JP6666298B2 - Video generation apparatus, video presentation system, method, and program - Google Patents

Description

  The present invention relates to a dynamic image whose appearance differs depending on the manner of observation.

  When high spatial frequency image information with an ambiguous motion direction is superimposed on low spatial frequency image information with a clear motion direction, the appearance of high spatial frequency motion is dragged by the appearance of low spatial frequency motion. Is known (for example, see Non-Patent Document 1 and the like). On the other hand, if there is a shift between the high spatial frequency phase component and the low spatial frequency phase component in the stopped image, the appearance of the low spatial frequency component is shifted to the appearance of the high spatial frequency component. It is known to be perceived (for example, see Non-Patent Document 2). Also, when the high spatial frequency component and the low spatial frequency component obtained from different images are superimposed, the high spatial frequency component looks strong when the observation distance is short, and the low spatial frequency component when the observation distance is long. Is known to be strong (for example, see Non-Patent Document 3).

Ramachandran, V.S. & Cavanagh, P., “Motion capture anisotropy,” Vision Research 27, 97-106 (1987). Morrone, M.C. & Burr, D.C., “Feature Detection in Human Vision: A Phase-Dependent Energy Model,” Proceedings of the Royal Society of London.Series B. Biological Sciences 235, 221-245 (1988). Oliva, A., Torralba, A. & Schyns, P.G., “Hybrid Images,” in ACM SIGGRAPH 2006 Papers 527-532 (ACM, 2006) .doi: 10.1145 / 1179352.1141919

  However, there is no known dynamic image whose appearance differs depending on the spatial frequency perceived by the observer. In order to obtain such an image, it is necessary to properly manipulate the spatial frequency information of the image motion, but no method of such manipulation is known.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a dynamic image whose appearance differs depending on a spatial frequency perceived by an observer.

  An image including a first region and a second region that are different from each other is generated. In the first region, a first dynamic video component belonging to the first spatial frequency band and a first static video component belonging to a spatial frequency band different from the first spatial frequency band are superimposed. In the second region, a second dynamic video component belonging to a second spatial frequency band different from the first spatial frequency band and a second static video component belonging to a spatial frequency band different from the second spatial frequency band Are superimposed.

  As a result, a dynamic image whose appearance differs depending on the spatial frequency perceived by the observer is obtained.

FIG. 1 is a block diagram illustrating a functional configuration of the video generation device according to the embodiment. FIG. 2 is a conceptual diagram for explaining the video generation method of the embodiment. FIG. 3 is a conceptual diagram for explaining the video generation method of the embodiment. FIG. 4A and FIG. 4B are conceptual diagrams for illustrating how a viewer observes an image. FIG. 5A and FIG. 5B are conceptual diagrams for illustrating a method of observing an image by an observer. FIG. 6 is a block diagram illustrating the configuration of the video presentation system according to the embodiment.

Hereinafter, embodiments of the present invention will be described.
[Overview]
First, an outline will be described. In the first to sixth embodiments and their modifications, a “video” including a “first region” and a “second region” different from each other is generated. The “first region” and the “second region” are spatial regions. "Video" in the first to fifth embodiments and their modifications is a moving image including dynamic information. The “image” may or may not include an area other than the “first area” and the “second area”. In the “first region”, the “first dynamic video component” belonging to the “first spatial frequency band” and the “first static video component” belonging to a spatial frequency band different from the “first spatial frequency band” Component "is superimposed. In the “second region”, a “second dynamic video component” belonging to a “second spatial frequency band” different from the “first spatial frequency band” and a spatial frequency band different from the “second spatial frequency band” are used. The “second static video component” to which it belongs is superimposed. An observer who sees this dynamic “image” receives different impressions of movement depending on the perceived spatial frequency. Generally, the closer the distance between the observer and the “image” is, the wider the range of the spatial frequency perceived by the observer is. That is, the maximum value of the absolute value of the spatial frequency perceived when the observer observes a nearby "video" is higher than the maximum value of the absolute value of the spatial frequency perceived when observing a distant "video". . Therefore, the observer of the “image” receives a different impression of the motion depending on the distance from the “image”. Also, the better the eyesight of the observer, the wider the range of spatial frequencies perceived by the observer. That is, the better the eyesight of the observer, the larger the maximum value of the absolute value of the spatial frequency perceived when the observer observes the “video”. Therefore, the impression of the movement that the observer receives from the “image” differs depending on the eyesight of the observer of the “image”. The ability to resolve (discriminate) fine image information even when the observation distance increases is referred to as “sight”, and the better (higher) the “sight”, the wider the space in the wider range when the observation distance is longer. You can perceive the frequency band. Furthermore, the greater the degree of diffusion of the light of the medium interposed between the “image” and the observer, the narrower the spatial frequency width perceived by the observer. That is, the greater the degree of diffusion of light in this medium, the smaller the maximum absolute value of the spatial frequency perceived by the observer. Therefore, the impression of the movement that the observer receives from the “image” differs according to the degree of diffusion of the light of the medium interposed between the “image” and the observer. The “medium” may be a solid such as frosted glass, a liquid, or a gas.

  The “first dynamic video component” and the “second dynamic video component” are video components having motion. That is, the “first dynamic video component” includes image components of a plurality of frames, and these image components are different from each other. Similarly, the “second dynamic video component” includes image components of a plurality of frames, and these image components are different from each other. Examples of the “first static video component” and the “second static video component” are stationary components having no motion. For example, the “first static video component” is composed of one frame image component, and the “second static video component” is composed of one frame image component. Alternatively, the “first static video component” and the “second static video component” may not be completely still. That is, the “first static video component” is a component having a smaller motion than the “first dynamic video component”, and the “second static video component” is the “second dynamic video component”. A component having a smaller motion than the “video component” may be used. For example, the average value of the movement amounts of the pixels of the “first static video component” may be smaller than the average value of the movement amounts of the pixels of the “first dynamic video component”. Similarly, the average value of the movement amounts of the pixels of the “second static video component” may be smaller than the average value of the movement amounts of the pixels of the “second dynamic video component”. The average value of the moving speeds of the pixels of the “first static video component” may be smaller than the average value of the moving speeds of the pixels of the “first dynamic video component”. Similarly, the average value of the moving speed of the pixel of the “second static video component” may be smaller than the average value of the moving speed of the pixel of the “second dynamic video component”.

  It is desirable that the movements of the “first dynamic video component” and the “second dynamic video component” are periodic vibrations (reciprocating motion). In the case of periodic vibration, the deviation between the static video component and the dynamic video component does not increase by a certain amount or more. In addition, differences in the spatial frequency perceived by the observer from the "image" (distance between the observer and the "image", visual acuity of the observer, degree of diffusion of light in the medium interposed between the "image" and the observer, etc. ), The difference in the impression of the movement that the observer receives from the “video” becomes remarkable.

