CN106095360B - Image processing method and image processing apparatus based on palette - Google Patents
Image processing method and image processing apparatus based on palette Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
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Abstract
Set forth herein a kind of image processing method and image processing apparatus based on palette solves the problems, such as that the decoding based on pallet mode is slow.It is related to video decoding；Image data is made of the pixel value of matrix arrangement, the method includes the steps：After carrying out look-up table mapping to the image data using pallet mode, pixel coordinate matrixing is carried out to the image data after mapping.The above method has the effect of accelerating image processing speed.
Description
Technical field
The present invention relates to video decodings.
Background technique
In computer image technology, the color of a pixel is the R by it, G, what B component indicated, and each component passes through again
Quantization is crossed, the total quantization series of pixel is exactly the color depth of this display system.It is higher to quantify series, can indicate
Color is also more, and final image is also more true to nature.When quantifying series and reaching 16 or more, referred to as true color.But
It is higher to quantify series, it is necessary to which higher data width is born also heavier to processor bring；Quantify series 8 with
When lower, the color that can be expressed is again very little, and it is impossible to meet the specific demands of user.
In order to solve this problem, palette techniques can be taken.So-called palette is exactly the mode in low color depth
Under, a linear list of corresponding relationship is established between limited pixel value and RGB color.Such as from 16 all coloured silks
A certain number of colors, establishment index are extracted in color.When needing using certain colour, it is not necessary to RGB points of this color
Amount is described, it is only necessary to quote its call number, so that it may so that user chooses the color of oneself needs.The coding of call number is long
Degree is far smaller than the code length of RGB component, therefore while colour display, also significantly reduces the burden of system.
By taking 256 tone colour tables as an example, the rgb value of 256 kinds of colors is stored in palette, the rgb value of each color is 16.
When with this 256 kinds of colors establishment index, 8 bit data widths are only needed from 00H~FFH, and color corresponding to each index
It is the colouring information of 16 bit widths.In the not high occasion of some pairs of color type requirements, such as instrument terminal, information terminal, adjust
Colour table technology just dexterously solves the contradiction between data width and color depth.
For the processor of existing parsing palette, after the parsing of palette look-up table, it is also necessary to carry out other images
Conversion process makes it be shown as final effect, and needs to table look-up by multiple in the process.Experiment test shows coding
Bit number needed for palette accounts for 10% or so of total code stream, accounts for relatively large specific gravity, repeatedly tables look-up and seriously affects toning
The attainable encoding efficiency of plate coding mode institute.
Summary of the invention
It is given below and simplifying for one or more aspects is summarized to try hard to provide the basic comprehension to such aspect.This
The extensive overview of the not all aspect contemplated is summarized, and is both not intended to identify in all aspects key or decisive
The element also non-range attempted to define in terms of any or all.Its unique purpose be to provide in simplified form it is one or more
Some concepts of a aspect are using the sequence as more specifical explanation given later.
The present invention provides a kind of image processing method and image processing apparatus based on palette, solves based on toning template die
The slow problem of the decoding of formula.
To achieve the above object, a kind of image processing method based on palette is inventor provided, image data is by square
The pixel value of battle array arrangement is constituted comprising step：Look-up table mapping is carried out to using the image data of pallet mode, to mapping
Image data afterwards carries out pixel coordinate matrixing.
It further, further include step after pixel coordinate matrixing：By the image after progress pixel coordinate matrixing
Data are exported to LCD.
Further, the pixel coordinate matrixing includes at least one：Translation rotates, and scaling, mistake is cut.
Further, the look-up table mapping includes step：Look-up table is accessed according to pixel value, obtains color value.
Further, look-up table is divided into odd look-up table and even look-up table；Odd look-up table storage index address is the color of odd number
Value, even look-up table storage index address are the color value of even number；
After obtaining pixel sequence, the first pixel is taken out by the sequence of queue, further takes out the second pixel；And it carries out odd even and sentences
It is disconnected；
If judging, the first pixel and the address of the second pixel instruction are all even address or are all odd address, use the first picture
Element access look-up table obtains the corresponding color value of the first pixel, and using the second pixel as the first pixel, continuation takes from queue
Next pixel returns to above-mentioned carry out odd even judgement as the second pixel out；
It if judging the address that the first pixel and the second pixel indicate to be respectively even address and odd address, or is respectively odd ground
Location and even address, then synchronous to access even look-up table using even address using odd address access surprise look-up table, acquisition corresponds to picture respectively
Color value corresponding to element；
Until the sequence of queue is sky.
