CN100417203C - Sensing device and method for sampling image signal - Google Patents
Sensing device and method for sampling image signal Download PDFInfo
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- CN100417203C CN100417203C CNB2004100433894A CN200410043389A CN100417203C CN 100417203 C CN100417203 C CN 100417203C CN B2004100433894 A CNB2004100433894 A CN B2004100433894A CN 200410043389 A CN200410043389 A CN 200410043389A CN 100417203 C CN100417203 C CN 100417203C
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Abstract
The present invention relates to a sensing device which has a plurality of image sensing cells which can be arranged into a sensing cell array according to an array mode. The signal sampling method of the present invention is characterized in that the sensing cells are divided into multiple sensing cell groups at first, and then each sensing cell group is used as a unit to respectively sample image signals for each sensing cell group. Consequently, during the subsequent image processing, a buffer or a memory with large capacity is not needed, and the speed of the subsequent image processing can be quickened to save the desired time of the subsequent image processing.
Description
Technical field
The invention relates to a kind of signal sampling method, and particularly most image sensing born of the same parents (Scene Sensor Cell) are distinguished into the signal sampling method that several sensings born of the same parents group is distinctly taken a sample again relevant for a kind of.
Background technology
Typical digital camera can use usually one for example the image sensing element of CCD come retrieving images.This image sensing element can comprise the two-dimensional array of being made up of several image sensings born of the same parents usually, is called sensing born of the same parents array at this.Each image sensing born of the same parents on sensing born of the same parents array can retrieve the image of its position, and image transitions can be become electronic signal to use so that subsequent image processing to be provided.
Fig. 1 is the picture signal sampling schematic diagram that illustrates a kind of existing sensing born of the same parents array.Please refer to Fig. 1, sensing born of the same parents array (Sensor Cell Array) the 10th is made up of with array way most individual for example image sensing born of the same parents of 11.The existing method that the picture signal of sensing born of the same parents array 10 is taken a sample comprises following several mode:
1. by 11 of image sensing born of the same parents, one by one (Cell-by-cell) and in regular turn the electronic signal of its storage is taken a sample by row ground (Row-by-row).
2. by 11 of image sensing born of the same parents, one by one and line by line (Column-by-Column) takes a sample to the electronic signal of its storage in regular turn.
3. by 11 of image sensing born of the same parents, one by one earlier the image sensing born of the same parents of odd column/row are carried out the picture signal sampling, and then to coupling ordered series of numbers/row the image sensing born of the same parents carry out picture signal and take a sample.
More than be to enumerate several existing signal sampling methods.In general, after the image that sensing born of the same parents array is retrieved carries out the picture signal sampling, usually need to carry out the action of image processing.When carrying out image processing,, carry out image processing again after the image segmentation of being retrieved can being become several image-regions because once can't handle too jumbo data.Therefore, suppose that a digital camera will use existing signal sampling method sensing born of the same parents array is carried out picture signal when sampling, the buffer area or the memory that then need a big storage volume, earlier with the image storage of being retrieved, and then an image that is stored in buffer area or the memory is cut apart, this slow and required time that just makes the speed of image processing become becomes very long, and also because need jumbo buffer area or memory, therefore can allow cost increase.
Summary of the invention
Therefore, purpose of the present invention is providing a kind of signal sampling method exactly, behind image sensing born of the same parents retrieving images, can directly carry out image processing.
A further object of the present invention provides a kind of sensing apparatus, and being does not need too big buffer area or memory, can carry out image processing.
For reaching above-mentioned and other purposes, the invention provides a kind of signal sampling method, can once carry out the picture signal sampling to several image sensings born of the same parents.Signal sampling method of the present invention is as described below: at first with these image sensings born of the same parents, be distinguished into many sensing born of the same parents groups (group), respectively these sensings born of the same parents group carried out the picture signal sampling again.
In one embodiment of this invention, the order of these sensings born of the same parents group when carrying out the picture signal sampling is that the specification of the image processing after taking a sample according to picture signal determines.
In addition, the size of each sensing born of the same parents group can be just the same, also can be different, and equally also be that the specification of the image processing after taking a sample according to picture signal determines.
And to the order that the image sensing born of the same parents in these sensings born of the same parents group carry out the picture signal sampling, be that the specification of the image processing after taking a sample according to picture signal determines.Therefore, the method for these sensings born of the same parents being carried out the picture signal sampling can be identical, also can be inequality.
