Highlight Removal in Spectral Images

Monissasovelluksissa on hyvin tärkeää vähentää valolähteen vaikutusta kohteen oikean värin havainnoimiseksi. Tämä on tarpeen mm. virtuaalisissa museoissa, telelääketieteessä, verkkokaupassa ja verkkorahassa. Tässä tutkielmassa on kehitetty tekniikkaa kirkkaiden heijastusten poistoon spektrikuvista. Työ sisältää katsauksen yleisen värillisen kuvan ymmärtämiseen, mihin perustuen analysoitiin erilaisia kirkkaiden heijastusten poistO'tekniikoita. Työssä kehitettiin uusi kirkkaiden heijastusten poistO'menetelmä, joka perustuu dikromaattiseen heijastus-malliin, joka kuvaa spektrisen datan objektin omaan väriin ja valaisevan valon väriin perustuen. Ehdotettu kirkkaiden heijastusten poistO'menetelmä hyödyntää erilaisia olemassaolevia menetelmiä, kuten pääkomponenttimenetelmää ja tiedon luokittelu-menetelmää. Yritys kehittää nopeasti toimiva algoritmi, joka myös suoriutuu tehtävästä hyvin, on onnistunut. Kokeet toteutettiin ehdotetun menetelmän mukaisesti ja toimivalla algoritmilla saatiin halutut lopputulokset. Edelleentyö sisältää ehdotuksia esitetyn algoritmin parantamiseksi.

An Image Enhancement Technique using MTF of Human eye

Image filtering is a highly demanded approach of image enhancement in digital imaging systems design. It is widely used in television and camera design technologies to improve the quality of an output image to avoid various problems such as image blurring problem thatgains importance in design of displays of large sizes and design of digital cameras. This thesis proposes a new image filtering method basedon visual characteristics of human eye such as MTF. In contrast to the traditional filtering methods based on human visual characteristics this thesis takes into account the anisotropy of the human eye vision. The proposed method is based on laboratory measurements of the human eye MTF and takes into account degradation of the image by the latter. This method improves an image in the way it will be degraded by human eye MTF to give perception of the original image quality. This thesis gives a basic understanding of an image filtering approach and the concept of MTF and describes an algorithm to perform an image enhancement based on MTF of human eye. Performed experiments have shown quite good results according to human evaluation. Suggestions to improve the algorithm are also given for the future improvements.

Understanding, Managing And Developing A Well-Being Service Brand

The aim of this study is to analyze and understand a well-being service brand. Brands most definitely are a hot topic of today’s business world. Companies have started to realize the importance of branding, especially when talking about product related industries. Branding of services is a relatively new concept, which has gained less attention within academic literature. Though there is no legal distinction between product and service brands, they both have their own characteristics and qualities. The focus of the study is especially on the current brand images of both internal and external stakeholder groups. Understanding these brand perceptions will help in managing and developing the brand, so that it becomes even stronger, more recognized, and unified. This study is a quantitative, semi hypothetic-deductive single case study. The data for this study was collected throughout an online survey. The respondents represent both internal stakeholders, in direct contact with the service, as well as external stakeholders, who have no previous history with the service brand. The respondents represent a wide age spread, and are also geographically diverse. The study relies on a Finnish context. The study provides numerous managerial takeaways, especially because of its wide scope, on a topic that has never before been studied. All findings strongly reflected existing service brand theory, in addition with making the findings implementable for the case company.

Brand attitudes influence on city brand image, and their impact on behavioral intention

The main objective of this Master’s Thesis was to examine the perceived city brand image of tourists and residents. It was aimed to accomplish by examining first the contribution of city attributes and marketing communications on forming brand attitudes, and then discover how the brand attitudes influence on city brand image. The impact of brand attitudes and city brand image on behavioral intention was also reviewed. The empirical part of the thesis was conducted with a quantitative method through online-based survey. The sample (n = 492) consisted of tourists and residents of the case city. The data was analyzed with statistical analyses by SPSS program. Brand attitudes, based on the main attributes, were calculated through multi-attribute attitude model. The results confirmed exposure to marketing communications has direct and positive influence on brand attitudes, especially the offline marketing communications. The findings revealed brand attitudes impact directly on city brand image perception. Brand attitudes and brand image dimensions had direct impact on tourists and residents’ behavioral intention. The findings provide important information for the city marketers. They increase marketers understanding on how target population perceives the city brand image and how it impacts on their future behavior. This thesis reveals the perception of current city brand image and gives guidance on what to emphasize in city branding to increase city’s attractiveness in conjunction with its economic development. Furthermore, the created framework can be utilized also in the future researches.

