EP3830796A1

EP3830796A1 - Method and data-processing system for synthesizing images

Info

Publication number: EP3830796A1
Application number: EP19758614.2A
Authority: EP
Inventors: Michael Wick; Christian Wojek; Vladan Blahnik; Torsten Sievers
Original assignee: Carl Zeiss AG
Current assignee: Carl Zeiss AG
Priority date: 2018-07-27
Filing date: 2019-07-29
Publication date: 2021-06-09
Also published as: DE102018118187A1; NZ772353A; JP7489960B2; CA3107886A1; CN112513933A; AU2019309552B2; AU2019309552A1; US20210150804A1; US12008708B2; JP2021532649A; KR20210038609A; US20240029342A1; KR102686182B1; WO2020021121A1

Abstract

The invention relates to a method for creating a second series of individual images by means of a first series of individual images, the individual images of the first or the second series of individual images having been captured by means of an objective, comprising the following steps: determining the entrance pupil and the field of vision of the objective for the individual images of the first series and creating or adapting the individual images of the second series in accordance with the entrance pupil and the field of vision of the objective of the individual image in question of the first series.

Description

Process and data processing system for the synthesis of images

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a method for creating a second sequence of individual images by means of a first sequence of individual images, the individual images of the first sequence of individual images being recorded using a lens. In particular, the invention relates to a software-based method for the modification or / and the creation of moving images based on predefined parameters.

2. Description of the prior art

Nowadays, animations are generated for example for feature films, computer games, medical imaging, security applications for face recognition, in computer-based simulations, in virtual reality applications or in industrial measurement technology by means of image synthesis, also called rendering or rendering. One technique used here, for example, provides for the virtual beam path to be calculated from a virtual sensor point through a virtual pinhole aperture into a virtual three-dimensional scene and for the sensor point to be assigned the corresponding color and intensity depending on the point of impact in the virtual scene.

There is often a desire to use this form of image synthesis to overlay or combine film sequences with real filmed scenes. Thus, for example, it should be embedded in a real filmed sequence of pictures, which shows, for example, a studio situation with real actors, a sequence of pictures with image content generated as described, which, for example, shows virtual, computer-animated creatures or backgrounds.

The aim is to integrate the image content to be embedded in the real image sequence as seamlessly as possible. Depending on the image content, it is not necessarily a matter of suggesting to the viewer that it is actually real content, but rather creating the impression that the entire image content is natively without Post processing has arisen. A great deal of effort is currently being put into this impression, which primarily involves image-by-image manipulations in post-production. Using image processing programs, changes are made to individual image contents with the aim of fitting them as closely as possible into the real filmed scenery. Most of the image post-processing has to be done manually and is based on experience. For a convincing viewing experience, it is crucial that the modeled special effects blend to a certain extent with the real image content and that the viewer perceives no break. The settings applicable to the respective situation (FOV, opening, entrance pupil, position, focal length, etc.) are simulated using physical models.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a method for generating a second sequence of individual images by means of a first sequence of individual images, which meets the above requirements, provides a higher degree of seamless integration and at the same time requires less manual effort. This object is achieved by a method according to independent claim 1.

The method according to the invention for creating a second sequence of individual images by means of a first sequence of individual images, the individual images of the first or the second sequence of individual images being recorded using a lens, comprises the steps of determining the properties of a light beam within the lens for the individual images of the first sequence and the creation or adaptation of the individual images of the second sequence taking into account the properties of a light beam within the lens of the respective individual image of the first sequence.

The adaptation of the image content of the individual images of the second sequence can be a subsequent conversion of already calculated or otherwise generated individual image sequences. For example, the individual images of the first sequence can be combined exactly with the images of the second sequence. The creation of the individual images of the second sequence can be the creation of the individual image sequence by means of an objective, that is to say the taking of an image sequence in the conventional sense, or a calculation a single image sequence in the sense of an image synthesis (rendering) based on a virtual scene. For example, individual elements such as people or objects can be extracted from the images of the second sequence and integrated into the images of the first sequence. In a preferred embodiment, the step of determining the properties of a light beam within the lens comprises determining the entrance pupil and the field of view of the lens for the individual images of the first sequence.

