CN102244736B - Focal length positioning method for fixed-focus camera - Google Patents
Focal length positioning method for fixed-focus camera Download PDFInfo
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- CN102244736B CN102244736B CN2011101912909A CN201110191290A CN102244736B CN 102244736 B CN102244736 B CN 102244736B CN 2011101912909 A CN2011101912909 A CN 2011101912909A CN 201110191290 A CN201110191290 A CN 201110191290A CN 102244736 B CN102244736 B CN 102244736B
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Abstract
He invention provides a focal length positioning method for a fixed-focus camera, which comprises the steps as follows: A, whether an acquired image is clear is judged when a pre-pressing stroke is pressed, wherein a shooting key of the camera has two strokes, the first stroke is the pre-pressing stroke and the second stroke is a shooting stroke; B, if the acquired image is judged to be clear in the pre-pressing stroke, prompt information that the image is clear is given on a display screen of the camera, if the acquired image is not clear in the pre-pressing stroke, prompt information indicating that the image is not clear is given on the display screen of the camera; and C, if the prompt information that the image is clear is given, a user presses the second stroke to take photos, if the prompt information that the image is not clear is given, the user adjusts the far/near focus switch stroke and the camera continues carrying out the step A.
Description
Technical field
The present invention relates to focal length positioning method, relate in particular to the focal length positioning method of fixed-focus camera.
Background technology
Clear for the photo that camera is taken, adjust the focal length of camera lens.The camera that automatic focusing function is arranged is, with DSP, autofocus lens is sent scan instruction, the focal length stroke that this moment, camera lens can be regulated all is walked one time automatically, then the image of each focusing section can be temporarily stored in the middle of memory body, DSP can compare and find out one the most clearly, edge to these images, and the record focusing travel position of that photo is the most clearly got back in the requirement to camera lens that again sends instructions.Do not drive the focusing stroke of camera lens but have motor on the fixed-focus camera camera lens, so can't so do.Usually have the far-and-near focus switch of a switching focal length far away or nearly focal length on fixed-focus digital camera; its purposes is the focus adjustment of camera lens to be become to be fit to take the state of knowing closer object or the state of taking clear remote object; this far-and-near focus switch is to judge voluntarily adjusting by the user;, so often do not know how to use for the camera beginner, in case be adjusted in the photo of taking out in wrong position, will be fuzzy.
Summary of the invention
Be adjusted to wrong position for fear of the far-and-near focus switch, improve the success rate that camera is taken, the invention provides a kind of focal length positioning method of fixed-focus camera.
The invention provides a kind of focal length positioning method of fixed-focus camera, it is characterized in that, comprise the steps:
A. the shooting button of camera has two sections strokes, and the first paragraph stroke is the precompressed stroke, and the second stroke is the stroke of taking pictures, and whether the picture that judgement is obtained when pressing the precompressed stroke is clear;
If the picture that B. in the judgement of precompressed stroke, obtains is clearly, give so frame out information clearly on the display screen of camera,, if the picture that obtains in the judgement of precompressed stroke is unsharp, give so the unsharp information of frame out on the display screen of camera;
If C. give frame out information clearly, the user presses the second stroke and takes pictures so, if give the unsharp information of frame out, the user adjusts the far-and-near focus switch over travel and camera continues execution step A so.
The focal length positioning method of the application of the invention, whether the picture that can point out the user to obtain is clear, as clear in the picture that obtains, so just, can take pictures, if the picture that obtains is unintelligible, the user can adjust the far-and-near focus switch so, clearly to camera, pointing out the picture that obtains, so just, can take pictures, guarantee the definition of captured photo, improve the success rate that camera is taken.
As a further improvement on the present invention, comprise the steps: in described steps A
A1. after pressing the precompressed stroke, focusing indication frame and the picture that obtains appear in the display screen of camera;
Whether the picture that obtains that A2. occurs in judgement focusing indication frame is clear.
Because be only whether the interior picture that obtains that occurs of judgement focusing indication frame is clear, rather than judge in screen whether the picture that obtains that occurs is clear, and dwindled the area that the image to the picture that obtains judges, accelerated judgement speed, shorten the judgement time, improved working effect.And whether clear by the judgement picture that obtains that indication occurs in frame of focusing, be the picture that obtains that occurs in can clear and definite screen whether clearly.The picture that obtains that occurs in i.e. focusing indication frame is clearly, and the picture that obtains that occurs in screen so is also clearly; If the picture that obtains that occurs in focusing indication frame is unsharp, the picture that obtains that occurs in screen so is also unsharp.
