Correction of geometric distortions in line scanner imagery

A Line Scanner is an electro-optical imaging instrument that remotely senses and collects ground data. Such a sensor is commonly found on airborne or spaceborne platforms. Images acquired by the sensor reflect certain geometric distortions. Some of these distortions are caused by the geometry of the sensor and platform motion. It is desirable to remove geometric distortions from the acquired imagery prior to qualitative or quantitative interpretation. This research focuses on the most significant of these distortions -- roll, tangent, and V/H. A library of C algorithms has been implemented to remove the above mentioned distortions from the imagery. These algorithms are based on the sensor characteristics and information collected during the flight. Evaluation of the correction algorithms has been performed on synthetic imagery modeling an airborne line scanner. These initial test images were created with DIRSIG (Digital Imaging and Remote Synthetic Image Generator). The final phase of the validation will apply the algorithms to real imagery collected with the MISI (Modular Imaging Spectrometer Instrument) line scanner. From a scientific perspective, a sensitivity analysis has been performed on the involved flight parameters to identify potential sources of error

Optimal dictionary learning with application to underwater target detection from synthetic aperture sonar imagery

2014 Spring.Includes bibliographical references.K-SVD is a relatively new method used to create a dictionary matrix that best ts a set of training data vectors formed with the intent of using it for sparse representation of a data vector. K-SVD is flexible in that it can be used in conjunction with any preferred pursuit method of sparse coding including the orthogonal matching pursuit (OMP) method considered in this thesis. Using adaptive lter theory, a new fast OMP method has been proposed to reduce the computational time of the sparse pursuit phase of K-SVD as well as during on-line implementation without sacrificing the accuracy of the sparse pursuit method. Due to the matrix inversion required in the standard OMP, the amount of time required to sparsely represent a signal grows quickly as the sparsity restriction is relaxed. The speed up in the proposed method was accomplished by replacing this computationally demanding matrix inversion with a series of recursive "time-order" update equations by using orthogonal projection updating used in adaptive filter theory. The geometric perspective of this new learning is also provided. Additionally, a recursive method for faster dictionary learning is also discussed which can be used instead of the singular value decomposition (SVD) process in the K-SVD method. A significant bottleneck in K-SVD is the computation of the SVD of the reduced error matrix during the update of each dictionary atom. The SVD operation is replaced with an efficient recursive update which will allow limited in-situ learning to update dictionaries as the system is exposed to new signals. Further, structured data formatting has allowed a multi-channel extension of K-SVD to merge multiple data sources into a single dictionary capable of creating a single sparse vector representing a variety of multi-channel data. Another contribution of this work is the application of the developed methods to an underwater target detection problem using coregistered dual-channel (namely broadband and high-frequency) side-scan sonar imagery data. Here, K-SVD is used to create a more optimal dictionary in the sense of reconstructing target and non-target image snippets using their respective dictionaries. The ratio of the reconstruction errors is used as a likelihood ratio for target detection. The proposed methods were then applied and benchmarked against other detection methods for detecting mine-like objects from two dual-channel sonar datasets. Comparison of the results in terms of receiver operating characteristic (ROC) curve indicates that the dual-channel K-SVD based detector provides a detection rate of PD = 99% and false alarms rate of PFA = 1% on the first dataset, and PD = 95% and PFA = 5% on the second dataset at the knee point of the ROC. The single-channel K-SVD based detector on the other hand, provides PD = 96% and PFA = 4% on the first dataset, and PD = 96% and PFA = 4% on the second dataset at the knee point of the ROC. The degradation in performance for the second dataset is attributed to the fact that the system was trained on a limited number of samples from the first dataset. The coherence-based detector provides PD = 87% and PFA = 13% on the first dataset and PD = 86% and PFA = 14% on the second dataset. These results show excellent performance of the proposed dictionary learning and sparse coding methods for underwater target detection using both dual-channel sonar imagery

