JP2007079913A - Image acquisition device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image acquisition device of an inexpensive configuration capable of conducting focus check at the time of acquiring an image, and of checking an imaging range in a display part of even a small display area. <P>SOLUTION: The image acquisition device includes: a light irradiation part for irradiate a photographic subject with guide light; an imaging illumination part for irradiating the photographic subject with light necessary for imaging; an imaging part for irradiating the photographic subject with the guide light from the light irradiation part, and imaging the photographic subject; a focus determination part for judging whether the distance between the photographic subject and the imaging part is within a predetermined focal range; an image storage part for storing the image taken by the imaging part; a determination result storage part for storing the results of the determination by the focus determination part; a display part for displaying the image stored in the image storage part and various kinds of information; and a display control part for displaying a predetermined part of the image stored in the image storage part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image acquisition device such as a barcode reader.

In recent years, image acquisition devices have been used in various fields as barcode readers and handy terminals. In an image acquisition apparatus that can decode a two-dimensional code, it is important to acquire an image efficiently, and an image acquisition apparatus that includes an autofocus function in an imaging unit and automatically performs focus adjustment has been proposed. The image acquisition unit includes an imaging unit and a light beam irradiation unit, and controls the autofocus function based on the acquired two-dimensional image information to automatically perform focus adjustment. (For example, refer to Patent Document 1.)
FIG. 19 shows the above-described conventional image acquisition apparatus, wherein 1 is a CPU, 2 is a memory, 3 is a two-dimensional imaging camera, 4 is a focus adjustment motor, 5 is a guide light unit, and 6 is a control unit.

  The operation of the image acquisition apparatus configured as described above will be described.

At the time of image capturing, a guide light for aiming at a reading object is emitted from the guide light unit 5 according to a command from the control unit 6. A two-dimensional image is obtained from the irradiated guide light by using the two-dimensional imaging camera 3. The control unit 6 detects how much the guide light captured in the obtained two-dimensional image is deviated from the center of the image, and calculates an approximate distance to the reading object. A predetermined reference value for distance is set in the memory 2, and the focus adjustment motor 4 is controlled by the control unit 6 based on the setting information in the memory 2. Thereby, the focus adjustment of the two-dimensional imaging camera 3 is automatically performed step by step.
JP 2002-56348 A

  However, the conventional image acquisition apparatus requires a two-dimensional imaging camera corresponding to the autofocus function, resulting in an increase in cost. In addition, an image acquisition device such as a handy terminal that works with a human hand may cause camera shake at the time of imaging, and the target to be acquired may protrude from the imaging range. Image information to be acquired may not be included in the image.

  The present invention provides an image acquisition device that allows an operator to adjust to a predetermined focus range without using an autofocus function, and that an object can be confirmed within an acquired image after image acquisition. The purpose is to provide.

  In order to solve the above problems, an image acquisition device of the present invention includes a light irradiation unit that irradiates a subject with guide light, an imaging illumination unit that irradiates the subject with light necessary for imaging, and the light irradiation unit. An imaging unit that irradiates the subject with guide light from the imaging unit, images the subject, a focus determination unit that determines that the distance between the subject and the imaging unit is within a predetermined focus range, and the imaging unit An image storage unit that stores the captured image, a determination result storage unit that stores the determination result of the focus determination unit, a display unit that displays the image and various information stored in the image storage unit, and the image storage unit Is provided with a display control unit for displaying a predetermined portion of the image stored in. With this configuration, it is possible to notify the operator of the focus information of the image to be acquired without using the autofocus function, and to adjust the focus range to a predetermined focus range. Can be confirmed.