Inventor provides a kind of image processing apparatus based on palette, including look-up table means, picture element matrix convert mould
Block, image data acquisition module；
Image data acquisition module connection and locating table module；Look-up table means connect picture element matrix conversion module；
Image data acquisition module is for obtaining image data；
Look-up table means carry out look-up table mapping for storing look-up table, and according to the pixel value in image data；
Picture element matrix conversion module is used to carry out pixel coordinate matrixing to the image data after mapping；
Above-mentioned image data is made of the pixel value of matrix arrangement.
Further, the image data that picture element matrix conversion module is used to carry out after pixel coordinate matrixing is defeated to LCD
Out.
Further, picture element matrix conversion module is for realizing the function of including at least one of the following：Translation rotates, scaling,
Mistake is cut.
Further, look-up table means are used to access look-up table according to pixel value, obtain color value.
Further, look-up table is divided into odd look-up table and even look-up table；Odd look-up table storage index address is the color of odd number
Value, even look-up table storage index address are the color value of even number；
Look-up table means are used for after obtaining pixel sequence, are taken out the first pixel by the sequence of queue, are further taken out the second picture
Element；And carry out odd even judgement；
If judging, the first pixel and the address of the second pixel instruction are all even address or are all odd address, use the first picture
Element access look-up table obtains the corresponding color value of the first pixel, and using the second pixel as the first pixel, continuation takes from queue
Next pixel returns to above-mentioned carry out odd even judgement as the second pixel out；
It if judging the address that the first pixel and the second pixel indicate to be respectively even address and odd address, or is respectively odd ground
Location and even address, then synchronous to access even look-up table using even address using odd address access surprise look-up table, acquisition corresponds to picture respectively
Color value corresponding to element；
Until the sequence of queue is sky.
It is different from the prior art, above-mentioned coding/decoding method directly generates coordinate according to broadcast state after accessing look-up table and becomes
Matrix is changed, by carrying out matrixing to image data to transformation matrix of coordinates, to directly obtain and current player state
The picture to match with the state of display equipment；Since system layer and application layer software all can to processing such as image rotation and scalings
Look-up table is called again, to cause operational redundancy；And the above method does not need again through system layer and application layer software
Frame image is zoomed in and out and rotation processing, to reduce power consumption and processing time, makes to optimize image rendering process
Obtain the video that can handle bigger code rate or bigger resolution ratio in the identical situation of memory.
To address related purpose before capable of reaching, this one or more aspect, which is included in, to be hereinafter fully described and appended
The feature particularly pointed out in claim.The following description and drawings illustrate certain explanations of this one or more aspect
Property feature.But these features are only several in the various modes for indicate the principle that various aspects can be used, and
This description is intended to cover all such aspects and its equivalent aspect.
Detailed description of the invention
Disclosed aspect is described below with reference to attached drawing, provide attached drawing be in order to illustrate and non-limiting disclosed side
Face, similar label indicates similar elements in attached drawing, and wherein：
Fig. 1 is the main composition partial schematic diagram of processing unit described in specific embodiment；
Fig. 2 is the main composition part described in specific embodiment with the processing unit of odd look-up table and even look-up table
Schematic diagram；
Fig. 3 be specific embodiment described in processing unit main composition partial schematic diagram (matrixing mould include rotation
Turn logic and scaling logic).
Specific embodiment
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality
It applies example and attached drawing is cooperated to be explained in detail.In the following description, numerous details is elaborated for explanatory purposes to provide pair
The thorough understanding of one or more aspects.It will be evident that such aspect can also be practiced without these details.
Acronym list
LUT:Look-up table (look up table), be replaced with simple inquiry operation when running the array that calculates or
Data structure as Associate array.Refer to one that corresponding relationship is established between limited pixel value and RGB color in originally asking
Linear list.
DMA：Direct memory access (Direct Memory Access, DMA) is that one of computer science memory is visited
Ask technology.It allows the hardware subsystem (computer peripheral equipment) inside certain computers, can independently direct read/write Installed System Memory, and
It is not required to central processing unit (CPU) intervention processing.Under the processor burden of equal extent, DMA is a kind of quick data transmission
Mode.The system of many hardware will use DMA, include hard disk controller, drawing video card, network interface card and sound card.
Referring to figures 1-3, provided herein is a kind of image processing method based on palette, image data is by matrix arrangement
Pixel value is constituted, including step：After carrying out look-up table mapping to the image data using pallet mode, to the image after mapping
Data carry out pixel coordinate matrixing.It is call number mapping preceding pixel value according to look-up table, and is mapped according to look-up table
Pixel value is rgb value afterwards.Carry out tabling look-up mapping herein i.e. by call number lookup LUT table, to obtain rgb value.Image by
The pixel value of matrix arrangement is constituted, and pixel value arranges in the way of ranks, to constitute the complete image data of a frame.To figure
As carrying out coordinates matrix transformation i.e. using the matrix of a 3*3, it is used to carry out changes in coordinates to image.Picture is carried out to image data
Original coordinate points, i.e., is transferred to new coordinate points by transformation matrix of coordinates, thus to every bit by plain coordinates matrix transformation
It carries out moving to form new picture,.
In a mobile device, since broadcast state (i.e. view screen size and Orientation etc.) can change, thus
When handling same video flowing, needs zoom in and out the frame image parsed according to current view screen size, Yi Jiruo
When screen direction changes, need to rotate frame image, so that the image played meets current scene, so that with
Family obtains preferably ornamental experience.
It can be understood that the decoded image data of video is rectangular, and for specific display, such as round, side
Shape, the display of diamond shape etc., the above-mentioned decoded image data of video is also after transformation matrix is handled, then is output to display dress
It sets, i.e., by the image data after progress pixel coordinate matrixing, is exported after being handled using transformation matrix to LCD.By becoming
Matrix is changed to export the above-mentioned specific display of image adaptation.
Referring to Fig. 1, the above method executes in this way：DMA takes out image data to be resolved from bus；The image data
In pixel value be call number, send color resolution unit for the image data, color resolution unit is accessed according to call number
LUT obtains the corresponding rgb value of call number, and the image data is passed through to the processing of transformation matrix of coordinates, i.e., according to coordinate transform
Matrix move forming new picture to every bit.
The prior art is distinguished, above-mentioned coding/decoding method directly generates coordinate transform according to broadcast state after accessing look-up table
Matrix, by transformation matrix of coordinates to image data carry out matrixing, thus directly obtain with current player state and
The picture that the state of display equipment matches；Since system layer and application layer software all can be again to processing such as image rotation and scalings
Secondary calling look-up table, to cause operational redundancy；And the above method does not need again through system layer and application layer software pair
Frame image zooms in and out and rotation processing, so that image rendering process is optimized, so that power consumption and processing time are reduced, so that
It can handle the video of bigger code rate or bigger resolution ratio in the identical situation of memory.
The pixel coordinate matrixing includes at least one：Translation rotates, and scaling, mistake is cut.I.e. coordinates matrix becomes
Changing can be realizes above-mentioned translation, rotation, scaling, the wrong single transformation cut, and translation also may be implemented, rotation, scaling, wrong cut
Complex transformation.The complex transformation being made of the coordinate transform of multiple and different transformation or identical transformation, these coordinate transforms is corresponding
Transformation matrix of coordinates be multiplied, thus obtain a complex transformation matrix.As shown in Fig. 2, coordinates matrix transformation can pass through one
Secondary property complex transformation and implement, be also possible to multiple single transformation superposition as shown in Figure 3 and implement.
Preferably, in some embodiments, above-mentioned look-up table is divided into odd look-up table and even look-up table；Odd look-up table storage
Index address is the color value of odd number, and even look-up table storage index address is the color value of even number；
Referring to fig. 2, Fig. 3；After obtaining pixel sequence, the first pixel is taken out by the sequence of queue, further takes out the second pixel；
And carry out odd even judgement；
If judging, the first pixel and the address of the second pixel instruction are all even address or are all odd address, use the first picture
Element access look-up table obtains the corresponding color value of the first pixel, and using the second pixel as the first pixel, continuation takes from queue
Next pixel returns to above-mentioned carry out odd even judgement as the second pixel out；
It if judging the address that the first pixel and the second pixel indicate to be respectively even address and odd address, or is respectively odd ground
Location and even address, then synchronous to access even look-up table using even address using odd address access surprise look-up table, acquisition corresponds to picture respectively
Color value corresponding to element；
Until the sequence of queue is sky.
By the above method, look-up table can be concurrently accessed, to improve the access speed of look-up table.