The step of determining the entrance pupil and the field of view, also called field of view (FoV), of the lens makes it possible, when adapting or creating the image content of the individual images of the second sequence, the exact viewing direction, the field of view actually captured by the lens and to consider the entrance pupil for the calculation or conversion of the image content of the second sequence.

For example, the entrance pupil and / or the field of view may change slightly, but still noticeably, when the lens is focused to adapt to a different lens-subject distance. This effect manifests itself, among other things, as a change in the image section and is also known as pumping ("focus breathing"). While this effect is hardly relevant in single shots, it is noticeable in film sequences and is particularly noticeable when simu is subsequently inserted However, if the entrance pupil and the field of view are already taken into account when calculating the image content to be added, the image content can be combined in a much simpler way and, above all, largely without manual intervention respectively.

A preferred embodiment of the invention comprises a step of merging the image content of a first sequence of individual images and the image content of a second sequence of individual images, the merging adapting the image content of the individual images of the second sequence to the image content of the individual images of the first sequence or a creation of the individual images of the second sequence comprises, taking into account the entrance pupil and the field of view of the lens of the respective individual image first sequence. After the generation or adaptation of the second sequence of individual images with knowledge of the information relating to the position of the entrance pupil and the field of view of the lens, the two image sequences are combined - for example, a superimposition of both image sequences or an insertion of an image content of the second individual image sequence in the image content of the first sequence of images - possible without major adjustments.

In a further embodiment of the invention, in the step of adapting or creating the individual images in addition to the entrance pupil and the field of view, a position of an exit pupil, a depth of field, a possibly also color-dependent vignetting, a distortion, a bokeh, one Color errors, a focus, a position of lens elements within a lens, an aperture, an exposure time, a color phenomenon and / or a reflex within the camera must be taken into account. The parameters mentioned can be taken into account individually or in any combination. Furthermore, other relevant parameters, such as the position of light sources, the type of light source, the distribution and intensity of shadows, motion blur, etc., can also be recorded. With the light source, for example, the spectral distribution of the light, the radiation characteristic, the intensity of the radiation etc. can be recorded. The more properties of the lens or the scene are available and taken into account in the step of adapting or creating, the better it is possible to adapt the image content of the second image sequence to that of the first image sequence.

If a sufficiently high number of the parameters mentioned is taken into account in the step of adapting or, in particular, creating the individual images, the viewer can be given the impression that the combined sequence of images would have arisen without a subsequent combination.

In one embodiment of the invention, it is provided that the step of creating the individual images of the second sequence comprises creating the individual images by means of rendering a virtual scene. This is a common requirement and can be done using the detection of the position of the entrance pupil in the scene and the field of view of the lens for the individual images of the first sequence can be solved in a simple manner.

Alternatively, in one embodiment of the invention, the step of adapting the individual images of the second sequence can precede the creation of the individual images by means of a lens for a camera. The lens for the camera does not have to be the same lens with which the first sequence of the individual images was taken. Rather, on the basis of the determination of the entrance pupil and the field of view, the image content of the second individual image sequence can be converted in such a way that the first and the second sequence of individual images can be combined without problems.

In a development of the invention, it is provided that the step of determining comprises recording one or more imaging parameters of the objective when the first sequence of the individual images is recorded. The imaging parameters thus acquired for each individual image or for a plurality of individual images - such as the entrance pill, the field of view, etc., can be used when creating or adapting the second sequence of the individual images. This reduces the effort for assembling the first and the second sequence of the individual images. For example, in the case of a so-called blue screen or green screen recording, in which actors or objects are recorded against a neutral (for example blue or green) background, the parameters used in this recording are recorded, in particular also time-resolved, and in the creation of a virtual one Scene based on this shot. This offers the advantage that no subsequent calculations regarding the settings that may be used have to be made, the image contents of the two individual image sequences can be combined in a simple manner and the end result appears very realistic / authentic.

In a further development of this embodiment, it is provided that the imaging parameters of the lens are used in real time to create the individual images of the second sequence. This can be used, for example, to create a green screen / To pass on the blue screen scene during the creation, i.e. the recording, in real time to a simulation computer, which realizes the intended combination with already prepared image content or with image content currently calculated and displays it on a display such as a monitor or an eyepiece. A corresponding blue screen / green screen image can thus be assessed as it is being created and corrected or repeated, if necessary.

