CN102811319A - Image sensing-measuring device and image sensing-measuring method - Google Patents
Image sensing-measuring device and image sensing-measuring method Download PDFInfo
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- CN102811319A CN102811319A CN2011101589734A CN201110158973A CN102811319A CN 102811319 A CN102811319 A CN 102811319A CN 2011101589734 A CN2011101589734 A CN 2011101589734A CN 201110158973 A CN201110158973 A CN 201110158973A CN 102811319 A CN102811319 A CN 102811319A
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- output frequency
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- image sensing
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Abstract
The invention relates to an image sensing-measuring device and an image sensing-measuring method. The sensing device generates corresponding output frequencies and clock pulse signals according to the length of sensitizing time. When sensitizing time is long, a low output frequency can be decided, and an image signal can be timely output without the requirement of high-frequency output, so that the unnecessary energy waste is avoided, the image noises are reduced effectively, and further high image quality is obtained.
Description
Technical field
The invention relates to a kind of Image sensor apparatus and image sensing method, especially about a kind of can be according to the Image sensor apparatus of adjusting the image output frequency sensitive time and image sensing method.
Background technology
Comprise an Image sensor apparatus in the image capture units such as general known camera or scanner, behind the sensing image, sensing component exports sensing image in one buffer to an output frequency sensing component in its Image sensor apparatus in a sensitive time.Please refer to Fig. 1, Fig. 1 is the sequential chart of signal of video signal I of clock signal c and output of t sensitive time, the output frequency of a known Image sensor apparatus.In the general known Image sensor apparatus; The clock signal c of output frequency is a fixed value; With sensitive time length irrelevant; And can be in time the signal of video signal of sensing component institute sensing be exported in the buffer for making under different sensitive times all, mostly the pairing output frequency of clock signal c of output frequency is high-frequency.The output frequency of high frequency all exports signal of video signal to buffer before causing and far beginning early than next sensitization, cause unnecessary energy waste, and the image noise value that high-frequency caused is also bigger.
In sum, how to develop an Image sensor apparatus with effective reduction energy consumption and image noise and to obtain the preferable quality of image be the target that the present utmost point need be made great efforts.
Summary of the invention
The present invention provides a kind of Image sensor apparatus and image sensing method, can with effective reduction image noise, obtain the preferable quality of image according to adjusting the image output frequency sensitive time.
According to the Image sensor apparatus of one embodiment of the invention, it comprises a controller, a clock pulse generator and an image sensing component, and its middle controller determines one first sensitive time and corresponding first output frequency.Clock pulse generator electrically connects controller, and clock pulse generator produces the clock signal of one first output frequency according to first output frequency.Image sensing component electrically connects controller and clock pulse generator, and image sensing component is sensing image in first sensitive time, in order to producing a signal of video signal, and with the clock signal output image signal of first output frequency.
According to the image sensing method of another embodiment of the present invention, it comprises: light sensing in one first sensitive time, and produce a signal of video signal; Length according to first sensitive time produces corresponding one first output frequency; Produce the clock signal of one first output frequency according to first output frequency; With clock signal output image signal with first output frequency.
The present invention above-mentioned and other aspect, characteristic and advantage can be understood by the explanation of accompanying drawing and embodiment more.
Description of drawings
Fig. 1 is the sequential chart of the signal of video signal of the clock signal of sensitive time of showing a known Image sensor apparatus, output frequency and output.
Fig. 2 a is for showing the sketch map according to the Image sensor apparatus of one embodiment of the invention.
Fig. 2 b is for showing the sketch map according to the Image sensor apparatus of another embodiment of the present invention.
Fig. 3 is for showing first sensitive time, second sensitive time, the clock signal of first output frequency, the clock signal of second output frequency and the sequential chart of signal of video signal according to the Image sensor apparatus of embodiments of the invention.
Fig. 4 is for showing the flow chart according to the image sensing method of one embodiment of the invention.