Inventor provides a kind of image processing apparatus based on palette, and the device is for realizing the above method comprising
Look-up table means, picture element matrix conversion module, image data acquisition module；
Image data acquisition module connection and locating table module；Look-up table means connect picture element matrix conversion module；
Image data acquisition module is for obtaining image data；
Look-up table means carry out look-up table mapping for storing look-up table, and according to the pixel value in image data；
Picture element matrix conversion module is used to carry out pixel coordinate matrixing to the image data after mapping；
Above-mentioned image data is made of the pixel value of matrix arrangement.
In some embodiments, image data acquisition module can be DMA, and picture element matrix conversion module is logic circuit,
Look-up table means are the memory for being stored with look-up table.
Image processing apparatus herein is image processor or electronic equipment with the above function.
In some embodiments, picture element matrix conversion module will be for that will carry out the image data after pixel coordinate matrixing
It is exported to LCD.
In further embodiments, picture element matrix conversion module is for realizing the function of including at least one of the following：Translation,
Rotation, scaling, mistake are cut.
In further embodiments, look-up table means are used to access look-up table according to pixel value, obtain color value.
In further embodiments, look-up table is divided into odd look-up table and even look-up table；Odd look-up table stores index address
The color value of odd number, even look-up table storage index address are the color value of even number；
Look-up table means are used for after obtaining pixel sequence, are taken out the first pixel by the sequence of queue, are further taken out the second picture
Element；And carry out odd even judgement；
If judging, the first pixel and the address of the second pixel instruction are all even address or are all odd address, use the first picture
Element access look-up table obtains the corresponding color value of the first pixel, and using the second pixel as the first pixel, continuation takes from queue
Next pixel returns to above-mentioned carry out odd even judgement as the second pixel out；
It if judging the address that the first pixel and the second pixel indicate to be respectively even address and odd address, or is respectively odd ground
Location and even address, then synchronous to access even look-up table using even address using odd address access surprise look-up table, acquisition corresponds to picture respectively
Color value corresponding to element；
Until the sequence of queue is sky.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or the terminal device that include a series of elements not only include those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or end
The intrinsic element of end equipment.In the absence of more restrictions, being limited by sentence " including ... " or " including ... "
Element, it is not excluded that there is also other elements in process, method, article or the terminal device for including the element.This
Outside, herein, " being greater than ", " being less than ", " being more than " etc. are interpreted as not including this number；" more than ", " following ", " within " etc. understand
Being includes this number.
It should be understood by those skilled in the art that, the various embodiments described above can provide as method, apparatus or computer program production
Product.Complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in these embodiments
Form.The all or part of the steps in method that the various embodiments described above are related to can be instructed by program relevant hardware come
It completes, the program can store in the storage medium that computer equipment can be read, for executing the various embodiments described above side
All or part of the steps described in method.The computer equipment, including but not limited to：Personal computer, server, general-purpose computations
It is machine, special purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, smart home device, wearable
Smart machine, vehicle intelligent equipment etc.；The storage medium, including but not limited to：RAM, ROM, magnetic disk, tape, CD, sudden strain of a muscle
It deposits, USB flash disk, mobile hard disk, storage card, memory stick, webserver storage, network cloud storage etc..
The various embodiments described above are referring to the method according to embodiment, equipment (system) and computer program product
Flowchart and/or the block diagram describes.It should be understood that can be realized by computer program instructions every in flowchart and/or the block diagram
The combination of process and/or box in one process and/or box and flowchart and/or the block diagram.It can provide these computers
Program instruction generates a machine to the processor of computer equipment, so that the finger executed by the processor of computer equipment
It enables and generates to specify in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of function.
These computer program instructions, which may also be stored in, to be able to guide computer equipment computer operate in a specific manner and sets
In standby readable memory, so that the instruction being stored in the computer equipment readable memory generates the manufacture including command device
Product, command device realization refer in one or more flows of the flowchart and/or one or more blocks of the block diagram
Fixed function.
These computer program instructions can also be loaded into computer equipment, so that executing on a computing device a series of
Operating procedure is to generate computer implemented processing, so that the instruction executed on a computing device is provided for realizing in process
The step of function of being specified in figure one process or multiple processes and/or block diagrams one box or multiple boxes.
Although the various embodiments described above are described, once a person skilled in the art knows basic wounds
The property made concept, then additional changes and modifications can be made to these embodiments, so the above description is only an embodiment of the present invention,
It is not intended to limit scope of patent protection of the invention, it is all to utilize equivalent structure made by description of the invention and accompanying drawing content
Or equivalent process transformation, being applied directly or indirectly in other relevant technical fields, similarly includes in patent of the invention
Within protection scope.
