JP3158570B2 - Film player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film player, and more particularly, to a film player including a linear imaging device.

[0002]

2. Description of the Related Art At present, a film player for reproducing an image of a developed film on a TV or the like has been proposed. As an image sensor used in these devices, either an area sensor or a line sensor is mainly used.

[0003] In the conventional apparatus, the area sensor has the advantage that the time for reading the film image is short, but there is a problem that the sensor itself is expensive. On the other hand, although the line sensor is inexpensive, it has a problem that it takes time to scan for reading a film image. It costs more. As described above, conventionally, the case of using the area sensor and the case of using the line sensor have advantages and disadvantages, and it cannot be said that either is advantageous.

An object of the present invention is to provide a film player that can overcome the above-mentioned conventional problems as much as possible, and in particular, to obtain a film player that can be configured at low cost. .

[0005]

According to the present invention, there is provided a film player for reproducing an image recorded on a developed film, comprising: an image pickup device for converting an image recorded on the film into an electric signal; Detecting means for detecting format information for each frame, and control means for controlling switching of a sampling interval of an image sensor corresponding to each frame based on a detection result from the detecting means.

[0006]

In the film player according to the present invention, the image is read out using the image sensor, and the sampling interval of the image signal can be changed depending on the format of each frame, so that the memory capacity can be reduced.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a main part of a film player according to the present invention.

Referring to FIG. 1, an image on film 21 is read by line CCD 1, and C.I. D. S. (Corel
2 is correlated double-sampled. The microcomputer 16 determines the horizontal position and vertical position of the film 21 at the time of photographing, and also determines whether the image is a normal or panoramic image, and thins out the data of the line CCD 1 by the thinning circuit 3 according to the photographing state.

The driver 14 is driven by a pulse from the timing generator 13, and after all the data of the line CCD 1 is read out, the film 21 moves.
The next part is read. Also in this case, the moving amount of the film changes according to the shooting state. The thinning circuit 3 thins out not only pixels of the line CCD 1 but also lines.

The thinned data passes through a white balance (WB) circuit, a gamma correction circuit, and a matrix circuit 4, and
(Luminance signal) and C (color difference signal).

The Y and C signals are A / D converted by A / D conversion circuits 5 and 6, respectively, and then the data is compressed by compression ICs 7 and 8 and read into semiconductor memory 9. The compression method is a still image compression method such as predictive coding, orthogonal transform, or Huffman coding.

The effect IC 12 is a circuit for transferring an arbitrary part of the semiconductor memory 9 to the VRAM 10. By moving an arbitrary part, panning, tilting, and electronic zoom can be performed.

The VRAM 10 is a memory that corresponds to the TV in a 1: 1 relationship. The video written in the VRAM 10 is sent to the encoder 11 on a field-by-field basis (1/60 sec), and the signal of the synchronizing signal generation circuit (SSG) 18 After being combined by the encoder 11, it is DA-converted by the DA conversion circuit 19 and becomes an NTSC signal, which is sent to the TV.

The operation switch 15 is a switch for knowing the state of the operation part of the apparatus, and the mechanical switch 17 is used to indicate the state of the mechanism of the apparatus, for example, the position of the film 21 or the position of the line CCD 1 when moving. It is a switch to know.

The magnetic reading unit (MH) 20 includes a film 21
A magnetic head that reads magnetic information recorded in the film 21, detects the format of the film 21 based on the magnetic information read from the film 21, and outputs the content to the microcomputer 16.

The film 21 is fed by a film feeding unit 22, and its speed is controlled by a film feeding speed control unit 23. As a result, a desired image is taken in accordance with the format of the film.

Next, the structure of the image reading portion of the film 21 by the line CCD 1 will be described with reference to FIG.

The line CCD 1 is fixed on a base 33, and the film 21 is driven by a winding mechanism 31, and an image on the film 21 is read by passing under the line CCD 1.

The feed mechanism 32 applies tension in the direction opposite to the winding so that the film 21 is not bent.

The line CCD 1 is, as shown in FIG.
Each of R, G, and B pixels has, for example, 5600 pixels. Therefore, the total number of pixels is 16800 (5600 × 3).
In this embodiment, the longitudinal direction of the film 21 is defined as a main scanning direction, and the direction in which the line CCD 1 and the film 21 move relatively is defined as a sub-scanning direction. In the following embodiments, R, G, B
Each pixel is collectively represented as P.

FIG. 4 shows the relationship between the configuration of the memory VRAM 10 for outputting the image on the film 21 to the television and the number of scanning lines and the horizontal resolution when the image is output to the television. In this embodiment, the image quality output to the television is set to 480 scanning lines and 400 horizontal resolutions.

