WO2001058139A1 - Method and device for digitally detecting a photographic film - Google Patents

Method and device for digitally detecting a photographic film Download PDF

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Publication number
WO2001058139A1
WO2001058139A1 PCT/EP2001/001131 EP0101131W WO0158139A1 WO 2001058139 A1 WO2001058139 A1 WO 2001058139A1 EP 0101131 W EP0101131 W EP 0101131W WO 0158139 A1 WO0158139 A1 WO 0158139A1
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WO
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Patent type
Prior art keywords
characterized
scanning
data
pre
sensing element
Prior art date
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PCT/EP2001/001131
Other languages
German (de)
French (fr)
Inventor
Bernhard Lorenz
Reimund Münch
Marijan Grandverger
Ekkehard Gross
Tobias Epple
Wolfgang Ruf
Matthias MÄNDL
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Agfa-Gevaert Aktiengesellschaft
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40Picture signal circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/38Circuits or arrangements for blanking or otherwise eliminating unwanted parts of pictures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/0402Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0404Scanning transparent media, e.g. photographic film
    • H04N2201/0408Scanning film strips or rolls
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04Scanning arrangements
    • H04N2201/0402Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0416Performing a pre-scan

Abstract

The invention relates to a method for digitally detecting a photographic film (12) comprising a number of frames. The inventive method comprises the following steps: during a pre-scanning, at least one film pre-scanning section is projected onto a scanning element (18) used for carrying out the pre-scanning, whereby data of the film scanning section is detected by the scanning element (18). To this end, at least one characteristic quantity which is relevant to a subsequent principal scanning is ascertained from the detected data. During a principal scanning, at least one film principal scanning section is projected onto the scanning element (18), which was already used during the pre-scanning, while taking the at least one characteristic quantity into account. During pre-scanning, the film (12) is gradually advanced independent of the position of the frames and is scanned when at rest. During the pre-scanning, positioning data permanently assigned to the frames is detected for the principal scanning.

Description

Method and apparatus for detecting a digital photographic original

The invention relates to a method for digitally detecting a photographic original, particularly, a method according to the preamble of claim 1 and a corresponding apparatus according to the preamble of claim twentieth

Such a generic method and a generic device such are known from the document DE 198 05 048 A1. In this document a method and an apparatus for detecting digital photographic films are described which comprise a plurality of frames. A film is then first sampled at a first resolution in a pre-scan. the positions of the individual images on the film and other parameters for a subsequent main scan, at a second higher resolution be subsequently determined from the acquired samples. This main scanning is performed in a phase in which the respective scanned frame is in rest position.

For the pre-scan with the lower resolution a so-called Vorabtasteinrichtung is used. While the film at relatively high speed transported through the Vorabtasteinrichtung, three each arranged perpendicular to the direction of movement of the film line of the film are projected on the three sensor rows Vorabtasteinrichtung. The sensor lines are each covered with a color filter to obtain extracts of the film in the colors red, green and blue. In this way, film-specific data can be acquired in addition to the image positions. Alternatively, however, it is also possible, in each case arranged perpendicular to the moving direction of the film line of the film over a color splitter in a red, green, and blue line split and then to project this to the three sensor rows. Consequently, each cellular section of the film is in each case imaged simultaneously on the three sensor rows.

The samples detected flow to a computing unit, in which the positions of the individual images, and other film-specific parameters are determined from the color separations of the whole film. For the main scan with the higher resolution, the film is positioned by a positioning unit in each case, that in each case a single image in the imaging beam path of a main scanning means is located. This main scanning means, for example, has an area CCD array, in which each frame of film is scanned in the rest position. For this purpose, the area CCD-array must have a size that ensures that the entire frame is detected. The figure can be done either directly or through a lens. The light of these main scan is dyeable by a corresponding filter unit and the exposure can be carried out sequentially in the three colors red, green and blue. When the exposure for the main scan also the parameters determined in the pre-scanning will be considered.

