WO2004032054A1 - 画像処理装置および画像処理方法 - Google Patents
画像処理装置および画像処理方法 Download PDFInfo
- Publication number
- WO2004032054A1 WO2004032054A1 PCT/JP2003/011422 JP0311422W WO2004032054A1 WO 2004032054 A1 WO2004032054 A1 WO 2004032054A1 JP 0311422 W JP0311422 W JP 0311422W WO 2004032054 A1 WO2004032054 A1 WO 2004032054A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- image data
- memory
- data
- image processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/60—Memory management
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06F3/153—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using cathode-ray tubes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/395—Arrangements specially adapted for transferring the contents of the bit-mapped memory to the screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
Definitions
- the present invention relates to an image processing apparatus and an image processing method that efficiently perform processing of cutting out arbitrary rectangular image data from image data.
- FIG. 1 schematically shows a method of storing such image data in the memory 101.
- one line (one line) of data is sequentially stored in the horizontal direction from the top data, with the top data at the upper left corner of the image 100 as the top address.
- one row of data below the first data is stored in the horizontal direction from left to right of the image 100 for one row.
- the image data is stored one row at a time in the horizontal direction from left to right of the image 100, and the address where the final data is stored is stored in the memory space 101 of the image 100. The final address above.
- the image data of the image 100 is stored in a continuous space on the memory 101.
- the minimum address unit in the memory 101 depends on the specifications of the memory 101, such as a unit of 16 bits and a unit of 32 bits.
- DMA transfer is different from CPU Central Processing Unit.
- DMA transfer is started by the DMA controller without the intervention of the CPU.
- a case is considered in which a part of the original image 110 is cut out in a rectangular shape and the image data of the cut out image 111 is transferred.
- the image data of the cut out image 111 is transferred.
- up Adoresu A ED is the last Adoresu was read from the memory.
- the image data of the original image 110 is stored in a continuous space on the memory from the top data to the end data of the original image 110 from the upper left to the lower right of the image in the horizontal direction.
- the rows are stored in order
- the address A ST and the address A ED is by being specified, the image data from the address A ST of the original image 1 1 0 that is stored in memory until the address A ED are continuously read out.
- the data in the rectangular area of the cut-out image 22 The data in the unnecessary data area indicated by oblique lines is also read, and the time required for reading the data in the unnecessary data area is wasted.
- an object of the present invention is to provide an image processing apparatus and an image processing method capable of performing a process of cutting out a part of an image into a rectangle and transferring the image at a higher speed.
- the present invention provides an image processing apparatus which cuts out a part of image data stored in a memory and transfers the cut out image data. And control means for controlling the reading of the image data from the memory by the image data reading means.
- the control means when cutting out a part of the image data stored in the memory, An image processing apparatus characterized in that an image data reading means is controlled so that evening is read out from a memory for each line of an image to be cut out.
- the present invention relates to an image processing method for extracting and transferring a part of image data stored in a memory, wherein when extracting a part of the image data stored in the memory, the image data is extracted from an image to be extracted.
- This is an image processing method characterized in that data is read from the memory every one line.
- the image data when a part of the image data stored in the memory is cut out, the image data is controlled so as to be read from the memory for each line of the cut out image.
- image data of a desired cut-out image can be transferred without transferring data in an unnecessary area.
- FIG. 1 is a schematic diagram schematically showing a method of storing image data in a memory
- FIG. 2 is a schematic diagram for explaining that a part of an original image is cut into a rectangle by a conventional technique.
- FIG. 3 is a block diagram showing a configuration of an example of an image processing apparatus according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram for explaining that a part of an original image is cut into a rectangle.
- FIG. 5 is a flowchart of an example of a process of cutting out an image from an image according to the embodiment of the present invention.
- the present invention when a part of an image is cut out into a rectangle and transferred, data transfer is controlled for each line of the transferred image data. More specifically, for example, for each line of the image data to be transferred, start address information and read width (width of the cut-out image) information on the memory of the cut-out image cut out from the original image are given. This makes it possible to transfer the cut-out image data in which a part of the original image is cut out without transferring unnecessary data.
- FIG. 3 shows a configuration of an example of the image processing apparatus 1 according to the embodiment of the present invention.
- the image processing apparatus 1 generally includes memories 13 and 2 connected to a bus 11 (bus A), a bus 21 (bus B), and a path 31 (bus C) having different data bus widths.
- the image data read out from 2 and 32 are subjected to image processing such as enlargement and reduction by the processing circuit 41 and displayed on a display device such as an LCD (Liquid Crys tal D isplay) 43. It is intended to be.
