Showing 1-25 of 12,525 resultsfor "Index Terms":Height Images
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Person Segmentation in Human Height Measurement Using Bodypix
2022 6th International Conference on Electrical, Telecommunication and Computer Engineering (ELTICOM)
Year: 2022 | Conference Paper |
Cited by: Papers (1)
Image processing can be used to measure height. Most research in this measurement uses a place adjusted to the green screen background to facilitate image segmentation. Using a green screen background can facilitate the image segmentation process, but using the space in question is inefficient. In this paper, a height measurement experiment is carried out using the body pix module to segment image...Show More
The characterization of digital surface model from stereo imagery over vegetated areas
2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS
Year: 2013 | Conference Paper |
Cited by: Papers (1)
Some researches in the field of surveying and mapping showed that it held potentials to derive vegetation height from stereo imagery. However, most of current researches were conducted on aerial images or spaceborne images with very high resolutions (about 0.5 m). The resolution of stereo sensors with global coverage is always not so high. The characteristics of digital surface models (DSMs) shoul...Show More
An Algorithm for Estimation of Wave Height From Shadowing in X-Band Radar Sea Surface Images
Directional wave spectra and integrated wave parameters can be derived from X-band radar sea surface images. The calibration of such spectra has until now depended on various empirical and semiempirical methods, which also require an external reference increasing the total expenses of operation. A novel algorithm, which is fully based on theory, producing reasonable estimates of the significant wa...Show More
Image Recovery from Broken Image Streams
Xiaoyu Zhao;Chi Xu;Zheru Chi;Hong Yan;David Dagan Feng;Gang Chen
2007 IEEE International Conference on Image Processing
Year: 2007 | Conference Paper |
Cited by: Papers (2)
This paper presents an approach for image recovery from broken image streams based on an image continuity model. The information to be recovered includes the header of an image (width, height, color space etc.) and the data stream which might have been partially damaged. We begin our discussion on common image formats and necessary information for the image recovery. We then define several measure...Show More
A fast implementation of the minimum spanning tree method for phase unwrapping
A new implementation of the minimum spanning tree (MST) phase unwrapping method is presented. The time complexity of the MST method is reduced from O(n/sup 2/) to O(n log/sub 2/ n), where n is the number of pixels in the phase map. Typical 256/spl times/256 phase maps from magnetic resonance imaging can be unwrapped in seconds, compared with tens of minutes with the O(n/sup 2/) implementation. Thi...Show More
Development of a Framework for Stereo Image Retrieval With Both Height and Planar Features
The wide availability and increasing number of applications for high-resolution optical satellite stereo images (HrosSIs) have created a surging demand for the development of effective content-based image retrieval methods. However, this is a challenge for existing stereo image retrieval methods since they were designed for stereo images collected from close-range imaging sensors. Thus, successful...Show More
Tree height measurement based on image processing embedded in smart mobile phone
2011 International Conference on Multimedia Technology
Year: 2011 | Conference Paper |
Cited by: Papers (4)
This paper concerns the problem of tree height measurement based on image processing embedded in smart mobile phone. A smart phone with camera and a benching marking were used to in our method. Before the tree photo was taken, a benching marking with red colored ends was leaned on the tree closely and parallel to tree trunk. Then the top point of the tree image was extracted according to their col...Show More
Height Measurement of Micro-Solder Balls on Metal Pad by White Light Projection
Micro-solder balls are commonly used in wafer-level ball grid array (BGA) packages as an interconnection medium. To measure the height of a micro-solder ball on a metal pad, we propose a white light projection method to avoid interference from pads in the shadow of the ball. The optical projection of a solder ball under the illumination of a parallel white light beam is studied, and the relationsh...Show More
Height measurements in images: how to deal with measurement uncertainty correlated to actual height