In one embodiment of the invention, it is provided that the step of determining the properties of a light beam for a first lens is carried out and the step of creating the individual images of the second sequence is additionally carried out taking into account the properties of a light beam within a second lens. Thus, for example, a first individual image sequence, which was recorded with a first lens (for example a wide-angle lens), can be converted into a second individual image sequence, which then gives the impression that it was recorded with another lens (for example a telephoto lens) Service. In a further development of the invention, it is provided that the step of determining comprises recording a chronological sequence of imaging parameters. Thus, in particular in the case of a film recording which comprises the recording of a series of individual images in a narrow chronological order, the parameters required for joining can be recorded and taken into account for all individual images or for a specific subset of the individual images. For example, before the actual shooting begins, the camera operator can play through a recording in advance in a virtual scene with a virtually working camera and thus plan the scene to be recorded. This can be called pre-visualization or pre-visualization.

In this way, for example, different camera settings or different types of lenses can be tried out and checked with regard to artistic aspects and / or a possible technical feasibility. Possible time-resolved parameters can be, for example, the position of the lens, the direction of the lens, the current settings regarding focus, aperture and / or zoom. This Recordings can be used in a later step to plan a set.

Since the recording time of a film is usually expensive and often limited, the pre-visualization by means of rendering is used in order to minimize the general costs. The advantage of pre-visualization is that a director, cameraman or VFX supervisor with various staging and art application options such as lighting, camera placement, movement and optical settings of the lens such as focus section, focal length or You can experiment with depth of field, direction and editing without significant production costs.For projects with a larger budget, the directors work with actors in the visual effects department or in special rooms.

Previsualizations can add music, sound effects and dialogs to emulate the appearance of fully produced and edited scene sequences. They are most commonly used in scenes with stunts and special effects (such as chroma key). During the pre-visualization, digital videos, photography, hand-drawn art, clip art and 3D animations are combined. In addition to the film industry and photography, rendering can be used for pre-visualization in construction planning, cosmetic surgery or the positioning of medical implants. In this context, the method according to the invention, as just described, can additionally include planning a recording of the first sequence of individual images on the basis of the recording of the temporal sequence of imaging parameters and / or recording the first sequence of individual images using the recording of the temporal sequence of imaging parameters , As already explained, this enables the creation of image sequences with a high degree of pre-planning by means of a very realistic recording simulation.

Furthermore, the invention relates to a data processing system with means for executing the method according to the invention and a computer program. With the invention, the optical design, that is to say the dimensions, properties and the position of the lenses within a lens, can be used in the simulation of a scene. As already explained, modern animations for feature films are generated using rendering. Virtual rays from a virtual sensor pixel are tracked through a virtual pinhole aperture in a virtual three-dimensional scene. The pixel then receives a corresponding color and intensity, depending on where the beam hits the scene. The present invention replaces the simple pinhole model with the ray tracing of an optical design program. This leads to an extremely realistic simulation of the lens. To further increase the degree of reality, wave-optical effects can be simulated in addition to or in addition to the ray tracing method. Here, for example, the point spread function can be calculated by means of a diffraction integral.

