38results about How to "Reduce banding" patented technology

A belt moving device of the present invention includes a drive shaft for moving the belt and a drive transfer line for transferring the output torque of a motor to the drive shaft. A marker sensor senses a marker positioned on the belt to thereby determine the position of the belt in the direction of movement. A rotation condition sensor senses the rotation condition of the drive shaft. A first correction information generating circuit generates, based on the output of the marker sensor, correction information for correcting the position of the belt. A second correction information generating circuit generates, based on the output of the rotation condition sensor, correction information for correcting the rotation condition of the drive shaft. A controller controls the movement of the motor in accordance with the correction information output from the first and second correction information generating circuits.

Halftone cells each serving as a unit for formation of a dot are arranged in irregular shapes at random and divided into two groups. The halftone cells (720) in the first group are fewer than the halftone cells (730) in the second group and dispersed, and the area of each of the halftone cells (720) in the first group is set larger than that in the second group. The dot growth speed of the halftone cells (720) in the first group is higher than that of the halftone cells (730) in the second group. This allows formation of fine halftone dots consisting of the halftone cells in the first and second groups, and it is possible to reduce banding appearing in a main scan direction during recording of the halftone dots, with low-frequency components in spatial frequency of the halftone dots caused by the halftone cells (720) in the first group.

There is provided an image forming apparatus comprising: detection means for detecting position information eating a scanning position; interval prediction means for predicting a first scanning line interval indicating a distance in the sub-scanning direction between the scanning line of interest and a succeeding scanning line to be scanned after the scanning line of interest; interval calculation means for calculating, by using the position information held by the holding means, a second scanning line interval indicating a distance in the sub-scanning direction between the scanning line of interest and the scanned scanning line; and rate calculation means for calculating a correction rate on an exposure amount for the scanning line of interest so that a predicted density calculated using the first scanning line interval and the second scanning line interval matches with a predicted density calculated using a predetermined reference scanning line interval.

When there is an access passing between unit disk controllers, the band of a mutual connecting network must be very large in order to exhibit the performance sufficiently, so that the cost is increased. In the present invention, the access number of a logical volume is monitored, the change of an access path is suggested to an upper class device, and the logical volume is moved or copied to each unit disk controller, so that the mutual connecting network is used mainly for copy of the logical volume, thereby reducing the necessary band.

The invention relates to a pigment-based ink composition for inkjet printing the ink composition pigment particles, wherein said ink composition has a filterability of at least 80% wherein filterability is determined by the following test; a sample of said pigment-based ink is divided into four 100 ml aliquots and a first aliquot is filtered through a chemically inert membrane having a porosity of 1.0 μm and a diameter of 47 mm and using a vacuum of 20 inches of Hg and measuring the time it takes to complete the filtration, T1, a second and third aliquot are sequentially passed through the same filter under the same filtering conditions, the fourth aliquot is then passed through the same filter under the same conditions while measuring the time it takes to complete the filtration of the fourth aliquot, T4, the time of T1 is divided by T4 and multiplied by 100 to obtain the filterability.

Halftone cells each serving as a unit for formation of a dot are arranged in irregular shapes at random and divided into two groups. The halftone cells (720) in the first group are fewer than the halftone cells (730) in the second group and dispersed, and the area of each of the halftone cells (720) in the first group is set larger than that in the second group. The dot growth speed of the halftone cells (720) in the first group is higher than that of the halftone cells (730) in the second group. This allows formation of fine halftone dots consisting of the halftone cells in the first and second groups, and it is possible to reduce banding appearing in a main scan direction during recording of the halftone dots, with low-frequency components in spatial frequency of the halftone dots caused by the halftone cells (720) in the first group.

As in a normal storage system, an application run on a host issues a data write command or a data read command. A monitor unit monitors the host and a command issued by the host to detect a re-startable point to issue the re-startable point notification to a source storage system. Using the re-startable point as a momentum, the source storage system converts a command stored in a buffering unit into a command for transfer in which redundant data transfer has been curtailed to transfer the command for transfer to a destination storage system. The destination storage system applies the received command to a storage unit. At this time, the command for transfer is restored to an ordinary command which is applied.

An illumination system includes a backlight housing, a plurality of light valves coupled to the backlight housing, and a plurality of light sources arranged in the backlight housing and optically coupled to the light valves. The illumination system may further include a light-scattering substrate optically coupled between the plurality of light sources and the light valves, and a plurality of light modulating dots patterned on the substrate to modulate transmitted intensity of light from the plurality of light sources to achieve increased luminance uniformity by decreasing banding caused by the separated light sources. The light modulating dots may include comprise reflective dots, transmissive dots, absorptive dots, or a combination thereof.

This invention is intended to reduce a line rate of a monitoring line necessary for transmission of a picture feature without complicating a system. A video signal xi (n0, n1) of each block is subjected to spread spectrum by multiplying the video signal xi(n0, n1) by a PN sequences SPN1 (n0, n1) (in a step S1). The resultant video signal is orthogonally transformed by DFT, DCT, WHT, or the like (in a step S2). An amplitude component Ai=|Xi(SE0, SE1)| of an arbitrary component (SE0, SE1) in a coefficient Xi(S0, S1) obtained by the steps S1 and S2 is extracted (in a step S3), and the extracted amplitude component is quantized with a step size M (in a step S4). The picture feature F[i] is given as a residue obtained under a modulus Nm of a quantized typical value obtained by the quantization (in the step S4) (in a step S5).