The accuracy of body height estimations in images may be validated by performing height measurements on test persons of known height on images taken under similar conditions. The observed differences between actual and measured heights of test persons are then used to adjust the measurement on the perpetrator, leading to a confidence interval for his actual height. The statistical model used in ca...Show More
Terrain Target Height Reconstruction via Terahertz DBS Forward and Down Looking Imaging
Yuanfeng Li;Qi Yang;Xiaoqiang Hua;Hongqiang Wang;Bin Deng;Yang Zeng
2024 IEEE MTT-S International Wireless Symposium (IWS)
Year: 2024 | Conference Paper |
In this letter, a terrain target height reconstruction method based on terahertz Doppler beam sharpening (DBS) imaging is proposed. Specifically, the two-dimensional image of range-pitch angle in terrain scanning area is acquired using the DBS method. The range between the target and platform can be acquired by resort to the pulse compression of echo signal. Since targets at different positions wi...Show More
Measurement of Dense-Phase Bed Height in CFB Boiler Based on Flame Image Processing Technique
2009 International Conference on Measuring Technology and Mechatronics Automation
Year: 2009 | Conference Paper |
Cited by: Papers (1)
This paper proposes a method to measure the dense-phase bed height by edge-detection of Charge Coupled Device based on flame image processing technique in Circulated Fluidized Bed (CFB) boiler. The detection system was installed in a 480t/h CFB boiler, image processing model has been built,and in-situ experiment was carried out. Real-time bed height is reliable and meets the bed pressure drop exac...Show More
An Improved Iterative Simulation and Matching Scheme for Building Height Retrieval From SAR Image
Wenchao Li;Xiaojun Tao;Dan Liu;Lei Wang;Zhongyu Li;Junjie Wu;Jianyu Yang
Retrieval of building height from synthetic aperture radar (SAR) image is of great significance for damage assessment after natural disasters, urban development and planning, and dynamic time series monitoring in urban areas. Based on the prior information of the building and the radar platform, the building height can be estimated by iteratively simulating the SAR image and matching it with the m...Show More
Canopy Height Model (CHM) Derived From a TanDEM-X InSAR DSM and an Airborne Lidar DTM in Boreal Forest
The first global X-band spaceborne single-pass interferometer mission, TanDEM-X, provides a spatially continuous map of global canopy elevations. In this paper, we assess the use of TanDEM-X data, in combination with an external digital terrain model (DTM), to map boreal canopy heights. A comparison of the TanDEM-X canopy height model (CHM) to a validated reference lidar CHM was performed based on...Show More
Real-Time Multiple Human Height Measurements With Occlusion Handling Using LiDAR and Camera of a Mobile Device
The measurement of height is a crucial indicator for assessing health and making informed decisions in various fields. Using a depth camera for height measurement has become popular due to its convenience and efficiency, as it does not require physical contact. However, this method has limitations, such as needing an unobstructed view of the body. To address this, we propose a height measurement m...Show More
Planar visual fusion scintigraphy
The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Year: 2004 | Conference Paper |
Cited by: Papers (1)
Planar scintigraphy, while providing useful information about the distribution of a particular radiopharmaceutical being imaged, often does not provide adequate information about the surrounding anatomical structures, thereby complicating diagnosis. We have therefore explored a means of fusing planar scintigraphic images with visual photographic images to supply an anatomic correlate to regions of...Show More
The non-contact human-height measurement scheme
2011 International Conference on Machine Learning and Cybernetics
Year: 2011 | Conference Paper |
Cited by: Papers (2)
There are several methods used to measure human height; it includes contact and non-contact measurements. In this research, we develop a fixed laser point triangular distance measurement (FLPTDM) method to construct a non-contact human height measurement scheme. In our scheme, a laser beam was used for signal emission, and a digital camera was used as the signal detection. We calculate the distanc...Show More
Human Height Measurement by Square Template
Nattapol Suwatkittiwong;Theekapun Charoenpong;Chamaipom Sukjamsri;Taweechai Ouypornkochagom
2018 International Electrical Engineering Congress (iEECON)
Year: 2018 | Conference Paper |
Cited by: Papers (2)
