JPH02177673A - Still picture recorder - Google Patents

Abstract

PURPOSE:To prevent the retention of a still picture signal under an incomplete recording state by automatically reproducing the still picture signal recorded lastly immediately after the recording of the still picture signal and displaying the normal/defective condition of the recording state obtained by a deciding means. CONSTITUTION:A deciding means 16 decides the normal/defective condition of the recording state of a storage unit based on a reproduced signal from the storage unit. A control means for controlling the operation of this deciding means 16 automatically reproduces the still picture signal recorded lastly out of consecutive still picture signals stored in a storing means immediately after the still picture signal is recorded and makes the deciding means 16 decide the normal/defective condition of the recording state especially at consecutive photographing. A display means 17 visually or aurally displays the normal/ defective condition of the recording state at this time obtained by the deciding means 16. Thus, it can be prevented that the still picture signal under the incomplete recording state is retained.

Description

[Detailed description of the invention] [A field of use in business] The present invention relates to a still image recording device.

[Prior Art] Generally, as a method of recording still images, a method of photographing with a still camera using a silver halide film as a medium is widely known. However, with this method, it is only possible to confirm whether the image taken immediately after shooting has been completely recorded on the medium after a certain chemical treatment is performed. For example, photographic defects caused by various factors such as improper exposure, out-of-focus, camera shake, and incorrect loading of the medium can only be detected after the medium has been developed, printed, enlarged, etc. In addition, the chemical processing process requires specific equipment and a specific location, takes a long time, and cannot be immediately confirmed at the shooting location.

On the other hand, there is a method in which a still image is transferred to an image pickup tube, an image sensor, etc., photoelectrically converted, and the still image signal is recorded on a magnetic recording medium. According to this method, after an image signal is recorded on a magnetic medium, a still image can be obtained by reproducing the recorded signal using an image reproducing device. Moreover, since an electric signal is used to reproduce the image, it is possible to obtain a still image. When determining whether a product is good or bad, the process is simpler and takes much less time than when recording using silver salt as a medium.

[Problems to be Solved by the Invention] However, in such an image recording device that utilizes magnetism, the following problems may occur during photographing.

In other words, malfunction of the circuit inside the device during shooting,
Problems caused by the recording medium, such as poor contact between the recording head and the magnetic sheet, or if the recording medium is removable from the imaging device, dirt may adhere to the sheet or the head due to opening and closing of the media loading/unloading port, or the head may There are problems such as adhesion of magnetic powder to the head due to contact between the head and the sheet.

Therefore, even in this type of magnetic recording device, there are factors that tend to cause defective imaging, and it is important to easily check whether the imaging is good or bad immediately after imaging.

The present invention has been made in view of this situation, and it is possible to automatically determine whether an image signal has been completely recorded on a recording medium immediately after shooting, and to save an incompletely recorded image signal. The present invention aims to provide a still image recording device that eliminates wasteful use of recording media.

[Means for Solving the Problems] In order to achieve the above-mentioned problems, the still image recording device of the present invention includes a photographing optical system and an imaging means for photoelectrically converting a subject image formed by the optical system into a still image signal. and a storage means having a plurality of storage units for storing one screen worth of the still image signal, and a determination means for determining whether the recording state of the storage unit is good or bad based on a reproduction signal from the storage unit, A plurality of still image signals successively generated from the imaging means in response to a start signal are recorded in the storage means, in which the last of the series of still image signals stored in the storage means The apparatus is provided with a control means for automatically reproducing a recorded still image signal immediately after recording and causing the determination means to determine whether the recording state is good or bad, and a display means for displaying whether the recording state is good or bad by the determination means.

The storage means may be equipped with a magnetic disk, for example, and in this case, the storage unit is constituted by a track provided on the magnetic disk, and the control means is configured to transmit still image signals to the magnetic disk. It is sufficient to provide a head moving means for moving the magnetic head for recording in the radial direction of the disk.

Further, a solid-state memory may be used as the storage means. In this case, the storage unit is constituted by a storage area for each screen set in the solid-state memory, and the control means is configured to record signals to the solid-state memory. It is preferable to provide a memory control means for controlling the memory.