In FIG. 1, the VRAM 10 and the television correspond one to one, and the vertical direction of the VRAM 10 is 48.
0 and the horizontal direction correspond to 400. Hereinafter, based on this value, the number of pixels of the line sensor and the number of readings S in the sub-scanning direction are set.

FIG. 5 shows a scanning method in the case of the normal format horizontal position. The ABCD in the figure indicates the film 21, and the hatched portion indicates the portion output to the VRAM 10 and reproduced on the television. By moving the shaded portion in a state where the shaded portion is output (magnified state), panning and tilting can be performed (depending on which portion is output to the VRAM 10).
Now, assuming that the enlargement ratio is 1.4 times and the image enlarged by 1.4 times corresponds to the above image quality, the vertical direction (between AC) of the film is 480P × 1.4 ≒ 700P pixels. Need to store in numbers. P attached to the numeral indicates one set of R, G, and B as described above, and the actual number of pixels is 70.
It is 0x3. Similarly, 400S × in the horizontal direction (between AB)
It is necessary to read 1.4 = 560S with the number of readings. In addition,
S attached to the numeral indicates the number of readings (the number of steps).

FIG. 2B shows an image pickup area at a unit time t, and the whole film is picked up in 560 steps.

FIG. 6 is a diagram showing a scanning method in the case of a panorama format horizontal position. As in the case of FIG. 5, AB
The CD indicates the film 21, and the hatched portion indicates a portion to be reproduced on the television. The ratio of the vertical length of the film to the vertical length of the portion where the image is displayed (BD: EF) is 1.7: 1.

Assuming that the image in the shaded area corresponds to the above image quality, the vertical direction of the film 21 (A
(Between C and C) must be stored with the number of pixels of 480P × 1.7 ≒ 800P. The actual number of pixels is 800 × 3. Similarly, it is necessary to read in the horizontal direction (between AB) with the reading number of 400S × 1.7 ≒ 700S.

FIG. 3B shows an image pickup area at a unit time t. The whole film 21 is imaged in 700 steps. In this case, the width of imaging in the unit time t is 560/700 on the basis of the horizontal position of the normal format. Thus, the speed control unit 23 controls the speed of feeding the film.

FIG. 7 is a diagram showing a scanning method in the case of the normal format vertical position. In this case, the vertical direction (between ACs) of the film 21 is horizontal on the television screen.
Memory is performed with the number of pixels of 0P. Next, the number of readings between AB is obtained. Generally, the aspect ratio of a film is 24 mm: 36.
mm = 2: 3, and the aspect ratio of the television is 3: 4.
Therefore, in the case of the vertical position from both aspect ratios, bd:
AB = 1: 2, the number of readings is 480S × 2 = 960S
Becomes

FIG. 3B shows an image pickup area at a unit time t, and the entire film 21 is picked up in 960 steps. In this case, the width of imaging in the unit time t is 560/960 on the basis of the normal format horizontal position.
Thus, the speed control unit 23 controls the speed of feeding the film.

FIG. 8 is a diagram showing a scanning method in the case of a panorama format horizontal position. ABC as in the case of FIG.
D indicates an area of one frame of the film 21, and a hatched portion indicates a portion to be reproduced on a television. The ratio of the vertical length of the film to the vertical length of the portion where the image is displayed (BD: EF) is 1.7: 1. Assuming that the image in the shaded area corresponds to the above image quality, it is necessary to store the vertical direction (between AC) of the film with the number of pixels of 400P × 1.7 ≒ 700P. The reason for multiplying 400P by 1.7 is the same as in the case of the vertical position in the normal format. The actual number of pixels is 700 × 3. Similarly, it is necessary to read in the horizontal direction (between AB) with a reading number of 480S × 1.7 × 2 ≒ 1650S.

FIG. 3B shows an image pickup area at a unit time t. One whole frame of the film 21 is imaged in 1650 steps. In this case, the width of imaging in the unit time t is 560/16 with respect to the normal format horizontal position.
50. Thus, the speed control unit 23 controls the speed of feeding the film.

FIG. 9 is a diagram showing a range of the number of pixels and the number of readings of the line CCD 1 based on the number of pixels and the number of readings of the line sensor based on the number of pixels and the number of readings to be taken into the memory in each format. . The required number of pixels of the line CCD 1 is 700, 800, 400, 7 for each format.
The least common multiple of 00 is 5600. Therefore, 5600
An image is taken with the number of pixels (the actual number of pixels is 5600 × 3).
In this case, the data sampled by the line CCD 1 is as follows.

(1) In the case of the normal format horizontal position,
Only one of the eight data is sent to the memory, and the seven data are thinned by the thinning circuit 3.