Human height is significant information for human gait recognition. In this paper, we proposed a new method to measure the human height by using square template. This method consists of four step: image acquisition, template matching, background subtraction and human height measurement. First, human gait is captured. Square template is fixed on floor. Second, template matching is used to detect sq...Show More
Three-Dimensional Polygonal Building Model Estimation From Single Satellite Images
This paper introduces a novel system for automatic detection and height estimation of buildings with polygonal shape roofs in singular satellite images. The system is capable of detecting multiple flat polygonal buildings with no angular constraints or shape priors. The proposed approach employs image primitives such as lines, and line intersections, and examines their relationships with each othe...Show More
A Three-Dimensional Model-Based Approach to the Estimation of the Tree Top Height by Fusing Low-Density LiDAR Data and Very High Resolution Optical Images
Light detection and ranging (LiDAR) technology has been extensively used for estimating forest attributes. Although high-spatial-density LiDAR data can be used to accurately derive attributes at single tree level, low-density LiDAR data are usually acquired for reducing the cost. However, a low density strongly affects the estimation accuracy due to the underestimation of the tree top and the poss...Show More
Exponential Contrast Restoration in Fog Conditions for Driving Assistance
The images captured in fog conditions have degraded contrast, which makes current image processing applications sensitive and error prone. We propose in this paper an efficient single-image enhancement algorithm suitable for daytime fog conditions and, based on an original mathematical model, for computing the atmospheric veil, taking into account the variation in fog density to the distance. This...Show More
Fusion of WorldView-2 Stereo and Multitemporal TerraSAR-X Images for Building Height Extraction in Urban Areas
We investigated the joint use of the high-resolution WorldView-2 optical satellite images and the multitemporal TerraSAR-X synthetic aperture radar (SAR) satellite images to extract building height information in high-density urban areas. The main idea of the proposed fusion approach is to take full advantage of both data sets in building height retrieval. The proposed approach includes two main s...Show More
Tree height measurement based on image processing with 3-points correction
Proceedings of 2011 International Conference on Computer Science and Network Technology
Year: 2011 | Conference Paper |
Cited by: Papers (2)
This paper concerns the problem of tree height measurement based on image processing by 3-points correction. In the traditional method, two marker points were used, one was set on the root of the tree and the other was set one meter high from the root. A tripod was used to fix the camera for taking photos of the tree and the photo was made perpendicular to the ground, which have many restrictions ...Show More
Optimization of Urban Elevation Accuracy by Combining Laser Altimetry and Stereoscopic Imaging
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium
Year: 2023 | Conference Paper |
Cited by: Papers (2)
The GF-7 satellite, launched in November 2019 and put into use in August 2020, operates on a sun-synchronous orbit and is equipped with two linear array stereoscopic cameras capable of obtaining images up to 20 kilometers wide with a spatial resolution better than 0.8 meters. Its mission is to perform stereoscopic mapping at a scale of 1:10,000 using a combined survey mode of stereoscopic cameras ...Show More
Enhancement of Coupled Multichannel Images Using Sparsity Constraints
We consider the problem of joint enhancement of multichannel images with pixel based constraints on the multichannel data. Previous work by Çetin and Karl introduced nonquadratic regularization methods for SAR image enhancement using sparsity enforcing penalty terms. We formulate an optimization problem that jointly enhances complex-valued multichannel images while preserving the cross-channel inf...Show More
Detection and Measurement of Fetal Anatomies from Ultrasound Images using a Constrained Probabilistic Boosting Tree
We propose a novel method for the automatic detection and measurement of fetal anatomical structures in ultrasound images. This problem offers a myriad of challenges, including: difficulty of modeling the appearance variations of the visual object of interest, robustness to speckle noise and signal dropout, and large search space of the detection procedure. Previous solutions typically rely on the...Show More
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