CN107864366A

CN107864366A - A kind of data transfer device

Info

Publication number: CN107864366A
Application number: CN201711451358.6A
Authority: CN
Inventors: 杨立发
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-08
Filing date: 2013-05-08
Publication date: 2018-03-30
Also published as: CN104144291A; CN104144291B

Abstract

A kind of conversion method the invention discloses Baeyer formatted data and equivalent with structure luminance color component component, including Baeyer formatted data the mutual conversion formula and implementation with equivalent with structure luminance color component component.Calculation process can be participated in, to reduce hardware spending and power dissipation overhead to greatest extent with the operand of minimum when carrying out image-processing operations with brightness, color difference components using method disclosed by the invention.

Description

A kind of data transfer device

It is on 05 08th, 2013 the applying date that the application, which is, and Application No. 201310175265.0 is entitled " a kind of The divisional application of the patent of conversion method of the Baeyer formatted data with equivalent with structure luminance color component component data ".

Technical field

The present invention relates to a kind of colorful digital video recorder.

Background technology

Data of sensor output Baeyer (BAYER) form used by usual colorful digital video camera, by thereafter Link is managed by the data conversion of Baeyer form into RGB data, and RGB data is converted into brightness-color again in certain link Difference component data (hereinafter referred to as YCbCr data), because YCbCr data have one in the processing of many image procossings and video compress A little unique conveniences.The conversion of RGB data and YCbCr data has formula to follow, and is generally adopted in computer vision utilization With luminance component value [0,255], the calculation formula of color difference components value [- 128,127].

In some occasions, Cb, Cr component are also referred to as U, V component.Without loss of generality, herein with Cb, Cr unified representation.

The conversion of RGB data and YCbCr data is typically laggard in the link that 24 RGB datas are converted into by Baeyer formatted data Capable, and after the computing by this link, data volume increases to original three times.Although some image procossings, video compress Processing needs use YCbCr data, but still needs to use RGB data in the link such as showing, thus there is a need to by YCbCr data are re-transformed into RGB data.

The operation of such multiple conversions brings increase, the sharp increase of computing overhead of data volume, cause resource overhead increase so as to Manufacturing cost is caused to increase；And power consumption increases so as to cause the deterioration of product facility stability factor.

The content of the invention

The purpose of this patent is the data structure for optimizing colorful digital video recorder so that video recorder is being kept with Baeyer lattice While formula data volume carries out computing, more easily data mode can be used.

If the conversion of RGB data and YCbCr data is advanced in the link that 24 RGB datas are converted into by Baeyer formatted data OK, then can be in the case where keeping and the data volume of Baeyer formatted data being constant so that subsequent treatment link can use YCbCr component datas carry out computing.

Baeyer formatted data shares four components, and GrRBGb, its arrangement mode is as shown in figure 1, therefore YCbCr data are using equal Data volume and same structure, YrCrCbYb is should be, as shown in Figure 2.

Because Baeyer formatted data and YrCrCbYb data have four components, therefore common RGB data and YCbCr data Conversion formula is not suitable for the conversion of Baeyer formatted data and YrCrCbYb data.This method is according to the data of Baeyer formatted data Architectural characteristic, on the premise of luminance color component component characteristics are kept, derive by Baeyer formatted data to YrCrCbYb data Change calculation formula：

Yr=0.587Gr+0.299R+0.114B

Cr=-0.2093Gr+0.500R-0.0814B-0.2093Gb

Cb=-0.1656Gr-0.1688R+0.500B-0.1656Gb

Yb=0.299R+0.114B+0.587Gb

And the conversion calculation formula by YrCrCbYb data to Baeyer formatted data：

Gr=1.3518Yr-0.7142Cr-0.3443Cb-0.3518Yb

R=0.500Yr+1.4021Cr+0.500Yb

B=0.500Yr+1.7720Cb+0.500Yb

Yb=1.3518Yr-0.7142Cr-0.3443Cb-0.3518Yb

If representing in the matrix form, as shown in Figure 3.

When Gr, R, B, Gb interval are [0,255], Yr, Yb interval is [0,255], Cr, Cb value area Between be [- 128,127]；When Gr, R, B, Gb interval are [0,4095], Yr, Yb interval are [0,4095], Cr, Cb interval are [- 2048,2047].