The primary clustering symbol description:
11 controllers
12 clock pulse generators
13 image sensing components
14 photometry assemblies
The sensitive time of t known technology
t
1First sensitive time
t
2Second sensitive time
f
1First output frequency
The clock signal of the output frequency of c known technology
c
1The clock signal of first output frequency
c
2The clock signal of second output frequency
p
1First luminance parameter
I, I ' signal of video signal
The S1-S4 step
Embodiment
Please refer to Fig. 2 a, Fig. 2 a is for showing the sketch map according to the Image sensor apparatus of one embodiment of the invention, and it comprises a controller 11, a clock pulse generator 12 and an image sensing component 13.Controller 11 determine one first sensitive time t
1And corresponding first an output frequency f
1Frequency generator 12 electrically connects controller 11, and according to the first output frequency f
1Produce the clock signal c of one first output frequency
1Image sensing component 13 can be a Charged Coupled Device (Charge Coupled Device; CCD), CMOS (Complementary Metal Oxide Semiconductor; CMOS) transducer or contact image sensor (Contact Image Sensor; CIS), it electrically connects controller 11 and clock pulse generator 12.Image sensing component 13 in first sensitive time t
1Interior sensing image, in order to producing a signal of video signal I, and with the clock signal c of first output frequency
1Output image signal I.
Among one embodiment, first sensitive time t
1The intensity that is the signal of video signal that in a preset sensitive time, produced according to image sensing component 13 determines.For instance; Controller 11 control image sensing components 13 sensing image in a preset sensitive time; And export the signal of video signal that produces to controller 11, if the intensity of the signal of video signal that is produced in preset sensitive time surpasses a critical value, then controller 11 produce first sensitive time t
1Numerical value will be less than preset sensitive time.In another embodiment, shown in Fig. 2 b, Image sensor apparatus more comprises a photometry assembly 14, and it electrically connects controller 11, in order to sensing brightness and produce one first luminance parameter p
1To controller 11.Controller 11 is according to the first luminance parameter p
1Produce first sensitive time t
1In another embodiment, Image sensor apparatus more comprises a luminescence component, in order to light source to be provided, carries out image sensing so that enough light quantities to be provided, and wherein luminescence component can be a light-emitting diode or a cathode fluorescent tube.
Be noted that controller 11 is the output frequencies that produce correspondence according to the length of sensitive time.Please be simultaneously with reference to figure 3, Fig. 3 for show according to the Image sensor apparatus of embodiments of the invention first sensitive time t
1, second sensitive time t
2, first output frequency clock signal c
1, second output frequency clock signal c
2Sequential chart with signal of video signal I, I '.Controller 11 generations t one second sensitive time
2With one second output frequency (not indicating).In embodiment shown in Figure 3, second sensitive time t
2Greater than first sensitive time t
1, controller 11 according to second sensitive time t
2Second output frequency that produces (not indicating) is less than the first output frequency f
1Therefore the clock signal c of image sensing component 13 second output frequency that will produce with clock pulse generator 12
2Output image signal I '.Otherwise, when second sensitive time t
2Less than first sensitive time t
1, controller 11 according to second sensitive time t
2Second output frequency that produces (not indicating) is greater than the first output frequency f
1The clock signal c of second output frequency that image sensing component 13 promptly produces with clock pulse generator 12
2Output image signal I '.
Be noted that image sensing component 13 in first sensitive time t
1(second sensitive time t
2) in, the clock signal c of first output frequency
1(the clock signal c of second output frequency
2) each cycle the signal of corresponding output all have the data of signal of video signal I (I ').That is to say that when sensitive time is longer, controller 11 will determine a lower output frequency; Need not high frequency output just can in time signal of video signal be exported; Not only can avoid unnecessary energy waste, more can effectively reduce image noise, obtain the preferable quality of image.
Please also refer to Fig. 1 and Fig. 4, Fig. 4 is for showing the flow chart according to the image sensing method of one embodiment of the invention.At first, in first sensitive time t
1Interior light sensing, and produce signal of video signal I (S1); According to first sensitive time t
1Length produce the corresponding first output frequency f
1(S2); According to the first output frequency f
1Produce the clock signal c of first output frequency
1(S3); Then, image sensing component 13 is with the clock signal c of first output frequency
1Output image signal I (S4).Wherein, first sensitive time t
1Deciding means, as above-mentioned, be that the intensity of the signal of video signal that in a preset sensitive time, produced according to image sensing component 13 determines, or utilize the photometry assembly 14 among the embodiment of Fig. 2 b to carry out photometry, with determine first sensitive time t
1In addition, in an embodiment, more comprising provides a light source, carries out sensing so that enough light quantities to be provided.Being noted that in the image sensing method of the present invention, is output frequency and the clock signal that produces correspondence according to the length of sensitive time, and this Image sensor apparatus with the invention described above is identical, repeats no more at this.