  As described above, according to the present invention, it is possible to check the focus state even with a single focus inexpensive imaging unit by determining whether or not the predetermined focus range is obtained by using the guide light and the image. Even if a display device with a small display area such as a portable terminal is provided, it can be confirmed whether or not the subject is properly contained in the acquired image.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1 is a functional block diagram of the image acquisition apparatus. Reference numeral 101 denotes an imaging illumination unit that emits light necessary for imaging a subject to be imaged. Reference numeral 102 denotes an approximate angle of view when imaging a subject. Or a light irradiation unit for indicating the direction of the imaging unit 103, which will be described later, 103 is an imaging unit for capturing an image, and 104 is a focus determination unit that determines whether or not the captured image is within a predetermined focus range. , 105 is an image storage unit for storing an image captured by the imaging unit, 106 is a determination result storage unit for storing the determination result of the focus determination unit 104, and 107 is various information such as a captured image and character information. A display unit for display, 108 is a display control unit for displaying a predetermined portion of the image stored in the image storage unit 105, 109 is a key unit used by an operator as one of input means, and 120 is a focus unit. A control unit that controls the whole including the disconnection unit 104 and the display control unit 108, and 130 is a storage unit that stores other information including the image storage unit 105 and the determination result storage unit 106, and an image obtained from the imaging unit 103 The image acquisition device can determine whether the subject is within the imaging range by determining the focus state from the image and displaying a predetermined portion of the image on the display unit 107.

  FIG. 2 is a circuit block diagram of the image acquisition apparatus, in which 220 is a bus, 200 is a laser light source that is one of the components of the light irradiation unit 102, and 201 is a component of the light irradiation unit 102 as with the laser light source 200. One diffraction grating, 202 an illumination LED corresponding to the imaging illumination unit 101, 203 a CMOS sensor corresponding to the imaging unit 103, and other image sensors such as a CCD sensor may be used. 204 and 205 correspond to the control unit 120. Specifically, 204 is a CPU, 205 is a ROM storing various control programs, and 206 is a storage unit 130. The image storage unit 105 and the determination result storage unit For example, the ROM 205 or the image storage unit 105 may be a rewritable ROM such as FROM. Reference numeral 207 denotes an LCD corresponding to the display unit 107, and the key unit 109 includes a plurality of keys such as numeric input keys, character input keys, a power key, and an image acquisition trigger key.

  The operation of the image acquisition apparatus configured as described above will be described.

  When an image acquisition trigger key is pressed from the key unit 109 during image acquisition, light necessary for imaging is emitted from the illumination LED 202 which is the imaging illumination unit 101. At the same time, a laser beam is emitted from the laser light source 200, which is the light irradiation unit 102, to the diffraction grating 201, so that the laser beam is irradiated as guide light 300 as shown in FIG. Here, the shape as shown in FIG. 3 is used as an example, but this shape is not specially specified, and other shapes may be used. The operator uses the guide light 300 to aim at the imaging object. When the image acquisition trigger key is released, the imaging unit 103 captures an image. At this time, the guide light is also imaged together, and the captured image is stored in the image storage unit 105. Next, the focus determination unit 104 extracts an image from the image storage unit 105 and determines whether or not the focus is within a predetermined range.

  Here, a method for determining the focus will be described. FIG. 4 is a front view of the image acquisition portion, in which an imaging unit 103 and a diffraction grating 201 are attached side by side, and an illumination LED 202 is attached around the imaging unit 103. FIG. 5 is a diagram illustrating the imaging range of the imaging unit 103 and the optical axis and the focus state of the light irradiation unit 102, where 503 is the optical axis of the imaging unit 103, 504 is the optical axis of the light irradiation unit 102, and 505 is the imaging unit. The imaging range 103, 506a, 506b and 506c are subjects, 507a and 507b are predetermined focus ranges, and 507c, which is the point where the optical axis of the imaging unit 103 and the optical axis of the light irradiation unit 102 intersect, is ideal. The camera is in focus. As can be seen from FIG. 5, since the optical axes of the imaging unit 103 and the light irradiation unit 102 are arranged so as to intersect with each other, the guide light 300 imaged together with the subject is taken from the center of the image in places other than 507c. It will shift in either the left or right direction. FIG. 6A is a diagram when an image is captured when the subject is at a position 507c. Reference numeral 600 denotes an image, and reference numeral 601 denotes a center line in the image. From FIG. 6A, it can be seen that the guide light 300 is located at the center of the image. When an image is taken at a position closer to the predetermined focus position, the guide light is shifted to the left as shown in FIG. Further, when an image is taken at a position far from the predetermined focus position, the guide light is shifted to the right as shown in FIG. Thus, by detecting how much the position of the guide light in the captured image is deviated with respect to the left-right direction, it is possible to determine whether the focus position is close or far. Further, the focus state is not necessarily an ideal state depending on the use of image acquisition. For example, it may be a case where a barcode or a two-dimensional code is read or a case where information in an image is visible. In this case, as in 507a and 507b, it is possible to determine whether or not the focus state of the image is within a predetermined focus range by providing an allowable range for the focus state. When the focus is within the predetermined range, an image as shown in FIG. 6D is obtained. The determination result is stored in the determination result storage unit 106.

