CN103679682A - System and method for finding image spots - Google Patents
System and method for finding image spots Download PDFInfo
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- CN103679682A CN103679682A CN201210329071.7A CN201210329071A CN103679682A CN 103679682 A CN103679682 A CN 103679682A CN 201210329071 A CN201210329071 A CN 201210329071A CN 103679682 A CN103679682 A CN 103679682A
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Abstract
The invention relates to a system for finding image spots. The system comprises an image capturing module, a brightness calculating module, a spot finding module and a storing module, wherein the image capturing module is used for capturing an image; the brightness calculating module is used for calculating the brightness values of a plurality of pixels in the image; the spot finding module is used for numbering the pixel values; all pixels not be scanned in the image are scanned in a first sequence, the serial number of the scanned pixels is stored in the storing module, and each pixel is scanned only once; the pixels of which the brightness is less than a preset brightness are marked as dots; all pixels not be scanned adjacent to the pixels marked as dots are further scanned in a second sequence, the pixels of which the brightness is less than the preset brightness are still marked as dots, and one after another until the brightness of all pixels adjacent to the pixels marked as dots is larger or equal to the preset brightness. The invention further relates to a method for finding the image spots.
Description
Technical field
The present invention relates to image processing techniques, relate in particular to a kind of image stain seeking system and method.
Background technology
In the assembling process of camera module, dust, chip may fall on the eyeglass of camera module or on optical filter, cause existing in photo that the camera module after assembling takes or video recording the stain of non-scene image.Therefore, conventionally need carry out stain to image captured after camera module group assembling and search, to guarantee the quality of camera module.Current method is manually to judge, but because people's the eyes work time grow, can produce fatigue, thereby has strengthened the probability of erroneous judgement, so the stain that how can carry out quickly and accurately image is searched and become problem demanding prompt solution.
Summary of the invention
In view of this, be necessary to provide a kind of stain seeking system of image accurately and rapidly and method.
An image stain seeking system, it comprises that an image collection module, a brightness calculation module, a stain search module and a memory module.This image collection module is used for obtaining an image, and this image comprises a plurality of pixels that array-like is arranged that are.The brightness of this brightness calculation module for calculating the plurality of pixel.This stain is searched module for the plurality of pixel is numbered.This stain is searched module memory and is contained a predetermined brightness value, and for all pixels not being scanned of specific this image of the first sequential scanning, and the numbering of the pixel being scanned is stored in this memory module, make in the process scanning, the pixel being scanned is directly skipped, until the plurality of pixel is only all scanned once; Then the brightness value and this predetermined brightness value that compare scanned pixel, the pixel that this brightness value is less than to this predetermined brightness value is labeled as stain.This stain is searched module and is further used for specific second sequential scanning this pixel that is marked as stain adjacent all pixels that are not scanned around, the numbering of the pixel being scanned is stored in this memory module, the brightness value and this predetermined brightness value that also compare this scanned pixel, and the pixel that this brightness value is less than this predetermined brightness value is labeled as to stain, recurrence successively, until the pixel that is marked as stain around the brightness value of adjacent all pixels be all more than or equal to this predetermined brightness value.
An image stain lookup method, it comprises the steps:
Take an image, this image comprises a plurality of pixels that array-like is arranged that are;
A plurality of pixels in this image are numbered;
Calculate the brightness value of each pixel in this image;
With all pixels not being scanned in a specific first sequential scanning image, and the numbering of the pixel being scanned is stored; In scanning process, if encountered the pixel being scanned, skip this pixel and do not scan, until each pixel is only scanned once.
Brightness value and this predetermined brightness value of the pixel relatively scanning, and the pixel that brightness value is less than this predetermined brightness value is labeled as to stain;
This pixel that is marked as stain adjacent all pixels that are not scanned around with specific second sequential scanning, and the numbering of the pixel being scanned is stored; In scanning process, if encountered the pixel being scanned, skip this pixel and do not scan;
If this pixel that the is marked as stain around brightness value of adjacent all pixels is all greater than this predetermined brightness value, get back to step " with all pixels not being scanned in a specific first sequential scanning image ";
If this pixel that is marked as stain around has the brightness value of at least one pixel to be less than this predetermined brightness value in adjacent these all pixels, to this at least one pixel around adjacent all pixels get back to step " brightness value and this predetermined brightness value of the pixel relatively scanning, and the pixel that brightness value is less than this predetermined brightness value is labeled as to stain ".