A disadvantage of the apparatus and the method, however, is that two Abtastein- directions must be used to make the two samples with different resolutions. Already due to the necessary circuits, it is not possible to arrange the three sensor lines for the pre-scan and the area CCD array for the main scan directly next to each other. As a result, for example, two lighting units for the preliminary and the main scanning must be used. In addition, two electronic systems for evaluating and controlling of the area CCD-array or the three sensor lines are necessary.

are also a device from the document US 5,157,482, and a procedural ren known for detecting digital photographic films. Also in the process described therein, a pre-scan and a main scan are performed. The pre-scan is also used to determine the image positions on a photographic film, in particular, in addition to the used therefor marking notches on the film. It is, however, sets This was preceded in that at least one of these marking notches is present on the film, without which the image positions can not be determined in this method. In the prescan also other parameters can be determined, which are utilized in the main scan. sections effecting both the pre-scan and the main scan, wherein the respectively scanned portion is in rest position. For the pre-scan and the main scan one and the same scanning can be used. In order to obtain the high-resolution scanning digital low-resolution images, the light incident on the individual pixels of the scanning radiation per pixel is first recorded and digitized. Subsequently, the resolution is reduced within the computing unit by spatial integration of the digital image data. In the case of the scanning element used for both the pre-scan as well as for the main scan, a disadvantage of the described apparatus and the method described that the pre-scanning is extremely time consuming, since the scanned film portions are respectively positioned for pre-scanning on the image positions and subsequently scanned in the rest position have what takes a long time, especially since the pre-scan is first high definition. Furthermore, this method is not suitable for notch-free films.

Accordingly, it is an object of the invention to further develop a method and an apparatus of the type mentioned such that the electronic capture of a document, only a small number as possible must be used to apparatus elements and at the same time a rapid pre-scan is made possible.

The object is achieved by a method having the characterizing features of claim 1 and a device having the characterizing features of claim twentieth

This object is inventively achieved in that in the pre-scanning the original - independently of the image positions - a Vorlagenvorabtastabschnitt after another is projected onto the sensing element so that all the image data is acquired, but in addition also contained positioning data of the original are detected, the image positions of the are permanently assigned. This positioning data, after the frame positions are determined from the pre-scan, used to position the template in main scanning on the image positions by being sampled again in the main scanning.

The template is initially scheduled for the pre-scan in Vorlagevorabtastabschnitte, which can then be scanned sequentially or simultaneously. Under a Vorlagevorabtastabschnitt is to be understood, for example, a template line that is arranged perpendicular to a moving direction of a document within the inventive device. but it may be cropping, all images, or any portions of the template to this community.

In pre-scanning, inter alia, portions of a template are determined to be subjected to the subsequent main scan. These sections are referred to as Vorlagehauptabtastabschnitte. Such Vorlagehauptabtastabschnitt example, can represent a single image on a template. In contrast to the process described in US 5,157,482 apparatus and the method described therein which can Vorlagehauptab- sensing portions in the prescan here without marking aids on the template are determined. The individual statements, which were obtained when scanning the Vorlagenvorabtastabschnitte must then again, reproducing the entire document into one, big picture are summarized. It is important that the individual separations are precisely positioned to each other so that the corresponding edges of the Vorlagenvorabtastabschnitte edges fit together exactly, so that no image information is lost, but also no double received. For this purpose, is a requirement that the template between the projection steps carefully be transported and accurately aligned on the scanning device.

It may also be advantageous to the template lagenvorabtastabschnitt each by less than the pre- further transport. Characterized an edge portion of each Vorlagenvorabtastabschnittes is scanned twice, and when Reassemble the individual extracts arise in Gesamtvorabtastbild respective overlap regions. The overlap areas are determined by a computing unit and taken into account in the composition of the single extracts, for the overall image and corrected. This one too precise orientation of the original is no longer necessary to offset the slight Vorlagenvorabtastabschnitte each other after or during transport can be accepted.

The summary of an overall image can be the entire document or only a portion comprise the same. Just to summarize some of the template is then particularly advantageous if the first parameters for the main scan to be determined already during the pre-scan in order to accelerate the process.

From the overall image data can be found by identifying density jumps image webs. These provide information about the positions of the individual images. The frame positions are then correlated with the determined parallel positioning data.

During the subsequent main scanning, positioning information is again ER- construed so that the basis of this, the individual images can be assigned to the sensing element as Template hauptabtastabschnitte.

Additionally, it is advantageous to determine as a parameter for the main scan from the data pre-scanning, the density range of the original. Thus, the sensitivity of the sensing element can be adjusted accordingly in the main scanning.

Further, it is advantageous to derive important information for the image processing from the data pre-scanning. These include,. B. color tint of the original and underexposure.

The in sampling with positioning data to be detected can be particularly advantageously detected by a designated part of the scanning element with. This is especially recommended if the scanning is large enough so that the edges of the template can be mapped to this.

To be used as positioning data, the edge information of the original, even though the sensing element can detect only the image data, so a separate sensing element must be provided. This can be arranged on the stage for the original, for example formed as small sensor line with its own lighting. but it can be mitbeleuchtet with the radiation source for the original scanning. Another advantageous possibility is to arrange the additional scanning in the image plane of the original at the sensing element (18). It must be ensured that upon illumination of the further sensing element is no stray light on the sensing element (18) falls. can roaten the detection of the position i ^ take place during the pre-scan template or during transport of the template between the scanning steps.