  The display control unit 108 has an enlargement / reduction function for displaying a predetermined portion of the image in the image storage unit 105. If the display unit 107 can display only binarized data, the image is binarized. If the image can be output and can be displayed with gradation, the image is converted into a displayable gradation and output. Needless to say, color may be used, and control is performed according to the performance of the imaging unit 103 and the display unit 107. FIG. 7A is an image of a home delivery slip 700 used in home delivery service or the like. For example, as shown in (b) of FIG. 7, the four corners 701 of the image are enlarged, and the drawing area of the display unit 107 is divided into four as shown in (a) of FIG. Display an enlarged image. By displaying in this way, it can be confirmed at a glance whether or not the subject is within the image. Note that the display unit 107 may be divided into two vertically and display the two corners forming the diagonal of the image as shown in FIG. 8B, or only one arbitrary corner as shown in FIG. 8C. May be displayed. Further, various information such as characters and images may be displayed together on the display unit 107. For example, as shown in FIG. 8D, the operator can change the focus state and imaging range from the display unit 107 at a time. As a result, it is possible to obtain more information.

  With the configuration described above, according to the present embodiment, it is possible to check the focus state of the acquired image even when a single-focus inexpensive CMOS or CCD is used. Furthermore, since an inexpensive configuration using the single-focus imaging unit 103 is sufficient, the cost of the product can be reduced. Furthermore, since the guide light 300 is used for image acquisition, it is easy to aim at the subject. Therefore, it is possible to efficiently collect an image whose focus is within a predetermined range. Furthermore, it is possible to confirm whether or not the subject is within the image even if the object can be mounted only with a small display device such as a portable terminal. Furthermore, it is possible to check whether or not camera shake has occurred by displaying an image. Furthermore, since an enlarged image such as four corners or two corners can be arbitrarily displayed, even when a large number of images are collected, the image checking operation can be performed very efficiently. Furthermore, since the focus determination and the imaging range can be confirmed, the operations from image acquisition to confirmation can be realized with a single apparatus, and a series of flows can be performed, and a large amount of images can be processed efficiently. .

(Embodiment 2)
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the functional block diagram of Embodiment 2 of the image acquisition device of the present invention shown in FIG. 9, 110 is a notification unit for notifying the operator of information from the determination result storage unit 106, and 111 is stored in the image storage unit. An image erasing unit for erasing the image being displayed, 112 is a confirmed information adding unit that gives information that the captured image has been confirmed in the display unit 107, and 113 is a time measuring unit that measures time.

  FIG. 10 is a circuit block diagram of Embodiment 2 of the image acquisition device of the present invention. 110a, 110b, and 110c are components of the notification unit 110. Specifically, 110a is a buzzer, 110b is an LED, and 110c is a VIB. The difference from the first embodiment is that a notification unit 110 for reporting a focus state, an image erasing unit 111 for discarding an image, and a confirmed information adding unit 112 for adding information that has been confirmed after image confirmation. And a time measuring unit 113 for measuring time.