And in general, these image sensings born of the same parents become sensing born of the same parents array according to arranged in array mode.
From another viewpoint, the invention provides a kind of sensing apparatus, comprised many image sensing born of the same parents, and these image sensings born of the same parents are distinguished into several sensings born of the same parents group, the present invention is to be unit with each sensing born of the same parents group, carries out the picture signal sampling respectively.In addition, the present invention also comprises logic control circuit and analog-digital converter.Wherein, logic control circuit couples these image sensings born of the same parents' output, and to receive the picture signal sampling, analog-digital converter then couples the output of logic control circuit.
In sum, the present invention carries out the image sensing born of the same parents before the picture signal sampling, is earlier the image sensing born of the same parents to be distinguished into many sensing born of the same parents groups.Therefore needn't cut apart the image of retrieval again, and can directly carry out image processing, and promote the speed of image processing effectively.
In one embodiment of this invention, each image sensing born of the same parents comprises first color detection units, second color detection units and the 3rd color detection units.
Also get specification according to image processing the image sensing born of the same parents are distinguished into many sensing born of the same parents groups, and carry out the picture signal sampling because of the present invention.Therefore the present invention does not need the too big buffer area of capacity promptly can carry out subsequent image processing, so can save cost.
Description of drawings
Fig. 1 is the picture signal sampling schematic diagram that illustrates existing sensing born of the same parents array.
Fig. 2 A is the sensing apparatus calcspar that illustrates according to one embodiment of the invention.
Fig. 2 B is the sensing born of the same parents array schematic diagram that illustrates according to one embodiment of the invention.
Fig. 2 C is the sensing born of the same parents array schematic diagram that illustrates according to one embodiment of the invention.
Fig. 3 is the signal sampling method flow chart that illustrates according to second embodiment of the invention.
Fig. 4 A and Fig. 4 B are the signal sampling method flow charts that illustrates according to the third embodiment of the present invention.
Embodiment
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, several embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Fig. 2 A is the sensing apparatus calcspar that illustrates according to one embodiment of the invention.Please refer to Fig. 2 A, in sensing apparatus of the present invention (for example CMOS/CCD sensor), comprised many for example image sensing born of the same parents of 214, and each image sensing born of the same parents 214 can (but not limiting) have first color detection units, second color detection units and the 3rd color detection units.Or each image sensing born of the same parents of 214 214 itself is a monochromatic light detecting unit, and this monochromatic light detecting unit can be, for example a red light detecting unit, a green light detecting unit, or a blue light detecting unit.And these image sensings born of the same parents' output all is coupled to Digital Logical Circuits 230.After these image sensings born of the same parents being carried out the picture signal sampling, be to see through Digital Logical Circuits 230, deliver to analog/digital converter 250 again.And analog/digital converter 250 be will simulation image transitions become the data of numeral after, export by its output Output.
Fig. 2 B is the sensing born of the same parents array schematic diagram that illustrates according to one embodiment of the invention.In general, above-mentioned image sensing born of the same parents can illustrate as Fig. 2 B, are arranged in sensing born of the same parents array 210 according to array way.And in the present invention, be that these image sensings born of the same parents are distinguished into many sensing born of the same parents groups.For example in the present embodiment, be that all image sensing born of the same parents are distinguished into for example sensing born of the same parents group of sensing sporozoite array 212.And the present invention is a unit with each sensing born of the same parents group exactly, carries out the picture signal sampling respectively.
Though be to represent sensing born of the same parents group with sensing sporozoite array 212 in Fig. 2 B, right and wrong are in order to limit the present invention.The size of each the sensing born of the same parents group in the present invention is to decide according to the specification of the image sensing born of the same parents being carried out the image processing after picture signal is taken a sample, and has the knack of the size that this skill person can decide sensing born of the same parents group according to the situation of reality.
Fig. 2 C is the sensing born of the same parents array schematic diagram that illustrates according to one embodiment of the invention.In the present invention, not limiting the image sensing born of the same parents is with arranged in array mode.In one embodiment of this invention, the image sensing born of the same parents can be arranged in, for example the arrangement mode shown in Fig. 2 C.The image sensing born of the same parents are divided into most sensing born of the same parents groups to carry out the method for picture signal sampling, can determine, do not limited at this according to the specification of the image processing after the picture signal sampling.