It is desirable that the motion of the “first dynamic video component” and the motion of the “second dynamic video component” be the same or approximate. For example, in each frame, the moving speed of each pixel is the same or similar between the “first dynamic video component” and the “second dynamic video component”, and the moving directions are the same. It is desirable to have or approximate. In other words, in each frame, it is desirable that the movement vector of each pixel is the same or approximate between the “first dynamic video component” and the “second dynamic video component”. For example, the relative position of the pattern represented by the “second dynamic video component” with respect to the pattern represented by the “first dynamic video component” does not change, or the change amount of the relative position is equal to or less than a predetermined value. desirable. Note that the "moving speed of each pixel is approximated between alpha ₁ and beta ₁ ', the following ₁ difference γ between the moving speed of each pixel in the moving speed and the beta ₁ of each pixel in the alpha ₁ Means that The gamma ₁ is a positive value, examples of gamma ₁ are _{γ 1 = 0.5α 1, γ 1} = 0.3α 1, γ 1 = 0.1α 1, and the like γ ₁ = 0.05α _1. The "direction of movement of each pixel is approximated between alpha ₂ and beta _2", the size of the internal angle formed by the direction of movement of each pixel in the moving direction and beta ₂ of each pixel in the alpha ₂ is γ ₂ or less. The gamma ₂ is a positive angle, examples of gamma ₂ is _{γ 2 = 10 °, γ 2} = 3 °, γ 2 = 1 °, and the like γ ₂ = 0.5 °. The "movement vector of each pixel is approximated between alpha ₃ and beta _3", it is a gamma ₃ or less the distance between the motion vector of each pixel in the motion vector and beta ₃ of each pixel in the alpha ₃ Means that. γ ₃ is a positive value, and examples of γ ₃ are 50%, 30%, 10%, 5%, etc. of the size of α ₃ .

  Similarly, when the “first static video component” and the “second static video component” are not completely still, it is desirable that their movements be the same or approximate to each other. That is, (1) the motion of the “first dynamic video component” and the motion of the “second dynamic video component” are the same or approximate, and (2-1) the “ The “first static video component” and the “second static video component” are still components, or (2-2) the “first static video component” is the “first video component”. The second static video component is a component having a smaller motion than the “second dynamic video component”, and the “first static video component” is a component having a smaller motion than the “first static video component”. It is desirable that the way of movement of the “natural video component” and the way of movement of the “second static video component” be the same or approximate. Thereby, the difference in the impression of the movement that the observer receives from the “video” according to the difference in the spatial frequency that the observer perceives from the “video” becomes remarkable.

  The “first spatial frequency band” is a “high spatial frequency band”, the “spatial frequency band different from the first spatial frequency band” is a “low spatial frequency band” different from the “high spatial frequency band”, and the “second spatial frequency band” is a “second spatial frequency band”. The “spatial frequency band” may be a “low spatial frequency band”, and the “spatial frequency band different from the second spatial frequency band” may be a “high spatial frequency band”. That is, the “first dynamic video component” of which “video” belongs to the “high spatial frequency band” and the “first static video component” of the “low spatial frequency band” are superimposed. The “first region”, the “second dynamic video component” belonging to the “low spatial frequency band”, and the “second static video component” belonging to the “high spatial frequency band” are superimposed. May be included. Here, when the observer can widely perceive the low spatial frequency to the high spatial frequency of the “image” (for example, when the distance between the observer and the “image” is short, when the observer has good vision, ) And the observer have a low degree of diffusion of light of the medium interposed between the observer and the observer, the observer moves the “second dynamic video component” belonging to the “low spatial frequency band” of the “second region”. And the movement of the “first dynamic video component” belonging to the “high spatial frequency band” of the “first region” can be sufficiently recognized. As a result, the “second static video component” belonging to the “high spatial frequency band” of the “second region” appears to be raised, and the “second region” is stationary or almost stationary. appear. In particular, when the way of movement of the “first dynamic video component” and the way of movement of the “second dynamic video component” are the same or approximate, the “second dynamic video component” The motion and the motion of the “first dynamic video component” appear to be an integrated motion, and this effect becomes more remarkable. On the other hand, when the observer cannot sufficiently perceive the high spatial frequency of the “image” (for example, when the distance between the observer and the “image” is long, when the observer has poor eyesight, “image” and the observer (In the case where the degree of diffusion of the light of the medium interposed therebetween is large), the observer can sufficiently recognize the movement of the “second dynamic video component” belonging to the “low spatial frequency band” of the “second region”. However, the movement of the “first dynamic video component” belonging to the “high spatial frequency band” of the “first region” cannot be sufficiently recognized. As a result, only the “low spatial frequency band” of the “second region” appears to move, and the “second region” appears to move. As described above, the “second region” looks stationary (or almost still) or appears to move according to the width of the spatial frequency perceived by the observer from the “video”. Such an effect is remarkable when the “first region” and the “second region” are adjacent to each other. Therefore, it is desirable that the “first region” and the “second region” are adjacent to each other. For the same reason, it is desirable that at least a part of the “second region” is surrounded by the “first region”, and that all of the “second region” is surrounded by the “first region”. desirable.

  The “high spatial frequency band” includes, for example, a spatial frequency whose absolute value is equal to or more than a “threshold (cutoff frequency)” or exceeds a “threshold”. The “low spatial frequency band” includes, for example, a spatial frequency whose absolute value is less than the “threshold” or less than near the “threshold”, or whose absolute value is equal to or less than the “threshold” or less than the vicinity of the “threshold”.

  In this case, information representing the “range of distance” from the “video” to the viewer may be input, and a “threshold” corresponding to the “range of distance” may be set. For example, the “threshold” may be decreased when the “range of distance” is wide, and the “threshold” may be increased when the “range of distance” is narrow. For example, the “threshold” may be decreased when the maximum value of the distance from the “video” to the observer is large, and the “threshold” may be increased when the maximum value of the distance is small. For example, the “threshold” may be decreased as the maximum value of the distance from the “video” to the observer increases, and the “threshold” may be increased as the maximum value of the distance decreases. That is, when the maximum value of the distance from the “image” to the observer is the “first value”, the “threshold” is set when the maximum value of the distance from the “image” to the observer is the “second value” It is preferable that the “first value” is larger than the “threshold value” and the “first value” is smaller than the “second value”. Accordingly, when the degree of freedom of the distance from the “video” to the observer is large (when the maximum value of the distance is large), the “second dynamic video component” in the “second region” The ratio of "static video components" can be increased. As a result, when the "image" is observed nearby, the impression that the "second region" is stationary can be clearly given, and the distance from the "image" to the observer is sufficient. At times, it is possible to give an impression that the “second region” is moving. Conversely, when the degree of freedom of the distance from the “image” to the observer is small (when the maximum value of the distance is small), the “second region” is not changed largely without changing the distance from the “image” to the observer. Can give the impression that it is stationary or the impression that it is moving.