  FIG. 11 is a diagram showing a series of flow from “image acquisition to image confirmation” in the image acquisition device, and FIG. 12 is an example of a flowchart showing “image acquisition processing flow” in the image acquisition device. FIG. 11 shows a specific flow from S1102 to S1104 included in S1110 in FIG.

  FIG. 13 is an example of a flowchart showing “image confirmation processing flow” in the image acquisition apparatus, and shows a specific flow from S1105 to S1107 included in S1120 in FIG.

  The operation of the image acquisition apparatus configured as described above will be described.

  S1101 in FIG. 11 is an initial setting in which settings used in “image acquisition” and “image confirmation” are performed. S1102 and S1104 indicate that the image acquisition process of S1103 is repeated, and S1105 and S1107 also indicate that the image confirmation process of S1106 is repeated. Initial setting S1101 is executed, and S1102 to S1104 of image acquisition are repeated a predetermined number of times. When the image acquisition is completed, the image confirmation of the acquired images from S1105 to S1107 is executed a predetermined number of times.

  First, the flow of image acquisition will be described with reference to FIG. When the trigger key for image acquisition is pressed in S1201, the illumination LED 202 is turned on in S1202, and the laser light from the laser light source 200 is irradiated to the diffraction grating 201 at the same time. Laser light emitted from the laser light source 200 forms a predetermined shape in the diffraction grating 201 and is emitted as guide light 300. In step S1203, the guide light 300 is used, and the operator aims at the subject that is the imaging target. When the image acquisition trigger key pressed in S1201 is released in S1204, the imaging unit 103 captures an image in S1205, and an image is acquired, and the image is stored in the image storage unit 105. In step S <b> 1206, the focus determination unit 104 detects the position of the guide light 300 from the image stored in the image storage unit 105. In step S <b> 1207, the focus determination unit 104 detects a shift from the image center of the guide light 300 in the image, and calculates the size of the shift to determine whether the focus at the time of image acquisition is within a predetermined range. . In this example, the laser light source 200 and the diffraction grating 201 are used, but an inexpensive member such as an LED may be used. For example, the guide light 301 in FIG. 3 may be used. In S1208 and S1209, the focus determination flag is set to OFF or ON, and the result is stored in the determination result storage unit 106 in S1210. In S1211, based on the determination result, the control unit 120 controls the buzzer 110a, the LED 110b, and the VIB 110c, which are the notification unit 110, and notifies the operator of the result. At this time, the operator may be notified by displaying information on the LCD 207 as the display unit 107 in accordance with the notification unit 110. In S1212, it is determined whether an image is necessary based on the result of S1211. Note that the determination in S1212 may be performed by the operator each time, or may be automatically set in the initial setting S1101. In the case of automatic setting, the image is automatically discarded when the focus is out of the predetermined range. If it is determined that the image is unnecessary, the image erasing unit 110 erases the image from the image storage unit 105 in S1213.

  In step S1214, it is determined whether image acquisition is complete. The determination here may be made by the operator or automatically based on a predetermined setting. If it is determined by the operator, the process ends when a predetermined key is pressed. In the case of automatic execution, the number of times of imaging and the number of stored images are designated in the initial setting in S1101. It is desirable to change this flexibly according to the environment in which it is used. When image acquisition is to be continued, the process proceeds to S1102 in S1215, and the above process is repeated. If it is determined that the image acquisition is complete, the image acquisition ends in S1104, and the process proceeds to the image confirmation in S1105.

  Next, a specific flow of “image confirmation” will be described with reference to FIG. In step S1301, the display control unit 108 extracts an image from the image storage unit 105, enlarges or reduces the four corners of the image to a predetermined size according to the size of the LCD 207 serving as the display unit 107, and enlarges the image in step S1302. Alternatively, the reduced image is displayed on the display unit 107 as display data. At this time, as in the first embodiment, it is possible to confirm whether or not the subject is within the acquired image range by displaying the image data at the four corners together as shown in FIG. Further, two corners forming a diagonal line of the image may be displayed as shown in FIG. 8B, or only one arbitrary corner may be displayed as shown in FIG. 8C. In S1303, the focus state at the time of image capture is confirmed from the determination result storage unit 106. Based on the result, the notification unit 110 is controlled in S1304 and S1305, and the operator is notified in S1306 and S1307. At this time, the focus state at the time of imaging may be notified to the display unit 107 using character information together with the image. Further, when the focus state is within a predetermined range, the notification unit 110 may be controlled not to operate. In this case, the notification unit 110 operates only when the focus is outside the predetermined range. Therefore, it is easy for the operator to understand. If the buzzer 110a is used as the notification unit 110, the state can be determined by sound, so that the operator can work efficiently with less movement of the viewpoint. Further, when the LED 110b is used, the visibility of judgment by visual observation is improved. Further, when the VIB 110c is used, since it can be determined by a tactile sense by vibration, it can be easily confirmed even in a noisy environment. Needless to say, any one of the buzzer 110a, the LED 110b, and the VIB 110c may be selected and used as a notification unit, or all of them may be used simultaneously.

  In step S1308, it is determined whether to discard the image. The determination method may be determined each time by the operator as in S1212 for image acquisition, or may be automatically determined based on a predetermined setting.

  If it is determined that the image data is unnecessary, the image data is discarded in step S1309. If the image data is not discarded, the confirmed information adding unit 112 stores the confirmed information in the storage unit 130 in association with the image in S1310. In step S1311, it is determined whether an unconfirmed image remains in the image storage unit 105. If there is an unconfirmed image, the process proceeds to the next image confirmation in S1312. If there is no unconfirmed image, the image confirmation ends in S1107.

  In the image confirmation, the timing for displaying the next image may be obtained by using the timer 113, and if the next image is automatically displayed when a predetermined time is counted, the operator can Image confirmation can be performed like a slide show. Note that images may be displayed one after another by pressing a predetermined key. Also, by using the confirmed information, only the unconfirmed image may be displayed, or only the confirmed image may be displayed. When confirming a large number of images, if a predetermined number of images to be displayed are created in advance by the display control unit 108, images can be displayed quickly even when performing image confirmation one after another. Can be made.

  In addition, the subject does not necessarily fall within the imaging range of the imaging unit 103 by one imaging. For example, as shown in FIGS. 14 (a) and 14 (b), when the subject does not fall within the imaging range, it is necessary to divide and image the left side and the right side. In this case, the image is acquired in two steps, the right end portion of the image obtained by capturing the left side of the subject from the image storage unit 105 is displayed on the display unit 107 by the display control unit 108, and the right side of the subject is captured. By displaying the left end portion on the display unit 107 as shown in FIG. 15 by the display control unit 108, it is possible to confirm the common part in the images of FIG. 14 (a) and FIG. 14 (b). Further, by displaying the left end portion of FIG. 14A and the right end portion of FIG. 14B as shown in FIG. 16, it is confirmed that the subject is reliably captured by combining the two images. I can confirm. In this example, the left side and the right side are divided into two cases. However, even for a larger subject, a plurality of images are acquired based on the same principle, so that the boundary area of each image is displayed on the display unit 107. By displaying on the screen, it can be determined whether or not the information necessary for the subject is included in the image, and the necessary information can be reliably stored as an image.

  As described above, according to the present embodiment, the process from image acquisition to confirmation can be efficiently performed as a series of operations. Furthermore, since the image can be erased by providing the image erasing unit 111, only necessary images can be efficiently collected. Furthermore, by providing the notification unit 110, it is possible to confirm using all of visual, auditory, and tactile senses, so that it can be used in various environments. Furthermore, by using the time measuring unit 113, the image checking operation can be performed without a key operation. Furthermore, by using the confirmed information adding unit 112, it is possible to efficiently confirm a plurality of images stored in the image storage unit 105. Furthermore, reconfirmation can also be performed. Further, when a large number of images are to be checked, images can be quickly displayed by creating the number of images to be displayed in advance.