Comprehensively above-mentioned; Image sensor apparatus of the present invention and image sensing method; Be to produce corresponding output frequency and clock signal, make the corresponding signal of exporting of each cycle institute of clock signal of different output frequencies all have the data of signal of video signal according to the length of sensitive time.When sensitive time is longer, can determine a lower output frequency, need not high frequency output just can not only can avoid unnecessary energy waste in time with signal of video signal output, more can effectively reduce image noise, obtain the preferable quality of image.
Above-described embodiment only is for technological thought of the present invention and characteristics are described; Its purpose makes the personage who has the knack of this skill can understand content of the present invention and is implementing according to this; When can not with qualification claim of the present invention; The equalization of promptly doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim of the present invention.
Claims (10)
1. Image sensor apparatus is characterized in that it comprises:
One controller, it determines one first sensitive time and corresponding first output frequency;
One clock pulse generator, it electrically connects this controller, and this clock pulse generator produces the clock signal of one first output frequency according to this first output frequency; And
One image sensing component, it electrically connects this controller and this clock pulse generator, and this image sensing component is sensing image in this first sensitive time, in order to producing a signal of video signal, and exports this signal of video signal with the clock signal of this first output frequency.
2. Image sensor apparatus as claimed in claim 1; It is characterized in that; This controller more determines one second sensitive time and one second output frequency, and this clock pulse generator is according to the clock signal of this this second output frequency of second output frequency generation, and this image sensing component is with this this signal of video signal of clock signal output of this second output frequency; Wherein this second sensitive time is greater than this first sensitive time, and this second output frequency is less than this first output frequency; Or this second sensitive time is less than this first sensitive time, and this second output frequency is greater than this first output frequency.
3. Image sensor apparatus as claimed in claim 1; It is characterized in that; More comprise a photometry assembly; It electrically connects this controller, and in order to sensing brightness and produce one first luminance parameter to this controller, this controller is according to this first luminance parameter this first sensitive time of decision and this first output frequency.
4. Image sensor apparatus as claimed in claim 1 is characterized in that this image sensing component comprises a Charged Coupled Device, CMOS semiconductor sensor or contact image sensor.
5. Image sensor apparatus as claimed in claim 1 is characterized in that, more comprises a luminescence component, in order to light source to be provided.
6. Image sensor apparatus as claimed in claim 5 is characterized in that, this luminescence component comprises a light-emitting diode or a cathode fluorescent tube.
7. an image sensing method is characterized in that, comprises:
Light sensing in one first sensitive time, and produce a signal of video signal;
Length according to this first sensitive time produces corresponding one first output frequency;
Produce the clock signal of one first output frequency according to this first output frequency; And
This signal of video signal of clock signal output with this first output frequency.
8. image sensing method as claimed in claim 7 is characterized in that, more comprises:
Light sensing in one second sensitive time, and produce this signal of video signal;
Length according to this second sensitive time produces corresponding one second output frequency; And
With this signal of video signal of this second output frequency output, wherein this second sensitive time is greater than this first sensitive time, and this second output frequency is less than this first output frequency; Or this second sensitive time is less than this first sensitive time, and this second output frequency is greater than this first output frequency.
9. image sensing method as claimed in claim 7 is characterized in that, be that the intensity that is pursuant to this signal of video signal that is produced in the preset sensitive time determines this first sensitive time.
10. image sensing method as claimed in claim 7 is characterized in that, more comprises the step that a light source is provided.
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| CN2011101589734A CN102811319A (en) | 2011-05-31 | 2011-05-31 | Image sensing-measuring device and image sensing-measuring method |
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| CN2011101589734A CN102811319A (en) | 2011-05-31 | 2011-05-31 | Image sensing-measuring device and image sensing-measuring method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200812364A (en) * | 2006-08-18 | 2008-03-01 | Premier Image Technology Corp | A digital image forming device and a digital image forming method |
| CN101204086A (en) * | 2005-06-21 | 2008-06-18 | 株式会社理光 | Imaging apparatus, imaging control method and recording medium readable by computer |
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- 2011-05-31 CN CN2011101589734A patent/CN102811319A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204086A (en) * | 2005-06-21 | 2008-06-18 | 株式会社理光 | Imaging apparatus, imaging control method and recording medium readable by computer |
| TW200812364A (en) * | 2006-08-18 | 2008-03-01 | Premier Image Technology Corp | A digital image forming device and a digital image forming method |
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Application publication date: 20121205 |