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With the popularity of mobile and enhancement of mobile camera function, traditional digital cameras and scanner functions are gradually replaced by mobile camera. There are a lot of APP on mobile and able to scan paper documents. For photographic image processing, determining the boundaries of the document area from the mobile image is the first and important step. For the traditional document image...
A novel hybrid algorithm has been proposed in this paper to detect raindrops, remove and then restore the image back ground in a single image. This new hybrid algorithm is framed based on K-Means clustering and Median filtering for the fast retrieval of Rain droplets from the single image. K-Means clustering algorithm is an efficient algorithm for image clustering. The algorithm proposed in this paper...
To solve the problem of huge computation in the solution process of using Hough Transform (HT), an improved HT algorithm based on Freeman criteria has been presented and used to locate window region for the envelope image successfully. The improved algorithm detects the whole image using a template with size of N*N and the center pixel of template, replacing other pixels in template, is calculated...
Efficiently, accurately and automatically positioning the ribs in CT images and giving tips of which rib it is on cross-sectional plane will be very helpful for doctor's clinical diagnosis. This paper presented a new method of automatic rib positioning and extraction in CT images. According to the anatomical characteristics of ribs, the first rib will presents as a sloping line gradually when we slice...
Line segment detection is widely used in image process and recognition field. Conventional Hough Transform (CHT) is one of the popular techniques to detect lines accurately. Randomized Hough Transform (RHT) decreases the huge computation of CHT, but the random samples produce large invalid samples, so it increases the time and space complexities. Another disadvantage of RHT is that some important...
According to the drawback of the traditional circle target extraction algorithm used by Hough Transform, such as computation complexity, low efficiency and etc, an new circle target extraction algorithm is proposed in this paper which can extract multiple circle targets with different radius at one time. First, the Average Absolute Difference is implemented to enhance the edge of the circle targets...
X-ray images are the essential aiding means all along in clinical diagnosis of fracture. So the processing and analysis of X-ray fracture images is particularly important. Extracting the features of X-ray images is a very important process in classifying fracture images according to the principle of AO classification of fractures. A proposed algorithm is used in this paper. First, use marker-controlled...
In the paper the evaluation of algorithms for determining graph vertices on the basis of binary images is presented. The covered algorithms employ the classic contour detection method as well as the Hough transform and the MPPM (minimum perimeter polygon method). The presented algorithms are the basis for image matching and determining the stereo correspondence of images. Stereo-pairs were acquired...
The recognition of the wheel rim is a crucial area for vehicle safety. We present a novel recognition method for the detection of wheel rim whose projective curve is an ellipse. An image preprocessing method including the Otsu algorithm to binary the gray image, removing spurious areas and region filling algorithm is introduced to segment the rim area correctly. Then the ellipse rim region is considered...
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