If sufficient computing and storage capacity is present, it is advantageous to determine the positioning data from the image data of the template either directly or data derived therefrom. For this, a density or intensity profile of the template can be recorded during the pre-scan, which is then followed again in the main scanning.

Very costly to store individual picture lines themselves and compare them with scanned again in the main-scanning. This can be advantageous, if only the scanning element (18) is available and can capture that no border areas.

In an advantageous embodiment, a line density (z. B. CCD-line) can be provided, which scans the density profile of the template. For this, the positions of the individual images can be based on the detected density jumps on the one hand be determined, on the other hand, the density profile z. B. an original line are used for positioning of the original in the main scanning.

In a further advantageous embodiment, the edge information of the original are used as the positioning data. For this purpose, the perforations of the photographic original or the DX code are.

A further advantageous development of the invention provides that the magnification of the document on the scanning imaging optical system can be selected such that not only the individual images of the original imaged on the scanning, but also any existing characteristic edge information - as with film originals, the perforation edges and DX code - are to be projected. These data are easy to analyze and allow easy positioning in the main scanning and a very simple identification of the overlap regions of the Vorabtastabschnitte and thus a little complicated assembling the scanned document portions to a total image.

Another particularly advantageous embodiment of the invention provides that the submission to the pre-scan at rest and projectable between the scanning steps can be moved. During prescan, it is necessary to combine sensor elements to macro sensor elements to achieve today's usual fast speeds during pre-scan templates. This can for example be implemented in that the charges of individual pixels are preferably summed before A / D conversion.

It is particularly advantageous to sum the charges on the sensor element (CCD) itself during the readout process is. This can be done on a CCD sensor by the charges of several sensor lines are shifted to the readout line before it is read out pixel by pixel. The reading out pixel by pixel of this line is then only after the charge of a specified number of sensor lines have been summed up there.

In contrast to the process described in US 5,157,482 scanning method, however, it is not necessary in the inventive pre-scanning to position the template so that exactly one image of the original is imaged on the sensing element. There is no sensor required are identified by the required for image positioning mark notches in the film. Accordingly, also notch-free films or templates that go in their expansion over the surface of the sensing element, to process. According to the invention the template is independent of the image positions relatively positionable for sensing that a respective Vorlagenabtastabschnitt this template in the rest position is successively or simultaneously projected in at least three colors, irrespective of whether a picture, a part of an image, a film web, two images or any portion of the template in the beam path are located. sampling sections between the projections of the submission of an original by a maximum extension of the straight projizier- th Vorlagenvorabtastabschnittes is transported further, so that the next waste cut is projected. In this way, the original is scanned progressively by a Vorlagenabtastabschnitt after another is projected to the scanning unit and scanned.

An apparatus for carrying out the method according to the invention comprises a radiation source for illuminating the original, a scanning element for scanning the document, a computer unit for processing the data detected during the scanning, and a further scanning unit for scanning data that is useful for positioning the template when the main scan are on.

The additional sensing element can be a defined portion of the scanning unit (18). It may be formed for example as a line density area CCD or comprise the edges of the CCD.

However, since it is useful to use the sensing element (18) completely for the scanning of the image data to accommodate these high resolution as possible, it is particularly advantageous to provide a separate, additional Abtasteiement.

This can be designed as a sensor row to the platen and scanning means of the illumination of the radiation source or a separate lighting the document or parts thereof. It is advantageous that the sensor line does not affect the advantages and main scanning.

The additional sensing element can also be arranged in the image plane of the original near the sensing element (18), it must be constructed so that no stray light is incident on the scanning member during scanning of the positioning data. Although this light foreclosure is not easy, this solution is advantageous in that positioning data and image data are displayed on the same optics and lighting.

An advantageous embodiment further sensing provides that allow the perforation or the DX code of the original is scanned. This sampling is very simple and can be done with little effort.

In a further advantageous embodiment, the image data of the template itself or its intensity or density curve can be scanned with the other sensing element. is advantageous because these data are derived from the image data itself, but in this case large amounts of data need to be processed.

On a computer unit the positions of the frames of the template can be determined from the pre-scan. This image positions are then correlated with the positioning data, and the correlations can be stored in a memory unit. Thus, the image positions are clearly assigned to the positioning data, the images can be positioned on the positioning data. The arithmetic and memory unit is connected to the transport unit for the template, so that the transport of the template can be carried out according to the positioning data.