(2) In the case of the horizontal position of the panorama format, only one of the seven data is sent to the memory, and the six data are thinned out by the thinning circuit 3.

(3) In the case of the normal format vertical position,
Only one of the fourteen data is sent to the memory, and the thirteen data is thinned by the thinning circuit 3.

(4) In the case of the vertical position in the panorama format, only one of the eight data is sent to the memory, and the seven data are thinned out by the thinning circuit 3.

The number of readings in the horizontal direction of the film is 560 to 165.
0, which controls the film feeding speed so that the number of readings changes according to each format. In addition, line CC
The same applies to the case where D1 is moved.

Next, the operation of the film player according to the present invention will be described with reference to FIG. First, line C
The case where the CD 1 is fixed will be described. When the film is inserted into an insertion portion of a film player (not shown), the film 21 is set at an initial position, and in this state, the format at the time of shooting for each frame from the lead portion of the film 21 is changed to a magnetic reading unit (MH) 20. (♯1-♯5).
Depending on the detection result, the program is $ 5, $ 25, $ 4
5. Branch to $ 65.

First, when the frame of the film 21 is in the format of the normal horizontal position (YES at # 5), first, the timer t
Is reset started, and the image of that frame is
An image is taken at D1 (# 7, # 9). Next, as described above, the data is thinned out by the thinning circuit 3, and WB,
The signal processing is performed by the γ correction and matrix circuit 4 and sent to the memory 9 (# 11- # 15). Next, the film is fed by the film feeding unit 22 and the film feeding speed control unit 23 at a predetermined speed for a predetermined time.
Thereafter, the feeding of the film 21 is stopped, and this is repeated until the entire area of one frame of the film has been scanned (♯).
17-♯23).

When the frame on the film 21 is in the panoramic horizontal position, the normal vertical position, and the panoramic vertical position, the flow of # 27, # 47, and # 65 or less is repeated. Except that the speed is driven at each of the above-mentioned speeds, it is the same as the case of the normal horizontal position just described, and a detailed description thereof will be omitted.

Next, another embodiment of the present invention will be described. In another embodiment, the film 21 is fixed,
Instead, the line CCD 1 is moved. FIG. 11 shows a flowchart in this case. The contents performed in this case are the same as those described with reference to FIG. 10 except that the film feeding speed control is replaced with the movement speed control of the line CCD 1, and the description thereof is omitted. .

[0042]

As described above, according to the present invention, an image sensor is used to read an image on a film, and the sampling interval can be changed depending on the format of each frame of the film. Will be possible. As a result, an inexpensive film player can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining a main part of a film player according to the present invention.

FIG. 2 is a diagram for explaining a state in which a line CCD 1 reads an image on a film.

FIG. 3 is a diagram showing a configuration of a line CCD.

FIG. 4 is a diagram illustrating a relationship between a VRAM and the number of scanning lines and horizontal resolution when output to a television.

FIG. 5 is a diagram showing a scanning method in a case of a normal format horizontal position.

FIG. 6 is a diagram illustrating a scanning method in the case of a panorama format horizontal position.

FIG. 7 is a diagram showing a scanning method in the case of a normal format vertical position.

FIG. 8 is a diagram illustrating a scanning method in a panorama format vertical position.

FIG. 9 is a diagram showing ranges of the number of pixels and the number of readings of the line sensor in each format.

FIG. 10 is a flowchart for explaining the operation of the film player according to the present invention.

FIG. 11 is a flowchart illustrating another embodiment of the operation of the film player according to the present invention.

[Explanation of symbols]

 1 line CCD 2 C.I. D. S. 3 Thinning-out circuit 10 VRAM 22 Film feeder 23 Film feed speed controller

Continued on the front page (72) Inventor Takehiro Kato 2-3-13 Azuchicho, Chuo-ku, Osaka City Inside Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Katsuyuki Namba 2-3-1, Azuchicho, Chuo-ku, Osaka-shi Osaka International Building Minolta Camera Co., Ltd. (56) References JP-A-58-182384 (JP, A) JP-A-48-17214 (JP, A) JP-A-51-107027 (JP, A) JP-A-64 JP-A-16081 (JP, A) JP-A-62-147869 (JP, A) JP-A-61-139169 (JP, A) JP-A-5-54117 (JP, A) (58) Fields investigated (Int. . ^7, DB name) H04N 5/222 - 5/257 H04N 5/335

Claims (1)

(57) [Claims] 1. A film player for reproducing an image recorded on a developed film, comprising: an image pickup device for converting an image recorded on the film into an electric signal; and each frame of the image recorded on the film. A film player, comprising: detecting means for detecting the format information of the above; and control means for controlling switching of a sampling interval of the image sensor corresponding to each frame based on a detection result from the detecting means.