TWI474097B - Image capture method and image capture system - Google Patents

Description

Image capturing method and image capturing system

The present invention relates to a method and system for operating a portable device, and more particularly to an image capturing method and system for determining a lens position of a portable device according to a type of image capturing operation of a user.

In today's era of information explosion, human life is inseparable from electronic communication. It is quite common to use electronic communication devices to transmit messages to each other, especially portable electronic devices that can be carried around, such as mobile phones. A telephone or an electronic device with wireless communication capabilities.

Today, mobile communication technology is increasingly developed, and the functions of mobile communication devices are constantly being introduced. In addition to listening to broadcast and other functions, many mobile communication devices have developed camera functions, so when users want to take pictures, they can use digital camera communication devices to take digital images. However, in addition to the advantages and disadvantages of the camera lens equipped with the mobile communication device, the image capturing technology of the camera cannot be ignored.

Conventionally, during the image capturing process, after receiving the image capturing signal, the image capturing system performs a focus scan to move the lens group of the lens for the entity to be photographed, so that the photographed entity is located at the focal length of the lens group. Position to get the best captured image. That is, from receiving the image capture signal to the actual start of the shutter, there is a time difference due to the focus scan, so when the captured entity is a dynamic entity, the movement moment of the dynamic shooting entity cannot be accurately grasped. Thus losing the precious momentary image of the record.

The invention provides an image capturing method, which can quickly respond to a user's image capturing action.

The invention provides an image capturing system for quickly starting an image capturing shutter according to a type of image capturing action of a user on a portable device, so as to shorten a time difference between a shutter start and an image capturing action.

The present invention provides an image capturing method, which is applicable to a portable device, wherein the portable device is configured with a lens group, and the image capturing method includes: sensing an image capturing action and an action of the image capturing action time. When the operation time is greater than or equal to a focus scan time of a focus scan of the lens group according to the image capture operation, a lens position determined by the focus scan is an image capture lens position. When the action time is less than the focus scan time, the lens position is captured for the image with a preset lens position. An image capture is performed in which the lens group is located at the image capture lens position.

In an embodiment of the invention, the image capturing method, wherein the preset lens position corresponds to a focal length position, and the focal length position is about 100 to 200 cm.

In an embodiment of the present invention, the image capturing method further includes: recording the image capturing lens position captured by the image each time. The images are counted to capture the lens position to obtain a conventional lens position. The conventional lens position is the predetermined lens position.

In an embodiment of the present invention, the image capturing method further includes: performing the focus scanning according to the image capturing operation.

The invention further provides an image capturing system suitable for a portable device, wherein the portable device is configured with a lens group. The image capturing system comprises: a motion sensing module, a lens position setting module, a lens driver and an image capturing unit. The motion sensing module senses an image capturing action and an action time of the image capturing action. a lens position setting module, wherein when the action time is greater than or equal to a focus scan time of a focus scan of the lens group according to the image capture operation, a lens position determined by the focus scan is an image capture The lens position, and when the action time is less than the focus scan time, the lens position is captured for the image with a predetermined lens position. A lens driver drives the lens group to the image capture lens position. The image capturing unit performs an image capture.

In an embodiment of the invention, the image capture system, wherein the lens driver drives the lens group to perform the focus scan.

In an embodiment of the invention, the image capturing system, wherein the preset lens position corresponds to a focal length position, and the focal length position is about 100 to 200 cm.

In an embodiment of the present invention, the image capturing system further includes: a recording module and a statistical module. The recording module records the image capture lens position captured by the image each time. The statistical module counts the images to capture the lens position to obtain a conventional lens position, and provides the conventional lens position to the lens position setting module as the preset lens position.

Based on the above, in the present invention, when the user generates an image capturing operation on the portable device, the portable device automatically sets the lens group according to the mode in which the user generates the image capturing action (that is, the length of the action time). The lens position is the preset lens position, or the optimum lens position (ie, the image capture lens position) corresponding to the optimal focus position determined based on the focus scan result. That is, when the image capture operation generated by the user's sudden pressure shutter, the lens group of the portable device can be touched to directly capture the image of the dynamic entity with the preset lens position, without spending time waiting for the focus scan, and carrying The device can quickly respond to the user's image capture action, reducing the time difference between shutter start and image capture.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a schematic diagram of an image capture system in accordance with an embodiment of the invention. Referring to FIG. 1, the image capturing system of this embodiment is applicable to a portable device 100 (please refer to FIG. 2). The portable device 100 is, for example, a personal digital assistant (PDA), a PDA mobile phone, a smart phone, or a touch mobile phone. In addition, the portable device 100 is configured with a lens group 102.

The image capturing system includes a motion sensing module 104, a lens position setting module 106, a lens driver 108, and an image capturing unit 110.

The motion sensing module 104 senses an image capturing motion and an action time of the image capturing motion. That is, when the user generates an image capturing action on the portable device 100, including pressing a physical button representing the captured image or a virtual button displayed on the touch screen with a finger, an image capturing action is generated. The motion sensing module 104 senses the image capturing action and its action time. More specifically, the action time is, for example, an action period from the start of the image capture operation to the completion of the action.

The lens position setting module 106 determines a lens position of the lens group 102 that focuses on the captured entity based on the operation time sensed by the motion sensing module 104. Furthermore, lens driver 108 drives lens group 102 to the image capture lens position. The image capturing unit 110 performs an image capture.

That is, when the action time is greater than or equal to a focus scan time of a focus scan performed by the lens group 102 according to the image capture operation, the lens position setting module 106 uses the lens position determined by the focus scan as the image capture lens position. . On the other hand, when the action time is less than the focus scan time, the lens position is taken as the image with the preset lens position.

More specifically, when the user generates an image capturing action on the portable device 100, the lens driver 108 is activated to perform a focus scan on the entity to be photographed. In general, during the focus scan, the lens group 102 moves back and forth along the optical axis via the lens driver 108 until the image of the photographing entity is image-capturing element (such as a charge-coupled device). )) When the frequency of the image capturing signal generated by the upper imaging is the largest, the position of the lens group is at the optimal lens position, and the shooting entity is located at the focal length of the lens group. That is, when the lens group position is adjusted such that the photographing entity is located at the focal length position of the lens group, the captured image of the photographing entity is the clearest. However, driving the lens group 102 back and forth along the optical axis via the lens driver 108 to find the optimum lens position requires a focus scan time.

Therefore, when the user generates an image capturing action on the portable device 100, and the action time is greater than the focus scan time required by the lens group 102, the lens position setting module 106 focuses after the focus scan is completed. The position of the lens determined by the scan (i.e., the optimum lens position corresponding to the optimum focal length position) is taken as the image capturing lens position.

However, when the user presses the physical button on the portable device 100 to represent the captured image or the virtual button displayed on the touch screen, causing the action time to be less than the focus scan time required by the lens group 102, the lens position The setting module 106 immediately captures the lens position with the preset lens position as the image. In an embodiment, the focal length position corresponding to the preset lens position is, for example, 100 to 200 cm. In another embodiment, the predetermined lens position is, for example, a user's conventional lens position.

More specifically, the image capture system further includes a recording module (not shown) and a statistical module (not shown). The recording module records the image capturing position of the image captured by the user using the near-line image of the portable device 100. The image recorded by the statistical module statistic captures the lens position to obtain the usual lens position commonly used by the user, and provides the conventional lens position to the lens position setting module 106 as a preset lens position. That is to say, different users, when shooting different entities, usually have the inertia of personal use, for example, like the captured entity in the captured image is a panorama or a half body, or even just an avatar. By counting the lens position of each user's image capture, the user's shadow drop extraction inertia can be calculated, and the lens position that is most suitable for the user to perform image capture can be estimated. The lens position is a preset lens position.

Therefore, when the operation time of the image capturing action generated by the user on the portable device 100 is less than the focus scanning time, even if the shooting entity is not at the focus position corresponding to the preset lens position, the preset lens position is The user's usual lens position, so the probability that the shooting entity is within the depth of field of the focal length position is increased, so the image sharpness captured is within a tolerable range. In this way, the image capturing system of the present invention can quickly respond to the user's image capturing action without greatly waiting for the focus scan, and greatly shorten the time difference between the image capturing action and the shutter activation.

FIG. 2 is a schematic flow chart of an image capture method according to an embodiment of the invention. Referring to FIG. 2, the image capturing method of the present example is for a portable device (such as the portable device 100 of FIG. 1), and the portable device is configured with a lens group (such as the lens group 102 of FIG. 1). In step S201, an image capture operation and an action time of the image capture operation are sensed. Thereafter, in step S205, the operation time is compared with the focus scan time required for the focus scan.