  For the same reason, information representing the “degree of light diffusion” of the medium interposed between the “image” and the observer may be input and a “threshold” corresponding to the degree of diffusion may be set. For example, the “threshold” may be decreased when the “light diffusion degree” of the medium is large, and the “threshold” may be increased when the “light diffusion degree” is small. For example, the “threshold” may be decreased as the “light diffusion degree” is increased, and the “threshold” may be increased as the “light diffusion degree” is decreased. That is, the threshold when the index indicating the “degree of light diffusion” is the “first value” is smaller than the threshold when the index indicating the “degree of light diffusion” is the “second value”, and the index is The “light diffusion degree” when the “first value” is set may be larger than the “light diffusion degree” when the index is the “second value”.

  When an observer with poor eyesight observes an “image”, there is a case where a component in a high spatial frequency band included in the “image” cannot be perceived even if the observer is short from the “image”. Therefore, an index indicating the visual acuity of the observer may be input and a “threshold” corresponding to the visual acuity may be set. For example, the “threshold” may be decreased when the observer has poor eyesight, and the “threshold” may be increased when the eyesight is good. That is, the threshold when the index representing visual acuity is “first value” is smaller than the threshold when the index representing visual acuity is “second value”, and the visual acuity when the index is “first value”. May be worse than the visual acuity when the index is the “second value”.

  The “video generation device” that generates the “video” is, for example, the “first video” in which the “first dynamic video component” and the “first static video component” are superimposed in the “first region”. A second video component ”obtained by superimposing a“ second dynamic video component ”and a“ second static video component ”in a“ second region ”, and at least a“ first video component ”. The “image” is obtained by superimposing the “component” and the “second image component”. The “video” is presented to the observer by the “video presenting device”. The “video presenting device” may display “video” on a display or project “video” on a screen or the like. A “video” data structure for the “video presenting device” to present the “video” may be provided.

  The “video” in the sixth embodiment and its modified example may be a moving image including the above-described dynamic information, or may be a still image including no dynamic information. The video presentation system that presents this “video” has a “video presentation device” and a “diffusion member”. The “video presenting device” includes a “first video component” belonging to a “first spatial frequency band” and a “second video component” belonging to a “second spatial frequency band” different from the “first spatial frequency band”. , Are presented. The “diffusion member” is a medium that can be interposed between the “image” and the observer, and has a property of diffusing light. An example of the “first spatial frequency band” is the aforementioned “high spatial frequency band”, and an example of the “second spatial frequency band” is the aforementioned “low spatial frequency band”. A "diffusion member" can be interposed between the "image" and the observer, and the observer can see the "image" through the "diffusion member", or the "diffusion member" between the "image" and the observer The observer can also directly see the "image" without intervening. The appearance that the observer perceives when the observer looks at the “image” through the “diffusion member” is different from the appearance that the observer perceives when the observer directly looks at the “image”. That is, an observer who observes the “video” without passing through the “diffusion member” perceives both the “first video component” and the “second video component” included in the “video”. On the other hand, an observer who observes the “image” through the “diffusion member” perceives a component having a lower spatial frequency out of these components more dominantly than the other component.

[First Embodiment]
In the present embodiment, an image M including first to N-th areas different from each other is exemplified. Here, N is a positive integer of 2 or more.

<Structure>
As illustrated in FIG. 1, the video generation device 1 according to the present embodiment includes a band separation unit 11, dynamic component generation units 12-1 to 12-N, weighted map storage units 13-1 to 3-N, and a superposition unit 14. -1 to 14-N, and an integration unit 15.

<Pre-processing>
In this embodiment, another different regions R ₁ in the spatial _domain, ..., and generates an image M containing R _N. As a pretreatment, each region _{R i} (however, i = 1, ..., N ) weighting map MAP _i corresponding to is stored in the weighting map storage unit 13-i. Weighting map MAP _i is a two-dimensional array of pixel values as elements. Weighting map MAP _i takes advantage to move the image component of any spatial frequency bands in any region R _i, is a two-dimensional array representing the region R _i (image). Examples of the weighting map MAP _i is the pixel values of the pixels belonging to the region R _i is 1, the pixel values of the pixels that do not belong to the region R _i is a two-dimensional array of binary was zero. Alternatively, a two-dimensional array obtained by applying a Gaussian filter to the two-dimensional array of such binary or as a weighting map MAP _i. Other, larger than the pixel value of the pixel in which the pixel values of the pixels belonging to the region R _i does not belong to the region R _i, also a two-dimensional array range is normalized to 0 to 1 inclusive pixel value as a weighting map MAP _i Good. Note that the regions R ₁ ,..., _RN are different from each other. Desirably, the region _R 1, ..., none of _{R N} non-overlapping. However, the region R _1, ..., there may be a region where at least a part of R _N are overlapped with each other. The region R _1, ..., at least one of R _N is preferably adjacent to each other. Furthermore, the region _R 1, ..., at least one of _{R N} is, regions _R 1, ..., it is desirable that is surrounded by any other _{R N.} For example, in the example of FIG. 2, a region R ₁ (a background region outside the two star regions) corresponding to the weight map MAP ₁ is a region R ₂ , R ₃ (two star regions) corresponding to the weight maps MAP ₂ and MAP _3. ), And the regions R ₂ and R ₃ are surrounded by the region R ₁ .

<Process>
Hereinafter, the processing of this embodiment will be described.
≫Input of input image P≫
The input image P is input to the video generation device 1. The input image P may be a color image, a grayscale image, or a black and white image. The input image P of a color image is a set composed of a two-dimensional array of each of the three RGB channels. These two-dimensional array are for the respective pixel values of each channel element, each size is the same as the size of the weighting map MAP _i. Input image P grayscale or black and white images is for the each pixel value elements, the size is the same as the size of the weighting map MAP _i.

<< Process of Band Separation Unit 11 >>
Band separation unit 11 inputs the input image P, the input image P N number of spatial frequency bands _B 1, ..., separated into _{B N,} the spatial frequency band _{B i} (however, i = 1, ..., N ) _Is obtained and output. FIG. 2 shows an example where N = 3. The image components P ₁ ,..., _PN are still image components in the spatial domain, and the size of the image component P _i is the same as the size of the weight map MAP _i . Spatial frequency band _B 1, ..., the absolute value of _{B N} are different from each other. Spatial frequency band _B 1, ..., respectively _b 1 a center spatial frequency of the absolute value of _{B N,} ..., When _{b N,} satisfy the relationship of _{b 1 <b 2 <... <} b N. Spatial frequency band B _1, ..., but B _N is preferably free of spatial frequencies overlap each other, the spatial frequency band B _1, ..., at least some of B _N may contain spatial frequencies overlap each other. The bandwidths of the spatial frequency bands B ₁ ,..., B _N may or may not be the same. An example of the bandwidth of each spatial frequency band B _i (where i = 1,..., N) is a bandwidth of about two octaves. That is, up to a spatial frequency 4 × LB _i of four times the bandwidth of the _{B i} from the lowest spatial frequency LB _i for each spatial frequency band _{B i.} For example, the case of N = 3, the band separation unit 11 is the following low spatial frequency band 2cpi (cycles per image) and _{B 1,} and the spatial frequency band and _{B 2} in the 2～8Cpi, high spatial frequency 8~32cpi the band and the _{B 3.} The image component P _j (where j = 1,..., N and j ≠ i) is sent to the superimposing unit 14-i (where i = 1,..., N) as a static video component PS _j . Further, the image component P _i (where i = 1,..., N) is sent to the dynamic component generation unit 12-i.

