摘要 :
Branch identification technology is a key technology to achieve automated pruning of fruit tree branches, and one of its technical bottlenecks lies in the stitching of branch images. To this end, we propose a set of branch image s...
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Branch identification technology is a key technology to achieve automated pruning of fruit tree branches, and one of its technical bottlenecks lies in the stitching of branch images. To this end, we propose a set of branch image stitching technology algorithms. The algorithm is based on the grey-scale prime centroid method to determine the detection feature points, and uses the coordinate transformation matrix H of the corresponding points of the image to carry out the image geometric transformation, and realises the feature matching through sample comparison and classification methods. The experimental results show that the matched point images are more correct and less time-consuming.
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This paper presents a method for synthesizing a stroboscopic image of a moving sports player from a hand-held camera sequence. This method has three steps: synthesis of background image,synthesis of stroboscopic image, and removal...
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This paper presents a method for synthesizing a stroboscopic image of a moving sports player from a hand-held camera sequence. This method has three steps: synthesis of background image,synthesis of stroboscopic image, and removal of player’s shadow. In synthesis of background image step, all input frames masked a bounding box of the player are stitched together to generate a background image. The player is extracted by an HOG-based people detector.In synthesis of stroboscopic image step, the background image, the input frame, and a mask of the player synthesize a stroboscopic image. In removal of shadow step, we remove the player’s shadow which negatively affects an analysis by using mean-shift. In our previous work, synthesis of background image has been timeconsuming. In this paper, by using the bounding box of the player detected by HOG and by subtracting the images for synthesizing a mask, computational speed and accuracy can be improved. These have contributed greatly to the improvement from the previous method.These are main improvements and novelty points from our previous method. In experiments, we confirmed the effectiveness of the proposed method, measured the player’s speed and stride length, and made a footprint image. The image sequence was captured under a simple condition that no other people were in the background and the person controlling the video camera was standing still, such like a motion parallax was not occurred. In addition, we applied the synthesis method to various scenes to confirm its versatility.
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It is essential to measure the stitch length of weft knitted fabric in a static environment for economy and improving productivity. The image inputted was dealt with the digital image processing techniques: the paper carded out th...
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It is essential to measure the stitch length of weft knitted fabric in a static environment for economy and improving productivity. The image inputted was dealt with the digital image processing techniques: the paper carded out the transformation of grey scale; then removed impurities with media filtering; the characteristic of the stitch structure was abstracted by using the Fourier transform technique. To obtain the stitch length more accurately, we should establish a geometric model of the stitch based on the digital image processing, which provides a way to transform the stitch length in the two-dimension space into a three-dimension space. This study provides a new method for measuring the stitch length without damaging the fabric.
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摘要 :
In the knitting industry the measurements of the stitchdensity and the stitch length are usually done manually,which may lead to lower efficiency and less definition and also bring subjective ideas into the test results. In order ...
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In the knitting industry the measurements of the stitchdensity and the stitch length are usually done manually,which may lead to lower efficiency and less definition and also bring subjective ideas into the test results. In order to improve the effect we can measure with Digital Image Processing Techniques. A piece of sample is scanned into computer and changed into a digital image, which is processed with media filtering. To acquire the powerspectrum, the image in the spatial domain is converted into the frequency domain. Picking up the characteristic points describing the stitch density and the stitch length separately in the power spectra and reconstructing them, the values of the stitch density and the stitch length could be calculated.When measuring the stitch length, we should establish a geometric model of the stitch based on the digital image processing, which provides a method to transform the stitch length in the two-dimension space into the three-dimension space and to measure the value of the stitch length more accurately. This method also provides a new way to measure the stitch length without damaging the fabric.
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In this review,we introduce some chip-based waveguide biosensing and imaging techniques,which significantly reduce the complexity of the entire system.These techniques use a well-confined evanescent field to interact with the surr...
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In this review,we introduce some chip-based waveguide biosensing and imaging techniques,which significantly reduce the complexity of the entire system.These techniques use a well-confined evanescent field to interact with the surrounding materials and achieve high sensitivity sensing and high signal-to-noise ratio(SNR)super-resolution imaging.The fabrication process of these chips is simple and compatible with conventional semiconductor fabrication methods,allowing high-yield production.Combined with recently developed chip-based light sources,these techniques offer the possibility of biosensing and super-resolution imaging based on integrated circuits.
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