As a further improvement on the present invention, comprise the steps: in described steps A 2
A21. find out the first color lump of area and the second largest color lump of area of the picture that obtains that occurs in focusing indication frame;
A22. calculate the excessive edge of the color lump area between the first color lump of area and the second largest color lump of area;
A23. color lump excessive edge area and standard value compare, if the excessive edge of color lump area greater than standard value, the picture that obtains so is unsharp, if the excessive edge of color lump area less than standard value, the picture that obtains so is clearly.
The focusing mode of fixed-focus camera is to realize that focusing accurately by the manual regulative mode of user, traditional way is to carry out the adjustable lens focal length by the definition of user's viewing optics picture window, but such architecture combined is very expensive, we are used as a kind of criterion referenced value with the user to the cognitive experience of image sharpness to be stored in the middle of program, then utilize the color color lump edge way of contrast of the picture in focusing indication frame, come with being stored in that program Plays value compares and the judged result that draws reminding user.
As a further improvement on the present invention, in described step B, picture information clearly is green for the focusing indication frame that occurs on display screen, and the unsharp information of picture takes on a red color for the focusing indication frame that occurs on display screen.
Indicate frame to present different colors by focusing, thereby provide the clear and definite information of user, help the user to carry out taking pictures of next step or focusing work.
Description of drawings
Fig. 1 is method flow diagram of the present invention.
Fig. 2 is the method flow diagram of one embodiment of the invention.
Fig. 3 is the method flow diagram of another embodiment of the present invention.
Embodiment
As shown in Figure 1, the invention discloses a kind of focal length positioning method of fixed-focus camera, comprise the steps: in step S1, the shooting button of camera has two sections strokes, the first paragraph stroke is the precompressed stroke, and the second stroke is the stroke of taking pictures, and whether the picture that judgement is obtained when pressing the precompressed stroke is clear.In step S2, if the picture that obtains in the judgement of precompressed stroke is clearly, give so frame out information clearly on the display screen of camera,, if the picture that obtains in the judgement of precompressed stroke is unsharp, give so the unsharp information of frame out on the display screen of camera.In step S3, if give frame out information clearly, the user presses the second stroke and takes pictures so, if give the unsharp information of frame out, the user adjusts the far-and-near focus switch over travel and camera continues execution step S1 so.
As shown in Figure 2, in step W1, after pressing the precompressed stroke, focusing indication frame and the picture that obtains appear in the display screen of camera.In step W2, whether the picture that obtains that occurs in judgement focusing indication frame is clear.In step W3, if the picture that obtains in the judgement of precompressed stroke is clearly, give so frame out information clearly on the display screen of camera,, if the picture that obtains in the judgement of precompressed stroke is unsharp, give so the unsharp information of frame out on the display screen of camera.In step W3, if give frame out information clearly, the user presses the second stroke and takes pictures so, if give the unsharp information of frame out, the user adjusts the far-and-near focus switch over travel and camera continues execution step W1 so.
As shown in Figure 3, in step Q1, after pressing the precompressed stroke, focusing indication frame and the picture that obtains appear in the display screen of camera.In step Q2, find out the first color lump of area and the second largest color lump of area of the picture that obtains that occurs in focusing indication frame.In step Q3, calculate the excessive edge of the color lump area between the first color lump of area and the second largest color lump of area.In step Q4, color lump excessive edge area and standard value compare, if the excessive edge of color lump area greater than standard value, the picture that obtains so is unsharp, if the excessive edge of color lump area less than standard value, the picture that obtains so is clearly.In step Q5, if the picture that obtains in the judgement of precompressed stroke is clearly, give so frame out information clearly on the display screen of camera,, if the picture that obtains in the judgement of precompressed stroke is unsharp, give so the unsharp information of frame out on the display screen of camera.In step Q6, if give frame out information clearly, the user presses the second stroke and takes pictures so, if give the unsharp information of frame out, the user adjusts the far-and-near focus switch over travel and camera continues execution step Q1 so.
Because be only whether the interior picture that obtains that occurs of judgement focusing indication frame is clear, rather than judge in screen whether the picture that obtains that occurs is clear, and dwindled the area that the image to the picture that obtains judges, accelerated judgement speed, shorten the judgement time, improved working effect.And whether clear by the judgement picture that obtains that indication occurs in frame of focusing, be the picture that obtains that occurs in can clear and definite screen whether clearly.The picture that obtains that occurs in i.e. focusing indication frame is clearly, and the picture that obtains that occurs in screen so is also clearly; If the picture that obtains that occurs in focusing indication frame is unsharp, the picture that obtains that occurs in screen so is also unsharp.
