JP2018006805A - Imaging apparatus, control method therefor, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus which enables a user to easily plan imaging and is capable of improving usability by effectively using storage capacity of the imaging apparatus, a control method therefor and a program.SOLUTION: RAW data generated by imaging and JPEG data generated on the basis of the RAW data are stored in a recording region in every imaging. The number of images that can be picked up is calculated on the basis of free capacity in the recording region, predetermined capacity for recording RAW data, capacitance of JPEG data being stored in the recording region and estimated capacitance for each piece of JPEG data, and the calculated number of images that can be picked up is reported. In accordance with the free capacity in the recording region, RAW data are deleted from the recording region.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an imaging apparatus, a control method thereof, and a program, and more particularly to an imaging apparatus that records images in two different formats at the time of shooting, a control method thereof, and a program.

  Conventionally, a technique has been disclosed in which, when the recordable area of a recording medium of a digital camera is less than a predetermined lower limit value, images stored in a designated directory are deleted in ascending order of retention priority to increase the number of shootable images. (For example, refer to Patent Document 1).

  There are also digital cameras that record images in two different formats, JPEG image data (JPEG data) and RAW image data (RAW data) during shooting. In such digital cameras, JPEG data recorded at the time of shooting is simply displayed, while image adjustment is performed based on RAW data, development processing is performed to generate a variety of images by generating JPEG data. It is possible to get.

JP 2007-36582 A

  However, in digital cameras that record images in the above two different formats, not only JPEG data but also RAW data with a larger amount of data are recorded by shooting, so the number of images that can be shot decreases drastically when shooting is repeated. End up. For this reason, when image adjustment is performed on RAW data and development processing has been completed, or when development processing using RAW data is unnecessary, the storage capacity is wasted by continuing to store the RAW data. The problem arises.

  On the other hand, the above-mentioned prior art can only delete the still image files compressed by the JPEG method stored in the DCF standard directory in order from the lowest holding priority, and cannot solve the problem.

  An object of the present invention is to provide an imaging apparatus, a control method thereof, and a program that can improve the usability by making it easier for a user to make a shooting plan by enabling effective use of the storage capacity of the imaging apparatus. The purpose is to provide.

  The imaging apparatus of the present invention includes an acquisition unit that acquires a first format image generated by shooting for each shooting, and a generation unit that generates a second format image based on the first format image. Storage means for storing the first format image and the second format image in a recording area; a free capacity in the recording area; a predetermined capacity for recording the first format image; Calculating means for calculating the number of storable images based on the capacity of the second format image stored in the recording area and the estimated capacity per image of the second format image; and the calculated The image processing apparatus includes: a first notifying unit that notifies the number of shootable images; and a deleting unit that deletes the image in the first format from the recording area according to a free space in the recording area.

  According to the present invention, by making it possible to effectively use the storage capacity of the imaging apparatus, it becomes easier for the user to make a shooting plan and usability can be improved.

It is a block diagram which shows the structure of the imaging device in the Example of this invention. It is a flowchart which shows the procedure of the imaging | photography process of a present Example. It is a flowchart which shows the procedure of the image reproduction | regeneration / adjustment process of a present Example. It is a figure which shows the state of the image data recorded with the recording device with which an imaging device is provided by the imaging | photography process of FIG.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention.

  FIG. 1 is a block diagram illustrating a configuration of an imaging apparatus 100 according to an embodiment of the present invention.

  In FIG. 1, the imaging apparatus 100 includes an optical system 101, an imaging element 102, a processing apparatus 103, a recording apparatus 104, an operation unit 105, and a display apparatus 106.

  The optical system 101 includes a lens, a shutter, and an aperture, and forms an image of light from a subject on the image sensor 102 with an appropriate amount and timing.

  The imaging element 102 converts light imaged through the optical system 101 into an image every time shooting is performed, and acquires image data as RAW data.

  The processing device 103 performs various operations and controls each part of the imaging device 100, and is realized by a CPU (Central Processing Unit) or the like. The processing device 103 also generates JPEG data based on the RAW data acquired by the image sensor 102.