[Function] In the still image recording device of the present invention, the subject image formed by the photographing optical system on the imaging plane of the imaging means in response to the photographing start signal is photoelectrically converted by the imaging means into a still image signal; A plurality of still image signals continuously generated from the imaging means are stored for one screen in each of the plurality of storage units of the storage means. The determining means is for determining whether the recording state of the storage unit is good or bad based on the reproduction signal from the storage unit, and the control means for controlling the operation of the determining means is configured to determine whether the recording state of the storage unit is good or bad based on the reproduced signal from the storage unit, and the control means for controlling the operation of the determination means is configured to control the recording state of the storage unit, especially during snapshotting. Immediately after recording, the last recorded still image signal of the series of still image signals is automatically reproduced, and the quality is determined by the determining means. The display means visually or audibly displays the quality of the recording state determined by the determination means at this time. In this way, the recording status of the last recorded portion of a series of still image signals recorded in the storage means is automatically determined and displayed immediately after the recording, and if it is not complete, the signal is not saved. It is used to perform processing operations such as:

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a case where an embodiment of the present invention is applied to a still image recording apparatus using a magnetic recording medium will be described with reference to the drawings.

[Embodiment] FIG. 1 is an explanatory diagram of the arrangement of switches in a still image recording device according to an embodiment of the present invention, FIG. 2 is a block diagram of the device with an erasing head, and FIG. 3 is a diagram of the device with an erase head. FIG. 3 is a block diagram without an erase head.

In FIG. 1, the still image recording device includes a shooting start button 1 and a playback function switch (hereinafter abbreviated as playback SW).
2, manual playback switch (hereinafter referred to as manual SW) 3, and head shift switch (hereinafter referred to as shift S)
4 switches (abbreviated as W) are installed.

Next, modes using each switch will be explained.

(1) Mode 1 (a) When there is an erase head: When button 1 is pressed with playback SW2 in the ON state, it is determined immediately after recording whether the image signal has been completely recorded on the magnetic sheet, and the result is displayed on the LED. .

This is displayed using a buzzer or the like, and if the recording is complete, the recording head is moved to the next track in preparation for the next shooting. If the recorded track is not completely recorded, the recorded track is immediately erased using the erasing head, and the recording head is left at the original track position without moving, in preparation for the next photographing.

In this mode, even if the recorded state is not perfect, the recorded track is erased and re-recorded on the same track, so you can reshoot without wasting any tracks.

(b) When there is no erasing head: When the reproduction SW 2 is in the ON state and the shooting start button 1 is pressed, immediately after recording, it is determined whether the image signal has been completely recorded on the magnetic sheet, and the result is displayed. ,
Regardless of the judgment, the recording head is moved to the next track.

This mode wastes tracks if the recording is not complete, but it informs the photographer of incomplete recording and prompts the photographer to decide whether to record the same subject again on the next track. be able to.

(2) Mode 2 This mode is a mode for checking the recording status of any track at any time.

When not shooting, use shift SW4 to shift the playback head to any track whose recording status you want to check, then press manual SW3 to play that track and check whether or not an image signal is recorded on that track. If so, determine whether the recording status is complete and display the result.

For devices with an erase head, if the recording is complete, the recording head moves to the next track, if the recording is incomplete, the erase head erases that track, and the recording head remains at the same track position without moving. You can prepare for the next shooting.

In an apparatus not equipped with an erasing head, this mode is simply a mode for checking whether the recording state is good or bad, and the head is moved to the next track regardless of the judgment result.

In this mode, it is possible to obtain recorded information on any track when replacing the recording medium, and to reconfirm recording.

(3) Mode 3 (when the recording head and playback head are used as both) If a so-called recording/playback head is used, which is used as both the recording head and the playback head, playback is performed with the playback SW2 turned OFF during the tffi shadow. stop functioning. This makes it possible to stop the playback determination function of this apparatus during high-speed shooting in which multiple frames of still images are continuously taken at high speed by continuing to press button 1. During this continuous shooting, only the last frame is checked in mode 1. The reason for providing this mode 3 is that when using a recording/playback head, playback cannot be determined until the recording of one frame of still images is completed, but when shooting at high speed, the playback cannot be determined until continuous shooting is completed. This is because there is no time available for determination and deletion.

If you want to check whether the recording of any frame before the final frame is complete, you can check any track according to the above-mentioned mode 2 method after snapshot recording.

Note that operability can be improved by turning off the playback SW in conjunction with the operation for selecting the high-speed snapshot mode. This mode 3 also reduces the power consumption of this device.

Next, details of the still image recording device equipped with an erasing head will be explained based on FIG. 2.