- buses 1, 1, 2 and 3 1 each have a data bus width of 1 6-bit, 32-bit and 64-bit.
- the bus 11 is connected to the CPU 12 and the RAM (Random Access Memory) 13
- the CPU l2 exchanges, for example, command data with each part constituting the image processing apparatus 1, and controls the entire operation of the image processing apparatus 1.
- the RAM I 3 has a data bus width of 16 bits and is used as, for example, a work memory of the CPU 12.
- an eDRAM (embedded Dynamic RAM) 22 having a data bus width of 32 bits is connected to the bus 21.
- the eDRAM 22 is a DRAM built in the image processing apparatus 1.
- the bus 31 is connected to, for example, a flash memory 32 having a data bus width of 64 bits.
- the buses 11, 21, and 31 are connected to dedicated DMA devices 10, 20, and 30, respectively. You.
- the DMA devices 10, 20, and 30 control data transfer with respect to the memories 13, 22, and 32 connected to the buses 11, 21, and 31, respectively.
- the data transfer control by the DMA devices 10, 20, and 30 is performed based on control signals supplied from the DMA control circuit 40 to the DMA devices 10, 20, and 30, respectively. That is, access control of the memories 13, 22 and 32 connected to the buses 11, 21 and 31 is performed based on a control signal of the DMA control circuit 40.
- the image data to be read from the DMA control circuit 40 in accordance with this command.
- the address information is output as a control signal and supplied to the DMA device 30.
- the flash memory 32 is accessed by the DMA device 30 based on the control signal supplied from the DMA control circuit 40. JP2003 / 011422, and the image data is read out via the bus 31.
- the read image data is transferred to the processing circuit 41 under the control of the DMA device 30.
- the image data transferred to the processing circuit 41 is subjected to processing such as enlargement and reduction in the processing circuit 41 based on, for example, a command supplied from the CPU 12 and output.
- the image data output from the processing circuit 41 is converted into a drive signal for the LCD 43 by the LCD controller 42 and displayed on the LCD 43.
- the buses 11, 21, and 31, the DMA devices 10, 20, and 30, the DMA control circuit 40, and the processing circuit 41 are, for example, Mounted on one LSI (Large Scale Integrated circuit).
- the above-described memory access control by the DMA control circuit 40 will be described in more detail.
- a part of an image based on the image data stored in the flash memory 32 is cut out into a rectangle and transferred will be described.
- a part of the original image 50 based on the image data stored in the flash memory 32 is cut out into a rectangle as shown as a cut-out image 51.
- access control to the flash memory 32 is performed so as to access only the image data corresponding to the cut-out image 51 and not to access data in an unnecessary area.
- the specification of the cut-out image 51 is the address AST which is the entire start address of the cut-out image 51, corresponding to the data in the upper left corner of the cut-out image 51 .
- the size H and the size V indicate the horizontal and vertical sizes of the cut-out image 51, respectively.
- the horizontal size H A of the original image 50 and the original image It is assumed that the start address and the end address of the image 50, that is, the addresses corresponding to the data at the upper left corner and the lower right corner of the original image 50 are known in advance.
- FIG. 5 is a flowchart of an example of a process for extracting an image 51 from an image 50 according to an embodiment of the present invention.
- data such as the address A STQ , the size H and the size V, which are the start addresses of the entire cutout image 51 , are set in the DMA control circuit 40 (step S10 ).
- These data are supplied from, for example, an external CPU (not shown). It may be supplied from the CPU 12.
- information specifying the flash memory 32 among the memories 13, 22, and 32 is also supplied to the DMA control circuit 40.
- step S 11 the DMA control circuit 40 To the DMA device 30, the data of the address A STn and the transfer size H, which is the start address of the cutout image 51 of the next line, is transmitted, and the data transfer from the flash memory 32 starts. Is transmitted. If a cut-out first row of the transfer of the image 5 1, as an address A STn, address A ST is the entire head Adoresu the clipped image 5 1. Is specified.
- the start address AST In the DMA device 30, the start address AST . Then, the flash memory 32 is accessed according to the transfer size H and the start signal, and the image data of the first row of the cut-out image 51 is read from the flash memory 32. Address A ST of flash memory 32 . Is accessed by the DMA device 30, and the image data is sequentially read for each access unit up to the address corresponding to the size H. The read image data is transferred to the processing circuit 41 via the bus 31. Rhinoceros When the image data is transferred to the address corresponding to the size H, the data transfer for one line of the cut-out image 51 is completed (step S12).