During transport the document is also scanned by means of the other sensing element, so that can be done precisely to the position of the individual images for the main scan of the transport.

A further advantageous embodiment provides that in the pre-scan a part of the sensor elements is grouped such that at least two sensor elements are assigned to a macro sensor element and impinging on the macro sensor elements radiation per macro sensor element can be detected. Especially advantageous ιat proved, for the pre-scanning the same scanning to verwendf-.n as for the main scan. It is ideal for increasing the scanning speed, when a portion of the sensor elements of the sensing member is summarized in the pre-scan to macro sensor elements and a reduction in resolution is achieved in this manner. In that only one sample is used for both samples, the equipment configuration of the apparatus for digitally detecting an original is enormously simplified. It is now only an electronic system for evaluating and for controlling the scanning element necessary. In addition, a radiation source for both samples can be used. A very great advantage is also that the dynamics of the sensing member is increased by the combination of the sensor elements, wherein the factor of the dynamics of increase is equal to the square root of the number of the combined sensor elements. This means that the pre-scan can be carried out even with short exposure times, or even at a low exposure intensity, and has a low sensitivity to noise. Due to the summary of the sensor elements to macro sensor elements, the pre-scan can be extremely quick.

In a further very advantageous development of the invention, the sensor elements macro macro sensing portions may be associated with, in each case one Vorlagenvorabtastabschnitt may be projected onto at least three macro sensor sections sequentially or simultaneously. This is particularly advantageous if the respective Vorlagevorabtastabschnitt respect to at least three different criteria is to be examined.

A further advantageous development of the invention provides that the respective Vorlagenvorabtastabschnitt is projected on at least a sensor portion, having the sensor elements, which is detectable to the sensor elements per impinging radiation sensor element. In this way, information on each one Vorlagevorabtastabschnitt can be obtained, requiring higher resolution

Such a sensor section may be a density sensor portion through which Hel of the respective one Vorlagenvorabtastabschnitts ligkeitswerte detectable are, particularly if the exact boundaries of individual images on a film are to be determined, a high resolution in the detection of the brightness values ​​of the respective one Vorlagenvorabtastabschnittes necessary

Advantageously, the apparatus may comprise a beam splitter through which the respective Vorlagenvorabtastabschnitt can be projected simultaneously on the macro-sensor sections and / or the sensor portion In this manner, the information is determined to a Vorlagenvorabtastabschnitt in a single projection phase

One of the macro sensor sections may be a density macro sensor section can be detected by the Helhgkeitswerte of the respective one Vorlagenvorabtastabschnitts Furthermore, the density macro sensor portion may have at least one macro sensor element which comprises in a Sensorelementanordnungsπchtung corresponding to a transport direction of the original in the pre-scan a larger number of sensor elements than the macro sensor elements the rest of the macro sensor sections in the Sensorelementanordnungsπchtung have, particularly if the remaining macro sensor sections in the Sensorelementanordnungsπchtung have a relatively large number of sensor elements in the macro sensor elements, this development is extremely advantageous, since the image boundaries of the individual images on the document which is perpendicular to the to the transporting direction template lie can be accurately detected in this way

Another particularly advantageous further development of the invention provides that the device comprises a farbaufteilendes element at least by which the can be projected in each case one to three macro Vorlagenvorabtastabschnitt sensor sections in a red separation, a blue and a green extract extract. In this way, three different color separations can be obtained from the respective one Vorlagenvorabtastabschnitt.

A further advantageous development of the invention provides that the three macro sensor portions have a same number of macro sensor elements, which are each composed of an equal number of sensor elements. By each macro sensor element, a measured value can be detected, which can then be associated with a measurement value of a sensor element of a corresponding macro macro other sensor portion. The different color separations each of a Vorlagenvorabtastabschnitts can therefore be detected by measurement values ​​that can be assigned directly to each other.

The at least one farbaufteilende element may include at least three color filters. The at least three color filters can be combined into a strip filter.

Another particularly advantageous further development of the invention provides that the at least one farbaufteilende element comprises a beamsplitter through which the currently projected Vorlagevorabtastabschnitt in a red separation, a blue separation and a green extract is divisible. It is therefore only an exposure of the respective Vorlagenvorabtastabschnitts necessary to obtain three different color separations.

The at least one farbaufteilende element can be supported such that it can be moved into at least one position of use and in a storage position, so that it can be swiveled for the pre-scanning, for example, in the beam path and can easily be removed again before the main scan. A further advantageous development of the invention provides that the sensing element is a CCD chip, a line-transfer CCD chip or a CMOS chip. These types of sensing elements enable fast clocking so that new data can be recorded while previously recorded data can still be read. Thus, the pre-scan can be greatly accelerated in particular.

