3d imaging using matlab Essay Example | Topics and Well Written Essays - 5000 words

3d imaging using matlab - Essay Example However, none of these algorithms succeed to process more than a few tens of images when the amount of missing elements reaches 90% of the measurement matrix and cameras have large field of view (Martinec & Pajdla 2005). (Martinec & Pajdla 2005) proposes an algorithm has the following advantages: First, it provides an overall scene structure in a single step without requirements such as linear ordering of images in a sequence. Second, the solution is obtained as a global optimum of a reasonable cost function defined on an approximation to the original SFM (structure-from-motion) problem. (Martin & Doerry 2005) modify the existing Polar Format MATLAB implementation utilizing the Chirp Z-Transform that improves performance and memory usage achieving near real-time results for smaller apertures. They also add two new image formation options that perform a more traditional interpolation style image formation. These options allow the continued exploration of possible interpolation methods for image formation and some preliminary results comparing image quality are given. In this paper we review the principles used in reconstruction of three dimension images from two dimension images from a digital camera. The reconstruction algorithm of Synthetic Aperture Radar (SAR) is presented and implemented in MATLAB in the following sections. This section overviews the process of representing a three-dimensional world into a two-dimensional representation. The projection process loses one dimension. This process is usually central projection in which a ray from a point in space is drawn from a three dimension world point through a fixed point in space, the centre of projection. This ray will intersect the chosen plane as the image plane. The intersection of the ray with the image plane represents the image of the point. This projection is similar to the camera in which a ray of light from a point in the world passes through the lens of a camera

Writing Response to Freire Article Essay Example | Topics and Well Written Essays - 500 words

Writing Response to Freire Article - Essay Example Freire was capable of weaving together, and draw upon a number of components of taking into consideration practice and liberation. He used the term banking education to critique and describe the conventional system of education. This term depicts students as containers which are empty, and tutors must fill with information and knowledge. This process promotes lack of knowledge ownership and critical thinking in students, which in turn causes oppression. Additionally, he describes this education as one which the teacher is the subject and students as passive objects (Freire 13). This makes education a course of depositing information to passive students. This paper will look at the banking concept of education. The article brings into focus a number of essential points. First, Freire highlights the notion of dialogue. His emphasis on dialogue has adversely affected those concerned with informal and popular education. According to him, dialogue should not be based on one individual act ing on another, but rather individuals cooperating with one another (Freire 43). He argues that much of education involves the educator depositing knowledge to the on e he or she is educating. Second, there is the issue of praxis. Praxis entails an informed action. Dialogue should not only be about increasing understanding but also to contribute to changing the world. Dialogue should also entail respect.