A shows a case where the value of the work position pointer 2-8 is the center point of the high-luminance set portion.
(B) shows a state in which the shining patterns are combined and arranged in the case of the upper end and (C) in the case of the upper end thereof.

When the shine pattern is overwritten and synthesized as described above, the value of the work position pointer 2-8 is updated to "1" (step A15), and whether the value has exceeded the high-luminance set portion, that is, It is checked whether or not the luminous patterns have been combined and arranged for all the dots constituting the high-luminance set portion (step A16). Now, since it is the case where the shining pattern is arranged in the first pixel, the process returns to step A12,
Hereinafter, the same operation is repeated for each pixel, and a shining pattern is synthesized for each dot constituting the high-brightness aggregation portion (see FIGS. 4D and 4E). As a result, the high-brightness gathering portion is filled with the brilliant pattern, and the high-brightness gathering portion is replaced with the brilliant pattern. In this case, as shown in FIG. 4E, the width of each line constituting the four crosses corresponds to the size of the high-brightness aggregation portion, and the shape of the high-brightness aggregation portion is reproduced as it is at the tip. It will be. When the process for one high-luminance set portion is completed in this way, the process proceeds to step A8, where the next high-luminance set portion is searched, and thereafter, the same operation is repeated.

FIGS. 5 and 6 specifically show images after the luminescent patterns are combined and arranged. That is, even if it is not possible to satisfactorily photograph the illuminance of the light source portion in the photographed image of the night view, a realistic image as shown in FIG. Can be converted to In this case, since a bright pattern is not synthesized with a light source that is extremely small, a more realistic image can be obtained and the image can be prevented from being complicated. Here, FIG. 5 shows an example in which the shining patterns of four crosses are combined in an X-shape, and FIG. 6 shows an example of an image of the dusk sun, in which the shining patterns of six crosses are combined. It is possible to obtain an image having a certain quality.

(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described with reference to FIG. Note that the first
In the embodiment, when a bright pattern is combined with a high-brightness aggregate portion in an image, the inside of the high-brightness aggregate portion is embedded with the bright pattern, but in the second embodiment, the inside of the high-brightness aggregate portion is embedded. Except, by combining the shine pattern on the outside, the color of the high-brightness set portion is left as it is, and in the shine pattern extending radially from the outside of the high-brightness set portion, the color is based on the color of the high-brightness set portion A gradation is added so as to change gradually. That is, Step B1 executes the same processing as Steps A1 to A7 in FIG. 3 described above. The luminance is obtained for all the pixels of the color image to be processed, and the position coordinates of the pixels having the luminance equal to or more than the reference value are calculated. The data is stored in the work memory 2-5. When such processing is completed, the process proceeds to steps B2 to B4, and executes the same processing as in steps A8 to A10 in FIG.
By analyzing the contents of -5, a high-luminance set portion having a predetermined size and a large size is searched. As a result, if there is a high-luminance set portion having a predetermined size, the head position coordinate is set in the work position pointer 2-8 (step A).
5) The contour (outermost line) corresponding to the high-luminance set portion is extracted by analyzing the contents of the work memory 2-5 (step B6).

In this state, the shine pattern of the type selected and designated is read out from the pattern memory 2-7 (step B7), and the shine pattern is set at the position corresponding to the designated pixel indicated by the value of the work position pointer 2-8. Are arranged in the pattern development memory 2-9 (step B8). Pattern development memory 2
Reference numeral -9 denotes an image memory used to develop a luminous pattern. Then, the value of the work position pointer 2-8 is updated (step B9), and it is checked whether all the pixels in the high-luminance set portion have been specified (step B1).
0) Since the first pixel of the high-luminance set portion has now been designated, the process returns to step B7, and the above-described operation is repeated for each pixel to sequentially develop the shine pattern in the pattern development memory 2-9. Go on.