- step S13 When the transfer of the image data for one line of the cut-out image 51 is completed, an end signal is transmitted from the DMA device 30 to the DMA control circuit 40 in step S13.
- the DMA control circuit 40 determines whether or not the data transfer of the size V has been completed (step S14). If it is determined that the transfer of the image data for the size V has been completed, it is determined that the transfer of the image data of the cut-out image 51 has been completed, and a series of processing is ended.
- the process returns to step S11.
- the address A ST1 is a start address of the next line is calculated. For example, assuming that the leading address of the n-th line of the cut-out image 51 is address A STn , the address A mn + U which is the leading address of the next line has the horizontal size H A of the original image 50 at this address A STn. The number of addresses corresponding to the minutes is added.
- step S14 whether or not the transfer of the size V in the above-described step S14 has been completed can be determined, for example, by a count value obtained by counting the number of loop processes returned from step S14 to step S11. it can .
- the operation of the DMA control circuit 40 depends on each of the DMA devices 10, 20 and And 30 for giving the read width of image data, giving the head address of the next row to be read, and giving a start signal instructing the start of transfer.
- the image processing apparatus 1 according to this embodiment is connected to three types of paths 11, 21, and 31 having different data bus widths. Are provided with dedicated DMA devices 10, 20 and 30.
- the DMA control circuits of the DMA devices 10, 20, and 30 can be used. 40 can be shared. For example, standardize the specification method of the start signal and address among the DMA devices 10, 20, and 30
- the DMA control circuit 40 includes an adder and a register, and has a relatively large circuit scale.
- the circuit scale can be reduced by sharing the DMA control circuit 40 among the DMA devices 10, 20, and 30.
- the DMA control circuit 40 can treat the buses 11, 21, and 31 connected to the DMA devices 10, 20, and 30 equivalently.
- the present invention cuts out a part of the original image into a rectangle. When transferring the image, it controls the line-by-line transfer of the clipped image. As a result, only the necessary part of the data can be transferred, so that a desired rectangular area can be cut out without transferring the data in the unnecessary data area, and the data transfer speed can be increased. effective.
- the function of reading one row of data from the cut-out image is separated into a control function for controlling the function. Therefore, by applying the present invention to a system connected to a plurality of memories and buses having different data bus widths, it is possible to share a control function for the connection of the plurality of memories and buses, and This has the effect of reducing the scale.
- control means for transmitting address information designating an address at which data transfer is performed to the image data reading means and a start signal designating start of data transfer to the control means.
- the interface is common to multiple image data reading means. Therefore, the control means can treat each of a plurality of buses having different bus widths equivalently, and has the effect of being able to flexibly cope with a bus change or the like. This also has the effect of being suitable for reuse of design assets.
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Storing Facsimile Image Data (AREA)
- Image Processing (AREA)
- Bus Control (AREA)
- Image Input (AREA)
- Editing Of Facsimile Originals (AREA)
- Digital Computer Display Output (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03799097A EP1548643A4 (en) | 2002-10-04 | 2003-09-08 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD |
| US10/526,490 US20060050992A1 (en) | 2002-10-04 | 2003-09-08 | Image processing device and image processing method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002/292547 | 2002-10-04 | ||