In addition, when these sensings born of the same parents group being carried out the picture signal sampling, image sensing born of the same parents in each sensing born of the same parents group are carried out the method and order of picture signal sampling, can be identical, also can be all inequality, be to decide according to the specification that the image sensing born of the same parents carry out the image processing after the picture signal sampling.
Please continue the B with reference to Fig. 2, the sensing sporozoite array 212 with 3 * 3 is that example illustrates.When beginning that the image sensing born of the same parents in the sensing born of the same parents array 210 are carried out picture signal when sampling, suppose that (but not limiting with this) at first take a sample to sensing sporozoite array 212.When to 212 samplings of sensing sporozoite array, and can begin to carry out the picture signal sampling to image sensing born of the same parents 214 earlier, one by one be sampled to image sensing born of the same parents 216 according to order then.All image sensing born of the same parents finish the picture signal sampling in sensing sporozoite array 212, just can take a sample to next sensing sporozoite array again.Though in the present embodiment, the image sensing born of the same parents in the sensing sporozoite array 212 are the modes of one by one taking a sample with according to order, do not limit the present invention with this, and haveing the knack of this skill person can change according to the needs of reality, does not influence spirit of the present invention.
Again, the present invention is to the picture signal sampling of sensing born of the same parents group order, and still the specification of carrying out the image processing after the picture signal sampling with the image sensing born of the same parents decides.Below provide several the present invention carry out the picture signal sampling to sensing born of the same parents group order.Haveing the knack of this skill person and can understand spirit of the present invention for asking to make hereinafter, is that the sensing born of the same parents array 210 that is illustrated with Fig. 3 is the example introduction, has the knack of this skill person when knowing, is not to limit the present invention with this.In addition, hereinafter, when the row of mentioning sensing born of the same parents (son) array/line number, represent the number of sensing born of the same parents (son) array each row/row epigraph sensing born of the same parents.Therefore in the narration hereinafter, when not doing special explanation.
First embodiment
Please continue the B with reference to Fig. 2, sensing apparatus of the present invention is during to sensing born of the same parents array 210 sampling, in order one by one (Array-by-array) and take a sample by the picture signal of carrying out of row/row.
Second embodiment
Fig. 3 is the signal sampling method flow chart that illustrates according to second embodiment of the invention.Please merge with reference to Fig. 2 B and Fig. 3, the represented signal sampling method of Fig. 3 wherein, be according to order one by one earlier the sensing sporozoite array from the odd column of sensing born of the same parents array 210 carry out the picture signal sampling, and then according to order one by one the sensing sporozoite array from the even column of sensing born of the same parents array 210 carry out the picture signal sampling.
Suppose:
Suppose that sensing born of the same parents array 210 is arrays of a M * N, wherein M and N are positive integers, are row and the row that is used for representing sensing born of the same parents array 210 respectively.Definition of T ij is expressed as the sensing sporozoite array of the capable j row of i on the sensing born of the same parents array 210 in addition, and for example sensing sporozoite array 212 is to represent with T11.And be that to ask following narration be the spirit that can clearly show present embodiment, therefore suppose that again each sensing sporozoite array is the array of X * Y, wherein X is greater than 1 positive integer less than M, it is the line number of each sensing sporozoite array of expression, and Y is greater than 1 positive integer less than N, be the columns of each sensing sporozoite array of expression, and when sensing born of the same parents array 210 being carried out the picture signal sampling, T11 is first sampled sensing sporozoite array.
Implementing procedure:
Present embodiment please continue with reference to Fig. 2 B and Fig. 3 in more detail, at first as described in the step S401, T11 is carried out the picture signal sampling.Then carry out step S403, subscript i is fixed and subscript j is added 1, and, judge that whether subscript j is greater than N/Y as described in the step S405.If subscript j is smaller or equal to N/Y (being exactly the "No" that step S405 is indicated),, Tij is carried out picture signal sampling, repeating step S403 then then as described in the step S409.If subscript j then carries out step S407 greater than N/Y (being exactly the "Yes" that step S405 is indicated), subscript i is added 1 and make that subscript j is 1, whether judge subscript i then greater than M/X, just as described in the step S411.If subscript i is smaller or equal to M/X (being exactly the "No" that step S411 is indicated), then repeating step S409.If subscript i greater than M/X, then carries out step S413, judge whether that all sensing sporozoite arrays all carried out the picture signal sampling, if there be not (being exactly the "No" that step S413 is indicated), then, T21 is carried out picture signal sampling, repeating step S403 then as described in the step S415.If all sensing sporozoite arrays all carried out picture signal sampling (being exactly the "Yes" that step S413 is indicated), then finish this time the picture signal of sensing born of the same parents array 210 to be taken a sample.
