CN102088563A - Self-adaptive frame rate regulating and controlling method for optical images and optical video equipment - Google Patents
Self-adaptive frame rate regulating and controlling method for optical images and optical video equipment Download PDFInfo
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- CN102088563A CN102088563A CN 201010560869 CN201010560869A CN102088563A CN 102088563 A CN102088563 A CN 102088563A CN 201010560869 CN201010560869 CN 201010560869 CN 201010560869 A CN201010560869 A CN 201010560869A CN 102088563 A CN102088563 A CN 102088563A
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Abstract
The invention relates to a self-adaptive frame rate regulating and controlling method for optical images and optical video equipment, comprising the following steps: a, providing an optical image system which is composed of an image sensor and an image processor; b, using Ti to represent the time required for the image sensor to transmit image data to the image processor; c, using Tp to represent the time required for the image processor to process the corresponding image data; d, using Te to represent the time required for the image sensor to expose the image data of next frame; e, when Te is more than Tp, ensuring that T is equal to Ti plus Te; when Te is less than Tp, ensuring that T is equal to Ti plus Tp, wherein T represents the period for the image sensor and the image processor to process the image data of the current frame; obtaining the period T of the current frame by the image processor based on the calculation, and setting starting conditions for the image data of the next frame; and f, jumping to execute the step b until the optical image system finishes work. The method provided by the invention is simple in technological operation, improves the positioning resolution ratio and video fluency, and has the advantage of high adaptability.
Description
Technical field
The present invention relates to the image pickup method of a kind of image pointing device and optical video equipment, especially a kind of optical imagery and optical video equipment self adaptation frame per second regulate and control method of being used for belongs to the technical field of image processing.
Background technology
At present, the acquisition to image in optical imagery and the optical video is had two kinds of processing methods: the one, frame per second immobilizes, the 2nd, arrange several grades, frame per second on these several grades according to the saltus step between shelves of certain parameter.
But above-mentioned two kinds of methods have following shortcoming: 1, lack flexibility, signal acquisition is untimely; Generally speaking, the time for exposure Te of imageing sensor is adjustable, and image processing Tp operation time of image processor changes at any time according to current amount of calculation, and prior art does not make full use of this point; 2, positioning resolution and video fluency have been reduced; 3, the unreasonable meeting of stepping causes exposing under the dark background insufficient.Thereby existing method to capturing images can not guarantee the accurate positioning degree of pointing device and the fluency of video.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of optical imagery and optical video equipment self adaptation frame per second regulate and control method of being used for is provided, its technological operation is simple, has improved the fluency of positioning resolution and video, and adaptability is strong.
According to technical scheme provided by the invention, describedly be used for optical imagery and optical video equipment self adaptation frame per second regulate and control method comprises the steps:
A, provide the optical imagery system that comprises that imageing sensor and image processor constitute, and the described optical imagery of initialization system; B, imageing sensor acquisition of image data, and with the image data transmission of gathering to image processor, wherein, imageing sensor with image data transmission to the used time of image processor be Ti; C, described image processor receive and handle imageing sensor image transmitted data, and it is Tp that image processor is handled the required time of respective image data; D, when image processor begins to handle imageing sensor transmission respective image data, imageing sensor exposes for induction next frame image, wherein, imageing sensor is Te for gathering the next frame required time for exposure of view data; E, image processor relatively obtain the relation of above-mentioned time for exposure Te and view data processing time Tp; As Te〉during Tp, make T=Ti+Te; When Te＜Tp, make T=Ti+Tp; Wherein, T is the cycle that imageing sensor and image processor are handled the current frame image data; Image processor is provided with the entry condition of next frame view data according to calculating current frame period T, makes imageing sensor and image processor in time to transmit and computing the next frame image; F, redirect execution in step b finish until the optical imagery system works.
Among the described step e, image processor obtains current frame period T, and with described current frame period T during with initialization predefined greatest frame period Tmax compare; As T〉during Tmax, image processor makes T=Tmax.
Among the described step e, image processor obtains current frame period T, and with described current frame period T during with initialization predefined minimum frame period T min compare; When T＜Tmin, image processor makes T=Tmin.
Among the described step e, image processor obtains current frame period T, and with described current frame period T during with initialization predefined greatest frame period Tmax compare; As T〉during Tmax, image processor makes T=Tmax; At this moment, again with the current frame period T that obtains during with the image processor initialization predefined minimum frame period T min compare, when T＜Tmin, image processor makes T=Tmin.