A further advantageous development of the invention provides that the radiation used for scanning is generated by a radiation source which comprises LEDs. For scanning color documents, it is particularly advantageous that LEDs are provided at least in the three colors red, green and blue. If the scratch correction additional infrared scanning is required, it is advantageous to provide more LEDs that emit light in the infrared range. provide LEDs as illuminating radiation source, is therefore very advantageous, in particular, since LEDs are very quickly switched, so that dead times, which are due to the filter change can be avoided. In addition, LEDs have a very high light output, so that the scanning process is now complete quickly. By means of this multi-color LEDs is illuminated the original for the scanning of each Vorlagenabtastabschnitt respectively in each of the at least three colors simultaneously or sequentially.

An advantageous further development of the invention provides that the template in step (a) is transported in a first direction, while the template in step (c), ie in the main scanning in a second, opposite the first direction can be transported. This is particularly useful when using only one sensing element for the pre-scan and the main scan.

A further advantageous development of the invention provides that in step (a) are each a Vorlagenvorabtastabschnitt is projected sequentially or simultaneously to at least three Makroser.sorabschnitte comprising macro sensor elements.

Projecting the at least one Vorlagenhauptabtastabschnittes in step (c) can be carried out in each case a phase in which the respective projected Template main scanning is in rest position.

The steps (a) and (b) can be performed in parallel in a particularly advantageous manner. In step (b) the relevant parameters are determined for the main scan. A parallel execution of the two steps (a) and (b) has a tremendous time savings in the prescan result.

Further advantages of the invention will become apparent from the hereinafter described embodiments of the invention. A first embodiment will be explained in detail with reference to two figures.

Show it:

Fig. 1 a front view of a schematic configuration of a film scanner according to the invention for the digital recording of a film,

Fig. 2 shows a detail of a plan view of a schematically illustrated Abtasteiement of the film scanner according to the invention and

Fig. 3 shows a schematic section of a film which is scanned progressively,

Fig. 4 a front view of another schematic configuration of a film scanner according to the invention for the digital recording of a movie. Figure 1 shows the schematic structure of the first embodiment of the invention, a film scanner 10 for the digital acquisition of a film with this film scanneMO prescan and main scan can be a film 12 are sequentially performed by a transport unit 14, the film 12 is first to pre-scan in a by an arrow 16 transported direction indicated and for subsequent main scan in an opposite direction zurucktransportiert

During the movement of the film in the direction of arrow 16 through a sensing 18, which is formed in this first embodiment of a line-transfer CCD chip, so the pre-scanning is performed first in each case four arranged perpendicular to the direction of movement of the film 12, cellular portions of the film 12 is projected into a first projection phase at the same time by a light source 20 to a Vorabtastobjektiv 22, which is mounted on and swung a mirror cover 23, and a mirror shaft 25 serve the radiation emitted by the light source 20 all together, on the film 12 to focus - Sieren in the beam path is also disposed on and swing-out of three color filters of existing stripe filter 24 so that three of the projected portions of the film 12 are formed as red separation as blue separation and as Grunauszug off the three color separations are printed on by the Vorabtastobjektiv 22 directed a portion of the sensing element 18

Figure 2 shows a schematically represented of the scanning element 18 with three of macro sensor elements 26 formed macro sensor sections 28 through which the three color separations of the three projected template portions are recognized Alternatively, the macro sensor sections could in the direction corresponding to the direction of transport of the document 28, even more than a macro sensor element having This alternative, however, is not shown in Figure 2 each represents a macro sensor element 26 is elements of 40x40, not shown in the Figure 2 sensor formed the fourth projected portion is directed through the Vorabtastobjektiv 22 to a density of macro-sensor section 30 of the scanning 18th This density macro sensor section 30 has four times as many macro sensor elements 32 on how the macro sensor sections 28 above the same time the macro sensor elements 32 are formed here in each of 20x20 sensor elements so that the number of sensor elements per density macro sensor section 30 of the number of sensor elements per macro sensor section 28 corresponds. Overall, the scanning has 18 1024x2048 sensor elements. Only a portion is used for pre-scan and combined into macro sensor elements.

the radiation which impinges on a macro up sensor element 26 or 32 is respectively detected. While be recovered by the separations information on the color densities of each projected cellular portions of the film, 30 brightness values ​​of the projected film portion thereon are detected by the density sensor macro section. While the film 12 is continuously moved by the transport unit 14, the brightness values ​​are detected by the density sensor section macro 30th In a projection phase of the film portion is in the rest position on the macro-sensor sections 26 - projected 28th One by one red, one green and one blue extract are added. Thereafter, the film is further transported under scanning the density until the subsequent film portion is projected to the color macro sensor sections.