O potrzebie zmiany zakresu postępowania dowodowego w sprawach sądowoadministracyjnych

The aim of the article is to present arguments in favor of changing the current scope of evidence proceedings in administrative court cases. The taking of evidence in these cases is not independent in nature. The factual basis for adjudication by administrative courts are the administrative files of the case, which the administrative body transfers to the court together with the complaint and the response to the complaint. On the other hand, the evidentiary proceedings before the administrative court serve only to verify the completeness of the evidence collected in these files and the correctness of the findings of the authority in terms of the facts based on them. However, the current legal status is insufficient to achieve this goal. The article proposes directions for changes in this area. The need to separate a chapter devoted to the evidentiary proceedings was noticed. It was also postulated to extend the scope of these proceedings, and to allow the possibility of taking supplementary evidence from the document also outside the trial.  The aim of the article is to present arguments in favor of changing the current scope of evidence proceedings in administrative court cases. The taking of evidence in these cases is not independent in nature. The factual basis for adjudication by administrative courts are the administrative files of the case, which the administrative body transfers to the court together with the complaint and the response to the complaint. On the other hand, the evidentiary proceedings before the administrative court serve only to verify the completeness of the evidence collected in these files and the correctness of the findings of the authority in terms of the facts based on them. However, the current legal status is insufficient to achieve this goal. The article proposes directions for changes in this area. The need to separate a chapter devoted to the evidentiary proceedings was noticed. It was also postulated to extend the scope of these proceedings, and to allow the possibility of taking supplementary evidence from the document also outside the trial.  Celem artykułu jest wskazanie argumentów przemawiających za zmianą obecnego zakresu postępowania dowodowego w sprawach sądowoadministracyjnych. Postępowanie dowodowe przeprowadzane w tych sprawach nie ma charakteru samoistnego. Podstawę faktyczną orzekania przez sądy administracyjne stanowią bowiem akta administracyjne sprawy, które organ administracji przekazuje sądowi wraz ze skargą i odpowiedzią na skargę. Natomiast postępowanie dowodowe przed sądem administracyjnym służy jedynie weryfikacji kompletności materiału dowodowego zgromadzonego w tych aktach oraz prawidłowości opartych na nich ustaleń organu w zakresie stanu faktycznego. Aktualny stan prawny jest jednak niewystarczający do osiągnięcia tego celu. W artykule zaproponowano kierunki zmian w tym zakresie. Dostrzeżono potrzebę wyodrębnienia rozdziału poświęconego postępowaniu dowodowemu. Postulowano także poszerzenie zakresu tego postępowania, a ponadto dopuszczenie możliwości przeprowadzenia dowodu uzupełniającego z dokumentu także poza rozprawą

Another Cookie

Another Cookie is an animated 3D graduate thesis film. It is based on a personal story about a girl who loses her grandfather and learning to live with the lessons he left behind. She has help overcoming this grief from a spirit that represents the humor and happiness of the relationship between the girl and her grandfather. Cookies are at the heart of this story. In the film, there is a plate of cookies at the end of a table full of baking items. Two characters start taking cookies from the plate. A girl and her grandpa are holding a cookie in each hand, cherishing the moment. We then find out this is just a memory and the mood of the story changes to the girl’s grief. She is packing up a box of items which include recipes, photos, a spatula, and more. Once she closes the box, a spirit appears. It interacts with some items in the box and then eventually looks outside the box. It sees the girl sad and hopes to cheer her up. After a failed first attempt, the spirit kicks a soccer ball towards the girl. The girl kicks the ball away, hitting the shelf that the box is on, and it comes tumbling down. The girl is left to pick up the contents of the box and to face her grief. She gathers the contents, including a cookie recipe and a spatula. She goes to the counter and starts baking. When the cookies are done, she picks one up and goes for another, but hesitates. The spirit brings the attention of the girl to a photo of her and her grandpa with cookies in each hand. This inspires her to grab another cookie and to start living with the lessons her grandpa left behind