University Image vs. University Identity: Congruence between Expectations and Experience

The aim of this thesis was to examine congruencies between university identity and university images of prospective and current students. Therefore, factors essentially influencing on expected and experienced university images were identified. Providing an understanding on the differences in the formation of both concepts allowed the analysis of potential incongruities between a university’s identity and the perceptions its students hold. The study was conducted in July and August 2013 at Lappeenranta University of Technology by means of a web-based research survey. The sample consisted of 160 international Master’s degree students who were admitted in 2011, 2012 and 2013. Descriptive and multivariate statistical analysis methods were used to process the data. The results of the study indicated statistically significant incongruities between the case university’s identity and its students’ images. Further, the expected and experienced university images showed incongruities to each other. Deviations were additionally detected to be dependent on the students’ home regions. All in all, there is potential for an improvement of the students’ experiences resulting from a low perception of the student’s preparation for future job life.

Along-scan radiometric gradient in Landsat images: understanding the relation between floristic and remote sensing information in tropical forests

The along-scan radiometric gradient causes severe interpretation problems in Landsat images of tropical forests. It creates a decreasing trend in pixel values with the column number of the image. In practical applications it has been corrected assuming the trend to be linear within structurally similar forests. This has improved the relation between floristic and remote sensing information, but just in some cases. I use 3 Landsat images and 105 floristic inventories to test the assumption of linearity, and to examine how the gradient and linear corrections affect the relation between floristic and Landsat data. Results suggest the gradient to be linear in infrared bands. Also, the relation between floristic and Landsat data could be conditioned by the distribution of the sampling sites and the direction in which images are mosaicked. Additionally, there seems to be a conjunction between the radiometric gradient and a natural east-west vegetation gradient common in Western Amazonia. This conjunction might have enhanced artificially correlations between field and remotely-sensed information in previous studies. Linear corrections may remove such artificial enhancement, but along with true and relevant spectral information about floristic patterns, because they can´t separate the radiometric gradient from a natural one.

Improving Satellite Image Based Forest Inventory by Using A Priori Site Quality Information

Summary

Calibration of a desktop scanner and digital image analysis procedure for quantification of a root morphology

Selostus: Tasoskannerin ja digitaalisen kuva-analyysimenetelmän kalibrointi juurten morfologian kvantifioimiseksi

Calculation of wood volume and stem taper using terrestrial single-image close-range photogrammetry and contemporary software tools

Abstract

Stress intensity factor of wood from crack-tip displacement fields obtained from digital image processing

Abstract

Suurnopeuskuvaustekniikan soveltaminen hitsausvalokaaren tutkimuksessa

Työn tavoitteena oli suurnopeuskuvaustekniikan ottaminen osaksi Kemppi Oy:n tuotekehitystä. Työn teoriaosa sisältää hitsausvalokaaren ja lisäaineensiirtymisen teoriaa,sekä perehtymisen suurnopeuskuvaustekniikkaan ja siihen vaadittaviin laitteistoihin. Teoriassa tarkastellaan myös MIG/MAG -päittäisliitoksen olemassa oleviin pohjapalon hitsausprosesseihin. Kokeellisen osan tuloksena syntyi suurnopeuskuvaustekniikkaan pohjautuva tutkimusmenetelmä. Rakennetulla järjestelmällä nähtiin hyvin teoriassa esitetyt MIG/MAG -hitsauksen kaarityypit ja lisäaineensiirtymisen muodot. Kuvattuja tuloksia kyettiin analysoimaan ja vertaamaan teoriaan. Päittäisliitoksen pohjapalon hitsaukseen soveltuvan prosessin kehitys oli osa käytännön osuutta. Tehdyillä kuvauksilla onnistuttiin havainnoimaan kehitetyn valokaaren ja aineensiirtymisen ilmiöitä. Näiden ymmärtäminen helpottui kuvauksien ansiosta ja tämä nopeutti ja mahdollisti tuotekehitystyötä. Tuloksena valmistui uusi pulssitettu lyhytkaariprosessi. Työn tuloksena syntyi uusi suurnopeuskuvaustekniikkaan nojautuva tuotekehitysprosessi, jossa uusi tekniikka kyetään liittämäänosaksi tutkimus- ja kehitystyötä. Tuloksia voidaan käyttää myös markkinoinnin ja myynnin edistämiseen.