JPH05153481A - Film player - Google Patents

Abstract

PURPOSE:To provide the inexpensive film player. CONSTITUTION:The film player picks up a picture of each frame on a film 21. In this case, a magnetic read section MH 20 detects a format of the picture for each frame and a picture element signal is interleaved by an interleave circuit 3 at a prescribed rate based on the detection and the interleaved data are stored in a VRAM 10. The picture element signal in the subscanning direction at a right angle to the scanning direction of the line CCD 1 is interleaved by changing a film feeding speed with a film feeding speed control section 23.

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 image pickup device.

[0002]

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

[0003]

Generally, line sensors are less expensive than area sensors. On the other hand, when the line sensor is used, a memory is required to capture the image. Therefore, even if an attempt is made to reduce the cost of the device by using the line sensor, there is a problem that the cost of the memory is added and the cost of the device as a whole cannot be reduced.

The present invention has been made to solve the above problems, and an object thereof is to provide an inexpensive film player.

[0005]

A film player for reproducing an image recorded on a developed film according to the present invention includes a linear image pickup device for converting an image recorded on the film into an electric signal, and an image pickup device. A scanning unit that moves relative to the image in the main scanning direction and the sub-scanning direction, a detection unit that detects the format of the image recorded on the film, and a main scanning of the image sensor based on the detection result from the detection unit. Control means for controlling the scanning means so as to switch the sampling interval between the scanning direction and the sub-scanning direction.

[0006]

In the film player according to the present invention, since the image is read out by using the line sensor and the sampling interval of the image signal is changed depending on the film format, 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.

With reference to FIG. 1, the image on the film 21 is read by the line CCD 1 and the C.I. D. S. (Corel
Correlated double sampling is performed in the Ato Double Sampling. The microcomputer 16 determines the horizontal position and the vertical position of the film 21 at the time of shooting, and further determines whether it is a normal or panoramic image, and the data of the line CCD 1 is thinned by the thinning circuit 3 according to the shooting state.

The driver 14 is driven by the pulse from the timing generator 13, all the data in the line CCD 1 are read out, and then the film 21 is moved,
The next part is read. In this case also, the amount of movement of the film changes depending on the shooting condition. The thinning circuit 3 not only thins out pixel units of the line CCD 1 but also thins out line units.

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

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

The effect IC 12 is a circuit that transfers an arbitrary part of the semiconductor memory 9 to the VRAM 10. By moving the arbitrary part, panning, tilting, and electronic zooming are possible.

The VRAM 10 is a memory that corresponds to the TV in a 1: 1 ratio. The video written in the VRAM 10 is sent to the encoder 11 for each field (1/60 sec) and the signal from the sync signal generation circuit (SSG) 18 is supplied. After being combined by the encoder 11, it is DA converted by the DA conversion circuit 19 and becomes an NTSC signal and sent to the TV.

The operation switch 15 is a switch for knowing the state of the operating portion of the apparatus, and the mechanical switch 17 indicates the state of the mechanism of the apparatus, such as the position of the film 21 or the position when moving the line CCD 1. It is a switch to know.

The magnetic reading unit (MH) 20 includes a film 21.
It includes a magnetic head for reading the magnetic information recorded in 1., detects the format of the film 21 from the magnetic information read from the film 21, and outputs the content to the microcomputer 16.

The film 21 is fed by the film feeding unit 22, and the speed thereof is controlled by the film feeding speed control unit 23, and as a result, a desired image is taken according to 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 the base 33, the film 21 is driven by the 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 does not bend.

The line CCD 1 is, as shown in FIG.
For example, each of the R, G, and B pixels has 5600 pixels. Therefore, the total number of pixels is 16800 (5600 × 3).
In this embodiment, the longitudinal direction of the film 21 is the main scanning direction, and the direction in which the line CCD 1 and the film 21 relatively move is the sub-scanning direction. In the following examples, R, G, B
Each one pixel is collectively expressed 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 resolution.

In the figure, the VRAM 10 and the television correspond to each other at a ratio of 1: 1, and the vertical direction of the VRAM 10 is 48.
0 corresponds to 400 in the horizontal direction. Hereinafter, the number of pixels of the line sensor and the number of readings S in the sub-scanning direction are set based on this value.

FIG. 5 shows a scanning method in the case of the horizontal position in the normal format. ABCD in the figure indicates the film 21, and the hatched portion indicates the portion which is output to the VRAM 10 and reproduced on the television. Panning and tilting can be performed by moving the shaded portion in a state where the shaded portion is output (enlarged state) (depending on which portion is output to the VRAM 10).
Now, assuming that the enlargement ratio is 1.4 times, and if an image enlarged to 1.4 times corresponds to the above image quality, the vertical direction of the film (between ACs) is 480P × 1.4≈700P pixels. Need to memory in number. The 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 x in the lateral direction (between AB)
It is necessary to read 1.4 = 560S by the number of readings. In addition,
S attached to the number indicates the number of readings (the number of steps).

FIG. 3B shows an image pickup area at a unit time t, and the entire film is picked up in 560 steps.

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

Assuming that the image in the shaded area corresponds to the above image quality, the longitudinal direction of the film 21 (A
It is necessary to store (between C) 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 lateral direction (between AB) with the number of readings of 400S × 1.7≈700S.

FIG. 3B shows an image pickup area at a unit time t, and the entire film 21 is imaged in 700 steps. In this case, the width of the image picked up at the unit time t is 560/700 with reference to the horizontal position of the normal format. In this way, the speed control unit 23 controls the film feeding speed.

