37 results about "Mean absolute value" patented technology

A method, image recognition system, computer program, etc., for determining image orientation. The invention classifies potential sky pixels in the image by color, identifies spatially contiguous regions of the potential sky pixels, identifies actual sky regions by eliminating ones of the spatially contiguous regions that have a texture above a predetermined texture threshold, computes desaturation gradients of the actual sky regions, classifies the image as one of portrait and landscape based on average absolute values of horizontal and vertical desaturation gradient of pixels within each of the actual sky regions, determines orientation of the image based on a polarity of the average horizontal and vertical desaturation gradients, and confirms that the actual sky regions are true sky regions by comparing the desaturation gradients with a predetermined desaturation gradient for sky.

A plating apparatus can form a bump having a flat top or can form a metal film having a good in-plane uniformity even when the plating of a plating object (substrate) is carried out under high-current density conditions. The plating apparatus includes a plating tank for holding a plating solution; an anode to be immersed in the plating solution in the plating tank; a holder for holding a plating object and disposing the plating object at a position opposite the anode; a paddle, disposed between the anode and the plating object held by the holder, which reciprocates parallel to the plating object to stir the plating solution; and a control section for controlling a paddle drive section which drives the paddle. The control section controls the paddle drive section so that the paddle moves at a velocity whose average absolute value is 70 cm/sec to 100 cm/sec.

An image forming apparatus including an image forming device, a transfer device, a fixing device, an inverting device, and a processor. The transfer device includes an intermediate transfer member, a nip forming member, and an electric potential difference generator to generate an electric potential difference between the intermediate transfer member and the nip forming member. The processor causes the electric potential difference generator to generate a first electric potential difference containing only a DC component when a toner image is transferred onto a first side of a recording sheet, and to generate a second electric potential difference containing a DC component and a superimposed AC component when the toner image is transferred onto a second side of the recording sheet. The second electric potential difference has an averaged absolute value per unit of time smaller than an absolute value of the first electric potential difference.

A system and method are disclosed for performing wavelet-based local texture feature extraction and classification procedures. Image data is initially provided to include a query image and a series of test images. A feature detector calculates image parameters corresponding to the image data. The image parameters include mean absolute values, variance values, and texture angles. The feature detector utilizes the image parameters to calculate distance values that represent texture similarity characteristics between the query image and each of the test images. The feature detector then evaluates the distance values to determine one or more matching images from among the test images.

The invention belongs to the technical field of video coding, and in particular relates to an H.264/AVC (Advanced Video Coding) macroblock-level code rate control algorithm based on weight window models. By using spatial correlation of a window which is formed by macroblocks around a current macroblock, and time correlation of a window which is formed by a macroblock of on a previous frame, which is in same position as the current macroblock and macroblocks around the macroblock, a low-complexity prediction model of a mean absolute deviation (MAD) and a quantization parameter (QP) calculating model are provided. Based on the two models, the macroblock-level code rate control algorithm used for an H.264/AVC coder is provided. Shown by the experiments, the macroblock-level H.264/AVC code rate control algorithm based on the weight window models has higher peak signal to noise ratio (PSNR) and less bit deviation compared with a code rate control algorithm of H.264/AVC reference software.

A apparatus for detecting leakage of a liquid in a tank, where erroneous detection is suppressed and which is capable of fine and accurate display and warning that depend on the degree of increase and decrease in the quantity of the liquid. The apparatus performs a first liquid quantity variation detection for detecting liquid quantity variation based on a flow rate corresponding value that is calculated using an output of a flow rate sensor section and also performs a second liquid quantity variation detection for detecting liquid quantity variation based on a time variation rate of a liquid level that is measured by the pressure sensor. When it is determined in a first stage (S1) that an absolute value of the liquid quantity variation obtained by the second liquid quantity variation detection does not exceed a first predetermined value (C1), then, in a second stage (S2) after an intermediate stage (Si), an average absolute value of liquid quantity variation is obtained from liquid quantity variations that are obtained by the second liquid quantity variation detection of plural times. After that, when it is determined that the average absolute value exceeds a second predetermined value (C2) that is smaller than the first predetermined value, an average value of liquid quantity variation relating to the average absolute value of liquid quantity variation is outputted as a liquid quantity variation, and when it is determined that the average absolute value does not exceed the second predetermined value (c2), the liquid quantity variation obtained by the first liquid quantity variation detection is outputted.

An image forming apparatus includes a controller capable of performing a printing control and a cleaning control. In the printing control, developer images carried on the image carriers are transferred toward the opposing surface or a recording sheet by applying a transfer current between each of the image carriers and the transfer device. In the cleaning control, developer collected by the cleaning rollers is transferred toward the image carriers and the transfer device and collected by the cleaning device by applying a transfer current between each of the image carriers and the transfer device and switching an electric field established between the image carrier and the corresponding cleaning roller. The controller is configured to control the transfer current such that an average absolute value of the transfer current in the cleaning control is smaller than that in the printing control.

In a data processing method of a tire shape inspecting device of the present invention, a position immediately before the number of the undetected points becomes a predetermined, number or more is determined as a temporary range of upper and lower limit values. Meanwhile, an absolute value is obtained from a result obtained by performing a filtering process using a secondary differential filter on the surface height distribution information subjected to a zero point removing process, an average absolute value is calculated from the position of the first coordinate axis, and a threshold value for distinguishing the side wall surface is calculated. Then, the threshold value is compared with the average absolute value of the position of the first coordinate axis within the temporary range of the upper and lower limit values so as to determine the range of the upper and lower limit values.