<< Process of Dynamic Component Generation Unit 12-i >>
Each of the dynamic component generation units 12-i (where i = 1,..., N) gives a motion to the input image component P _i , whereby K (where K is an integer of 2 or more) K components are provided. A dynamic video component PD _i = {PD _{i, 1} ,..., PD _{i, K} } including a frame image PD _{i, k} (where k = 1,..., K) is obtained and output. Note that the image PD _{i, k} is the image of the k-th frame of the dynamic video component PD _i . Images PD _{i, k} are images in the spatial domain. A dynamic video component PD _i obtained by arranging images PD _{i, k} of a plurality of frames k = 1,..., K in time order (order from k = 1 to K) represents motion (that is, PD _i). Is a video). At least some of the images PD _{i, k} of the plurality of frames k = 1,..., K in each spatial frequency band B _i are different from each other. Motion imparted to the image component P _i by the dynamic component generating unit 12-i is preferably a cyclic vibration. However, other movements may be provided to the image component P _i. It is also desirable to provide a motion, each identical or close to each other of the dynamic component generation unit 12-1~N to the image component P _i. That is, it is desirable that the way of movement of the dynamic image component PD _{i and} the way of movement of the dynamic image component PD _j are the same or approximate (however, i, j∈ ｛1,..., N｝ and i ≠ j). However, at least a part of the dynamic component generation units 12-1 to 12-N may give a different motion from the others. If the amount of pixel movement given to the image component P _i is too large, the difference in impression received by the observer based on the difference in spatial frequency perceived from the “image” (for example, the difference in the distance between the observer and the image M) is reduced. May be smaller. Therefore, when the distance (observation distance) between the observer and the image M is changed, if the appearance does not change, it is necessary to devise a method of reducing the moving amount.

ただし、入力画像Ｐがグレースケール画像または白黒画像の場合、式（１）における乗算および加算は画素ごとに行われる。入力画像Ｐがカラー画像の場合、式（１）における乗算および加算はＲＧＢの３チャネルそれぞれの画素ごとに行われる。このように得られる画像Ｍ_ｉ，ｋを１番目のフレームからＫ番目のフレームまで時間順にならべて得られる映像成分Ｍ_ｉ（第ｉ映像成分）は、領域Ｒ_ｉ（第ｉ領域）で動的な映像成分ＰＤ_ｉ（第ｉの動的な映像成分）と静的な映像成分ＰＳ_ｊ（第ｉの静的な映像成分）とを重畳（加算）した成分に相当する。なお、図２の重み付け地図ＭＡＰ_ｉは、領域Ｒ_ｉの画素値を１とし、それ以外の画素値を０としたものである。画素値１の領域が白で表現され、画素値０の領域が黒で表現されている。図２の映像成分Ｍ_１は、２つの星形領域外の背景領域で、空間周波数帯域（低空間周波数帯域）Ｂ_１の動的な映像成分ＰＤ_１と、空間周波数帯域（中空間周波数帯域）Ｂ_２の静的な映像成分ＰＳ_２と、空間周波数帯域（高空間周波数帯域）Ｂ_３の静的な映像成分ＰＳ_３とを重畳したものである。映像成分Ｍ_１では、空間周波数帯域Ｂ_１の背景領域の成分のみが動きを持つ。図２の映像成分Ｍ_２は、左側の星形領域で、空間周波数帯域Ｂ_２の動的な映像成分ＰＤ_２と、空間周波数帯域Ｂ_１の静的な映像成分ＰＳ_１と、空間周波数帯域Ｂ_３の静的な映像成分ＰＳ_３とを重畳したものである。映像成分Ｍ_２では、空間周波数帯域Ｂ_２の左側の星形領域の成分のみが動きを持つ。図２の映像成分Ｍ_３は、右側の星形領域で、空間周波数帯域Ｂ_３の動的な映像成分ＰＤ_３と、空間周波数帯域Ｂ_１の静的な映像成分ＰＳ_１と、空間周波数帯域Ｂ_２の静的な映像成分ＰＳ_２とを重畳したものである。映像成分Ｍ_３では、空間周波数帯域Ｂ_３の右側の星形領域の成分のみが動きを持つ。 << Processing of Superposition Unit 14-i >>
Each of the superimposing units 14-i (where i = 1,..., N) includes a dynamic video component PD _i = {PD _{i, 1} ,..., PD _{i, K} } and a static video component PS _j ( However, j = 1, ..., a N and j ≠ i) input, and outputs obtained video component M _i weighted map mAP _i read from the weighting map storage unit 13-i superimposed after multiplying these . That is, the superimposing unit 14-i multiplies the image obtained by multiplying the image PD _{i, k} by the weighted map MAP _i and the static video component PS _j for i = 1,..., N and j ≠ i by the map MAP _i . Then, the image M _{i, k on} which the image component is superimposed is output as the image of the k-th frame of the video component M _i . The image M _{i, k} is a two-dimensional array having the same size as the weight map MAP _i .

However, when the input image P is a grayscale image or a black and white image, the multiplication and addition in Expression (1) are performed for each pixel. When the input image P is a color image, the multiplication and addition in Expression (1) are performed for each pixel of each of the three RGB channels. A video component M _i (i-th video component) obtained by arranging the images M _{i, k} obtained in this manner in chronological order from the first frame to the K-th frame is dynamic in a region R _i (i-th region). The video component PD _i (the i-th dynamic video component) and the static video component PS _j (the i-th static video component) are superimposed (added). In the weight map MAP _i of FIG. 2, the pixel value of the region R _i is 1 and the other pixel values are 0. The area of the pixel value 1 is represented by white, and the area of the pixel value 0 is represented by black. Video component M ₁ in FIG. 2, two star-shaped region outside the background region, the spatial frequency band and dynamic video components PD ₁ (low spatial frequency band) B _1, spatial frequency band (middle spatial frequency band) a static image components PS ₂ of the B _2, is obtained by superimposing the static image components PS ₃ spatial frequency band (high spatial frequency band) B _3. In the video component M _1, only the component of the background region of the spatial frequency band B ₁ is with motion. Video component M ₂ in FIG. 2, the left side of the star-type region, a dynamic image components PD ₂ of the spatial frequency band B _2, a static video component PS ₁ spatial frequency band B _1, the spatial frequency band B ₃ superimposed on _three static video components PS3. In the video component M _2, only the component of the star-shaped area on the left of the spatial frequency band B ₂ has a motion. Image components M ₃ in FIG. 2, the right star region, a dynamic image components PD ₃ spatial frequency band B _3, a static video component PS ₁ spatial frequency band B _1, the spatial frequency band B ₂ of a static image components PS ₂ is obtained by superimposing. The video component M _3, only the component of the right star-type region of the spatial frequency band B ₃ has the motion.