In the present invention, the alleged picture that obtains refers to the picture of subject.Step described in the present invention is to carry out by the cooperation of magazine hardware or software or hardware and software and magazine DSP.
The alleged DSP of the present invention is Digital Still Image Processor, that is: digital still image processor.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (2)
1. the focal length positioning method of a fixed-focus camera, is characterized in that, comprises the steps:
A. the shooting button of camera has two sections strokes, and the first paragraph stroke is the precompressed stroke, and the second stroke is the stroke of taking pictures, and whether the picture that judgement is obtained when pressing the precompressed stroke is clear;
If the picture that B. in the judgement of precompressed stroke, obtains is clearly, give so frame out information clearly on the display screen of camera,, if the picture that obtains in the judgement of precompressed stroke is unsharp, give so the unsharp information of frame out on the display screen of camera;
If C. give frame out information clearly, the user presses the second stroke and takes pictures so, if give the unsharp information of frame out, the user adjusts the far-and-near focus switch over travel and camera continues execution step A so;
Comprise the steps: in described steps A
A1. after pressing the precompressed stroke, focusing indication frame and the picture that obtains appear in the display screen of camera;
Whether the picture that obtains that A2. occurs in judgement focusing indication frame is clear;
Comprise the steps: in described steps A 2
A21. find out the first color lump of area and the second largest color lump of area of the picture that obtains that occurs in focusing indication frame;
A22. calculate the excessive edge of the color lump area between the first color lump of area and the second largest color lump of area;
A23. color lump excessive edge area and standard value compare, if the excessive edge of color lump area greater than standard value, the picture that obtains so is unsharp, if the excessive edge of color lump area less than standard value, the picture that obtains so is clearly.
2. focal length positioning method according to claim 1, it is characterized in that, in described step B, picture information clearly is green for the focusing indication frame that occurs on display screen, and the unsharp information of picture takes on a red color for the focusing indication frame that occurs on display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101912909A CN102244736B (en) | 2011-07-08 | 2011-07-08 | Focal length positioning method for fixed-focus camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101912909A CN102244736B (en) | 2011-07-08 | 2011-07-08 | Focal length positioning method for fixed-focus camera |
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| Publication Number | Publication Date |
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| CN102244736A CN102244736A (en) | 2011-11-16 |
| CN102244736B true CN102244736B (en) | 2013-11-13 |
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| CN2011101912909A Expired - Fee Related CN102244736B (en) | 2011-07-08 | 2011-07-08 | Focal length positioning method for fixed-focus camera |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9385324B2 (en) * | 2012-05-07 | 2016-07-05 | Samsung Electronics Co., Ltd. | Electronic system with augmented reality mechanism and method of operation thereof |
| CN112784819A (en) * | 2021-03-05 | 2021-05-11 | 上海钜星科技有限公司 | Method for increasing effective distance between face recognition and license plate recognition of police helmet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004215306A (en) * | 2004-03-08 | 2004-07-29 | Sharp Corp | Mobile picture communication terminal |
| CN1708712A (en) * | 2002-10-24 | 2005-12-14 | 夏普株式会社 | Focus state display |
| CN1768299A (en) * | 2003-02-07 | 2006-05-03 | 夏普株式会社 | Focused state display device and focused state display method |
| KR20100101219A (en) * | 2009-03-09 | 2010-09-17 | 주식회사 케이티테크 | Method for taking picture of portable terminal and portable terminal performing the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4193804B2 (en) * | 2005-02-03 | 2008-12-10 | カシオ計算機株式会社 | IMAGING DEVICE, IMAGE STORAGE DEVICE, IMAGING METHOD, STORAGE METHOD, AND PROGRAM |
| TWI342461B (en) * | 2006-12-11 | 2011-05-21 | Newsoft Technology Corp | System and method for assisting fixed-focus image-capturing device to focus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1708712A (en) * | 2002-10-24 | 2005-12-14 | 夏普株式会社 | Focus state display |
| CN1768299A (en) * | 2003-02-07 | 2006-05-03 | 夏普株式会社 | Focused state display device and focused state display method |
| JP2004215306A (en) * | 2004-03-08 | 2004-07-29 | Sharp Corp | Mobile picture communication terminal |
| KR20100101219A (en) * | 2009-03-09 | 2010-09-17 | 주식회사 케이티테크 | Method for taking picture of portable terminal and portable terminal performing the same |
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| CN102244736A (en) | 2011-11-16 |
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