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This paper presents a framework for evaluating quality of video encoding algorithms. This technique works by collecting source videos, encoding the source videos with a given algorithm, and decoding the compressed sequences. The decoded video shall be measured with the original sources in a specific evaluation method and feedback to the algorithm. Under the guidance of this framework, an implementation...
Because of the non-uniform response of infrared focal plane arrays (IRFPA), non-uniformity correction is a key technology in IRFPA application. The two-point correction algorithm is widely used in practical applications, but there are some disadvantages. The detector's response will drift with time and temperature, correction parameters will drift with this accordingly. In order to acquire good quality...
To meet the demand for miniature camera lens, in this paper, there designed a new type of miniature plastic lens, which is made up of three lenses. The second surface of the first lens is designed as a diffractive surface. The diffractive lens is used to eliminate aberration. There has investigated the primary aberration about the systems expressed by PWC. The function relation among P, W, C, and...
This paper presents a video stabilization algorithm based on Scale Invariant Feature Transform and the improved RANdom SAmple Consensus (RANSAC) algorithm. Feature points of the video images are extracted using the SIFT algorithm, and then a compensation matrix is obtained using the improved RANSAC algorithm. Pre-detection is used to accelerate the computation by discarding those temporary models...
A calculation of exposure time based on the light measurement often refer to errors in the deepness space detection duo to darkness background of deepness space and over hundreds of kilometers between the camera and the target. However, the use of based on an auto-exposure statistic and compensation method overcome those defects that mentioned before. Consequently, average gray level in the object...
Based on SPSS 16.0, this paper analyzes the price correlation of ten kinds of rare earth oxides from December 2004 to May 2009 and gets the correlation coefficient matrix of these products. The result shows that there are varying degrees of price correlation between most of the rare earth oxides. And this result has practical significance for rare earth enterprises to arrange production activities...
For a large scale iron and steel enterprise, to optimize the purchasing cost without lowering the grade is difficult. To reduce the cost of hot metal is more effective than to reduce the purchasing cost. This paper uses the material distribution model combined with production process to change the hot metal cost of each BF, and then to reduce average cost of hot metal. The calculation results based...
This paper established a scheduling model using disjunctive graph and it was implemented in B works, where two casting machines were sharing the molten steel of two converters. The graph represented and satisfied constraints of buffer capacity and maximum residence time from hot metal's refining to casting. By means of heuristic algorithm based on maximum consecutive heats without outsourcing and...
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