First, the outline will be explained. The light beam passing through the lens 5 is photoelectrically converted by a solid-state image sensor 6 such as a COD and converted into a still image signal. This still image signal is transmitted to a head amplifier 7, a recording signal processing circuit 8, a modulation circuit 9, and a recording amplifier 1.
0 and is recorded onto the magnetic sheet 12 by the recording head 11.

At this time, the magnetic sheet 12 is being rotated by the motor M at a constant rotation speed. In addition, each of these components 5 to 1
2 is the same as that of the prior art, so a detailed explanation thereof will be omitted.

On the other hand, the recorded image signal is immediately reproduced by the reproduction radar 13 after a slight time delay due to the interval with the recording head, and is sent to the reproduction signal determination circuit 16 via the switch I4A and the reproduction amplifier 15. Here, the image signal is judged and a judgment signal corresponding to the quality of the recording state is output, and this result is sent to the display circuit 17 as a display signal on the one hand, and to the OR circuit 18 as a head shift signal on the other hand. sent to each. The output of the OR circuit 18 is sent as a head shift signal to the driver circuit 25. The driver circuit 25 moves the track positions of the recording head 11, the reproducing head 13, and the erasing head (not shown). Needless to say, these heads are in contact with the same track on the magnetic sheet, and are arranged in the order of recording, reproduction, and erasing in the track running direction. The timing circuit 21 is a circuit that controls all timings of the recording and reproducing systems of this apparatus.

In FIG. 2, the photographing start switch 2o corresponds to the button 1 in FIG. 1, the reproduction switches 14A to 14C correspond to the reproduction SW2, and the switch 19 corresponds to the manual SW3. Thereafter, each switch 14A to 14C, 19
shall be referred to by the abbreviation of the corresponding switch. Further, the head shift SW4 in FIG. 1 is included in the access signal generation circuit 24, and the switch 2
3 is a switch that performs a switching operation in conjunction with the operation of the head shift SW4.

Next, the operation of the circuit accompanying the opening and closing of each switch will be explained for each of the above-mentioned modes.

(1) Mode 1 (with erase head) playback 5W14
When the shooting start switch 20 is pressed while a, 14B, and 14C are in the ON state, the timing circuit 21
Photographing is performed according to various control signals generated from the magnetic sheet 12, and still image signals are recorded on the magnetic sheet 12. Immediately after recording, the playback head 13 performs playback,
This reproduced image signal is sent to the reproduced signal determination circuit 16 via the reproduced SWI 4A (ON state) and the reproduced amplifier 15. The reproduced image signal can also be viewed as it is on a screen display on a monitor or the like. In the reproduced signal determination circuit 16,
For example, the determination is made based on whether an RF flaw signal exists in the reproduced image signal. Then, a signal corresponding to the determination result is sent to the display circuit 17, and the display circuit 17 displays the result using an LED, a buzzer, or the like. As a display method, it may be displayed when the recording is complete, or vice versa, or it may be displayed in either case.

If the reproduction image signal is determined to be "good", the head shift signal for the track is sent from the determination circuit 16 to the driver circuit 25 through the OR circuit 18 and the switch 23 (ON state).
The driver circuit 25 advances the heads 11, 13 and the erase head (not shown) by one track.

If the determination is "No", no shift signal is given to the driver circuit 25 and the head 11.13 is not moved, so the current track position is maintained and the erase head is operated to erase the track. do.

Note that the switch 23 is normally turned to the ON side, and the shift 5W24 is set to the forward side (FORWORD) or the reverse side (
It will only fall to the OFF side when it falls to REVER5E).

The access signal generating circuit 24 is a circuit for generating an access signal for manually moving the head 11.13 and the erasing head forward in the direction of the next track or backward in the direction of the previous track.
The four contacts usually remain in the center. When the shift SW4 is pushed to one side, the switch 23 is pushed to the OFF side, and the circuit 24 is turned to the OFF side.
Access signals from the head are sent to the head driver circuit 25 to advance or retract the head 11.13 and the erase head. To distinguish whether the clock signal is forward or backward, the polarity of the signal may be reversed.

(2) Mode 2 As mentioned above, in this mode, the shift S
This is a mode for checking the recording state of any track selected by W4.

When playback 5W14A~14C is ON, manual 5W
By turning on No. 19, a playback start signal is input to the timing circuit 21 through the playback 5WI4, and the timing circuit 21 sends out the control (No. 8) necessary for playback confirmation, starts playing the selected track, and performs the following steps. The missing circuit operates according to the reproduction/judgment sequence of mode 1.