  The recording device 104 records a program for controlling the imaging device 100, temporary data for reference by the processing device 103, and data for storage. The image data generated by photographing is also included in the data for saving. In this embodiment, this image data is recorded in two formats, RAW data (first format) and JPEG data (second format). The recording device 104 may be built in the imaging device 100 or may be detachable and replaceable.

  The operation unit 105 receives an operator's operation. The operation unit 105 may have a shape integrated with the display device 106 like a touch screen.

  The display device 106 displays a viewfinder image at the time of shooting, displays a shot image, and displays characters for interactive operation.

  FIG. 2 is a flowchart showing the procedure of the photographing process of this embodiment. This processing is performed by the processing device 103 reading and executing the program recorded in the recording device 104. In FIG. 2, both JPEG data and RAW data are recorded until the recording device 104 is full. However, when the recording device 104 is full, the RAW data is sequentially deleted. Finally, the recording apparatus 104 is set to a state in which JPEG data is recorded except for RAW data having a size of a minimum capacity (predetermined capacity) for RAW data described later. During this time, the number of JPEG data that can be finally photographed is always displayed on the display device 106 as the number of photographable images. Details of this processing will be described below. An example of how images are recorded and deleted will be described with reference to FIG.

  In FIG. 2, first, in step S201, the total capacity of the recording apparatus 104 is acquired. The total capacity is the total amount of data that can be recorded in the recording device 104 itself.

  In step S202, the minimum capacity for RAW data is calculated. The minimum capacity for RAW data is the minimum RAW data that is not deleted when the RAW data recorded in the recording apparatus 104 is deleted because the recording apparatus 104 runs out of free space during shooting. It is the capacity of data. The minimum capacity for RAW data may be a fixed value, or may be a value that varies depending on the total capacity of the recording device 104 at that time if the recording device 104 is detachable. It may be a value that can be set by a person. A value determined by these methods is set as the minimum capacity for RAW data.

  Thereafter, if the recording device 104 has free space for the next shooting (YES in step S203), the process proceeds to step S209. If not (NO in step S203), the process proceeds to step S204 to calculate the total data size of the RAW data recorded in the recording device 104 in order to free up a capacity for recording an image when a photographing operation is performed. . Note that the free space for the next shooting may be the amount of data (JPEG data and RAW data) generated by one shooting, or when shooting several to several tens of times in consideration of continuous shooting. It may be equivalent to the capacity of data to be generated.

  Thereafter, if the total data size of the RAW data calculated in step S204 is larger than the minimum RAW data capacity calculated in step S202 (YES in step S205), the process proceeds to step S207. Otherwise, that is, if the total data size of the RAW data is less than or equal to the minimum capacity for RAW data (NO in step S205), the process proceeds to step S206. Here, when there is no free space for the next shooting and the total data size of the RAW data is less than or equal to the minimum capacity for RAW data, there is no free space in the recording device 104, and more RAW data is deleted. There is no room for increasing the free capacity of the recording device 104. Therefore, in step S206, it is displayed on the display device 106 that the recording device 104 is full and no more images can be taken, and this processing is terminated.

  On the other hand, if there is no free space for the next shooting (NO in step S203), but the total data size of the RAW data is larger than the minimum capacity for RAW data (YES in step S205), the recording device can be deleted by deleting the RAW data. The available capacity of 104 can be increased. Therefore, in step S207, deletion target RAW data is determined. The method of determining the RAW data to be deleted is based on image attributes, such as deleting from the oldest shooting date and time, or deleting from RAW data used for image adjustment described later with reference to FIG. As a method of combining a plurality of attributes, first, RAW data used for image adjustment is deleted from the oldest one. Then, after all the RAW data used for image adjustment is deleted, the RAW data not used for image adjustment is deleted from the oldest shooting date.

  In addition, in the case where one JPEG data and a plurality of RAW data are shot at different shooting conditions in step S213, which will be described later, one image of the most suitable condition is left out of the plurality of shot RAW data. Alternatively, the image may be deleted.

  Thereafter, the RAW data to be deleted determined in step S207 is deleted (step S208), and the process returns to step S203.

  On the other hand, in step S209, the total data size of the JPEG data recorded in the recording apparatus 104 is calculated, and then the number of shootable images is calculated in step S210. The number of images that can be shot here is not simply the number of images that can be recorded with respect to the free capacity of the recording device 104, but the number that is expected to be deleted. Specifically, it is obtained by the following calculation formula.

Number of storable images = (Total capacity of recording device 104-Minimum capacity for RAW data-Total data size of JPEG data) / JPEG data size of one JPEG data size varies from image to image, but the size of one JPEG data (Estimated capacity per image in the second format) is estimated in order to calculate the number of images that can be captured in the image capturing apparatus 100. In this embodiment, a representative size of one piece of JPEG data is defined as the size of one piece of JPEG data.

  Next, in step S211, the number of shootable images calculated in step S210 is notified by being displayed on the display device 106. After that, when a shooting operation is performed on the operation unit 105 (YES in step S212), the process proceeds to step S213. .

  In step S213, the optical system 101 and the image sensor 102 are driven to perform shooting. Then, by the processing of the processing device 103, the image data is generated in each format of JPEG data and RAW data. As described above, in step S213, one piece of JPEG data and a plurality of pieces of RAW data may be shot under different shooting conditions. The method for changing the shooting condition of the RAW data includes exposure (changing the brightness and darkness of the image), focus (shifting the focus position little by little), and the like. At this time, an image under conditions that seem to be optimal and an image in which the conditions are changed little by little are taken. By performing such photographing, image processing can be performed using a plurality of images when image adjustment is performed, and as a result, the range of image adjustment can be widened. Further, the number of RAW data generated by this shooting is determined according to the free capacity of the recording apparatus 104.

  Thereafter, when the JPEG data and RAW data generated in step S213 are recorded in the recording device 104 (step S214), the process returns to step S203.

  FIG. 3 is a flowchart showing the procedure of the image reproduction / adjustment process of the present embodiment. This processing is performed by the processing device 103 reading and executing the program recorded in the recording device 104. In FIG. 3, reproduction and image adjustment are performed on the captured image. Details of this processing will be described below.

  In FIG. 3, first, in step S301, a display image when the imaging apparatus 100 is activated is set. There are various ways of determining the display image, and there are JPEG data taken last, JPEG data displayed when the power was turned off last time, and the like.

  Thereafter, in step S302, the display image (JPEG data) set in step S301 or steps S305 and S311 described later is read from the recording apparatus 104. In step S303, the read JPEG data is displayed on the image display screen of the display device 106.

  Next, in step S304, an operation on the operation unit 105 is detected. If the detected operation is an image feed operation, the process proceeds to step S305. If the detected operation is an image adjustment operation, the process proceeds to step S306.

  In step S305, a display image is set for the previous image, the next image, or the like according to the content of the image forwarding operation detected in step S304.

  On the other hand, in step S306, RAW data corresponding to the displayed JPEG data is read from the recording device 104, and a screen for image adjustment is displayed on the display device 106 (step S307). In this screen, an image and an interface for changing brightness, color tone, and the like are displayed.

  Next, an image adjustment operation by the user for the operation unit 105 based on the screen displayed in step S307 is accepted (step S308). Here, the result of image adjustment based on the received image adjustment operation may be immediately reflected on the image displayed on the display device 106 as a preview.

  Next, the RAW data is developed reflecting the image adjustment operation in step S308, and converted to JPEG data (step S309). Here, there is a case where the shooting in step S213 is performed by a method of acquiring one piece of JPEG data and a plurality of pieces of RAW data by changing shooting conditions. In this case, when a plurality of RAW data acquired by this method remain in the recording apparatus 104 without being deleted, image processing is performed using the plurality of RAW data. Thereby, the range which can adjust an image can be expanded.

  Thereafter, the JPEG data generated in step S309 is replaced with the JPEG data recorded in the recording device 104 (step S310). In step S310, the data may be stored as separate data instead of being replaced.

  In step S311, the adjusted image is set as a display image, and the process returns to step S302. Thereby, after returning to step S302, the adjusted image is displayed on the display device 106.

  FIG. 4 is a diagram illustrating a state of image data recorded by the recording device 104 included in the imaging device 100 by the imaging process of FIG.

  In the present embodiment, it is assumed that the total capacity of the recording apparatus 104 is 4 GB. For simplicity of explanation, the data size of one piece of JPEG data is 5 MB, the data size of one piece of RAW data is 20 MB, and 1 GB = 1000 MB. It should be noted that data other than images, such as recording area management data, is not considered here. In addition, since the recording apparatus 104 is generally capable of random access, each data in FIG. 4 merely indicates the distribution of each data size, and does not indicate the physical data area arrangement. .

  In the figure, (1) is the start of shooting, and the recording device 104 is empty.

  Here, when the minimum capacity for RAW data is set to 600 MB for 30 RAW data in step S202, the remaining area of the recording apparatus 104 becomes the capacity for JPEG data, and the capacity is 3.4 GB. The number of images that can be taken at this time is as follows.

((Total capacity of recording device 104-minimum capacity for RAW data)-total data size of JPEG data) / data size of one JPEG data = (4GB-600MB-0MB) / 5MB
= 3.4GB / 5MB = 680 sheets

  (2) in the figure is the state at the time of shooting 30 images from the start of shooting. RAW data 30 sheets = 600 MB, JPEG data 30 sheets = 150 MB occupy the respective capacities. The total data size of RAW data is 600 MB, which is just equal to the minimum capacity for RAW data. The number of images that can be taken at this time is as follows.

((Total capacity of recording device 104-minimum capacity for RAW data)-total data size of JPEG data) / data size of one JPEG data = ((4GB-600MB) -150MB) / 5MB
= (3.4GB-150MB) / 5MB
= 3250MB / 5MB = 650 sheets

  (3) in the figure is a state when photographing is performed until immediately before the RAW data deletion described in steps S207 and S208 is performed. At this time, the free area of the recording apparatus 104 is zero after 160 images have been taken. As described in step S203, in this embodiment, the recording capacity for the next shooting is always freed. Therefore, when the recording capacity for the next shooting is exhausted, the image is immediately deleted. In order to simplify the explanation, a state immediately before image deletion is shown. At this time, RAW data 160 sheets = 3.2 GB and JPEG data 160 sheets = 800 MB occupy the respective capacities. The number of images that can be taken at this time is as follows.

((Total capacity of the recording device 104-minimum capacity for RAW data)-total data size of JPEG data) / data size of one JPEG data = ((4GB-600MB) -800MB) / 5MB
= (3.4GB-800MB) / 5MB
= 2600MB / 5MB = 520 sheets

  (4) in the figure is a state when 30 more images are taken from the state (3) in the figure. At this time, the number of JPEG data is increased by 30 and JPEG data is 190 sheets = 950 MB. In addition, after RAW data is deleted, 38 images are deleted in order to free up a capacity for recording 30 JPEG data and RAW data. Deleted RAW data 38 sheets = 760 MB. At this time, since the RAW data is recorded more than the minimum capacity for RAW data, the RAW data can be deleted as much as the image is added after shooting. Then, the RAW data of 30 sheets taken later and the remaining RAW data not deleted are RAW data 152 sheets = 3.04 GB. The number of images that can be taken at this time is as follows.

((Total capacity of the recording device 104-minimum capacity for RAW data)-total data size of JPEG data) / data size of one JPEG data = ((4GB-600MB) -950MB) / 5MB
= (3.4GB-950MB) / 5MB
= 2450MB / 5MB = 490 sheets

  (5) in the figure is a state when the JPEG data capacity is full (680 sheets). At this time, the RAW data is deleted up to the minimum capacity for RAW data, and RAW data 30 sheets = 600 MB. The JPEG data is recorded to the full capacity for JPEG data, and 680 JPEG data = 3.4 GB. The deleted RAW data is 650 sheets = 13 GB. Further, since the JPEG data has been taken to the full capacity for JPEG data, no more pictures can be taken, and the state described in step S206. The calculation of the number of shootable images at this time is as follows.

((Total capacity of recording device 104-minimum capacity for RAW data)-total data size of JPEG data) / data size of one piece of JPEG data = ((4GB-600MB) -3.4GB) / 5MB
= (3.4GB-3.4GB) / 5MB
= 0MB / 5MB = 0 sheets

  By executing the processing as described above, both JPEG data and RAW data are recorded while the recording device 104 has free space. Also, when there is no more free space, newly taken JPEG data and RAW data can be recorded to the maximum while deleting RAW data sequentially (leaving the minimum capacity for RAW data). Further, the number of images that can be shot can be displayed from the beginning as the number of images that can be finally shot.

  In this embodiment, the memory for recording the JPEG data and the RAW data is the recording device 104 included in the imaging device 100, but is not limited thereto. For example, the memory may be an external memory on the cloud. In this case, the imaging apparatus 100 further includes a communication device that communicates with the cloud, and the processing device 103 communicates with the cloud in step S208 of FIG. 2 via this communication device, and deletes the deletion target RAW data from the external memory on the cloud. Request to do.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. A part of the above-described embodiments may be appropriately combined. Also, when a software program that realizes the functions of the above-described embodiments is supplied from a recording medium directly to a system or apparatus having a computer that can execute the program using wired / wireless communication, and the program is executed Are also included in the present invention. Accordingly, the program code itself supplied and installed in the computer in order to implement the functional processing of the present invention by the computer also realizes the present invention. That is, the computer program itself for realizing the functional processing of the present invention is also included in the present invention. In this case, the program may be in any form as long as it has a program function, such as an object code, a program executed by an interpreter, or script data supplied to the OS. As a recording medium for supplying the program, for example, a magnetic recording medium such as a hard disk or a magnetic tape, an optical / magneto-optical storage medium, or a nonvolatile semiconductor memory may be used. As a program supply method, a computer program that forms the present invention is stored in a server on a computer network, and a connected client computer downloads and programs the computer program.

DESCRIPTION OF SYMBOLS 100 Imaging device 101 Optical system 102 Imaging element 103 Processing apparatus 104 Recording apparatus 105 Operation part 106 Display apparatus

Claims (11)

Obtaining means for obtaining an image of the first format generated by photographing for each photographing;
Generating means for generating an image of the second format based on the image of the first format;
Storage means for storing the image in the first format and the image in the second format in a recording area;
Free space in the recording area, a predetermined capacity for recording the image in the first format, a capacity of the image in the second format stored in the recording area, and an image of the image in the second format A calculation means for calculating the number of possible shots based on the estimated capacity per frame;
First notifying means for notifying the calculated number of possible shots;
An image pickup apparatus comprising: a deletion unit that deletes the image in the first format from the recording area in accordance with a free space in the recording area.   The imaging apparatus according to claim 1, wherein the deleting unit determines an image to be deleted based on each attribute of the first format image stored in the recording area.   The deletion unit is configured to generate the second format image based on a result of image adjustment based on an instruction from a user among the first format images stored in the recording area. The imaging apparatus according to claim 1, wherein an image is deleted.   4. The imaging apparatus according to claim 1, wherein the second format image has a data size smaller than that of the first format image. 5.   5. The imaging apparatus according to claim 1, wherein the generation unit generates one image of the second format from a plurality of images of the first format. 6.   6. The imaging apparatus according to claim 5, wherein the generation unit generates the number of images of the second format according to the free space of the recording area.   The imaging apparatus according to claim 6, wherein the deleting unit further deletes at least one of the plurality of images of the first format according to a free space in the recording area.   There is no free space for the first format image and the second format image newly stored in the recording area at the time of the next shooting, and the total data size of the first format image is The imaging apparatus according to any one of claims 1 to 7, further comprising second notification means for notifying that no more photographing is possible when the capacity is less than a predetermined capacity. The recording area is in an external device,
A communication means for communicating with the external device;
9. The apparatus according to claim 1, wherein the deleting unit requests the recording area to delete the image of the first format according to a free capacity of the recording area via the communication unit. The imaging device according to any one of the above. Acquisition means for acquiring an image of the first format generated by shooting for each shooting; generation means for generating an image of the second format based on the image of the first format; An image pickup apparatus control method comprising: an image and a storage unit that stores an image of the second format in a recording area;
Free space in the recording area, a predetermined capacity for recording the image in the first format, a capacity of the image in the second format stored in the recording area, and an image of the image in the second format A calculation step for calculating the number of possible shots based on an estimated capacity per frame;
A notification step of notifying the calculated number of possible shots;
And a deletion step of deleting the image of the first format from the recording area in accordance with a free space in the recording area.   A program that causes a computer to function as each unit of the imaging apparatus according to any one of claims 1 to 9.

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