The sensing element 18 is also connected to a in Fig. Calculator 34 schematically illustrated in Figure 1 of the entire data to be transmitted. Using the data, the positions of the individual images on the film 12 and other film-related parameters are determined. Further, a density profile which is correlated with the image positions and stored is formed from the density values. After completion of the pre-scanning, the calculation unit can control the transport unit 14 so 34 that the film 12, which is now transported counter to the direction of the arrow 16, is in each case stopped when a still image in the imaging beam path of the film scanner 10 is located. The position of the individual image is determined by again the density profile of the original is recorded by the macro density sensor portion during return transport. This profile is compared with the stored, correlated with the image positions density profile, so that the individual images can be found.

A further shown in Fig. 4 scanning device has an additional sensing element 48, which consists of a row of diodes and is illuminated by a separate radiation source 40. Thus, perforation and DX code of the film 12 are sensed so that they may be used as positioning data corresponding to the density profile.

In the thus introduced main scanning is in each case a section of the film 12 - namely, each one frame - projected onto the entire surface of the sensor sensing the eighteenth By scanning 18 impinging on the individual, not shown, of sensor elements per sensor radiation element is now detected. Above the mirror shaft 25, a filter unit 38 is arranged so that for each frame of different color separations, particularly in the colors red, green and blue, can be accommodated. To this end, single-in and swing filter of the filter unit are placed in the beam path 38th By three successive exposures through different filters to the three corresponding color separations can be mapped to the sensing 18th The obtained data are read out from the sensing element 18 in the arithmetic unit 34th The image data are modified by the film-related parameters that were determined during the pre-scan, to eliminate for example, special film-specific color casts.

In a second, not shown embodiment of the invention, in the

Prescan respectively projected a first cell shaped portion of the film to a color beam splitter through which the film portion can be divided in a red, green, and blue line. These lines are then projected onto three macro sensor portions of a sensing element, which may be a CMOS chip in this second embodiment. A two he line-shaped portion of the film is simultaneously projected onto a density sensor portion of the sensing element, wherein the density sensor portion has sensor elements, through which the incident radiation is detected lung per sensor element. In a subsequent projection phase two adjacent line-shaped portions of the film are projected on the three macro sensor portions and the density sensor section. This process is repeated until the entire film has been subjected to the pre-scanning.

In a third embodiment of the invention a pivotally mounted beam splitter is used to project respectively a line-shaped portion of the film simultaneously with three color filters also pivotable covered macro sensor sections and a density macro sensor section. In this third embodiment, all the data of a section of the film thus be detected the same time, while the data is collected into a film in at least two phases projection in the above described embodiments.

In a further, not illustrated embodiment of the invention, the light source 20, the mirror cover 23, the mirror shaft 25 and the strip of filter 24 be replaced by a LED lamp house. LEDs enable short exposure times and dead times to avoid that always arise through a filter change.

The LED lamp house can be particularly used to particular advantage in a further embodiment of the invention. the pre-scan of the film is approximately, for example in this execution sections made, each section is taken up while the film is in rest position. The film is thus after sampling a portion of each to the extent of the currently scanned portion further transported so that the next section is scanned. In each scanning of an original portion is respectively a red, a blue and a green extract receivable characterized in that the template portion in each of these colors can be illuminated. This method will be explained with reference to FIG. 3. has in the film 12, the sprocket holes 29, and a DX code 30, out shelves 31 are obtained by the Vorlagenvorabtastabschnitte are respectively imaged onto the CCD chip, the next and the previous Vorlagenabtastabschnitt always be arranged so that an overlapping region 32 of the Single extracts obtained. A computing unit, these individual extracts finally composes a pre-scan image of the entire film. when assembling for exact alignment of the individual extracts uses information from the overlapping area. Advantageously, the sampled perforations 29 or the DX code 30 which are identical in each case at the edge of the individual extracts, made to coincide. Also, image contents can be assigned to each correlation method.

This thus obtained low-resolution pre-scan of the entire film contains all the necessary color and density information as well as DX code and perforation. Furthermore, it is now possible based on the detection of density edge to recognize the image webs so that the image positions clearly identified and the images can be accurately positioned at the main scan.

The characteristics of the different described embodiments of the invention are interchangeable.