The 3rd embodiment
Fig. 4 A and Fig. 4 B are the signal sampling method flow charts that illustrates according to the third embodiment of the present invention.Please merge with reference to Fig. 2 B, Fig. 4 A and Fig. 4 B, at the represented signal sampling method of present embodiment, be the sensing sporozoite array with first sampling, and label is the first sensing sporozoite array.Be that the sensing sporozoite array of odd number carries out the picture signal sampling earlier according to order then, next according to order the sensing sporozoite array of numbering even number carried out the picture signal sampling again label.
Suppose:
The hypothesis of present embodiment is identical with second embodiment, please seldom give unnecessary details at this directly with reference to the hypothesis of second embodiment.
Implementing procedure:
Present embodiment at length at first as described in the step S501, carries out the picture signal sampling to T11.Then as described in the step S503, subscript i is fixed and subscript j is added 2, and, judge that whether subscript j is greater than N/Y as described in the step S505.If subscript j is smaller or equal to N/Y (being exactly the "No" that step S505 is indicated),, Tij is carried out picture signal sampling, repeating step S503 then then as described in the step S507.If subscript j then carries out step S509 greater than N/Y (being exactly the "Yes" that step S505 is indicated), subscript i is added 1 and make that subscript j is 1, whether judge subscript i then greater than M/X, just as described in the step S511.If subscript i is smaller or equal to M/X (being exactly the "No" that step S511 is indicated), then repeating step S507.
Please continue with reference to Fig. 2 B, Fig. 4 A and Fig. 4 B,, T12 be carried out the picture signal sampling if subscript i then carries out step S513 greater than M/X (being exactly the "Yes" that step S511 is indicated).Then as described in the step S515, subscript i is fixed and subscript j is added 2, as described in the step S517, judge that whether subscript j is greater than N/Y then.If subscript j is smaller or equal to N/Y (being exactly the "No" that step S517 is indicated),, Tij is carried out picture signal sampling, repeating step S515 then then as described in the step S519.If subscript j then carries out step S521 greater than N/Y (being exactly the "Yes" that step S517 is indicated), subscript i is added 1 and make that subscript j is 2, whether judge subscript i then greater than M/X, be exactly step S523.If subscript i is smaller or equal to M/X (being exactly the "No" that step S523 is indicated), then repeating step S519.If subscript i is greater than M/X (being exactly the "Yes" that step S523 is indicated), then finish this time the picture signal of sensing born of the same parents array 210 to be taken a sample.
In sum, the present invention has following advantage at least.At first, the present invention is that unit carries out the picture signal sampling with sensing born of the same parents group, equal at the very start the image of retrieval to be done to cut apart, therefore when carrying out subsequent image processing, just do not need jumbo buffer area or memory to store the picture of retrieval in advance, therefore can effectively reduce cost.Secondly, because the present invention equals at the very start the image of retrieval to be done to cut apart, therefore when carrying out the successive image processing, just do not need to lose time the image of retrieval is done to cut apart, handle the required time and can save successive image, and accelerate the speed that successive image is handled.In addition, though the present invention is that unit carries out the picture signal sampling with sensing born of the same parents group, the speed that is stored in the average attenuation of the electric charge in the image sensing born of the same parents but can not change, and therefore quality of the present invention can't descend.
Though the present invention announces as above with several embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the accompanying Claim scope person of defining.
Claims (21)
1. a signal sampling method is suitable for most image sensing born of the same parents are carried out the picture signal sampling, it is characterized in that comprising:
With a described majority image sensing born of the same parents, be distinguished into most sensing born of the same parents groups; And
Respectively a described majority sensing born of the same parents group is carried out the picture signal sampling.