<< Processing of integration unit 15 >>
Integrated unit 15 includes a video component _M 1, ..., as input _{M N,} video component _M 1, ..., superimposing the _{M N} (addition) and outputs obtained video M by.
M = M ₁ +... + M _N (2)
However, when the input image P is a grayscale image or a black-and-white image, the addition in Expression (2) is performed for each pixel. When the input image P is a color image, the addition in Expression (2) is performed for each pixel of each of the three RGB channels. In the region R _i (i-th region) of the image M thus obtained, the dynamic image component PD _i (i-th dynamic image component) belonging to the spatial frequency band B _i (i-th spatial frequency band) And a static video component PS _j (i-th static video component) belonging to the spatial frequency band B _j (a spatial frequency band different from the i-th spatial frequency band). In the image M of FIG. 2, two star-shaped region outside the movement component of the spatial frequency band B ₁ in the background area, the component of the spatial frequency band B ₂ on the left side of the star region moves, the space in the right star region component of the frequency band _{B 3} moves.

≫Presentation of image M≫
The video M is input to the video presentation device 100, and the video presentation device 100 presents the video M. The video presentation device 100 may display the video M on a display or project the video M on a screen or the like. Note that the presentation time of the image of each frame constituting the video M is adjusted so that the video M can be recognized as a moving image instead of a series of still images. Within this range, the frame rate may be fixed or variable. An observer who observes the image M receives a different impression of movement from the image M according to the distance from the image M. In addition, the impression of the movement that the observer receives from the image M differs depending on the quality of the eyesight of the observer. Further, the observer receives an impression of a different motion from the image M according to the degree of diffusion of light of a medium interposed between the observer and the image M. As described above, the observer receives an impression of a different motion depending on the spatial frequency perceivable from the image M. Specifically, as the perceivable spatial frequency band in the image M decreases, a part of the image M appears to move, but as the perceptible spatial frequency band in the image M includes a high spatial frequency, the image M appears to move and a part of it appears to stop.

[Modification 1 of First Embodiment]
In the first embodiment, the image component P _j is used as it is as a static video component PS _j (where j = 1,..., N and j ≠ i). That is, the static video component _PSj is a still component. However, the static image components PS _j may have a motion. In this case, the video generation device 1 (FIG. 1) further includes a static component generation unit 17-i (where i = 1,..., N). In the first modification, the image component P _j (where j = 1,..., N and j ≠ i) is a static video component PS _j and the superimposing unit 14-i (where i = 1,..., N) instead sent is possible, the image component P _j is sent to the static component generating unit 17-j. Each of the static component generation units 17-j gives a motion to the input image component P _j , whereby the images PS K, (where K is an integer of 2 or more) of K frames ( _{where k} is an integer) = 1,..., K), and outputs the static video component PS _j = {PS _{j, 1} ,..., PS _{j, K} }. The images PS _{i, k} are images in the spatial domain. A static video component PS _j obtained by arranging images PS _{j, k} of a plurality of frames k = 1,..., K in time order (order from k = 1 to K) represents a motion (that is, a modified example). 1 PS _j is a moving image). At least some of the images PS _{j, k} of the plurality of frames k = 1,..., K in each spatial frequency band B _j are different from each other. However, the motion of the static video component PS _j in each spatial frequency band B _j is smaller than the motion of the dynamic video component PD _j . Motion imparted to the image component P _i by the static component generating unit 17-i is preferably a cyclic vibration. However, other movements may be provided to the image component P _i. In addition, it is desirable that each of the static component generation units 17-1 to 17-N gives the same or similar motion to the image component P _i . That is, it is desirable that the motion of the static video component PS _{i and} the motion of the static video component PS _j are the same or approximate (however, i, j∈ ｛1,..., N｝ and i ≠ j). However, at least a part of the static component generation units 17-1 to 17-N may give a different motion from the others. The output static video component PS _j (where j = 1,..., N and j ≠ i) is sent to the superimposing unit 14-i (where i = 1,..., N). Others are the same as the first embodiment.

[Second embodiment]
In the second embodiment, N = two spatial frequency bands spatial frequency as 2 _B 1, _{B 2} to separate two different regions _R 1, two different spatial frequency bands in _{R 2 B} 1 together, _{B 2} Generates an image M in which the component moves. In the following, differences from the already described items will be mainly described, and portions common to the already described items may be simplified by using the same reference numerals.

<Structure>
As illustrated in FIG. 1, the video generation device 2 according to the present embodiment includes a band separation unit 11, dynamic component generation units 12-1 and 12-2, weighted map storage units 13-1 and 13-2, and a superposition unit 14. -1, 14-2, and the integration unit 15.

<Pre-processing>
In this embodiment, an image M including _two different regions R ₁ and R ₂ in the spatial region is generated. As a pretreatment, each region _{R i} (however, i = 1, 2) weighting map MAP _i corresponding to is stored in the weighting map storage unit 13-i. In the example of FIG. 3, the weighting map MAP ₁ corresponding to the region R ₁ is a background region is stored in the weighting map storage unit 13-1, a weighting map MAP ₂ weighting map corresponding to the region R ₂ is a star-shaped region It is stored in the storage unit 13-2. Weighting map MAP _i illustrated in FIG. 3, the pixel values of the pixels belonging to the region R _i is 1, the pixel values of the pixels that do not belong to the region R _i is a two-dimensional array of binary which was 0, MAP ₁ obtained by inverting the (i.e., those pixel values are the pixel values of the pixels was 1 to 0, and the pixel value of the pixel a pixel value is 0 to 1) it is MAP _2.

<Process>
Hereinafter, the processing of this embodiment will be described.
≫Input of input image P≫
The input image P is input to the video generation device 2.

<< Process of Band Separation Unit 11 >>
The band separation unit 11 receives the input image P as input, separates the input image P into two spatial frequency bands B ₁ , B ₂ , and generates an image component P of each spatial frequency band B _i (where i = 1, 2). _i is obtained and output (FIG. 3). In this embodiment, the spatial frequency band B ₁ (first spatial frequency band) is a high spatial frequency band, and the spatial frequency band B ₂ (second spatial frequency band) is a low spatial frequency band different from the high spatial frequency band. Spatial frequency band B ₁ is a high spatial frequency band consists of spatial frequency which the absolute value exceeds the threshold TH (cutoff frequency) or higher or threshold TH. Spatial frequency band B ₂ is a low spatial frequency band is less than near the absolute value the threshold value TH or less than the threshold value TH, or an absolute value consists of the following spatial frequency near the threshold TH below or threshold TH. The band separation unit 11 applies, for example, a high-pass filter to the input image P to obtain an image component P ₁ of the spatial frequency band B ₁ , and applies a low-pass filter to the input image P to obtain an image component P of the spatial frequency band B _{2. 2} and output. The image component P _j (where j = 1, 2 and j ≠ i) is sent to the superimposing unit 14-i (where i = 1, 2) as a static video component PS _j . The image component P _i (where i = 1, 2) is sent to the dynamic component generation unit 12-i.