(3) Mode 3 As described above, in this mode, the reproduction function is stopped during snapshots, etc., and reproductions 14A, 14B, and 14C are all in the OFF state.

At this point, when the photographing start switch 20 is turned on, the timing circuit 21 is activated, photographing and recording are performed, and the head shift signal from the head shift circuit 22 is
It is sent to the driver circuit 25 through the OFF contact of the playback 5W14B, the OR circuit 18, and the switch 23, and is sent to the head 11.
．． 13 is automatically advanced by one track, while the device without an erasing head shown in FIG. 3 has exactly the same circuit for photographing and recording as shown in FIG.
In the reproduction circuit, a display signal is sent from the reproduction signal determination circuit 16 to the display circuit 17, and the determination result is displayed.
The only difference is that no head shift signal is sent. This is because, in this apparatus, the heads 11 and 13 are advanced to the next track regardless of the result of the determination of the reproduced image signal. For this purpose, each time the recording and reproduction of one frame's worth of still image signals is completed, a signal is sent from the timing circuit 21 to the head shift circuit 22, and when the circuit 22 receives the signal, the signal is sent to the head driver circuit via the switch 23. 2
Send head shift signal to 5.

Therefore, according to the previous embodiment, the track is automatically played back immediately after shooting and recording, and the quality of the recording is determined and the result is displayed, so the device with an erasing head can immediately erase the track. Furthermore, even in devices without an erasing head, the quality of the recording is displayed, so if you fail to record an important scene, for example, you can retake the image. Furthermore, even if a magnetic sheet is loaded into the device without being photographed halfway, it is possible to search for an empty track by using a manual switch.

In the above embodiment, a magnetic sheet was used as the storage means, but the present invention is not limited to this, and other magnetic recording media such as magnetic tape or magnetic drum may be used, or other recording methods may be used. For example, the magneto-optical recording method and JP-A-57-172
Semiconductor memory (shift register RAM-
It can also be applied to a purely electronic recording system using a magnetic bubble memory (magnetic bubble memory, etc.).

[Effects of the Invention] As is clear from the above description, the still image recording device according to the present invention automatically determines whether the recording state is complete immediately after recording, and if it is not complete, the signal is Since no storage is required, various effects seen in the above-mentioned embodiments can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the arrangement of switches in an image recording device according to an embodiment of the present invention, FIG. 2 is a block diagram of a control circuit when the device has an erasing head, and FIG. 3 is a diagram showing the erasing head of the device. FIG. 3 is a block diagram of a control circuit in the case without. (Explanation of symbols of main parts) 1... Button for starting shooting, 2... Playback function button,
3...Manual playback switch, 4...Head shift switch, 5...Lens, 6...Solid-state image sensor,
7... Head amplifier, 8... Recording signal processing circuit, 9
... Modulation circuit, 10... Recording amplifier, 11... Recording head, 12... Magnetic sheet, 13... Reproducing head, 14A. 14B, 14C...Switch, 15...Reproduction amplifier, 16...Reproduction signal determination circuit, 17...Display circuit,
18...OR circuit, 19...switch, 20...
Shutter button, 21...timing circuit, 22...
・Head shift clock circuit, 23... switch,
24...Switch, 25...Driver circuit. Agent Patent Attorney Masatoshi Sato

Claims (1)

[Scope of Claims] 1. A photographing optical system, an imaging means for photoelectrically converting a subject image formed by the optical system into a still image signal, and a storage unit for storing one screen worth of the still image signal. The apparatus includes a plurality of storage means, and a determination means for determining whether the recording state of the storage unit is good or bad based on a reproduction signal from the storage unit, and a plurality of still images continuously generated from the imaging means in response to a shooting start signal. In a still image recording device that records an image signal in the storage means, the still image signal recorded last among a series of still image signals stored in the storage means is automatically reproduced immediately after recording. 1. A still image recording apparatus, comprising: a control means for causing a determination means to determine quality; and a display means for displaying whether the recording state by the determination means is good or bad. 2. A magnetic disk is provided as the storage means, the storage unit is constituted by a track provided on the magnetic disk, and the control means controls the magnetic head for recording still image signals on the magnetic disk according to the radius of the disk. The still image recording apparatus according to claim 1, further comprising a head moving means for moving the head in a direction. 3. Memory control means comprising a solid-state memory as the storage means, wherein the storage unit is constituted by a storage area for each screen set in the solid-state memory, and the control means controls recording of signals to the solid-state memory. A still image recording device according to claim 1, characterized in that the still image recording device includes: