CN102843508B - image capturing method and image capturing system - Google Patents

Abstract

An image capturing method and an image capturing system are provided. The image capturing method is suitable for a portable device, wherein the portable device is provided with a lens set, and the image capturing method comprises the following steps: sensing an image capturing action and an action time of the image capturing action. When the action time is more than or equal to a focusing scanning time of a focusing scanning performed by the lens group according to the image capturing action, a lens position determined by the focusing scanning is used as an image capturing lens position. When the action time is less than the focusing scanning time, a preset lens position is used as the image capturing lens position. An image capture is performed, wherein the lens assembly is located at the position of the image capture lens.

Description

Image capture method and image capture system

technical field

The present invention relates to a method and system for operating a portable device, in particular to an image capture method and system for determining the position of a lens of a portable device according to the type of user's image capture action.

Background technique

In today's era of information explosion, human life is inseparable from electronic communication. It is quite common for people to use electronic communication devices to transmit information to each other, especially portable electronic devices that can be carried with them, such as mobile phones or An electronic device with wireless communication function.

In today's increasingly developed mobile communication technology, the functions of mobile communication devices are still constantly being updated. In addition to functions such as listening to the radio, many mobile communication devices have developed a camera function at present, so when a user wants to take a photo as a souvenir, he can use the mobile communication device with the camera function to shoot digital images. However, apart from the quality of the camera lens equipped with the mobile communication device, the image capture technology of the camera cannot be ignored to determine the quality of the captured digital images.

In the prior art, during the image capture process, the image capture system will perform a focus scan after receiving the image capture signal to move the lens group of the lens for the object to be photographed, so that the object to be photographed is located in the lens group The focal length position to obtain the captured image with the best clarity. That is to say, there is a time gap between the reception of the image capture signal and the actual start of the shutter due to the focus scanning. Therefore, when the object to be photographed is a dynamic entity, it is impossible to accurately capture the moving moment of the dynamic object. Lost to record precious momentary images.

Contents of the invention

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

The present invention provides an image capture system, which quickly activates the image capture shutter according to the type of image capture action performed by the user on the portable device, so as to shorten the time difference between the activation of the shutter and the generation of the image capture action.

The present invention proposes an image capture method suitable for a portable device, wherein the portable device is configured with a lens group. The image capture method includes: sensing an image capture action and an action time of the image capture action. When the action time is greater than or equal to a focus scan time of a focus scan performed by the lens group according to the image capture action, a lens position determined by the focus scan is used as an image capture lens position. When the action time is less than the focus scanning time, a preset lens position is used as the image capture lens position. An image capture is performed, wherein the lens group is located at the position of the image capture lens.

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

In an embodiment of the present invention, the above-mentioned image capture method further includes: recording the position of the image capture lens for each image capture. The image capturing lens positions are counted to obtain a conventional lens position. The conventional lens position is used as the preset lens position.

In an embodiment of the present invention, the above-mentioned image capturing method further includes: performing the focusing scan according to the image capturing action.

The present invention also provides an image capturing system suitable for a portable device, wherein the portable device is equipped with a lens group. The image capture system includes: a motion sensing module, a lens position setting module, a lens driver and an image capture unit. The motion sensing module senses an image capture action and an action time of the image capture 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 performed by the lens group according to the image capture action, a lens position determined by the focus scan is used as an image capture lens position, and when the action time is less than the focus scan time, a preset lens position is used as the image capture lens position. The lens driver drives the lens group to the position of the image capture lens. The image capture unit performs an image capture.

In an embodiment of the present invention, the above-mentioned image capture system, wherein the lens driver drives the lens group to perform the focusing scan.

In an embodiment of the present invention, in the above-mentioned image capture system, the preset lens position corresponds to a focal length position, and the focal length position is about 100-200 cm.

In an embodiment of the present invention, the above-mentioned image capture system further includes: a recording module and a statistics module. The recording module records the position of the image capture lens every time the image is captured. The statistical module counts the image capture lens positions to obtain a conventional lens position, and provides the conventional lens position to the lens position setting module as the default lens position.

Based on the above, in the present invention, when the user generates an image capture action on the portable device, the portable device automatically sets the lens position of the lens group according to the mode of the user's image capture action (that is, the length of the action time). Is it the preset lens position, or the optimal lens position corresponding to the best focal length position determined according to the focus scanning result (ie, the image capture lens position). That is to say, when the user presses the shutter quickly to capture the image, 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 wasting time waiting for the focus scan, and the portable device can Quickly respond to the user's image capture action, shortening the time difference between when the shutter is activated and when the image capture action occurs.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of an image capture system according to an embodiment of the present invention.

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

Description of reference symbols

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 steps

Detailed ways

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

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

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

The lens position setting module 106 determines the lens position (lens position) of the lens group 102 focusing on the captured entity according to the motion time sensed by the motion sensing module 104 . Furthermore, the lens driver 108 drives the lens group 102 to the position of the image capture lens. The image capture 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 action, 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 shorter than the focus scanning time, the default lens position is used as the image capture lens position.

More specifically, when the user performs an image capturing action on the portable device 100 , the lens driver 108 is actuated to perform focus scanning on the entity to be photographed. Generally speaking, during the focus scanning process, the lens group 102 moves back and forth along the optical axis through the lens driver 108 until the image of the captured entity is placed on the image-capturing element (such as a charge-coupled device, charge-coupled device (CCD) )) When the frequency of the image capture signal generated by the above imaging is the largest, the position of the lens group is at the best lens position at this time, and the shooting entity is located at the focal length position of the lens group. That is, when the position of the lens group is adjusted so that the subject is located at the focal length of the lens group, the captured image of the subject is clearest. However, it takes a focus scan time to drive the lens group 102 to move back and forth along the optical axis via the lens driver 108 to find the optimal lens position.

Therefore, when the user generates an image capture action on the portable device 100, and the action time is longer than the focus scan time required by the lens group 102, the lens position setting module 106 will use the focus scan time after the focus scan is completed. The determined lens position (ie, the best lens position corresponding to the best focus position) is used as the image capture lens position.

However, when the user urgently presses the physical button representing image capture on the portable device 100 or the virtual button displayed on the touch screen, causing the action time to be shorter than the focus scanning time required by the lens group 102, the lens position setting The module 106 immediately uses the default lens position as the image capture lens position. In one embodiment, the focal length position corresponding to the preset lens position is, for example, 100-200 cm. In another embodiment, the preset lens position is, for example, the user's habitual lens position.

More specifically, the image capture system further includes a recording module (not shown) and a statistics module (not shown). The recording module records the position of the image capture lens each time the user uses the portable device 100 to capture an image. The statistics module counts the recorded image capture lens positions to obtain the user's usual lens positions, and provides the lens positions to the lens position setting module 106 as a default lens position. That is to say, when different users take pictures of different entities, they usually have personal preference. For example, they like to capture a panorama, a half-length, or even a head portrait of the captured image. By counting the user's lens position for each image capture, the user's image capture inertia can be calculated, and then the most suitable lens position for the user's image capture can be estimated, and then used This lens position is a default lens position.

Therefore, when the action time of the image capturing action generated by the user on the portable device 100 is shorter than the focus scan time, even if the object to be captured is not at the focus position corresponding to the default lens position, since the default lens position is the user’s Therefore, the probability of the shooting entity being located within the depth of field range of the focal length position increases, so the sharpness of the captured image is within a tolerable range. In this way, the image capture system of the present invention can quickly respond to the user's image capture action without waiting for time-consuming focus scanning, and greatly shorten the time difference between the image capture action and the shutter activation.

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

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

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

It should be noted that after sensing the image capture action, it also includes performing focus scanning according to the sensed image capture action. In addition, the aforementioned preset lens position is, for example, recorded by recording the position of the image capture lens each time the user performs image capture. The recorded image capturing lens positions are counted to obtain the user's habitual lens position, and the habitual lens position is used as the default lens position.

In the aforementioned embodiments related to the image capture system, it has been described in detail that according to the type of image capture action (that is, the length of the action time) generated by the user on the portable device, the lens position during image capture is determined. (in other words, the focal length position during image capture), so it will not be repeated in this embodiment. In addition, the image capture system of the present invention can be implemented by executing a computer-readable program. The computer-readable program can be stored in a computer-readable storage medium (not shown), and the processor of the portable device executes the instructions of the computer-readable program to implement the image capture system of the present invention. and image capture methods.

In the present invention, when the user generates an image capture action on the portable device, the portable device automatically sets the lens position of the lens group according to the mode of the user's image capture action (that is, the length of the action time). The lens position is also the optimal lens position corresponding to the best focal length position (that is, the image capture lens position) determined according to the focus scan result. Because the default lens position is based on the lens position commonly used by the general public when shooting images as the factory default value of the portable device, or the customized lens position is determined by analyzing the user's habitual lens position records. In this way, when the user is eager to capture the image of the dynamic entity, the image capture action generated by the user's rapid pressing of the shutter can touch the lens group of the portable device to directly advance the image capture of the dynamic entity with the preset lens position The focal length position corresponding to the default lens position is the focal length position commonly used by users, which increases the probability of the subject being photographed within the depth of field range of the focal length position, so the captured image clarity is within a tolerable range . Therefore, the portable device can quickly respond to the user's image capturing action without wasting time waiting for the focus scan, shortening the time difference between the shutter activation and the image capturing action.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection is based on the claims of the present invention.

Claims (6)

1. an image acquisition method, is applicable to a mancarried device, and wherein this mancarried device is configured with a set of lenses, and this image acquisition method comprises:

Respond to an operate time of an image capture action and this image capture action;

Be more than or equal to focal length sweep time of the focusing scanning that this set of lenses carries out according to this image capture action when this operate time, then scanning with this focusing the lens position determined is an image capture lens position;

Be less than this focal length sweep time when this operate time, then presetting lens position with one is this image capture lens position;

Carry out an image capture, wherein set of lenses is positioned at this image capture lens position;

This image capture lens position of record this image capture each;

Add up these image capture lens positions to obtain a usual lens position; And

Be this default lens position with this usual lens position.

2. image acquisition method as claimed in claim 1, wherein this default lens position corresponds to a focal position, and this focal position is about 100 ~ 200 centimeters.

3. image acquisition method as claimed in claim 1, also comprises: according to this image capture action, carries out this focusing scanning.

4. an image acquisition system, is applicable to a mancarried device, and wherein this portable assembling is equipped with a set of lenses, and this image acquisition system comprises:

One action sensing module, responds to an operate time of an image capture action and this image capture action;

One lens position setting module, wherein focus sweep time when this operate time is more than or equal to one of the focusing scanning that this set of lenses is carried out according to this image capture action, then scanning with this focusing the lens position determined is an image capture lens position, and be less than this focusing sweep time when this operate time, then presetting lens position with one is this image capture lens position;

One lens actuator, drives this set of lenses to this image capture lens position;

One image acquisition unit, carries out an image capture;

One logging modle, this image capture lens position of record this image capture each; And

One statistical module, adds up these image capture lens positions to obtain a usual lens position, and provides this usual lens position to this lens position setting module as this default lens position.

5. image acquisition system as claimed in claim 4, wherein this lens actuator drives this set of lenses to carry out this focusing scanning.

6. image acquisition system as claimed in claim 4, wherein this default lens position corresponds to a focal position, and this focal position is about 100 ~ 200 centimeters.