The invention relates to an optimized energy storage configuration method for a wind power plant. The method comprises the steps: S1, obtaining a wind power historical model value by using parameter historical data and a traditional wind power prediction model; S2, obtaining a wind power historical error according to the wind power historical model value and the wind power historical measured value; S3, minimizing the average absolute value of the wind power historical errors of different prediction points in the same wind field to obtain the optimal correction amount of the wind power historical errors; S4, combining the wind power historical error with the optimal correction amount to obtain a wind power correction historical error; S5, obtaining the energy storage configuration capacityand the energy storage configuration power according to the wind power correction historical error. Compared with the prior art, the method improves the accuracy of the grid-connected planned power of the wind power plant, and reduces the required energy storage configuration capacity and power.

A method of estimating current SNR in a sequence of symbols, including receiving a signal representing an additive mixture y(t)=s(t)+n(t) of a sequence of phase-modulated symbols with fixed length and phase modulation s(t) and including white Gaussian noise (AWGN) n(t); separating quadrature components I_Y and Q_Y of the received signal in a quadrature mixer; determining a mean-square I_Y² of I_Y; determining a mean-square Q_Y² of Q_Y; determining a square/squared value of mean absolute value (modulus) |I_Y|²; determining a square of mean value for quadrature component ]Q_Y[², where values of the quadrature component Q_Y are averaged taking into account a sign of a symbol received in a channel; determining a current absolute value (vector length) for I_y²+Q_y²; determining the current SNR based on I_Y², Q_Y², |I_Y|², ]Q_Y[² and √{square root over (I_y²+Q_y²)}; and compensating for a systematic error of the current SNR.

The invention discloses an image LSB matching steganography secret key recovery method based on wavelet absolute moment. For every possible steganography secret key in a secret key space or a secret key dictionary, the following steps can be carried out sequentially: A, steganography information length estimated value L can be set, and the testing path(path k) having the length of L can be generated according to every possible steganography secret key k; B, the mean absolute value (Rk) of the wavelet absolute moment residuals of all positions in the testing path in the image to be detected and the mean absolute value (R'k) of the wavelet absolute moment residuals of all positions out of the testing path in the image to be detected can be respectively calculated; C, the difference value (dk) between the mean absolute value (Rk) and the mean absolute value (R'k) can be calculated; D, one or a plurality of steganography secret key/s corresponding to the maximum difference/s (dk) can be used as the recovered suspected steganography secret keys. Under the precondition of the embedded position only determined by the steganography secret keys, the suspected steganography secret keys can be determined.

The present invention discloses a quick selecting method for frame modes in video transferring code, the method is that: firstly, based on an average absolute value of number summation about non-zero DCT coefficients in each block of current grand block, accounting the coefficients average value and the coefficients variance of the current grand block; secondly, according to the comparison of the coefficients average values and the coefficients variance with a threshold value, primarily determining the coding modes between frames; thirdly, based on the average absolute value of number summation about non-zero DCT coefficients in each block of current grand block, computing the weighted coefficients values of four blocks existed in current grand block; and finally, based on the comparison of the weighted coefficients values with the coefficients average values and the position of the block in current grand block, determining the final coding modes between frames. The present invention makes full use of the coded input video flow's character information in the video transferring codes, such as coefficients average values, coefficients variance and weighted coefficients values, to greatly reduce the computing complexity of video transferring codes with the basically invariable codes transferring efficiency.

The invention provides an arc welding method, which enables better ripple welds to be formed. The arc welding method comprises a step 1, where a welding current Iw, of which the mean absolute value is current value iw1, running through between a welding wire (15) and welding base material generates arc a and transfers droplets; a step 2, where a welding current Iw, of which the mean absolute value, current value is1, is smaller than the current value iw1, generates arc (a). The step 1 and the step 2 are carried out repeatedly. The arc welding method also comprises a step to maintain the arc (a) in a quenched state during a moment tv1 to a moment t3, wherein the tv1 is the moment when the arc (a) is quenched at the step 2 and the t3 is the moment when the next step 1 starts. In such a structure, the arc (a) is maintained in a quenched state during moment tv1 to a moment t3 until no arc (a) is generated at the moment t3. Therefore, damage to the appearance of a weld due to arc (a) regenerated before the moment t3 can be avoided, thereby forming a better ripple weld.

A motor generally has a contradictory relation between decrease of cogging torque and increase of torque density. To overcome this problem, continuous direction control is provided for anisotropy with modification of magnetic poles so that the average absolute value of differences between Mθ and 90×sin [φ{2π/(360/p)}] is set to be 3° or less, where Mθ is a direction of anisotropy with respect to a radial tangent line of a magnetic pole plane, φ is a mechanical angle, and p is the number of pole pairs.

The invention discloses a head wave acoustic transmission detection method. The width of a front period time interval and the width of a back period time interval are determined according to the resonance frequency of an acoustic sensor; the average absolute value of the acoustic waveform in the front period time interval is calculated, and the average absolute value in the front period time interval is recorded; the average absolute value of the acoustic waveform at the back period time interval of every time is calculated, and the maximum value of the average absolute value in the back period time interval is recorded; the characteristics amplitude ratio of every time is calculated, and the maximum value of the characteristic amplitude ratio is recorded; the equivalent signal noise rateis calculated; the existence of the head wave is judged according to the numerical relation between the maximum value of the characteristics amplitude ratio and the equivalent signal noise rate; under the condition that the existence of the head wave is judged, the half-wave of the corresponding data of the maximum value is the head wave obtained through the detection. The head wave acoustic transmission detection method has the advantages of easy operation, convenient operation and strong anti-interference ability during the detection of the head wave. The detection efficiency is improved, and obvious economical benefits are provided.