  Furthermore, even if the subject is larger than the imaging range of the imaging unit 103, the images can be divided and acquired, and the boundary areas of the respective images can be displayed together to perform confirmation collectively.

(Embodiment 3)
In the present embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. In the functional block diagram of Embodiment 3 of the image acquisition device of the present invention shown in FIG. 17, reference numeral 114 denotes a case where optical information such as a barcode or a two-dimensional code is included in the image obtained from the imaging unit 103. A decoding unit 115 that performs decoding processing, 115 is an image stored in the image storage unit 105, and a communication unit that transmits and receives various types of information, and 116 is a communication that transmits only the image to which the confirmed information adding unit 112 has added confirmed information. It is a control unit.

  In the circuit block diagram of Embodiment 3 of the image acquisition apparatus of the present invention shown in FIG. 18, 115a, 115b and 115c correspond to the communication unit 115, 115a is a wireless LAN module, 115b is a Bluetooth module, and 115c is IrDA module.

  The first and second embodiments are different from the first embodiment in that a decoding unit 114 that decodes optical information, a communication unit 115 that transmits and receives various types of information including images, and a communication control unit 116 that transmits only images that have been confirmed. It is a point with.

  The operation of the image acquisition apparatus configured as described above will be described.

  At the time of image acquisition, when a bar code acquisition trigger key that is one of the key units 109 is pressed, light necessary for imaging is emitted from the illumination LED 202 that is the imaging illumination unit 101. At the same time, a laser beam is emitted from the laser light source 200, which is the light irradiation unit 102, to the diffraction grating 201, so that the laser beam is irradiated as guide light 300 as shown in FIG. Here, the shape as shown in FIG. 3 is used as an example, but this shape is not specially specified, and other shapes may be used. The operator uses the guide light 300 to aim at the imaging object. When the image acquisition trigger key is released, the imaging unit 103 acquires an image. At this time, the guide light 300 is also imaged together, and the captured image is stored in the image storage unit 105. The decoding unit 114 searches the image stored in the image storage unit 105 for optical information such as a barcode or a two-dimensional code. When the optical information is found, the decoding unit 114 performs a decoding process, and the decoded information is stored in the storage unit 130. In addition, by providing the communication unit 115, the image stored in the image storage unit 105 can be used in different places. Furthermore, it is expected that many images cannot be stored in the storage unit 130 including the image storage unit 105 in some cases. In this case, by transmitting data in the image storage unit 105 to the server side using the communication unit 115, it is possible to collect an image that is larger than the capacity of the storage unit 130.

  The communication unit 115 transmits information stored in the image storage unit 105 using the wireless LAN module 115a, the Bluetooth 115b, or the IrDA 115c by the series of processing illustrated in FIG. 11 described in the second embodiment. In addition, it is possible to transmit only the image to which the confirmed information is added by the confirmed information adding unit 112. In addition to the image, the communication data may be data obtained by decoding optical information, or by transmitting various other information together, it is possible to efficiently collect the image and various information.

  As described above, according to the present embodiment, since not only the image but also the optical information can be decoded by providing the decoding unit 114, it is possible to handle more diverse information and use it for various purposes. It becomes an image acquisition device. Furthermore, by providing the communication unit 115, a large number of images can be collected without worrying about the storage capacity even when the image acquisition device is a portable terminal. Furthermore, since the communication control unit 116 is provided, it is possible to easily select and transmit only images in which the captured subject is within a predetermined focus range and that are surely contained in the acquired image. A good image acquisition device can be realized.

  The image acquisition device of the present invention can be used to check the focus state and the imaging range in the acquired image with a single device, even with inexpensive members, and can be used for handy terminals used in various environments. Useful.

