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When one is speaking, lips change regularly. Therefore, Lip contour extraction is very meaningful. In this paper, for lip color images, this paper extracts lip contour by means of the RGB-based improved region growing algorithm. Through RGB three components, the relationship between color from and adjacent pixels is calculated. According to certain rules, seed pixels are automatically selected, and...
This paper presents the graphical chromatic representation of the phase and the magnitude of the transfer function G(s) of a system and its educational use in the design of the most typical controllers. The magnitude is represented in decibels and the phase is represented by colours. This representation permits to put a face to the transfer functions, deepening our intuitive understanding of transfer...
This paper addresses with the problem of contour line reconstruction extracted from scanned topographic maps since contour lines play a significant role on construction of Digital Evaluation Models (DEMs) and 3D simulations in serious fields. In this way, a semi-automatic hybrid method based on simple geometrical properties is proposed. The proposed hybrid method is designed by combining the two previously...
Although vision based road detection has been extensively studied in the past decades, road detection in adverse conditions still remains challenging. In this paper, we propose a road detection approach via superpixels and an automated version of interactive image segmentation. We first segment the input road image into superpixles, and we design a novel seed selection method based on multiple novel...
This paper presents a fast and accurate auto white balance scheme specifically suited for white balance (WB) correction in digital pathology applications. The scheme uses low-level statistics based technique for illuminant estimation and linear transformation method for image correction. The WB performance of the proposed scheme has been tested in various real life conditions and found to be within...
Most of conventional over-exposure correction methods fail to reconstruct the detail information of the overexposed region (OER) in an image. This paper presents a novel method which can effectively reconstruct the texture as well as the luminance and the color of the OER without user interaction. The proposed method is performed based on a patch-based region filling method. In a patch including the...
This work aims at designing a face detection system with high speed of processing and a reduced number of false positives compared to the well known Haar feature-based face detector developed by Viola and Jones. In this method, HS channels of HSV color space are logically combined for skin-color region extraction, then a blob-contour-property based filtering is used to indicate the optimum ROI (regions...
In this paper, a new method of detecting text regions from video sequences, without prior knowledge such as font, color, size of characters is proposed. By analyzing the characteristics of text regions in video sequences, we found that text regions include both horizontal and vertical edges simultaneously, while background regions do not. Therefore, In order to detect text regions accurately, the...
This paper proposes an algorithm to fix the tone inconsistency in captured video especially by mobile devices such as smartphone and black box cameras. We propose a method to stabilize the inconsistent tone of video frames in which tone is adjusted for each frame with adjustment map using several key anchor frames.
Vision based road detection is a key technique in Autonomous driving and Advance Drive Assistance System. We propose an approach for vision-based road detection which exploits road shape prior, color consistence representation and discrimination analysis. Firstly, road shape prior probability map is constructed from available road images which have been annotated by matching and classifying of road...
In a recent paper, the authors show that the sublattice of partial clones that preserve the relation {(0,0),(0,1),(1,0)} is of continuum cardinality on 2. In this paper we give an alternative proof to this result by making use of a representation of relations derived from {(0,0),(0,1),(1,0)} in terms of certain types of graphs. As a by-product, this tool brings some light into the understanding of...
HDR synthesis using the minimal number of source images is crucial for real-time applications. This paper identifies the color distortion problem associated with the minimum of two source images, and proposes a solution using the virtual frame composed in the pixel domain. Experimental results demonstrate satisfactory results.
Constructionism suggests that people learn particularly well when they are creating personally meaningful artifacts for an audience. Design-oriented construction kits can provide affordances for creative, open-ended exploration and creation, but their use can be difficult to incorporate in a classroom setting where many learners are working at different rates or may find certain aspects of the activities...
An effective color image fusion algorithm based on NSCT(Nonsubsampled contourlet transform) and Lαβ color space is proposed for visual and infrared night image fusion, aiming at traditional fusion method suffering from no rich details and no clear target. The NSCT is applied in fusion processing because of its good properties which include multi-scale, time-frequency localization, shift invariance,...
Inpainting is the process of reconstructing damaged parts of an image in a visually plausible way. Recently, digital image inpainting has been an active field of research in the area of image processing. Meanwhile, exemplar-based methods have had a major contribution in developing this field of research. The main idea in these methods is based on copy-and-paste texture synthesis. The time-complexity...
In this paper, we use centroid distance and axis of least inertia method for plant leaf classification. For this propose the RGB (Red, Green, Blue) image are converted to the binary image. Then, Canny operator is applied to the binary image to recognize the edges of the image before thinning the edges. After that, the boundary of the image is traced to sample the shape. Sampling helps us to avoid...
Computer Vision based systems have already been proposed to detect fire automatically. To increase the reliability of such systems, Gaussian Mixture Models of fire need to be developed in order to decide if an object in a scene is a fire or no. The models are trained using color images in RGB color model. We, however, believe HSV model is more suitable to present the statistics of a set of colored...
Cloud detection is an important subject for both present observatories and observatory site selection. Nowadays cloud detection using all sky cameras is the most promising method by the help of sophisticated cameras. In this work we propose a cloudiness analysis methods which uses all sky camera images. Daytime and night time imgaes were classified according to their present time duration, and different...
Contactless palmprint recognition systems alleviate the concerns on personal hygiene, acquisition flexibility, etc. Unfortunately, the preprocessing of contactless palmprint image faces several severe challenges, including unconstrained hand placement, complex background, light interference, etc. This paper proposes logical conjunction of triple-perpendicular-directional translation residual (TPDTR)...
Proper technology transfer based on scientific data is inevitable for farmers to promote sustainable agriculture which is a common target of modern food production. In under-developing countries, illiteracy of farmers is one of the major reasons for them to receive sufficient information and knowledge for such sustainable food production. In this study, we conducted a trial to examine effectiveness...
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