2. signal sampling method as claimed in claim 1 is characterized in that: wherein the method that a described majority sensing born of the same parents group is carried out picture signal sampling is that a specification according to the image processing after the picture signal sampling determines.
3. signal sampling method as claimed in claim 1 is characterized in that: wherein each described sensing born of the same parents group is big or small identical.
4. signal sampling method as claimed in claim 1 is characterized in that: wherein each described sensing born of the same parents group varies in size.
5. signal sampling method as claimed in claim 1 is characterized in that: wherein the method that the described majority image sensing born of the same parents in the described majority sensing born of the same parents group are carried out picture signal sampling is that a specification according to the image processing after the picture signal sampling determines.
6. signal sampling method as claimed in claim 5 is characterized in that: wherein in each described sensing born of the same parents group, the method for a described majority image sensing born of the same parents being carried out the picture signal sampling is all identical.
7. signal sampling method as claimed in claim 5 is characterized in that: wherein in each described sensing born of the same parents group, and the method difference of a described majority image sensing born of the same parents being carried out the picture signal sampling.
8. signal sampling method as claimed in claim 1 is characterized in that: a wherein said majority image sensing born of the same parents become a sensing born of the same parents array according to arranged in array mode.
9. signal sampling method as claimed in claim 8 is characterized in that: more comprise according to order one by one and by row/row the described majority sensing born of the same parents group of this sensing born of the same parents array carried out picture signal take a sample.
10. sensing apparatus is characterized in that comprising:
Most image sensing born of the same parents are distinguished into most sensing born of the same parents groups, and this sensing apparatus is to be unit to each described sensing born of the same parents group, carries out picture signal sampling respectively;
One logic control circuit couples a described majority image sensing born of the same parents's output, in order to receive this picture signal sampling; And
One analog-digital converter couples the output of this logic control circuit.
11. sensing apparatus as claimed in claim 10 is characterized in that: wherein the method that a described majority sensing born of the same parents group is carried out picture signal sampling is that a specification according to the image processing after the picture signal sampling determines.
12. sensing apparatus as claimed in claim 10 is characterized in that: wherein each described sensing born of the same parents group is big or small identical.
13. sensing apparatus as claimed in claim 10 is characterized in that: wherein each described sensing born of the same parents group varies in size.
14. sensing apparatus as claimed in claim 10 is characterized in that: wherein the method that the described majority image sensing born of the same parents in the described majority sensing born of the same parents group are carried out picture signal sampling is that a specification according to the image processing after the picture signal sampling determines.
15. sensing apparatus as claimed in claim 14 is characterized in that: wherein in each described sensing born of the same parents group, the method for a described majority image sensing born of the same parents being carried out the picture signal sampling is all identical.
16. sensing apparatus as claimed in claim 14 is characterized in that: wherein in each described sensing born of the same parents group, the method difference of a described majority image sensing born of the same parents being carried out the picture signal sampling.
17. sensing apparatus as claimed in claim 10 is characterized in that: a wherein said majority image sensing born of the same parents become a sensing born of the same parents array according to arranged in array mode.
18. sensing apparatus as claimed in claim 17 is characterized in that: also comprise according to order one by one and by row/row the described majority sensing born of the same parents group of this sensing born of the same parents array carried out picture signal take a sample.
19. sensing apparatus as claimed in claim 10 is characterized in that: wherein each described image sensing born of the same parents comprises one first color detection units, one second color detection units and one the 3rd color detection units.
20. sensing apparatus as claimed in claim 10 is characterized in that: wherein this sensing apparatus is the semi-conductive sensing apparatus of a complementary metal oxide.
21. sensing apparatus as claimed in claim 10 is characterized in that: wherein this sensing apparatus is the sensing apparatus of a Charged Coupled Device.
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| CN1115148A (en) * | 1994-01-24 | 1996-01-17 | 夏普公司 | An apparatus of digitally recording and reproducing video signals |
| US6532306B1 (en) * | 1996-05-28 | 2003-03-11 | Matsushita Electric Industrial Co., Ltd. | Image predictive coding method |
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| CN1115148A (en) * | 1994-01-24 | 1996-01-17 | 夏普公司 | An apparatus of digitally recording and reproducing video signals |
| US6532306B1 (en) * | 1996-05-28 | 2003-03-11 | Matsushita Electric Industrial Co., Ltd. | Image predictive coding method |
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