Realize the technical scheme of above-mentioned purpose：

A kind of conversion method of Baeyer formatted data to equivalent with structure luminance color component component data, including input Baeyer form number According to, conversion core and output luminance color component component data.The input Baeyer formatted data is the one group of number arranged as shown in Figure 1 According to being provided after being exported by sensor after data receiver circuit receives；The conversion core is matrix as described in Figure 4；The output Luminance color component component data be arrangement mode data as shown in Figure 2.The Baeyer formatted data of input is by vector as shown in Figure 3 Form arranges and conversion core is carried out into dot-product operation therewith by row, produces luminance color component component data as shown in Figure 2, its quantity It is identical with Baeyer formatted data with structure.

A kind of luminance color component component data to the isostructural Baeyer formatted data conversion method of equivalent, including input luminance color component is divided Measure data, reverse conversion core and output Baeyer formatted data.The input luminance color component component data is row as shown in Figure 2 Row mode data, provided by the module that need to be changed；The reverse conversion core is matrix as described in Figure 5；The output Baeyer Formatted data is arrangement data as shown in Figure 1.The luminance color component component data vector form as shown in Figure 3 of input is arranged and incited somebody to action Reverse conversion core carries out dot-product operation therewith by row, produces Baeyer formatted data as shown in Figure 1.

Using above-mentioned technical proposal, the present invention is beneficial to be had technical effect that：

(1) colorful digital video recorder carries out Digital Image Processing computing with minimum data volume so that colorful digital video recorder knot Structure is simple, lower power consumption, cost reduce；

(2) Yr, Yb component in YrCrCbYb data are the luminance component of view data, video data compression computing and other numbers Word image-processing operations can separate on the premise of Baeyer format data structure and data volume is kept with the chromatism data of brightness one Computational methods processing color digital image；

(3) the YrCrCbYb data conversions after handling can will be computed when needed into Baeyer formatted data.

Brief description of the drawings

Fig. 1 is Baeyer formatted data GrRBGb arrangement mode.

Fig. 2 is the arrangement mode of YrCrCbYb data.

Fig. 3 is the calculation formula that Baeyer formatted data is changed mutually with YrCrCbYb data.

Fig. 4 is conversion core of the Baeyer formatted data to YrCrCbYb data.

Fig. 5 is conversion core of the YrCrCbYb data to Baeyer formatted data.

Fig. 6 is implementation block diagram of the Baeyer formatted data to YrCrCbYb data conversions.

Fig. 7 is that block diagram is implemented in the conversion of YrCrCbYb data to Baeyer formatted data.

Embodiment

Conversion method and embodiment of a kind of Baeyer formatted data with equivalent with structure luminance color component component data, such as scheme Shown in 6, including conversion core coefficient module 1, multiplication module 2, adder Module 3, control module 4.Baeyer formatted data inputs To multiplication module 1, under the control of control module 4, coefficient is transported to multiplication module 1 by conversion core coefficient module 2 successively, And itself and input data are carried out by computing by multiplication module 1 successively, operation result conveys successively under the control of control module 4 Accumulating operation is carried out to adder Module 3 and wherein, operation result output is YrCrCbYb data.

A kind of YrCrCbYb data are to Baeyer formatted data conversion method and embodiment, as shown in fig. 7, comprises reverse conversion core Coefficient module 1, multiplication module 2, adder Module 3, control module 4.YrCrCbYb data inputs to multiplication module 1, Under the control of control module 4, coefficient is transported to multiplication module 1 by reverse conversion core coefficient module 2 successively, and by multiplier mould Itself and input data are carried out computing by block 1 successively, and operation result is fed sequentially into adder Module under the control of control module 4 3 and accumulating operation is carried out wherein, operation result output is Baeyer formatted data.

Claims

1. a kind of data transfer device, it is characterised in that YrCrCbYb formatted datas are converted into Baeyer formatted data, such as changed Preceding data are YrCrCbYb formatted datas, and translated data is Baeyer formatted data, then conversion formula is：

Gr=1.3518Yr-0.7142Cr-0.3443Cb-0.3518Yb

R=0.500Yr+1.4021Cr+0.500Yb

B=0.500Yr+1.7720Cb+0.500Yb

Yb=1.3518Yr-0.7142Cr-0.3443Cb-0.3518Yb.

2. a kind of data transfer device as claimed in claim 2, it is characterised in that it is identical to change front and rear data structure.

3. a kind of data transfer device as claimed in claim 1, it is characterised in that it is identical to change front and rear data volume.

4. a kind of data transfer device as claimed in claim 1, it is characterised in that have a kind of data before and after changing into Baeyer lattice Formula data.