For this purpose, 3 sheets drawings

Claims

claims
1. A method for detecting a digital photographic original (12) having a plurality of individual images comprising the steps of:
a) in a pre-scan projecting at least one Vorlagenvorabtastabschnitts on a material used in the pre-scan sensing element (18), wherein (by means of the sensing member 18) data of the advantages are lagenabtastabschnitts detected, b) determining at least one relevant for a subsequent main scan parameter detected from the data, and c) in a main scan projecting at least one scanning element Vorlagenhaupt- scanning section on the already used in the prescan waste (18) taking into account at least one characteristic variable,
characterized in that the template (12) is moved step by step in the pre-scan irrespective of the position of the individual images and scanned in the rest position, and that during the pre-scan the
Frames dedicated positioning data are collected for the main scan.
2. The method according to claim 1, characterized in that individual extracts, resulting from the scanning of the Voriagenabtastabschnitte to a
Gesamtvorabtastbild be combined.
3. The method according to claim 2, characterized in that the Gesamtvorabtastbild includes data of the entire photographic original (12).
4. The method according to claim 2, characterized in that the Gesamtvorabtastbild comprises data of a part of the entire photographic original (12).
5. The method according to any one of claims 2, 3 or 4, characterized in that the position of the individual images is determined from the data of the Gesamtvorabtastbildes as a parameter.
6. The method according to claim 5, characterized in that in the main the Hauptabtastabschnitte according to the position of the scan frames can be selected.
7. The method according to any one of claims 2, 3 or 4, characterized in that from the data of Gesamtabtastbildes as a characteristic of the density scope of the photographic original (12) is determined.
8. The method according to claim 7, characterized in that in the main scanning driving of the scanning element (18) takes account of the density range.
9. The method according to claim 1, characterized in that the positioning data with a defined part of the sensing element are detected (18).
10. Apparatus according to claim 1, characterized in that the match positioning data with a separate sensing element (18) are detected.
11. The method according to claim 1, characterized in that the positioning data comprise the edge information of the original.
12. The method according to claim 11, characterized in that the positioning data comprises the perforation of the template.
13. The method according to claim 11, characterized in that the positioning data comprise the DX code of the template.
14. The method according to claim 1, characterized in that the positioning data comprise image data of the template.
15. The method according to claim 1, characterized in that the positioning data include the density profile of the image data of the original.
16. The method according to claim 9, characterized in that the positions of the individual images are assigned to the positioning data acquired.
17. The method according to claim 16, characterized in that the main sampling sections are positioned for the main scan by means of the positioning data.
18. The method according to any one of the preceding claims, characterized in that in the pre-scan a part of the sensor elements of the exhaust probe element (18) is combined such that at least two sensor elements a macro sensor element are assigned (26, 32), on the macro sensor elements (26, 32) incident radiation per macro sensor element (26, 32) is detected.
19. The method according to claim 18, characterized in that in the pre-scanning the original with three colors is sequentially illuminated.
(20) 20. A device for detecting a digital photographic original (12) having a plurality of frames, said apparatus (10) le a source of radiation, by which radiation at least one prescanning
Vorlagenvorabtastabschnitt, during a subsequent main scan, at least one Vorlagenhauptabtastabschnitt, on a sensing (18) is projected for recording data, and a computing unit, is determined by the at least one relevant to the main scanning characteristic quantity from the acquired in the prescan data, characterized in that another sensing element (48) is provided, positioning data for the positioning of the individual images are detected in the main scan by the pre-scanning in.
21. The apparatus according to claim 20, characterized in that the further sensing element (48) to the sensing element (18) for data acquisition, a
forming unit.
22. Device according to claim 20, characterized gekennzeichent that the further sensing element (48) is arranged on the stage for the template so that the template or a portion thereof is directly scanned.
23. The device according to claim 20, characterized in that the further sensing element (48), wherein the sensing element (18) for data acquisition arranged so that the scanning of the position data via the same optical system as the data sampling is performed.
24. Device according to one of claims 20 to 24, characterized in that the further sensing element (48) is constructed and arranged so that the perforation of the photographic original is detected.
25. Device according to one of claims 20 to 24, characterized in that the further sensing element (48) is constructed and arranged so that the DX code of the photographic original is detected.
26. The device according to one of claims 20 to 24, characterized in that the further sensing element (48) is constructed and arranged so that data of the original (12) are detectable.
27. Apparatus according to claim 26, characterized in that the Intensitätsverlaut the data of the original (12) can be detected.
28. Device according to one of the preceding claims, characterized in that the arithmetic unit is constructed so that a plurality of individual images comprising data of a template (12) so that storage and are editable.
29. The device according to claim 28, characterized in that the arithmetic unit is constructed so that the positions of the individual images are determined
30. The device according to claim 29, characterized in that the arithmetic unit is constructed so that the positions of the individual images recorded by the further sensing element (48) positioning data can be assigned.
31. The device according to claim 26, characterized in that the further sensing element (48) is connected to the computing unit.
32. Apparatus according to claim 31, characterized in that the further sensing element (48) is constructed and arranged so that the positioning data are again detected in the main scan.
33. Apparatus according to claim 32, characterized in that the transport unit for the template (12) with the further sensing element (48) and the computing unit is connected so that the thus correlated image positions are positioned at the main scan based on the detected positioning data.
34. Device according to one of the preceding claims, characterized in that in the pre-scan a part of the sensor elements of the sensing member (18) is summarized in such a way that in each case two sensor elements a macro sensor element are assigned (26, 32) and (on the macro-sensor elements 26, 32) macro incident radiation per sensor element (26, 32) can be detected.
35. Device according to one of the preceding claims, characterized in that the radiation source (20) of the device comprises three-color LEDs.
PCT/EP2001/001131 2000-02-03 2001-02-02 Method and device for digitally detecting a photographic film WO2001058139A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10004630.4 2000-02-03
DE2000104630 DE10004630C1 (en) 2000-02-03 2000-02-03 Digital scanner for photographic film has sensor elements of scanning element combined in pre-scanning mode for providing macro sensor elements