Advantage of the present invention: by the imageing sensor images acquired, image processor is handled the imageing sensor image transmitted, image processor is according to the required processing time Tp of current frame image data and the relation of gathering next frame image exposure required time Te, automatically adjust the frame period of image, thereby determine the opening time point of next frame view data, make imageing sensor can in time transmit the next frame view data to image processor, image processor can be handled the view data of reception, flexibility strengthens, can carry out images acquired according to the bright degree of the background of images acquired, improved the identifiability of image, improved the fluency of positioning resolution and video, adaptability is strong.
Description of drawings
Fig. 1 is an idiographic flow block diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
When using the imageing sensor images acquired, when the bright degree of required images acquired background not simultaneously, the asynchronism(-nization) of imageing sensor required exposure; Usually, the image that background is dark, the time that imageing sensor exposed will be longer than the brighter image of background.Therefore, when the frame per second of imageing sensor and image processor employing setting is gathered and handled image,, can reduce the fluency of positioning resolution and video owing to the bright difference of image background; Simultaneously, may cause image exposure insufficient, influence the effect of IMAQ.
As shown in Figure 1: for resolution and the depth of exposure that guarantees IMAQ, self adaptation frame per second regulate and control method of the present invention comprises the steps:
A, provide the optical imagery system that comprises that imageing sensor and image processor constitute, and the described optical imagery of initialization system; Wherein, imageing sensor is used to gather required image, and image processor is used to receive imageing sensor and gathers the image transmitted data, and carries out corresponding necessary processing; Imageing sensor and image processor are IMAQ commonly used and image processing equipment;
B, imageing sensor acquisition of image data, and with the image data transmission of gathering to image processor, wherein, imageing sensor with image data transmission to the used time of image processor be Ti; Imageing sensor when receiving enabling signal, the image that beginning collects to image processor transmission, promptly during start=1 described in the figure, imageing sensor begins to the image processor transmit image data; The time that whole transmission course need be used is Ti;
C, described image processor receive and handle imageing sensor image transmitted data, and it is Tp that image processor is handled the required time of respective image data;
D, when image processor begins to handle imageing sensor transmission respective image data, imageing sensor exposes for induction next frame image, wherein, imageing sensor is Te for gathering the next frame required time for exposure of view data;
E, image processor relatively obtain the relation of above-mentioned time for exposure Te and view data processing time Tp; As Te〉during Tp, make T=Ti+Te; When Te＜Tp, make T=Ti+Tp; Wherein, T is the cycle that imageing sensor and image processor are handled the current frame image data; Image processor is provided with the entry condition (when being start=1) of next frame view data according to calculating current frame period T, makes imageing sensor and image processor in time to transmit and computing the next frame image;
After imageing sensor was transferred to image processor with images acquired, imageing sensor began to gather the next frame view data, i.e. the start time of next frame image exposuring time Te; When imageing sensor began to collection next frame image exposure, image processor began imageing sensor image transmitted data are handled; As Te〉during Tp, then the key diagram image-position sensor is handled the time of current frame image data for gathering the next frame image exposuring time greater than image processor, in order to determine the next frame image data transmission to image processor, image processor makes T=Ti+Te, promptly obtains the starting point of next frame image transmission; When Te＜Tp, then the key diagram image-position sensor is when collecting the next frame image, image processor is not also finished the previous frame treatment of picture, image processor makes T=Ti+Tp, guaranteed the processing of image processor to the current frame image data, provide simultaneously the start time of next frame image transmission again, be i.e. the finish time of frame period T, guarantee the fluency that whole optics picture system is operated;
Because the time of imageing sensor exposure is different with the bright degree of image background and adjacent image between dependency relation, therefore in order to guarantee the positioning resolution of image, when gathering the next frame image, allow present frame T that level of freedom is arranged, can guarantee imageing sensor and image processor resolution to image processing, the adequacy of view data exposure be can guarantee, and the continuity and the fluency of optical imagery system operation improved;
F, redirect execution in step b finish until the optical imagery system works; For the accuracy of locating and the fluency of video, need imageing sensor to need repeating step b-e, from step e as can be known, the whole operation process all is according to the frame period T that obtains, adjust the start time point of next frame image manipulation, and the frame period is done corresponding change according to the concrete operations situation of every two field picture, guarantees operating continuity such as whole transmission, image processing and collection, guarantees the positioning resolution of image.
When imageing sensor and image processor initialization, image processor is for the ease of gathering and handled image setting greatest frame period Tmax and minimum frame period T min.In order to guarantee that image processor handles the flexibility of image, the frame period T, the greatest frame period Tmax that obtain and the relation of minimum frame period T min need be adjusted setting.
