Unlock instant, AI-driven research and patent intelligence for your innovation.

Movement amount detecting device, image forming apparatus, and movement amount detecting method

A detection device and detection method technology, applied in image analysis, image enhancement, image communication, etc., can solve problems such as detection result errors

Inactive Publication Date: 2018-05-29
KONICA MINOLTA INC
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in images containing speckle patterns, frequency components containing noise
If the frequency component of noise is used, an error will occur in the detection result of the movement amount

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Movement amount detecting device, image forming apparatus, and movement amount detecting method
  • Movement amount detecting device, image forming apparatus, and movement amount detecting method
  • Movement amount detecting device, image forming apparatus, and movement amount detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0044] [Internal structure of image forming apparatus]

[0045] refer to figure 1 , the image forming apparatus 100 on which the movement amount detection device 45 is mounted will be described. figure 1 It is a diagram showing an example of the internal structure of the image forming apparatus 100 .

[0046] figure 1 In , an image forming apparatus 100 that is a color printer is shown. Hereinafter, the image forming apparatus 100 which is a color printer will be described, but the image forming apparatus 100 is not limited to a color printer. For example, image forming apparatus 100 may be a multifunction peripheral (MFP: Multi-Functional Peripheral).

[0047] The image forming apparatus 100 includes: image forming units 1Y, 1M, 1C, 1K; transfer belt 30 ; primary transfer roller 31 ; secondary transfer roller 33 ; cassette 37 ; driven roller 38 ; driving roller 39 ; pickup roller 41 paper feed roller 42 ; transport roller 43 ; paper detection sensor 44 ; timing roller 46 ;...

Embodiment approach 2

[0154] The movement amount detection device according to the second embodiment of the present invention is a modified example of the movement amount detection device 45 according to the first embodiment. Specifically, the movement amount detection device of Embodiment 2 differs from the movement amount detection device 45 of Embodiment 1 only in that a calculation unit 59 a is provided instead of the calculation unit 59 .

[0155] refer to Figure 12 Next, the internal configuration of the calculation unit 59a included in the movement amount detection device according to the second embodiment will be described. Figure 12 It is a block diagram showing the internal structure of the calculating part 59a with which the movement amount detection apparatus of Embodiment 2 is equipped.

[0156] Such as Figure 12As shown, the calculation unit 59 a differs from the calculation unit 59 of the first embodiment in that it includes a correction unit 64 a and a synthesis unit 62 a inste...

Embodiment approach 3

[0165] The movement amount detection device according to the third embodiment of the present invention is a modified example of the movement amount detection devices according to the first and second embodiments. In Embodiments 1 and 2, the correction units 64 and 64a of the movement amount detection device use the average spot diameter Sd obtained from the characteristics of the imaging lens 56 as ave The cutoff value is determined as an image characteristic value. In contrast, in Embodiment 3, the cutoff frequency is determined using the minimum spot diameter obtained from the characteristics of the imaging lens 56 as an image characteristic value.

[0166] The spot size has a certain degree of distribution. Therefore, there exists a ratio of average spot diameter Sd ave Larger diameter of the spot and than the average spot diameter Sd ave Small diameter spot. Therefore, in order to also consider the ratio of the average spot diameter Sd to the ave For the data related ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A movement amount detecting device includes a discrete Fourier transform unit performing discrete Fourier transform on N-th image data and (N+1)th image data, thereby generating N-th frequency space data and (N+1)th frequency space data; a cutoff value determining unit used for acquiring a target speed of a sheet and determining a cutoff value based on the obtained target speed and exposure time in an image sensor; and a movement amount calculating unit used for calculating an amount of movement of the sheet based on a phase difference between the N-th frequency space data and the (N+1)th frequency space data in a frequency component smaller than the cutoff value.

Description

technical field [0001] The present invention relates to a movement amount detection device, an image forming apparatus, and a movement amount detection method for detecting the movement amount of a moving object. Background technique [0002] Electrophotographic image forming apparatuses are in widespread use. A general electrophotographic image forming apparatus performs a process of attaching a toner to an electrostatic latent image on a photoreceptor, a process of primary transferring the toner image on a photoreceptor to a transfer belt, and transferring the toner image to a transfer belt. A process of secondary transferring the toner image on the sheet onto a sheet (for example, paper) and a process of fixing the toner image on the sheet by a fixing device are referred to as a printing process. [0003] Here, if there is a variation in the moving speed of a moving body such as a photoreceptor, a transfer belt, or a sheet, transfer variation occurs. Transfer deviation ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/00
CPCG03G15/505G03G15/5054G06T2207/10016G06T7/262G06T2207/20056H04N1/00251H04N1/00705H04N1/00734G06T7/97G06T2207/20024H04N2201/0094
Inventor 加藤高基小林雄治福永雅行
Owner KONICA MINOLTA INC