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4656524A (en) * 1985-12-23 1987-04-07 Polaroid Corporation Electronic imaging copier
US4727399A (en) * 1984-11-01 1988-02-23 Fuji Photo Film Co., Ltd. Photographic printer and method for detecting and positioning frames
US4736251A (en) * 1982-12-15 1988-04-05 Ikegami Tsushinki Co. Ltd. Color image pickup apparatus having one or more line sensors and a mechanical sub-scanning device
EP0668531A1 (en) * 1994-02-16 1995-08-23 Eastman Kodak Company Film positioning method and apparatus
US5625470A (en) * 1992-12-11 1997-04-29 Nikon Corporation Color image scanner having multiple LEDS and color image scanning method thereof
US5652663A (en) * 1994-07-29 1997-07-29 Polaroid Corporation Preview buffer for electronic scanner
EP0794454A2 (en) * 1996-03-04 1997-09-10 Fuji Photo Film Co., Ltd. Film scanner
US5684601A (en) * 1992-12-09 1997-11-04 Fuji Photo Film Co., Ltd. Image reading apparatus which varies a number of reading operations according to image density
US5726773A (en) * 1994-11-29 1998-03-10 Carl-Zeiss-Stiftung Apparatus for scanning and digitizing photographic image objects and method of operating said apparatus
US5870173A (en) * 1996-08-13 1999-02-09 Agfa-Gevaert Ag Processing apparatus for film

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157482A (en) * 1990-09-17 1992-10-20 Eastman Kodak Company Use of pre-scanned low resolution imagery data for synchronizing application of respective scene balance mapping mechanisms during high resolution rescan of successive images frames on a continuous film strip
JP3453506B2 (en) * 1998-01-27 2003-10-06 富士写真フイルム株式会社 Image reading apparatus
DE19805048C2 (en) * 1998-02-09 2000-05-18 Agfa Gevaert Ag Method and apparatus for detecting digital photographic films

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736251A (en) * 1982-12-15 1988-04-05 Ikegami Tsushinki Co. Ltd. Color image pickup apparatus having one or more line sensors and a mechanical sub-scanning device
US4727399A (en) * 1984-11-01 1988-02-23 Fuji Photo Film Co., Ltd. Photographic printer and method for detecting and positioning frames
US4656524A (en) * 1985-12-23 1987-04-07 Polaroid Corporation Electronic imaging copier
US5684601A (en) * 1992-12-09 1997-11-04 Fuji Photo Film Co., Ltd. Image reading apparatus which varies a number of reading operations according to image density
US5625470A (en) * 1992-12-11 1997-04-29 Nikon Corporation Color image scanner having multiple LEDS and color image scanning method thereof
EP0668531A1 (en) * 1994-02-16 1995-08-23 Eastman Kodak Company Film positioning method and apparatus
US5652663A (en) * 1994-07-29 1997-07-29 Polaroid Corporation Preview buffer for electronic scanner
US5726773A (en) * 1994-11-29 1998-03-10 Carl-Zeiss-Stiftung Apparatus for scanning and digitizing photographic image objects and method of operating said apparatus
EP0794454A2 (en) * 1996-03-04 1997-09-10 Fuji Photo Film Co., Ltd. Film scanner
US5870173A (en) * 1996-08-13 1999-02-09 Agfa-Gevaert Ag Processing apparatus for film

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