Compared to prior art, image stain seeking system of the present invention and method, the pixel that found brightness value is less than to predetermined brightness value is directly labeled as stain, and in the process of scanning, the numbering that had been scanned pixel is once stored in memory module simultaneously, each pixel is only scanned once, thereby effectively improves the speed of finding stain, to find fast the position at stain place.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the image stain seeking system that provides of better embodiment of the present invention.
Fig. 2 is the image stain seeking system of Fig. 1 schematic diagram to each pixel number.
Fig. 3 utilizes the image stain seeking system of Fig. 1 to carry out the process flow diagram of image stain lookup method.
Main element symbol description
| Image |
100 |
| |
10 |
| |
30 |
| Stain is searched |
50 |
| |
70 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 1, is a kind of image stain seeking system 100 that embodiment of the present invention provides, and it comprises that an image collection module 10, brightness calculation module 30, a stain search module 50 and a memory module 70.
This image collection module 10 is for obtaining an image.This image is that camera module (not shown) to be tested is captured.In the present embodiment, this image comprises a plurality of pixels that are rectangular arrangement.
This brightness calculation module 30 is for calculating the brightness value of this each pixel of image.
This stain is searched module 50 for the plurality of pixel is numbered according to the position at himself place.As shown in Figure 2, from left to right, the numbering of the pixel of the first row is respectively a10, a11, a12, a13, a14, a15, a16, a17, a18, a19; The numbering of the pixel of the second row is respectively a20, a21, a22, a23, a24, a25, a26, a27, a28, a29.
This stain is searched module 50 also for all pixels not being scanned of a specific first sequential scanning image, and the numbering of the pixel being scanned is stored in this memory module 70, make in the process scanning, the pixel being scanned is directly skipped, do not carry out rescan, until all pixels are only all scanned once.In the present embodiment, described first sequentially for scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning.
This stain is searched and in module 50, is stored a predetermined brightness value, also for brightness value and this predetermined brightness value of the pixel that relatively scans, and the pixel that brightness value is less than this predetermined brightness value is labeled as to stain.
This stain is searched module 50 and is further used for specific second sequential scanning this pixel that is marked as stain adjacent all pixels that are not scanned around, the numbering of the pixel being scanned is stored in this memory module 70, the brightness value and this predetermined brightness value that also compare scanned pixel, and the pixel that brightness value is less than this predetermined brightness value is labeled as to stain, recurrence successively, until the pixel that is marked as stain around the brightness value of adjacent all pixels be all more than or equal to this predetermined brightness value.In the present embodiment, described second sequentially for scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning.
If this stain search module 50 find out be marked as stain pixel around the adjacent brightness value that has more than one pixel be less than this predetermined brightness value, so according to scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning, first adjacent all pixels that are not scanned around the forward pixel in position are scanned, then around the pixel after position is leaned on, adjacent all pixels that are not scanned scan.
As shown in Figure 3, be a kind of image stain lookup method that embodiment of the present invention provides, it comprises the steps:
S1: obtain an image, this image comprises a plurality of pixels that array-like is arranged that are.
S2: a plurality of pixels in this image are numbered according to the position at himself place.
S3: the brightness value that calculates each pixel in this image.
S4: with all pixels not being scanned in a specific first sequential scanning image, and the numbering of the pixel being scanned is stored.In the present embodiment, described first sequentially for scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning.In scanning process, if encountered the pixel being scanned, skip this pixel and do not scan, until each pixel is only scanned once.
S5: in scanning process, brightness value and this predetermined brightness value of the pixel relatively scanning, and the pixel (such as P21) that brightness value is less than this predetermined brightness value is labeled as to stain.
S6: this pixel P21 that is marked as stain adjacent all pixels that are not scanned around with specific second sequential scanning, and the numbering of the pixel being scanned is stored.In the present embodiment, described second sequentially for scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning.In scanning process, if encountered the pixel being scanned, skip this pixel and do not scan.
S7: if except the pixel being skipped, this pixel P21 around brightness value of adjacent all pixels is greater than this predetermined brightness value, gets back to step S4.
S8: if this pixel P21 around has the brightness value of at least one pixel (such as P32) to be less than this predetermined brightness value in adjacent these all pixels, to this at least one pixel P32 adjacent all pixel repeating step S5 to S8 around.
If this pixel P21 is adjacent around, there is more than one pixel (such as P12, P32) brightness value is less than this predetermined brightness value, so according to scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning, first adjacent all pixels that are not scanned around the forward pixel P12 in position are scanned, then around the pixel P32 after position is leaned on, adjacent all pixels that are not scanned scan.