There is provided an image forming apparatus comprising: detection means for detecting position information indicating a scanning position; interval prediction means for predicting a first scanning line interval indicating a distance in the sub-scanning direction between the scanning line of interest and a succeeding scanning line to be scanned after the scanning line of interest; interval calculation means for calculating, by using the position information held by the holding means, a second scanning line interval indicating a distance in the sub-scanning direction between the scanning line of interest and the scanned scanning line; and rate calculation means for calculating a correction rate on an exposure amount for the scanning line of interest so that a predicted density calculated using the first scanning line interval and the second scanning line interval matches with a predicted density calculated using a predetermined reference scanning line interval.

The invention discloses a production method of a high H2S corrosion-resistant petroleum well casing pipe J55. The production method comprises the processes of steel making, continuous casting, heating, rolling, coiling, uncoiling, pipe making and heat treating. According to the production method of the high H2S corrosion-resistant petroleum well casing pipe J55, on the component design, low-content C, low-content P and low-content S are adopted to reduce banded segregation, and cracking and temper brittleness tendency are reduced; the low-temperature toughness and the welding corrosion resistance of steel are improved through low-content O, low-content N and low-content H; Nb, Cr and Mo are added to form a passivation film, hydrogen is prevented from entering the passivation film, and thenthe effect of effectively inhibiting the hydrogen sulfide corrosion rate is achieved; and a TMCP rolling technology is adopted and combined with a low-temperature rolling technology, therefore, it isguaranteed that austenite phase transformation is generated at low temperature, ultrafine ferrite structures are obtained, and then production of the high H2S corrosion-resistant petroleum well casing pipe J55 is achieved. According to the production method, the safety performance of the petroleum well casing pipe industry is greatly improved, and the production method has the characteristics ofbeing low in product cost, excellent in comprehensive performance and the like.

An apparatus is arranged to generate sub-pixel drive values for sub-pixels of an autostereoscopic display. The display comprises a display panel (503) with the sub-pixels, and further comprises a view forming optical element (509), such as a lenticular screen, overlaid the display panel (503). The apparatus comprises a receiver (903) for receiving light output values for pixels of at least one image to be presented. A driver (905) generates the sub-pixel drive values. Specifically, it generates a first drive value for a first sub-pixel in response to a light output value for a pixel of which the first sub-pixel is a part, a sub-pixel value of at least one other sub-pixel and a cross-talk pattern reflecting sub-pixel cross-talk characteristics for sub-pixels of the autostereoscopic display. In addition, the sub-pixel drive values are biased towards extreme drive values, i.e. towards fully-on or fully-off values.

Provided are a device and method for reducing the banding phenomenon in subsampled images, and that achieve high picture quality. A subsampled image to which an adjoining pixel value is copied at thesubsampling position of the pixel value is made to serve as an input image, and global gain for the signal to be corrected, which is the ratio of the inclination of the signal to be corrected for theglobal area comprising a plurality of consecutive pixels including the pixel position of the pixel to be corrected in the input image to the inclination of the brightness signal, is calculated, localinclination of brightness, which is the inclination of the brightness signal of a local area smaller than the global area, which is within the global area and includes the pixel position of the pixelto be corrected of the input image, is calculated, local inclination of brightness is multiplied by the global gain of the signal to be corrected, and the multiplication results are applied to calculate the corrected pixel value for the pixel to be corrected. For example, the signal pixel value subject to correction on the edge of the local area is added to the multiplied value to calculate the corrected pixel value.

The present invention relates to an image forming apparatus comprising: an exposing means and a developing means. The developing means comprises a plurality of developing devices, a rotating member rotatable while supporting the plurality of the developing devices, and a driving means for the rotation drive of the rotating member for selectively moving the plurality of the developing devices to the developing position such that the driving means transmits driving force to the rotating member via a gear at a drive transmitting position. An angle θe(°) formed by a straight line linking the rotation center of the rotating member and the drive transmitting position and the tangent of the image bearing member at an exposing position in the image bearing member moving direction satisfies the following relationship with the premise that an pressure angle of the gear is α(°) and the image bearing member rotating direction is positive: −α≦θe≦α.

A family of microscopes include an illumination device which produces a planar light sheet along an illumination axis of an illumination beam path and a transverse axis normal to the illumination axis. A detection device detects light emitted from the sample region along an axis of detection of a detection beam path. The illumination and detection axes as well as the transverse axis and the axis of detection being oriented relative each other at an angle unequal to zero. A light sheet generator also produces rotationally symmetrical light and includes structure and control for rapidly scanning the sample region along the transverse axis. The illumination device includes a second light sheet generator having a first astigmatically active optical element with at least one astigmatic lens for producing a static sheet of light. Selection elements used to select either the first or the second light sheet or both together to produce the sheet of light.

Droplet ejection amounts are adjusted during a process of generating raster data, and this process is realized by a control circuit. The sum total of droplet ejection amounts exceeds 100% as for three nozzles while the sum total of droplet ejection amount is below 100% as for one nozzle, which is repeated at some nozzle numbers. The sum total of droplet ejection amounts is 100% in a normal portion. As such, in the case where this sum total is taken as a reference amount, the sum total of droplet ejection amounts for each raster in a region where overlap printing is performed is sequentially changed to be equal to or greater than the reference amount in the normal region where the overlap printing is not performed, and to be equal to or smaller than the above reference amount.

Droplet ejection amounts are adjusted during a process of generating raster data, and this process is realized by a control circuit. The sum total of droplet ejection amounts exceeds 100% as for three nozzles while the sum total of droplet ejection amount is below 100% as for one nozzle, which is repeated at some nozzle numbers. The sum total of droplet ejection amounts is 100% in a normal portion. As such, in the case where this sum total is taken as a reference amount, the sum total of droplet ejection amounts for each raster in a region where overlap printing is performed is sequentially changed to be equal to or greater than the reference amount in the normal region where the overlap printing is not performed, and to be equal to or smaller than the above reference amount.