FIG. 7 is a diagram showing a scanning method in the case of the normal format vertical position. In this case, the vertical direction of the film 21 (between AC) is the horizontal direction on the TV screen, so 40
Memory is stored with the number of pixels of 0P. Next, the number of readings between AB is obtained. Generally, the film aspect ratio is 24 mm: 36.
mm = 2: 3, and the TV aspect ratio is 3: 4.
Therefore, in the case of vertical position than both aspect ratios, bd:
AB = 1: 2, and the number of readings is 480S × 2 = 960S
Becomes

FIG. 6B shows an image pickup area at a unit time t, and the entire film 21 is imaged in 960 steps. In this case, the width of the image picked up in the unit time t is 560/960 with reference to the horizontal position of the normal format.
In this way, the speed control unit 23 controls the film feeding speed.

FIG. 8 is a diagram showing a scanning method in the case of the horizontal position of the panoramic format. ABC as in the case of FIG.
Reference character D designates an area of one frame of the film 21, and shaded portion represents a portion reproduced on the television. The ratio (BD: EF) of the length in the lengthwise direction of the film to the length in the lengthwise direction of the portion where the image is reflected is 1.7: 1. Assuming that the image in the shaded area corresponds to the above image quality, it is necessary to store the film in the vertical direction (between ACs) with the number of pixels of 400P × 1.7≈700P. Multiplying 400P by 1.7 is the same as in the case of the vertical position of the normal format. The actual number of pixels is 700 × 3. Similarly, it is necessary to read in the lateral direction (between AB) by the number of readings of 480S × 1.7 × 2≈1650S.

FIG. 3B shows an image pickup area at a unit time t, and one frame of the film 21 is picked up in 1650 steps. In this case, the width of the image picked up at the unit time t is 560/16 when the horizontal position of the normal format is used as a reference.
Set to 50. In this way, the speed control unit 23 controls the film feeding speed.

FIG. 9 is a diagram showing the range of the number of pixels and the number of readings of the line CCD 1 based on the number of pixels of the line sensor and the number of readings based on the number of pixels and the number of readings taken in the memory in each format. .. The number of pixels of the line CCD 1 is 700, 800, 400, 7 required for each format.
The least common multiple of 00 is 5600. Therefore 5600
Imaging is performed 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 normal format horizontal position,
Only one of the eight pieces of data is sent to the memory, and seven pieces of data are thinned out by the thinning circuit 3.

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

(3) In the case of the normal format vertical position,
Only one of the 14 pieces of data is sent to the memory, and 13 pieces of data are thinned out by the thinning circuit 3.

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

The number of readings in the lateral direction of the film is 560 to 165.
It is 0, and the speed of film feeding is controlled so that the number of readings changes depending on each format. In addition, line CC
The same applies when D1 is moved.

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

First, when the frame of the film 21 is in the normal horizontal position format (YES in # 5), first the timer t
Is reset and started, and the image of that frame is line CC
The image is picked up at D1 (# 7, # 9). Then, as described above, the data is thinned by the thinning circuit 3, and WB,
The .gamma. correction and signal processing is performed by the matrix circuit 4, and the signal is 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.
After that, the feeding of the film 21 is stopped, and this is repeated until the entire area of one frame of the film is scanned (#
17- # 23).

When the frames on the film 21 are in the horizontal panoramic position, in the normal vertical position, and in the vertical panoramic position, the flow from # 27, # 47, and # 65 is repeated. Except that the speed is driven at each speed described above, it is the same as the case of the normal lateral position described above, and thus 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. A flowchart in this case is shown in FIG. In this case, the film feeding speed control is replaced with the moving speed control of the line CCD 1 and is substantially the same as that described with reference to FIG. ..

[0042]

As described above, according to the present invention, since the line-shaped image pickup device is used for reading the image on the film and the sampling interval can be changed depending on the format of the film, a line sensor is used and a small memory is used. It is possible to operate at capacity. As a result, an inexpensive film player can be provided.

[Brief description of 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 an image reading state of a film by a line CCD 1.

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

FIG. 4 is a diagram showing a relationship between 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 the case of a normal format horizontal position.

FIG. 6 is a diagram showing a scanning method in the case of a panoramic format horizontal position.

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

FIG. 8 is a diagram showing a scanning method in the case of a panoramic format vertical position.

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

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

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

[Explanation of symbols]

 1 line CCD 2 C. D. S. 3 Thinning circuit 10 VRAM 22 Film feeding unit 23 Film feeding speed control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Yakura 2-3-13 Azuchi-cho, Chuo-ku, Osaka, Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Takehiro Kato 2-chome, Azuchi-cho, Chuo-ku, Osaka 3-13 Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Katsuyuki Namba 2-33 Azuchicho, Chuo-ku, Osaka City Osaka International Building Minolta Camera Co., Ltd.

Claims (1)

[Claims] 1. A film player for reproducing an image recorded on a developed film, comprising a line-shaped image sensor for converting the image recorded on the film into an electric signal, and the image sensor for the image. Scanning unit that relatively moves in the main scanning direction and the sub-scanning direction, a detection unit that detects the format of the image recorded on the film, and a main scanning of the image sensor based on the detection result from the detection unit. And a control means for controlling the scanning means so as to switch the sampling interval between the scanning direction and the sub-scanning direction.