Image stain seeking system of the present invention and method, the pixel that found brightness value is less than to predetermined brightness value is directly labeled as stain, and in the process of scanning, the numbering that had been scanned pixel is once stored in memory module simultaneously, each pixel is only scanned once, thereby effectively improve the speed of finding stain, to find fast the position at stain place.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change and distortion all should belong to the protection domain of the claims in the present invention.
Claims (10)
1. an image stain seeking system, it comprises that an image collection module, a brightness calculation module, a stain search module and a memory module; This image collection module is used for obtaining an image, and this image comprises a plurality of pixels that array-like is arranged that are; The brightness of this brightness calculation module for calculating the plurality of pixel; This stain is searched module for the plurality of pixel is numbered; This stain is searched module memory and is contained a predetermined brightness value, and for all pixels not being scanned of specific this image of the first sequential scanning and the numbering of the pixel being scanned is stored in this memory module, make in the process scanning, the pixel being scanned is directly skipped, until the plurality of pixel is only all scanned once; This stain is searched module also for comparing brightness value and this predetermined brightness value of the pixel scanning, and the pixel that this brightness value is less than to this predetermined brightness value is labeled as stain; This stain is searched module and is further used for specific second sequential scanning this pixel that is marked as stain adjacent all pixels that are not scanned around, the numbering of the pixel being scanned is stored in this memory module, the brightness value and this predetermined brightness value that also compare this scanned pixel, and the pixel that this brightness value is less than this predetermined brightness value is labeled as to stain, recurrence successively, until can not find the pixel that brightness value is less than this predetermined brightness value in all associated pixels successively.
2. image stain seeking system as claimed in claim 1, is characterized in that, this stain is searched module and according to the position at the plurality of pixel place, the plurality of pixel is numbered.
3. image stain seeking system as claimed in claim 1, is characterized in that, this first order is for scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning.
4. image stain seeking system as claimed in claim 1, is characterized in that, this second order is for scanning every a line from top to bottom, the order of point by point scanning from left to right in scanning the process of every a line.
5. the image stain seeking system as described in claim 3 or 4, it is characterized in that, if this stain search module find out be marked as stain pixel around the adjacent brightness value that has more than one pixel be less than this predetermined brightness value, so according to scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning, first adjacent all pixels that are not scanned around the forward pixel in position are scanned, then around the pixel after position is leaned on, adjacent all pixels that are not scanned scan.
6. an image stain lookup method, it comprises the steps:
Take an image, this image comprises a plurality of pixels that array-like is arranged that are;
A plurality of pixels in this image are numbered;
Calculate the brightness value of each pixel in this image;
With all pixels not being scanned in a specific first sequential scanning image, and the numbering of the pixel being scanned is stored; In scanning process, if encountered the pixel being scanned, skip this pixel and do not scan, until each pixel is only scanned once;
Brightness value and this predetermined brightness value of the pixel relatively scanning, and the pixel that this brightness value is less than this predetermined brightness value is labeled as to stain;
This pixel that is marked as stain adjacent all pixels that are not scanned around with specific second sequential scanning, and the numbering of the pixel being scanned is stored; In scanning process, if encountered the pixel being scanned, skip this pixel and do not scan;
If except being skipped the pixel that does not carry out scanning, this pixel that the is marked as stain around brightness value of adjacent all pixels is all greater than this predetermined brightness value, gets back to step " with all pixels not being scanned in a specific first sequential scanning image ";
If this pixel that is marked as stain around has the brightness value of at least one pixel to be less than this predetermined brightness value in adjacent these all pixels, to this at least one pixel around adjacent all pixels get back to step " brightness value and this predetermined brightness value of the pixel relatively scanning, and the pixel that brightness value is less than this predetermined brightness value is labeled as to stain ".
7. image stain lookup method as claimed in claim 6, is characterized in that, the plurality of pixel is numbered by the position according to himself place.
8. image stain lookup method as claimed in claim 6, is characterized in that, this first order is for scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning.
9. image stain lookup method as claimed in claim 6, is characterized in that, this second order is served as reasons and scanned every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning.
10. image stain lookup method as claimed in claim 8 or 9, it is characterized in that, if this pixel that the is marked as stain around adjacent brightness value that has more than one pixel is less than this predetermined brightness value, so according to scanning every a line from top to bottom, the order of point by point scanning from left to right in the process of the every a line of scanning, first adjacent all pixels that are not scanned around the forward pixel in position are scanned, then around the pixel after position is leaned on, adjacent all pixels that are not scanned scan.
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| CN104349161A (en) * | 2014-09-17 | 2015-02-11 | 常熟实盈光学科技有限公司 | Image smudge judgment method of camera module |
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