<< Process of Dynamic Component Generation Unit 12-i >>
Each of the dynamic component generation units 12-i (where i = 1, 2) gives a motion to the input image component P _i , whereby the K (where K is an integer of 2 or more) frames is input. A dynamic video component PD _i = {PD _{i, 1} ,..., PD _{i, K} } including an image PD _{i, k} (where k = 1,..., K) is obtained and output (FIG. 3). Dynamic motion video component PD _i as described above is preferably a cyclic vibration.

<< Processing of Superposition Unit 14-i >>
Each of the superimposing units 14-i (where i = 1, 2) includes a dynamic video component PD _i = {PD _{i, 1} ,..., PD _{i, K} } and a static video component PS _j (where, j = 1, 2 and a j ≠ i) input, and outputs obtained video component M _i weighted map mAP _i read from the weighting map storage unit 13-i is superimposed on after multiplication thereto. The video component M _i (the i-th video component) includes a dynamic video component PD _i (the i-th dynamic video component) and a static video component PS _j (the i-th video component) in the region R _i (the i-th region). (A static video component).

<< Processing of integration unit 15 >>
Integrated unit 15 includes a video component M, the _{M 2} as input, superimposes the video component _M 1, _{M 2} (addition) and outputs obtained video _{M =} M 1 + _{M 2} in. In the image M of FIG. 3, only the component of the spatial frequency band B ₁ (high spatial frequency band) moves in the background region (region R ₁ ) outside the star region, and the spatial frequency band B in the star region (region R ₂ ). Only the ₂ (low spatial frequency band) component moves.

≫Presentation of image M≫
The video M is input to the video presentation device 100, and the video presentation device 100 presents the video M.
As illustrated in FIG. 4A, when the observer 101 observes from a distance the image M short distance D _1, the movement of the low spatial frequency components (spatial frequency band B ₂₎ of the star-shaped region (region R ₂₎ Then, the motion of the high spatial frequency component (spatial frequency band B ₁ ) in the background region (region R ₁ ) looks like one motion. As a result, the high spatial frequency components of the non-moving star region appear to rise, and the star region appears to be stopped. On the other hand, as illustrated in FIG. 4B, when the observer 101 observes the image M from a long distance D ₂ (where D ₂ > D ₁ ), the high spatial frequency component moving in the background region is Become invisible. As a result, only the low spatial frequency components of the star region appear to move, and the star region appears to move.

  When the observer 101 directly observes the image M as illustrated in FIG. 5B, it is assumed that the high spatial frequency components of the non-moving star-shaped region appear to rise, and the star-shaped region appears to be stopped. . Even in such a case, as illustrated in FIG. 5B, the observer 101 arranges the diffusion member 102 which is a medium such as frosted glass having a high degree of light diffusion between the image M and the observer 101 and the observer 101 When observing the image M through it, the high spatial frequency component moving in the background region becomes invisible. As a result, only the low spatial frequency components of the star region appear to move, and the star region appears to move.

  When the observer 101 with poor visual acuity observes the image M with eyesight correcting glasses, the high spatial frequency component of the unmoved star-shaped region appears to be raised, and the star-shaped region seems to be stopped. It is assumed that In this case, when the observer 101 removes the glasses and observes the image M, only the low spatial frequency components of the star region appear to move, and the star region appears to move. Also, when the observer 101 with good visual acuity observes the image M, it seems that the star-shaped region stops, but when the observer 101 with poor visual acuity observes the image M, the star-shaped region moves. appear.

[Modification 1 of Second Embodiment]
Similarly to the first modification of the first embodiment, a static image components PS _j may have a motion. In this case, the video generation device 2 (FIG. 1) further includes a static component generation unit 17-i (where i = 1, 2). The processing content of the static component generation unit 17-i is as described in the first modification of the first embodiment.

[Third embodiment]
In the second embodiment and its first modification, the distance (observation distance) δ from the image M to the observer 101 is set to a relatively small range δ ₁ ≦ δ ≦ δ ₂ (where 0 <δ ₁ <δ ₂ ). If it cannot be changed, the threshold value TH may be increased, and conversely, the observation distance δ may be changed in a relatively large range δ ₁ ≦ δ ≦ δ ₃ (where 0 <δ ₁ <δ ₂ <δ ₃ ). If possible, the threshold value TH may be lowered. The higher the threshold value TH, without significantly changing the distance from the image M to the viewer, or gives the impression of a region R ₂ is stationary, it or give the impression of motion. The lower the threshold TH, can not be changed unless significantly alter the viewing distance δ the impression of movement of the region R _2, on the other hand, the region R ₂ when image M was observed in nearly stationary You can clearly give the impression that you are.

As illustrated in FIG. 1, the video generation device 3 of the present embodiment includes a band separation unit 11, dynamic component generation units 12-1 and 12-2, weighted map storage units 13-1 and 13-2, and a superposition unit 14. -1, 14-2, the integration unit 15, and the threshold setting unit 36. The difference between the third embodiment and the second embodiment and its modification 1 is that the threshold value setting unit 36 receives information representing the range of the distance from the image M to the observer as an input and sets a threshold value TH according to the distance range. Is set and output. However, when the maximum value of the distance from the image M to the observer is δ ₂ (first value), the maximum value of the distance from the image M to the observer is δ ₃ (second value). Is larger than the threshold value TH (δ ₂ <δ ₃ ). For example, the larger the maximum value of the distance from the image M to the observer is, the smaller the threshold value TH may be. Alternatively, the threshold value TH may decrease monotonically in a broad sense with respect to the maximum value of the distance from the image M to the observer (not increase). Relationship). Alternatively, only when the maximum value of the distance from the image M to the viewer is in a specific range, the threshold TH when the maximum value of the distance from the image M to the viewer is [delta] ₂ is an observer from the image M it may be larger than the threshold TH when the maximum value of the distance to it is [delta] _3.

The set threshold value TH is input to the band separation unit 11, and the band separation unit 11 converts the input image P into two based on the threshold value TH as described in {Processing of the band separation unit 11} of the second embodiment. It separates into spatial frequency bands B ₁ and B ₂ to obtain and output image components P _i of each spatial frequency band B _i (where i = 1, 2). Others are as described in the second embodiment and its first modification.

[Fourth embodiment]
When the observer has low visual acuity, no matter how small the observation distance is, the movement in the high spatial frequency band may not be clearly perceived. Therefore, when the eyesight of the observer is low, the threshold value TH may be reduced so that the observer can perceive the given motion in all the regions.