Claims (8)
1. the image processing method based on palette, image data is made of the pixel value of matrix arrangement, which is characterized in that including
Step：Look-up table mapping is carried out to using the image data of pallet mode, pixel coordinate is carried out to the image data after mapping
Matrixing；
Look-up table is divided into odd look-up table and even look-up table；Odd look-up table storage index address is the color value of odd number, even look-up table
Store the color value that index address is even number；
After obtaining pixel sequence, the first pixel is taken out by the sequence of queue, further takes out the second pixel；And carry out odd even judgement；
If judging, the first pixel and the address of the second pixel instruction are all even address or are all odd address, are visited using the first pixel
It asks look-up table, obtains the corresponding color value of the first pixel, and using the second pixel as the first pixel, continue under being taken out in queue
One pixel returns to above-mentioned carry out odd even judgement as the second pixel；
If judge the first pixel and the second pixel instruction address be respectively even address and odd address, or respectively odd address with
Even address then synchronizes and accesses odd look-up table using the even look-up table of even address access using odd address, obtains respective pixel institute respectively
Corresponding color value；
Until the sequence of queue is sky.
2. the image processing method according to claim 1 based on palette, which is characterized in that become in pixel coordinate matrix
It further include step after changing：Image data after progress pixel coordinate matrixing is exported to LCD.
3. the image processing method according to claim 1 based on palette, which is characterized in that the pixel coordinate matrix
Transformation includes at least one：Translation rotates, and scaling, mistake is cut.
4. the image processing method according to claim 1 based on palette, which is characterized in that the look-up table mapping packet
Include step：Look-up table is accessed according to pixel value, obtains color value.
5. the image processing apparatus based on palette, which is characterized in that including look-up table means, picture element matrix conversion module, figure
As data acquisition module；
Image data acquisition module connection and locating table module；Look-up table means connect picture element matrix conversion module；
Image data acquisition module is for obtaining image data；
Look-up table means carry out look-up table mapping for storing look-up table, and according to the pixel value in image data；
Look-up table is divided into odd look-up table and even look-up table；Odd look-up table storage index address is the color value of odd number, even look-up table
Store the color value that index address is even number；
Look-up table means are used for after obtaining pixel sequence, are taken out the first pixel by the sequence of queue, are further taken out the second pixel；And
Carry out odd even judgement；
If judging, the first pixel and the address of the second pixel instruction are all even address or are all odd address, are visited using the first pixel
It asks look-up table, obtains the corresponding color value of the first pixel, and using the second pixel as the first pixel, continue under being taken out in queue
One pixel returns to above-mentioned carry out odd even judgement as the second pixel；
If judge the first pixel and the second pixel instruction address be respectively even address and odd address, or respectively odd address with
Even address then synchronizes and accesses odd look-up table using the even look-up table of even address access using odd address, obtains respective pixel institute respectively
Corresponding color value；
Until the sequence of queue is sky；
Picture element matrix conversion module is used to carry out pixel coordinate matrixing to the image data after mapping；
Above-mentioned image data is made of the pixel value of matrix arrangement.
6. the image processing apparatus according to claim 5 based on palette, which is characterized in that picture element matrix conversion module
It is exported for the image data after pixel coordinate matrixing will to be carried out to LCD.
7. the image processing apparatus according to claim 5 based on palette, which is characterized in that picture element matrix conversion module
For realizing the function of including at least one of the following：Translation rotates, and scaling, mistake is cut.
8. the image processing apparatus according to claim 5 based on palette, which is characterized in that look-up table means are used for root
Look-up table is accessed according to pixel value, obtains color value.
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| CN1258059A (en) * | 1998-12-18 | 2000-06-28 | 索尼公司 | Image processing apparatus and image processing method |
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| CN103034975A (en) * | 2012-12-18 | 2013-04-10 | 广州杰赛科技股份有限公司 | Image processing method and device |
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| US9880844B2 (en) * | 2013-12-30 | 2018-01-30 | Cavium, Inc. | Method and apparatus for parallel and conditional data manipulation in a software-defined network processing engine |
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| CN1258059A (en) * | 1998-12-18 | 2000-06-28 | 索尼公司 | Image processing apparatus and image processing method |
| CN101216944A (en) * | 2008-01-07 | 2008-07-09 | 北大方正集团有限公司 | A method and device for morphing shading in the process of typeset |
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