A possible embodiment of the invention can consist of using a three-dimensional computer model of a film set for planning scenes (pre-visualization). In such a model, scenes to be filmed can, for example, only be roughly modeled and / or animated and - based on the desired scene - requirements for the actor, camera (and their settings and positions), the required equipment, scenery and / or special effects be derived. Before the start of shooting, the cameraman plans the recording in a virtual scene with a virtual camera. With the realistic simulation of the camera, various camera settings can be tested here, for example, before the actual rotation. In this way, costs can be saved, unexpected situations can be recognized and scenes can be better planned. For example, the focus adjustment, which is usually carried out manually, can be practiced particularly in the case of fast-moving subjects, or the suitability of certain lens types (real or unrealized prototypes) can be tested. Attitudes regarding artistic aspects and technical feasibility can also be tried out. For example, position, direction, focus, aperture, zoom position can be saved in a time-resolved manner in the simulation. This information is then used to plan the set. Optionally, this data can then be transferred to an electronically controlled real camera and this sequence of settings can be played on the real camera. Another embodiment can include the partial or complete, photorealistic creation of film scenes based on 3D models. Real film scenes can be overlaid with computer-animated scenes, for example virtual living beings in real sceneries or / and actors in virtual sceneries or combinations of both. So-called green screens are often used for this. For the quality of the combination of real scenes with computer animations, it is important how well the lighting conditions, the motion blur, the color rendering, the noise etc. in the model match the recording of the real scene. Productions in which these modeled special effects do not merge with the scenery do not immediately seem professional enough to the viewer. The modeling of the lens with a pinhole model only takes into account the (constant) focal length of the lens in a very simple manner. The perspective rendering of a scene alone depends on the position of the entrance and exit pupils and the change in the focal length of the lens. These pupil positions are functions of the focusing distance and zoom position that depend on the lens. Also important is the f-number, which determines the depth of focus of the scene. In addition, there are a number of lens parameters such as distortion, marginal light drop, color rendering deviations, chromatic errors, reflex dependencies etc. Specifically, for example, position, direction, focus, aperture and zoom position can be saved in a time-resolved manner during image acquisition in a green screen scene. These settings are used when creating the virtual scene. The advantages are an authentic look and a simple overlay of the images.

As an alternative or in addition, in the case of a green screen scene, for example, position, direction, focus, aperture and zoom position can be passed on directly to a real-time simulation during image recording and both images superimposed in the eyepiece or on the display.

Altogether, a number of advantages can be realized with the invention, depending on the embodiment: Setting times of the camera can be shortened by pre-setting the settings within a virtual scene. Entire camera recordings can be planned in advance, and camera settings and changes can be recorded in a virtual camera and displayed on a real camera become. The recording quality of certain film recordings, especially in scenes that cannot be repeated as often as required, can be improved by training the camera operator beforehand. When recording a virtual scene, the same impression as when recording a real scene can be generated by an exact simulation of the real lens. Simulated scenes can be animated / generated with a real camera. Virtual prototyping for a lens / camera that actually exists can be carried out.

One embodiment of the invention provides for a 3D image simulation to be carried out as part of a computer program with stored and interpolated point spread function data. The process has the following steps:

Determining a size, a shape and a position of the exit pupil of a lens for a selected group of pixels; For example, a 2-D point grid with a grid spacing of approx. 5.4 mm can be selected for this;

Interpolation of the size, shape and position of pixels between the selected pixels for other image positions;

Entering an object space function; the object space function can be understood as a three-dimensional function of intensities depending on the distance relative to the entrance pupil of a lens; the object space function includes, for example, the spectral properties such as RGB data or grayscale data and / or the distance from the object to the entrance pupil (depth map);

Creating a point spread function by linking the object space function with a lens function, which takes care of the assignment of object space and image space; In this way, the point spread function comprises the optical design data of the objective, possibly including the coating data of individual or all optical elements in the objective;

Integration of the point spread function via object coordinates; Integration of the point spread function via the shape of the exit pupil so as to take account of a wavefront deformation caused by the exit pupil;

Generate a rendered object space.

In addition, in this embodiment, compensation for digital aberration (distortion and / or shading, etc.) can take place.

Another alternative embodiment of the invention provides for a 3-D image simulation to be carried out using data from an optical transfer function. The process has the following steps:

Interpolation of a size, a shape and a position of pixels between the selected pixels for other image positions in order to maintain an exit pupil function; Entering an object space function; the object space function can be understood as a three-dimensional function of intensities depending on the distance relative to the entrance pupil of a lens; the object space function can be obtained, for example, from a combination of the wavelengths and an optical transfer function; in order to obtain the optical transfer function, the exit pupil function (autocorrelation) is folded;

Computing a continuous Fourier transform from the object space function;

Integrating the product of optical transfer function and Fourier-transformed object space function via the exit pupil coordinates for a fixed wavelength;

Repetition of the calculation over many wavelengths; Integrate over the wavelengths over each color channel (spectral response function) and the spectral distribution of the light source; Generating an image for each color channel (RGB);

Overlay the images for each color channel (RGB) to get a realistic image.

In the above-mentioned embodiments, the problem arises of performing a Fourier transformation for strongly defocused object space points. This requires a very high raster sampling of the exit pupil, for example 10,000 x 10,000 instead of 30 x 30. This is time-consuming and the run times are very long.