When the processing for all the pixels of the high-brightness set is completed, a shine pattern processing for removing a portion corresponding to the inside of the outline of the high-brightness set from each shine pattern in the pattern development memory 2-9. Perform (Step B
12). In this case, since the outline of the high-luminance set portion has been extracted in step B6, the contents of the pattern development memory 2-9 corresponding to the outline are erased based on this outline. Each shine pattern processed in this manner is overwritten on the corresponding position of the image data, and a gradation is added to each shine pattern (step B).
13). That is, in the pattern development memory 2-9, each radiance pattern in which a portion corresponding to the inside of the outline of the high-luminance set portion has been deleted is stored, and the center of the deleted portion is set to the center of the high-luminance set portion in the image data. The content of the pattern development memory 2-9 is overwritten on the image memory 2-2 so as to match the color, and the color of each synthesized shine pattern is subjected to gradation based on the color of the high luminance set portion.
At that time, the closer to the high-brightness set part, the closer to the color of the high-brightness set part, and the further away from the high-brightness set part,
The color of the shine pattern is gradually changed so as to be a color close to the shine pattern's own color. When the process for one high-brightness set is completed in this way, the process returns to step B2, and when the next high-brightness set is retrieved, the same image processing is repeated thereafter. As described above, according to the second embodiment, it is possible to synthesize a shining pattern outside the high-luminance set portion except for the inside thereof, so that the color of the high-luminance set portion can be left as it is, and Since the color of the shining pattern gradually changes on the basis of the color of the high-luminance set portion, more realistic image processing is possible.

In each of the above-described embodiments, the shining pattern is combined with the image data. However, the present invention is not limited to this, and the image processing may be performed by image processing as shown in FIGS. 8A and 8B. Even if there is, it is applicable. That is, FIG.
In (A), a high-luminance set portion (sun) is detected from an image before processing, and the high-intensity set portion is replaced with another image (crescent moon), and the brightness of all other images is reduced entirely. It was processed as follows. In this case, replacing the high-luminance set portion with another image is basically the same as in the first embodiment, but the size of the replaced image is arbitrary without being affected by the image before processing. Further, the luminance of the entire image may be controlled in accordance with the replacement of the image. In FIG. 8B, a high-luminance set portion (red container) is detected from the image before processing, and processing is performed so that the color of this container is changed to blue. in this case,
Also in the first embodiment, since the color of the high-brightness aggregate portion (light source) is changed to the color of the shining pattern, it is basically the same as that of the first embodiment. Is not changed, only the color is changed.

In each of the above-described embodiments, a high-luminance set portion having a luminance equal to or higher than the reference value is detected as the processing target from the image data. You may make it detect. Furthermore, when adding a shining pattern, "fluctuation", "blur", etc. may be added, and the shape and type of the shining pattern are not limited and are arbitrary.

[0019]

According to the present invention, it is possible to automatically process an image of a desired portion without having to manually specify in advance what to process in the image data. Therefore, workability can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a word processor having a color image processing function.

FIG. 2 is a diagram showing the contents of a shine pattern memory 2-7.

FIG. 3 is a flowchart illustrating image processing.

FIG. 4 is a diagram for specifically explaining image processing.

FIG. 5 is a diagram showing an example of a processed image obtained by processing an image using a bright pattern of four cloths.

FIG. 6 is a diagram showing an example of an image after processing by image processing using a shining pattern of six cloths.

FIG. 7 is a flowchart illustrating image processing according to the second embodiment.

FIG. 8 is a diagram showing a modified application example of the present invention;
(A) is a diagram illustrating an example of image replacement, and (B) is a diagram illustrating a color change.

[Explanation of symbols]

 1 CPU 2 RAM 2-1 Program memory 2-2 Image memory 2-3 Image position pointer 2-4 Setting value memory 2-5 Work memory 2-6 Size judgment memory 2-7 Brightness pattern memory 2-8 Work position pointer 2 -9 pattern development memory 3 portable storage medium 4 storage medium control unit 5 storage device 6 input unit 7 image input device 8 display unit

Claims (6)

[Claims] 1. A luminance calculating means for sequentially analyzing image data for each predetermined unit to calculate the luminance, a determining means for determining whether or not the luminance calculated by the luminance calculating means is a predetermined luminance; Image processing means for processing at least a part of the image data based on a predetermined image processing based on the image portion determined to have a predetermined luminance by the determination means. Image processing apparatus. 2. The image processing apparatus according to claim 1, wherein said image processing means replaces the image portion determined to have a predetermined luminance with a predetermined image pattern. 3. An image processing apparatus according to claim 1, wherein said image processing means adds a predetermined image pattern to the image portion determined to have a predetermined luminance. 4. The image processing means, when adding a predetermined image pattern to the image portion determined to have the predetermined luminance, adds a radiant pattern extending radially from the image portion. The image processing apparatus according to claim 3, wherein: 5. The image processing means, when adding a predetermined image pattern to the image portion determined to have a predetermined luminance, applies gradation to the image pattern based on the color of the image portion. 4. The image processing apparatus according to claim 3, wherein: 6. An image processing apparatus according to claim 1, wherein said image processing means changes a color of the image portion determined to have a predetermined luminance.