| JP2002292547A JP2004127093A (ja) | 2002-10-04 | 2002-10-04 | 画像処理装置および画像処理方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004032054A1 true WO2004032054A1 (ja) | 2004-04-15 |
Family
ID=32063919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/011422 Ceased WO2004032054A1 (ja) | 2002-10-04 | 2003-09-08 | 画像処理装置および画像処理方法 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20060050992A1 (ja) |
| EP (1) | EP1548643A4 (ja) |
| JP (1) | JP2004127093A (ja) |
| KR (1) | KR20050052508A (ja) |
| WO (1) | WO2004032054A1 (ja) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100829108B1 (ko) * | 2006-06-27 | 2008-05-16 | (주)코아정보시스템 | 패턴 기울기 계산 기능을 갖는 2차원 바코드 판독 장치 및방법 |
| CN102521141B (zh) * | 2011-12-01 | 2014-08-27 | 福州瑞芯微电子有限公司 | 一种紧凑存储图像数据的读取装置及方法 |
| KR20140109128A (ko) | 2013-03-05 | 2014-09-15 | 삼성전자주식회사 | 데이터 리드 방법과 상기 방법을 수행할 수 있는 장치들 |
| JP6476655B2 (ja) * | 2014-08-26 | 2019-03-06 | 株式会社リコー | データ転送制御装置 |
| JP2016134005A (ja) | 2015-01-20 | 2016-07-25 | オリンパス株式会社 | 画像処理装置 |
| JP6506052B2 (ja) * | 2015-03-04 | 2019-04-24 | 株式会社メガチップス | メモリデータ処理装置およびメモリデータ転送方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710067U (ja) * | 1980-06-17 | 1982-01-19 | ||
| JPS6334658A (ja) * | 1986-07-29 | 1988-02-15 | Sharp Corp | 画像処理用dmaコントロ−ラ |
| JPS63205773A (ja) * | 1987-02-20 | 1988-08-25 | Fujitsu Ltd | イメ−ジ編集方式 |
| JP2001084215A (ja) * | 1999-07-12 | 2001-03-30 | Matsushita Electric Ind Co Ltd | データ処理装置 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3141450A1 (de) * | 1980-10-17 | 1982-06-03 | Canon K.K., Tokyo | "bildverarbeitungssystem" |
| JPS58103266A (ja) * | 1981-12-15 | 1983-06-20 | Toshiba Corp | 文字画像処理装置 |
| US4574364A (en) * | 1982-11-23 | 1986-03-04 | Hitachi, Ltd. | Method and apparatus for controlling image display |
| US4907283A (en) * | 1987-03-13 | 1990-03-06 | Canon Kabushiki Kaisha | Image processing apparatus |
| JPH05193203A (ja) * | 1992-01-22 | 1993-08-03 | Toyo Electric Mfg Co Ltd | 画像矩形dma方式 |
| US5585864A (en) * | 1992-06-24 | 1996-12-17 | Seiko Epson Corporation | Apparatus for effecting high speed transfer of video data into a video memory using direct memory access |
| US5937152A (en) * | 1996-04-16 | 1999-08-10 | Brother Kogyo Kabushiki Kaisha | Printer with buffer memory |
| JPH10210251A (ja) * | 1997-01-20 | 1998-08-07 | Toshiba Corp | 画像メモリアクセス方法、画像形成装置、画像形成記憶装置、アドレス発生方法、及びアドレス発生装置 |
| US6023281A (en) * | 1998-03-02 | 2000-02-08 | Ati Technologies, Inc. | Method and apparatus for memory allocation |
| JP4098892B2 (ja) * | 1998-07-31 | 2008-06-11 | 松下電器産業株式会社 | 画像伝送装置、デジタルカメラ、画像処理装置、画像伝送方法、画像伝送方法、及び画像の有効領域指定方法 |
| US6486888B1 (en) * | 1999-08-24 | 2002-11-26 | Microsoft Corporation | Alpha regions |
| US7495669B2 (en) * | 2002-12-26 | 2009-02-24 | Canon Kabushiki Kaisha | Image processing apparatus and image processing method |
| US7061642B2 (en) * | 2000-09-14 | 2006-06-13 | Canon Kabushiki Kaisha | Image processing apparatus, image processing method, storage medium, and image information printing system |
| JP3781634B2 (ja) * | 2001-04-26 | 2006-05-31 | シャープ株式会社 | 画像処理装置および画像処理方法並びに携帯用映像機器 |
-
2002
- 2002-10-04 JP JP2002292547A patent/JP2004127093A/ja active Pending
-
2003
- 2003-09-08 KR KR1020057004775A patent/KR20050052508A/ko not_active Ceased
- 2003-09-08 US US10/526,490 patent/US20060050992A1/en not_active Abandoned
- 2003-09-08 EP EP03799097A patent/EP1548643A4/en not_active Withdrawn
- 2003-09-08 WO PCT/JP2003/011422 patent/WO2004032054A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710067U (ja) * | 1980-06-17 | 1982-01-19 | ||
| JPS6334658A (ja) * | 1986-07-29 | 1988-02-15 | Sharp Corp | 画像処理用dmaコントロ−ラ |
| JPS63205773A (ja) * | 1987-02-20 | 1988-08-25 | Fujitsu Ltd | イメ−ジ編集方式 |
| JP2001084215A (ja) * | 1999-07-12 | 2001-03-30 | Matsushita Electric Ind Co Ltd | データ処理装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1548643A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1548643A1 (en) | 2005-06-29 |
| KR20050052508A (ko) | 2005-06-02 |
| US20060050992A1 (en) | 2006-03-09 |
| EP1548643A4 (en) | 2008-05-14 |
| JP2004127093A (ja) | 2004-04-22 |
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