As illustrated in FIG. 1, the video generation device 4 of the present embodiment includes a band separation unit 11, dynamic component generation units 12-1 and 12-2, weighted map storage units 13-1 and 13-2, and a superposition unit 14. -1, 14-2, the integration unit 15, and the threshold setting unit 46. The difference between the fourth embodiment and the second embodiment and the first modification thereof is that the threshold setting unit 46 receives an index representing the visual acuity of the observer as an input, sets a threshold TH according to the visual acuity, and outputs the threshold TH. is there. However, the threshold value TH when the index VA representing visual acuity is VA ₁ (first value) is smaller than the threshold value TH when the index VA representing visual acuity is VA ₂ (second value), and the index VA is VA. vision of time is _1, worse than the sight of when the index VA is VA _2. For example, the threshold value TH may be reduced as the visual acuity of the observer worsens, or the threshold TH may be broadly monotonically increased (not reduced) with respect to the visual acuity of the observer. Alternatively, only when the vision of the viewer is in a specific range, the threshold value TH at the time index representing the visual acuity VA is VA ₁ is smaller than the threshold value TH at the time index representing the visual acuity VA is VA ₂ Is also good.

The set threshold value TH is input to the band separation unit 11, and the band separation unit 11 converts the input image P into two based on the threshold value TH as described in {Processing of the band separation unit 11} of the second embodiment. It separates into spatial frequency bands B ₁ and B ₂ to obtain and output image components P _i of each spatial frequency band B _i (where i = 1, 2). Others are as described in the second embodiment and its first modification.

[Fifth Embodiment]
When the observer observes the image M through a medium that diffuses light, such as frosted glass (FIGS. 5A and 5B), the cutoff frequency may be set lower as the degree of light diffusion in the medium increases.

As illustrated in FIG. 1, the video generation device 5 according to the present embodiment includes a band separation unit 11, dynamic component generation units 12-1 and 12-2, weighted map storage units 13-1 and 13-2, and a superposition unit 14. -1, 14-2, an integration unit 15, and a threshold setting unit 56. The difference of the fifth embodiment from the second embodiment and its modification 1 is that the threshold setting unit 56 receives an index indicating the degree of diffusion of light of a medium interposed between the image M and the observer as an input. The point is that a threshold value TH according to the diffusion degree is set and output. However, the threshold value when the index H indicating the degree of diffusion of light in the medium is H ₁ (first value) is larger than the threshold value when the index indicating the degree of diffusion of light in the medium is H ₂ (second value). is small, the diffusion degree of light when the index H is H ₁ is greater than the degree of diffusion of light when the index H is H _2. For example, the threshold value TH may be reduced as the degree of light diffusion of the medium increases, or the threshold value TH may decrease in a broad sense monotonically with respect to the degree of light diffusion of the medium. Alternatively, only when the diffusion degree of light of the medium is in a particular range, threshold value when an index H representing the degree of diffusion of light of the medium is H ₁ is the index indicating the degree of diffusion of light of the medium H ₂ May be smaller than the threshold value when. Note that an example of the index H indicating the degree of diffusion of light in the medium is a haze (Haze).

The set threshold value TH is input to the band separation unit 11, and the band separation unit 11 converts the input image P into two based on the threshold value TH as described in {Processing of the band separation unit 11} of the second embodiment. It separates into spatial frequency bands B ₁ and B ₂ to obtain and output image components P _i of each spatial frequency band B _i (where i = 1, 2). Others are as described in the second embodiment and its first modification.

[Sixth embodiment]
As illustrated in FIG. 6, a video presentation device 100 that receives a video M obtained in the first to fifth embodiments or its modifications and presents the video M, and between the video M and the observer 101 An image presentation system having the diffusion member 102 arranged may be configured. However, the diffusion member 102 is a medium that can be interposed between the image M and the observer 101, and has a property of diffusing light. An example of the diffusion member 102 is frosted glass. As described above, the appearance that the observer 101 perceives when the observer 101 views the image M through the diffusion member 102 is the appearance that the observer 101 perceives when the observer 101 directly views the image M. And different.

The image M obtained in the first to fifth embodiments or its modifications is a moving image, and belongs to the spatial frequency band B _i (i-th spatial frequency band) in the region R _i (i-th region) of the image M. A dynamic video component PD _i (i-th dynamic video component) and a static video component PS _j (i-th static video band) belonging to a spatial frequency band B _j (a spatial frequency band different from the i-th spatial frequency band) (I, j｝ 1,..., N｝ and j ≠ i). However, the video M presented from the video presentation device 100 of the video presentation system according to the sixth embodiment includes the first video component belonging to the spatial frequency band B _i (first spatial frequency band) and the spatial frequency band B _j (the Any video may be used as long as the video includes a region where the second video component belonging to the second spatial frequency band different from the i-spatial frequency band) is superimposed. For example, the video M may be a still image instead of a moving image. Even if the image M is a still image, the appearance that the observer 101 perceives when the observer 101 views the image M through the diffusion member 102 depends on the observer's view when the observer 101 directly views the image M. It is different from the appearance that 101 perceives. A technique for giving a different impression depending on whether or not the observer 101 views the image M through the diffusion member 102 has not been known so far. Further, when the distance from the image M to the diffusion member 102 is increased, only the lower spatial frequency components are provided to the observer 101. In addition, by installing the diffusion member 102 having a higher degree of diffusion, only the lower spatial frequency components are provided to the observer 101. There is no known technique that gives a different impression depending on these.

[Other modified examples]
The present invention is not limited to the above embodiment. For example, superimposing unit 14-i (however, i = 1, ..., N ) of at least one of, may be obtained video component M _i by superimposing further additional image. Further, the integrating unit 15 may obtain the video M by further superimposing the additional video.

  The various processes described above may be executed not only in chronological order as described, but also in parallel or individually according to the processing capability of the device that executes the process or as necessary. In addition, it goes without saying that changes can be made as appropriate without departing from the spirit of the present invention.

  Each of the above devices is, for example, a general-purpose or dedicated computer including a processor (hardware processor) such as a CPU (central processing unit) and a memory such as a RAM (random-access memory) and a ROM (read-only memory). Is executed by executing a predetermined program. This computer may include one processor or memory, or may include a plurality of processors or memories. This program may be installed in a computer, or may be recorded in a ROM or the like in advance. Some or all of the processing units are configured using an electronic circuit that realizes a processing function without using a program, instead of an electronic circuit (circuitry) that realizes a functional configuration by reading a program like a CPU. You may. An electronic circuit constituting one device may include a plurality of CPUs.

  When the above configuration is implemented by a computer, the processing contents of the functions that each device should have are described by a program. By executing this program on a computer, the processing functions described above are realized on the computer. A program describing this processing content can be recorded on a computer-readable recording medium. An example of a computer-readable recording medium is a non-transitory recording medium. Examples of such a recording medium are a magnetic recording device, an optical disk, a magneto-optical recording medium, a semiconductor memory, and the like.

  The distribution of this program is carried out, for example, by selling, transferring, lending, or the like a portable recording medium such as a DVD or a CD-ROM on which the program is recorded. Further, the program may be stored in a storage device of a server computer, and the program may be distributed by transferring the program from the server computer to another computer via a network.

  A computer that executes such a program first stores, for example, a program recorded on a portable recording medium or a program transferred from a server computer in its own storage device. When executing the process, the computer reads a program stored in its own storage device and executes a process according to the read program. As another execution form of this program, the computer may read the program directly from the portable recording medium and execute processing according to the program, and further, each time the program is transferred from the server computer to this computer. The processing may be sequentially performed according to the received program. A configuration in which the above-described processing is executed by a so-called ASP (Application Service Provider) type service that realizes a processing function only by executing instructions and obtaining results without transferring the program from the server computer to this computer is performed. Good.