When image processor only is provided with greatest frame period Tmax, the size of the greatest frame period Tmax that is provided with when frame period T that image processor need relatively obtain and initialization.As T〉during Tmax, then make T=Tmax; Be that image processor is got the smaller value between frame period T and greatest frame period Tmax, the abundant exposure when guaranteeing image sensing is the positioning resolution of reduction image within reason simultaneously, improves the fluency of optical imagery system handles simultaneously.When image processor only is provided with minimum frame period T min, the size of frame period T that image processor need relatively obtain and minimum frame period T min.When T＜Tmin, then make T=Tmin, promptly image processor is got the higher value between frame period T and minimum frame period T min, guarantees that image processor can finish image processing work; And reduced power requirement to image processing.When image processor not only was provided with greatest frame period Tmax but also is provided with minimum frame period T min, image processor needed earlier the relatively relation between frame period T and greatest frame period Tmax; As frame period T〉during Tmax, image processor makes frame period T=Tmax; Then image processor with the frame period T that relatively obtains and minimum frame period T min relatively, when T＜Tmin, image processor makes T=Tmin; Thereby when image processor is provided with greatest frame period Tmax or minimum frame period T min, image processor can be adjusted the frame period T that initially obtains, guarantee in time to start next time working of imageing sensor and image processor, need not to wait for, guaranteed image resolution ratio, make that simultaneously image exposure is more abundant, make that image can be high-visible, for the work accuracy and the stability of image processor provides the foundation.Guarantee the accurate positioning degree of positioner, this kind self adaptation frame per second regulate and control method can be used in the capturing images of optical video equipment equally, guarantees the fluency of video.
The present invention is by the imageing sensor images acquired, image processor is handled the imageing sensor image transmitted, image processor is according to the required processing time Tp of current frame image data and the relation of gathering next frame image exposure required time Te, automatically adjust the frame period of image, thereby determine the opening time point of next frame view data, make imageing sensor can in time transmit the next frame view data to image processor, image processor can be handled the view data of reception, flexibility strengthens, can carry out images acquired according to the bright degree of the background of images acquired, improved the identifiability of image, improved the fluency of positioning resolution and video, adaptability is strong.
Claims (4)
1. one kind is used for optical imagery and optical video equipment self adaptation frame per second regulate and control method, it is characterized in that described self adaptation frame per second regulate and control method comprises the steps:
(a), provide the optical imagery system that comprises that imageing sensor and image processor constitute, and the described optical imagery of initialization system;
(b), the imageing sensor acquisition of image data, and with the image data transmission of gathering to image processor, wherein, imageing sensor with image data transmission to the used time of image processor be Ti;
(c), described image processor receives and handle imageing sensor image transmitted data, it is Tp that image processor is handled the required time of respective image data;
(d), when image processor begins to handle imageing sensor transmission respective image data, imageing sensor exposes for induction next frame image, wherein, imageing sensor is Te for gathering the next frame required time for exposure of view data;
(e), image processor relatively obtains the relation of above-mentioned time for exposure Te and view data processing time Tp; As Te〉during Tp, make T=Ti+Te; When Te＜Tp, make T=Ti+Tp; Wherein, T is the cycle that imageing sensor and image processor are handled the current frame image data; Image processor is provided with the entry condition of next frame view data according to calculating current frame period T, makes imageing sensor and image processor in time to transmit and computing the next frame image;
(f), redirect execution in step (b), finish until the optical imagery system works.
2. optical imagery and the optical video equipment self adaptation frame per second regulate and control method of being used for according to claim 1, it is characterized in that: in the described step (e), image processor obtains current frame period T, and with described current frame period T during with initialization predefined greatest frame period Tmax compare; As T〉during Tmax, image processor makes T=Tmax.
3. optical imagery and the optical video equipment self adaptation frame per second regulate and control method of being used for according to claim 1, it is characterized in that: in the described step (e), image processor obtains current frame period T, and with described current frame period T during with initialization predefined minimum frame period T min compare; When T＜Tmin, image processor makes T=Tmin.
4. optical imagery and the optical video equipment self adaptation frame per second regulate and control method of being used for according to claim 1, it is characterized in that: in the described step (e), image processor obtains current frame period T, and with described current frame period T during with initialization predefined greatest frame period Tmax compare; As T〉during Tmax, image processor makes T=Tmax; At this moment, again with the current frame period T that obtains during with the image processor initialization predefined minimum frame period T min compare, when T＜Tmin, image processor makes T=Tmin.
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| CN116700653A (en) * | 2022-02-28 | 2023-09-05 | 荣耀终端有限公司 | Frame rate switching method and related device |
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