Accordingly, an alternative embodiment of the invention provides for performing a ray tracing-based rendering of a 3-D image simulation. The method is based on the fact that the light rays incident in a lens are traced back to the light source. The process has the following steps:

Calculation of a beam direction; for example placed within the limit defined by the exit pupil;

Creating a beam function; for example, this can represent a probability function and indicate the direction-dependent distribution of beams and, for example, the input coordinates linking the input coordinates with an input beam can result in hundreds to several million output beams, depending on the quality of the rendering that one would like to achieve.

Simulate all rays up to the light source;

Integrate over the angular space of the light source and the distance to the light source for all discrete output beams; Repeating the process for each input beam leading from the lens to the object; for example for 10,000 rays;

Integrating all output beams arriving at the light source for all input beams; Create an image.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. In these show:

1A, 1B show a flow chart and a schematic representation of a first method according to the invention; 2A, 2B show a flow chart and a schematic representation of a second method according to the invention;

FIGS. 3A, 3B show a flow chart and a schematic representation of a third method according to the invention; and

Figure 4 is a schematic representation of a fourth invention

Process.

DESCRIPTION OF PREFERRED EMBODIMENTS

FIGS. 1A, 1B show a first method according to the invention for creating a second sequence of individual images by means of a first sequence of individual images. In a first step S1 1, a first sequence of individual images is generated by means of a real camera 10. For the first method, it is irrelevant whether this first sequence of individual images is actually saved. The individual image sequence can be saved, but it can also only be generated and not recorded. In a second step (S12), the camera settings and the camera positions of the first image sequence are recorded. This is preferably done during the generation of the image sequence, ie the recording of the first image sequence by means of the real camera 10. If this is carried out during the recording, the recording of the first image sequence can be omitted. The camera settings and positions can be at least the position of the entrance pupil and the field of view of the taking lens, but additional parameters such as an aperture / aperture, exposure time, zoom position, focus etc. can also be recorded.

In a further step (S13), the camera settings and positions are transmitted as data 11 to a virtual camera 12. This step can also take place after the first steps S1 1, S12 or simultaneously with these. The first sequence of images (S1 1), the camera settings and positions (S12) can be recorded and the same (S13) transmitted (S13) can be carried out at the same time or, with suitable intermediate storage, one after the other with a time offset. The camera settings and positions can be transferred accordingly

The virtual camera 12 can be, for example, a parameter set for settings of an image synthesis program 18, with which a virtual image sequence 14, resulting from a virtual scene 16 corresponding to the further step S14, can be generated by means of the camera settings and positions , The image synthesis program can be, for example, a calculation program that uses a ray tracing algorithm. A model of the camera 10 can be created in the image synthesis program by means of the data obtained from the real camera 10 and possibly already known data. Using this model - the virtual camera 12 - on the one hand, lens-specific and thus relevant effects for optical imaging can be included. This enables a realistic simulation of the lens used or the entire camera 10. On the other hand, due to a possibly also time-resolved detection of the entrance pupil and the field of view, the movement of the real camera 10 and thus possibly also connected effects such as the influence of lighting conditions at different locations or Effects such as motion blur, color reproduction or noise when creating the virtual image can be influenced.

In a specific embodiment of this method, for example, a real camera 10 could be used to a certain extent as a controller of a virtual camera 12 for generating a virtual image sequence 14 within a virtual scene 16. In this way, a computer-animated scene can be created in a simple manner.

FIGS. 2A, 2B show a second embodiment of a method according to the invention. For the following embodiments, the same reference numerals are used for the same or comparable features and are not explained again separately in order to avoid repetitions. The method of FIGS. 2A, 2B also provides, as in the method described above, for capturing a first sequence of images by means of a real camera 10 (S21). It is provided in this method that the recording of the first sequence of images takes place in an actually existing real scene 20 and results in a real sequence of images 22. As already explained above, the camera settings and positions are also recorded in this method (S22) and transmitted to a virtual camera 12 (S23).