  Instead of executing a predetermined program on a computer to realize the processing functions of the present apparatus, at least a part of these processing functions may be realized by hardware.

1-6 Image generation device 100 Image presentation device

Claims (14)

Depending on at least one of the distance between the observer and the image, the observer's visual acuity, and the degree of diffusion of light in the medium interposed between the image and the observer, the difference in the spatial frequency perceived by the observer from the image An image generation device that generates an image having a different impression of a motion received by the observer from the image,
An image generation unit that generates an image including a first region and a second region that are different from each other;
In the first region, a first dynamic video component belonging to a first spatial frequency band and a first static video component belonging to a spatial frequency band different from the first spatial frequency band are superimposed. ,
In the second region, a second dynamic video component belonging to a second spatial frequency band different from the first spatial frequency band, and a second static video component belonging to a spatial frequency band different from the second spatial frequency band. Video components are superimposed,
The first spatial frequency band includes a high spatial frequency band,
The spatial frequency band different from the first spatial frequency band includes a low spatial frequency band different from the high spatial frequency band,
The second spatial frequency band includes the low spatial frequency band,
The video generation device, wherein a spatial frequency band different from the second spatial frequency band includes the high spatial frequency band. The video generation device according to claim 1,
The first spatial frequency band is the high spatial frequency band,
The spatial frequency band different from the first spatial frequency band is a low spatial frequency band different from the high spatial frequency band,
The second spatial frequency band is the low spatial frequency band,
The video generation device, wherein a spatial frequency band different from the second spatial frequency band is the high spatial frequency band. The video generation device according to claim 2,
The information representing the range of the distance from the video to the observer is input, and has a threshold setting unit that sets a threshold according to the range of the distance,
The high spatial frequency band comprises a spatial frequency whose absolute value is equal to or greater than the threshold or greater than the threshold,
The video generation device, wherein the low spatial frequency band includes a spatial frequency whose absolute value is less than the threshold or less than the vicinity of the threshold or whose absolute value is equal to or less than the threshold or equal to or less than the vicinity of the threshold. The video generation device according to claim 3,
The threshold value when the maximum value of the distance from the image to the observer is the first value is larger than the threshold value when the maximum value of the distance from the image to the observer is the second value,
The image generation device, wherein the first value is smaller than the second value. The video generation device according to claim 2,
An index representing the visual acuity of the observer is input, and has a threshold setting unit that sets a threshold according to the visual acuity,
The high spatial frequency band comprises a spatial frequency whose absolute value is equal to or greater than the threshold or greater than the threshold,
The video generation device, wherein the low spatial frequency band includes a spatial frequency whose absolute value is less than the threshold or less than the vicinity of the threshold or whose absolute value is equal to or less than the threshold or equal to or less than the vicinity of the threshold. The video generation device according to claim 5,
The threshold value when the index representing the visual acuity is a first value is smaller than the threshold value when the index representing the visual acuity is a second value,
The image generation device, wherein the visual acuity when the index is the first value is worse than the visual acuity when the index is the second value. The video generation device according to claim 2,
An index indicating the degree of diffusion of the light of the medium interposed between the image and the observer is input, and has a threshold setting unit that sets a threshold according to the degree of diffusion.
The high spatial frequency band comprises a spatial frequency whose absolute value is equal to or greater than the threshold or greater than the threshold,
The video generation device, wherein the low spatial frequency band includes a spatial frequency whose absolute value is less than the threshold or less than the vicinity of the threshold or whose absolute value is equal to or less than the threshold or equal to or less than the vicinity of the threshold. The video generation device according to claim 7,
The threshold when the index indicating the degree of light diffusion is a first value is smaller than the threshold when the index indicating the degree of light diffusion is a second value,
The image generation device, wherein the degree of diffusion of the light when the index is the first value is larger than the degree of diffusion of the light when the index is the second value. The video generation device according to claim 1, wherein:
(1) the way of movement of the first dynamic image component and the way of movement of the second dynamic image component are the same or approximate, and
(2-1) the first static video component and the second static video component are still components, or (2-2) the first static video component is The second static video component is a component having a smaller motion than the first dynamic video component, and the second static video component is a component having a smaller motion than the second dynamic video component. A video image generating apparatus, wherein a typical video component moves in the same way as or similar to the second static video component. The video generation device according to any one of claims 1 to 9,
The image generation device, wherein the movement of the first dynamic image component and the second dynamic image component is a periodic vibration. The video generation device according to any one of claims 1 to 10,
The image generation unit,
A first superimposing unit that obtains a first video component in which the first dynamic video component and the first static video component are superimposed in the first region;
A second superimposing unit that obtains a second video component in which the second dynamic video component and the second static video component are superimposed in the second region;
An image generation device, comprising: an integration unit that obtains the image by at least superimposing the first image component and the second image component. Depending on at least one of the distance between the observer and the image, the observer's visual acuity, and the degree of diffusion of light in the medium interposed between the image and the observer, the difference in the spatial frequency perceived by the observer from the image An image presentation system that presents images having different impressions of movements received by the observer from the images,
A video presentation device that presents a video including a region where a first video component belonging to a first spatial frequency band and a second video component belonging to a second spatial frequency band different from the first spatial frequency band are superimposed;
A diffusion member having a property of diffusing light, which is a medium that can be interposed between the image and the observer,
The appearance perceived by the observer when the observer views the image through the diffusion member is different from the appearance perceived by the observer when the observer directly views the image,
The first spatial frequency band includes a high spatial frequency band,
The spatial frequency band different from the first spatial frequency band includes a low spatial frequency band different from the high spatial frequency band,
The second spatial frequency band includes the low spatial frequency band,
The video presentation system, wherein a spatial frequency band different from the second spatial frequency band includes the high spatial frequency band. Depending on at least one of the distance between the observer and the image, the observer's visual acuity, and the degree of diffusion of light in the medium interposed between the image and the observer, the difference in the spatial frequency perceived by the observer from the image A video generation method for generating a video having a different impression of a motion received by the observer from the video,
An image generation step of generating an image including a first region and a second region different from each other,
In the first region, a first dynamic video component belonging to a first spatial frequency band and a first static video component belonging to a spatial frequency band different from the first spatial frequency band are superimposed. ,
In the second region, a second dynamic video component belonging to a second spatial frequency band different from the first spatial frequency band, and a second static video component belonging to a spatial frequency band different from the second spatial frequency band. Video components are superimposed,
The first spatial frequency band includes a high spatial frequency band,
The spatial frequency band different from the first spatial frequency band includes a low spatial frequency band different from the high spatial frequency band,
The second spatial frequency band includes the low spatial frequency band,
The image generation method, wherein a spatial frequency band different from the second spatial frequency band includes the high spatial frequency band. Program for causing a computer to function to claims 1 and any of the video generation equipment 11.

Images