When the operation time is greater than or equal to the focus scan time of the focus scan by the lens group according to the image capture operation, the lens position determined by the focus scan is the image capture lens position (step S211).

When the action time is less than the focus scan time, the lens position is captured as the image with the preset lens position (step S215). Next, an image capture is performed, wherein the lens group is located at the image capturing lens position (step S221).

It is worth noting that after the sensing image capture operation, the focus scan is performed according to the sensed image capture action. In addition, the preset lens position is, for example, an image capturing lens position by recording each time the user performs image capturing. The recorded image captures the lens position to obtain the user's usual lens position, and the conventional lens position is the preset lens position.

In the foregoing embodiment of the image capturing system, the type of image capturing operation (that is, the length of the action time) generated by the user on the portable device has been described in detail, and the image capturing time is determined. The concept of the lens position (in other words, the position of the focal length at the time of image capture) is not described in this embodiment. Furthermore, the image capture system of the present invention can be embodied by executing a computer readable program. The computer readable program can be stored in a computer readable and writable storage medium (not shown), and the computer readable program can be executed by the processor of the portable device to implement the image of the present invention. Take the system and image capture method.

In the present invention, when the user generates an image capturing operation on the portable device, the portable device automatically sets the lens position of the lens group according to the mode in which the user generates the image capturing action (ie, the length of the action time). Whether it is the preset lens position or the optimal lens position (ie, the image capturing lens position) corresponding to the optimal focal length position determined according to the result of the focus scan. The preset lens position is the preset position of the portable device when the image is commonly used by the general public to capture the image, or the position of the customized lens determined by analyzing the user's conventional lens position record. In this way, when the user is eager to capture the image of the dynamic entity, the image capturing action generated by the user's sudden pressure shutter can touch the lens group of the portable device to directly perform the image of the dynamic entity with the preset lens position. The focus position corresponding to the preset lens position is the focal position commonly used by the user, so that the probability that the captured entity is within the depth of field of the focal length position is increased, so that the captured image clarity is within a tolerable range. Inside. Therefore, the portable device can quickly respond to the user's image capturing action without delaying the focus scanning, and shorten the time difference between the shutter start and the image capturing action.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Portable device

102. . . Lens group

104. . . Motion sensing module

106. . . Lens position setting module

108. . . Lens driver

110. . . Image capture unit

S201~S221. . . Method flow step

1 is a schematic diagram of an image capture system in accordance with an embodiment of the invention.

FIG. 2 is a schematic flow chart of an image capture method according to an embodiment of the invention.

S201~S221. . . Method flow step

Claims (8)

An image capturing method is applicable to a portable device, wherein the portable device is configured with a lens group, and the image capturing method includes: sensing an image capturing action and an action time of the image capturing action; The action time is greater than or equal to a focus scan time of the focus scan of the lens group according to the image capture operation, and the lens position determined by the focus scan is an image capture lens position; when the action time is less than The focal length scanning time captures the lens position for the image with a predetermined lens position; and performs image capturing, wherein the lens group is located at the image capturing lens position. The image capturing method of claim 1, wherein the preset lens position corresponds to a focal length position, and the focal length position is about 100 to 200 cm. The image capture method of claim 1, further comprising: recording the image capture lens position captured by the image each time; counting the image capture lens positions to obtain a conventional lens position; The conventional lens position is the preset lens position. The image capturing method of claim 1, further comprising: performing the focus scanning according to the image capturing action. An image capturing system is applicable to a portable device, wherein the portable device is configured with a lens group, and the image capturing system includes: a motion sensing module, sensing an image capturing action and the image capturing action a lens position setting module, wherein when the action time is greater than or equal to a focus scan time of a focus scan of the lens group according to the image capture operation, a lens determined by the focus scan is used The position is an image capturing lens position, and when the action time is less than the focus scanning time, the lens position is captured by the predetermined lens position; and a lens driver drives the lens group to the image capturing lens position And an image capturing unit for performing image capturing. The image capture system of claim 5, wherein the lens driver drives the lens group to perform the focus scan. The image capturing system of claim 5, wherein the preset lens position corresponds to a focal length position, and the focal length position is about 100 to 200 cm. The image capturing system of claim 5, further comprising: a recording module that records the image capturing lens position captured by the image each time; and a statistical module that counts the image capturing The lens position is used to obtain a conventional lens position, and the conventional lens position is provided to the lens position setting module as the preset lens position.