The information obtained in these steps S21-S23 is now used to, in a further step (S24), a second image sequence 24 with a virtual camera 12 within a virtual scene 16 by means of an image synthesis program 18, taking into account the camera settings and positions 11 to create. When the second, virtual image sequence 24 is generated, the information 1 1 is already available, for example about the position of the entrance pupil and the field of view of the camera 10 of the real image sequence 22. In a concrete application, the first real image sequence 22 could, for example, be a green screen scene during a film recording. In such a case, the position and orientation of the camera 10, focus, aperture, zoom position during the image acquisition could be recorded in a time-resolved manner. This information can then be used accordingly in the creation of the virtual scene 16 and ultimately in the creation of the virtual image sequence 24. In a further step S24, the first, real image sequence 22 and the second, virtual image sequence 24 can be combined to form an assembled image sequence 26. In this example of the green screen technology, the virtual image content of the virtual image sequence 24 can be integrated into the image content of the real image sequence 22. The largely seamless insertion option results in an authentic appearance of the merged image sequence 26. In addition, the superimposition / insertion can be carried out in a very simple manner.

A further embodiment of the method according to the invention is shown in FIGS. 3A,

3B. In a first step (S31), a virtual scene 16 is created taking into account the spatial and other data 13 of a real scene 20. In a second step (S32), a first image sequence 24 is recorded by means of the virtual camera 12. Since it is not important in this embodiment to save this first image sequence 24. Rather, the aim of this embodiment is to give the camera operator the opportunity to test and plan various settings of the camera before actually taking a real image sequence 22. With a realistic simulation of the real camera 10 by the virtual camera 12, different camera settings and positions can be planned and tried out in this way, for example, also with regard to artistic aspects and technical feasibility.

Accordingly, the camera settings and the camera positions of the virtual camera 12 are recorded in a further step (S33). This is preferably time-resolved, ie a time stamp is assigned to each recorded camera setting and position. The settings and positions for each individual image of the individual image sequence are preferably recorded. Depending on the design, the frequency of recording can also be adapted to the circumstances. For example, a lower frequency than for each image can be provided. The frequency can be adjustable to a fixed frequency - every nth image - or can be adapted depending on changes taking place. The recorded settings can include position, direction, focus, aperture or zoom position, for example. The information captured in this way can then be used to plan the set and camera rotation. Optionally, the camera settings and positions recorded in this way can be transferred to a real camera 10 in a further step (S34). These settings can then be taken into account in the real recordings of the second sequence of individual images. For example, the camera settings can be played back in the real camera 20 as a setting sequence during the recording, so that the cameraman is relieved and has to worry about fewer recording details during the recording.

Another embodiment of the method according to the invention is shown in Figure 4 Darge. The method as described in FIG. 4 provides for steps S41 and S42, two method steps which can take place independently of one another in time. Step S41 creates a starting basis for a subsequent rendering, referred to here as the VFX generation. The starting point can be, for example, the data of a virtual scene, which contain the necessary three-dimensional information.

Any other base can also be used which makes it possible to render from three-dimensional information in such a way that a sequence of individual images is produced. For example, it can also be a preprocessed two-dimensional image with additional depth information or a two-dimensional image in which a 3D position in a three-dimensional scene is assigned to each pixel. In this case, the 3D information can be integrated into the two-dimensional image, predefined with regard to the scene depicted, emulated for the scene depicted or generated for the scene depicted, for example on the basis of three-dimensional data obtained by capturing the real image depicted Scene have been obtained using 3D sensors, for example.

In step S42, lens / camera data are recorded, which can be assigned to a sequence of individual images (frames of a film sequence). The detection can relate, for example, to a lens of a camera and can be carried out, for example, by means of the lens.

A film sequence (S43) can preferably be recorded simultaneously with the acquisition of the lens / camera data (S42). The lens / camera data can comprise a sequence of lens data, the sequence each having, for example, a set of lens / camera data for the single image (frame). Alternatively or additionally, only the entire sequence of individual images (film sequence) can be assigned lens / camera data. The lens / camera data can include, for example, information about possible properties and / or settings of the lens itself, such as identification of the lens type or of the individual lens, information about the type of lens, the focal length of the lens, a calibrated focus distance, a calibration ten T-stop value, a depth of field, a hyperfocal distance, a horizontal angle of view or the position and / or size of the entrance pupil, this lens / camera data can, for example, from a real camera or a real lens while recording a first sequence of individual images (film sequence).