Functional block diagram of Embodiment 1 of an image acquisition device of the present invention The circuit block diagram in Embodiment 1 of the image acquisition apparatus of this invention The figure which shows the example of the guide light of this invention Mechanism diagram of reading portion of image acquisition apparatus of present invention The figure which shows the optical axis of the imaging part and light irradiation part of this invention The figure which shows the relationship between the image of this invention, and guide light The figure which showed the example of image acquisition of this invention The figure which showed the example of the image display method of this invention Functional block diagram in Embodiment 2 of the present invention Circuit block diagram in Embodiment 2 of the present invention The flowchart which shows a series of flow from the image acquisition to the image confirmation in Embodiment 2 of the image acquisition apparatus of this invention The flowchart which shows the example of the image acquisition process of this invention The flowchart which shows the example of the image confirmation process of this invention The figure which shows the example of the image acquisition of this invention The figure which shows the example of the image display method of this invention The figure which shows the example of the image display method of this invention Functional block diagram in Embodiment 3 of the present invention Circuit block diagram in the third embodiment of the present invention Functional block diagram of a conventional image acquisition device

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Imaging illumination part 102 Light irradiation part 103 Imaging part 104 Focus judgment part 105 Image storage part 106 Judgment result storage part 107 Display part 108 Display control part 109 Key part 110 Notification part 111 Image erasure part 112 Confirmed information provision part 113 Timing part 114 Decoding unit 115 Communication unit 116 Communication control unit 120 Control unit 130 Storage unit 200 Laser light source 201 Diffraction grating 202 Illumination LED
203 CMOS sensor 204 CPU
205 ROM
206 RAM
207 LCD
220 Bus 300 Guide light example using diffraction grating 301 Guide light example using LED 400 Reading window 503 Optical axis of imaging unit 504 Optical axis of light irradiation unit 505 Imaging range 506a Subject near position of imaging unit 506b Imaging unit 506c Subject that is in focus at the imaging unit 507a Position closest to the imaging unit that indicates the allowable focus range 507b Position that is farthest from the imaging unit that indicates the allowable focus range 507c Ideal that indicates the allowable focus range Focus position 600 Image 601 Horizontal center line of image 700 Subject 701 Target of image enlargement / reduction

Claims (8)

A light irradiator for irradiating a subject with guide light;
An imaging illumination unit that irradiates a subject with light necessary for imaging; and
An imaging unit that images the subject by irradiating the subject with guide light from the light irradiation unit;
A focus determination unit that determines that the distance between the subject and the imaging unit is within a predetermined focus range;
An image storage unit for storing an image captured by the imaging unit;
A determination result storage unit for storing the determination result of the focus determination unit;
A display unit for displaying the image and various information stored in the image storage unit;
A display control unit for displaying a predetermined portion of the image stored in the image storage unit;
An image acquisition apparatus comprising: The image acquisition apparatus according to claim 1, wherein the display unit further displays an image stored in the image storage unit and a determination result from the determination result storage unit in accordance with the display unit. The image acquisition apparatus according to claim 1, further comprising a notification unit for notifying an operator of a focus state of an image captured after imaging with a predetermined setting. The image acquisition apparatus according to claim 1, further comprising an image erasure unit that erases an image corresponding to the determination result when the determination result is not within a predetermined focus range. The image acquisition apparatus according to claim 1, further comprising a confirmed information adding unit that adds confirmed information to the image in a state where the display unit reproduces the image. The image acquisition device according to claim 1, further comprising a timing unit that counts time, and when the display unit reproduces the image and the elapsed time has been counted by the timing unit, An image acquisition apparatus having a function of automatically displaying other information. The image acquisition apparatus according to claim 1, further comprising a decoding unit that decodes optical information such as a one-dimensional code and a two-dimensional code from the acquired image. 5. The image acquisition apparatus according to claim 4, further comprising: a communication unit that transmits / receives an image stored in the image storage unit and other data; and the confirmed information adding unit that adds the confirmed information to the communication unit. An image acquisition apparatus comprising: a communication control unit that transmits only an image.

Images