The determination / calculation and / or recording of the lens / camera data can take place, for example, for each focus point and each effective T-stop value and / or for each individual image (frame).

Alternatively or additionally, the lens / camera data can include specific physical data which characterize one or more, preferably all, optical elements such as, for example, lenses, diaphragms and / or filters in the lens. These physical data can be, for example, the shape of the lens, the aperture of the element, the maximum aperture of a lens, for example (smallest f-number), the spectral transmittance and the like. act. In general, the specific physical data can be such data that allow a conclusion to be drawn on the optical design of the lens and thus a calculation of the imaging properties and / or the implementation of a method that enables ray tracing, ray casting, a point spread function or a use the optical transfer function.

Additionally or alternatively, the lens / camera data can include information about the three-dimensional structure of the real filmed scene. The acquisition of this 3D data (S44) can take place, for example, in parallel with the acquisition of the properties and / or settings of the objective (S42). The 3D data can be integrated into the lens / camera data. Alternatively or additionally, the 3D data can also be added to the film sequence data (S45).

When capturing the 3D data, one or more 3D sensors can be used, for example, which generate spatial data, for example via optical or acoustic scanning of the filmed scene, which can be assigned to the filmed sequence of individual images (film sequence). The sensor or sensors can for example be arranged separately from the lens or the camera. The sensor or sensors are preferably located on the camera or lens or are integrated in the camera or lens. Alternatively or additionally, the lens / camera data can include position, position and / or movement data, which are additionally recorded in a temporally resolved manner, that is to say, for example, can be assigned to the individual images (frames) of the sequence of individual images (film sequence). The position, position and / or movement information enable the position of the camera or / and the lens with respect to the filmed real scene to be determined and the orientation of the camera or / and the lens with respect to the filmed scene. With a temporally resolved acquisition, information about the movement of the camera and / or the lens can also be acquired or derived directly or indirectly. For example, movements of the camera and / or the lens can be derived from the change in the position or the position. Alternatively or additionally, sensors can be used which directly detect movement of the camera / lens, such as gyro sensors.

In summary, the lens / camera data can include lens-specific data, 3D data of the real scene or / and position / position / movement data.

It can be provided that this lens / camera data is further processed in real time during the recording and made available for rendering (S46). As an alternative or in addition, the lens / camera data can be recorded and only used in a subsequent further processing step, which takes place after the recording (S47).

Rendering occurs in step S48, i.e. generating a two-dimensional image based on three-dimensional data.

The lens / camera data (S46, S47) can be taken into account when rendering.

The rendering can be done using an algorithm that uses one or more of the following methods: a ray tracing (ray function), a raycasting, a point spread function and / or an optical transfer function. Alternatively or additionally, as already explained above, for example, a pre-processed two-dimensional image with depth information or a two-dimensional image with integrated three-dimensional information can be used to generate the two-dimensional image. The rendering can also only represent a correction of an already existing two-dimensional image on the basis of the lens / camera data.

By using the lens / camera data, the rendered individual image (frame) or the sequence of individual images (film sequence) can be given an appearance that gives the impression that it is with the lens / camera that corresponds to the objects - jective / camera data was heard, recorded. The lens / camera data can be used for the rendering in real time during the recording of the lens / camera data. The lens / camera data can be made available to the render process in real time (S46), for example by means of a wireless or wired transmission of the lens / camera data to a render computer, and for rendering be used. Alternatively or additionally, it can be provided that lens / camera data which have already been recorded beforehand are used for the rendering (S47). It can be provided that the lens / camera data contain, for example, only objective and / or lens-specific data that are not time-resolved.

As an alternative or in addition, the lens / camera data can comprise, for example, only position and / or position and / or movement data. In one embodiment, different lens / camera data can also be used in combination in the rendering. For example, non-time-resolved lens or / and lens-specific data of a first lens can be combined with position and / or position and / or movement data of a second lens / second camera. For example, a film sequence filmed with a first lens can provide position and / or position and / or movement data for rendering with the objective and / or lens-specific data of a second lens. This creates the impression that a film sequence was filmed with a different lens. The rendering can take place in real time or take place in a subsequent step. The rendering can, for example, produce film sequences with a resolution of 2K in real time at a frame rate of 24 fps. With increasing computing power, resolutions in 4K or 8K with the frame rate mentioned are also possible.

The rendered film sequences can be displayed during or after generation (S44) on a rendering monitor (S49). The first sequence of individual images (first film sequence) rendered in this way including the lens / camera data can be combined in a subsequent step S50 with a real filmed second sequence of individual images (second film sequence) (“composite”). This is the first film sequence have been rendered or corrected with the lens / camera data with which the second film sequence was filmed, the two film sequences can be combined in a simple and seamless manner.

The film sequences combined to form a film sequence can be recorded (S51) and displayed on a composite monitor (S52).

Claims

1. A method for creating a second sequence of individual images by means of a first sequence of individual images, the individual images of the first or the second sequence of individual images being recorded using a lens (S1 1), with the following steps: - Determining the properties of a light beam within a Lens for the

Single images of the first sequence (S 12);

- Creating or adapting the individual images of the second sequence taking into account the properties of the light beam within the lens of the respective individual image of the first sequence (S14).

2. The method of claim 1, wherein the step of determining the properties of a light beam within the lens comprises determining the entrance pupil and the field of view of the lens for the individual images of the first sequence (S 12); or / and the step of creating or adapting the individual images of the second sequence taking into account the entrance pupil and the field of view of the lens of the respective individual image of the first sequence.

3. The method of claim 2, wherein the step of creating or adjusting comprises using a point spread function and / or an optical transfer function or a beam function.

4. The method according to any one of the preceding claims, with the step of joining together the image content of a first sequence of individual images and the image content of a second sequence of individual images (S25), the joining together adapting the image content of the individual images of the second sequence to the Image content of the individual images of the first sequence or a creation of the individual images of the second sequence comprises, in each case taking into account the entrance pupil and the field of view of the lens of the respective individual image of the first sequence.

5. The method according to claim 4, wherein the step of adapting or creating the individual images in addition to taking into account the entrance pupil and the field of view, taking into account a position of an exit pupil, a depth of field, a vignetting, a distortion, a bokeh, a color error, a focus, a position of lens elements within a lens, an aperture, an exposure time, a color phenomenon and / or a reflex within a lens.

6. The method according to any one of the preceding claims, wherein the step of creating the individual images of the second sequence comprises creating the individual images by means of rendering a virtual scene (S24).

7. The method according to any one of claims 1 to 5, wherein the step of adapting the individual images of the second sequence is preceded by creating the individual images by means of a lens for a camera (S21).

8. The method according to any one of the preceding claims, wherein the step of determining the properties of a light beam for a first lens and the step of creating the individual images of the second sequence takes place additionally taking into account the properties of a light beam within a second lens.

9. The method according to any one of the preceding claims, wherein the step of determining comprises:

Recording one or more imaging parameters of the lens when recording the first sequence of the individual images (S22); and wherein the step of customizing or creating comprises:

Using the mapping parameters when adjusting or creating the frames of the second sequence (S24).

10. The method according to claim 9, wherein the imaging parameters of the lens are used in real time to create the individual images of the second sequence.

1 1. The method according to any one of the preceding claims, wherein the step of determining comprises recording a chronological sequence of imaging parameters.

12. The method according to claim 1 1, comprising the steps of: a) planning a recording of the first sequence of individual images based on the recording of the temporal sequence of imaging parameters (S34); or / and b) recording the first sequence of individual images using the recording of the chronological sequence of imaging parameters (S34).

13. Use of a method according to one of the preceding claims in one or more of the fields of cinematography, photography, computer games, medical imaging, security applications such as face recognition, computer-based simulations, virtual reality and / or industrial measurement technology.

14. Data processing system, with means for carrying out the steps of one of claims 1-13.

15. A computer program with instructions that, when executed on a data processing system, cause the data processing system to do the following

Steps:

Determining a size, a shape and / or a position of an exit pupil of a lens for a predetermined group of pixels;

Entering an object space function; - Create a point spread function and / or enter an optical one

Transfer function and / or creation of a beam function;

Create an image.

16. Volatile or non-volatile computer-readable storage medium having a computer program according to claim 15.