Scaling

Duration: 7 min

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Inside: a video lesson and guided study material.

Module outline

  1. About Course: UPPSC Course Overview
  2. Interview Preparation & Guidance: Interview Preparation
  3. Paper 1 | General Hindi: भाषा, लिपि, ध्वनि, वर्ण, अक्षर, स्वर, व्यंजन, मात्रा और संयुक्ताक्षर, वर्तनी, वर्ण-विन्यास, अनुस्वार, अनुनासिक, चंद्रबिंदु और ‘र’ के रूप, शब्द, पद और शब्द-भेद, संज्ञा और सर्वनाम, विशेषण और क्रिया, लिंग, वचन, पुरुष और कारक, काल, वाच्य, वाक्य और वाक्य-भेद, वर्णमाला, समास, संधि, Multi-Topic Content (Cross-Concept Material), हिन्दी की ध्वनि और स्वनिम व्यवस्था, प्राचीन और मध्यकालीन भारतीय आर्यभाषाएँ, काव्य के लक्षण, हेतु और प्रयोजन, हिन्दी की रूप रचना, हिन्दी शब्द रचना, हिन्दी साहित्येतिहास दर्शन, भक्तिकालीन काव्यधाराएँ, भारतीय काव्यशास्त्र की परंपरा, भारतीय नवजागरण और स्वाधीनता आंदोलन, अन्य गद्य विधाएँ एवं प्रवासी साहित्य, निर्धारित उपन्यासों का तुलनात्मक अध्ययन, गोदान, हिन्दी कहानी का विकास, स्वातंत्र्योत्तर और नयी कहानी, हिन्दी निबंध का विकास, शुक्लोत्तर निबंध, द्विवेदी और शुक्ल युग के निबंध, हिन्दी की संवैधानिक स्थिति, आधुनिक भारतीय आर्यभाषाएँ और हिन्दी का उद्भव, हिन्दी भाषा प्रयोग के विविध रूप, रीतिकाल, जीवनी, द्विवेदी युग और छायावाद, रीति, वक्रोक्ति और औचित्य सिद्धान्त, शब्दशक्ति और ध्वनि सिद्धान्त, रस सिद्धान्त और साधारणीकरण, उत्तर आधुनिकतावाद, लोहिया दर्शन, हिन्दी उपन्यास का विकास, हिन्दी नवजागरण, अंबेडकर दर्शन, आदिकाल, प्रयोगवाद और नयी कविता, छायावादी काव्य: प्रसाद और निराला, प्रगतिवाद से समकालीन कविता, निर्गुण भक्ति काव्य, द्विवेदीयुगीन काव्य, रीतिकालीन काव्य, आरंभिक हिन्दी उपन्यास, स्वातंत्र्योत्तर उपन्यास, आत्मकथा, स्वाधीनता-पूर्व प्रेमचंदोत्तर उपन्यास, निर्धारित कहानियों का तुलनात्मक अध्ययन, साठोत्तरी नाटक, प्रसाद और प्रसादोत्तर युग के नाटक, भारतेन्दु युगीन नाटक, स्वातंत्र्योत्तर नाटक, भारतेन्दु युगीन निबंध, संस्मरण और रेखाचित्र, व्यंग्य, एक साहित्यिक की डायरी, संस्कृति के चार अध्याय, सगुण भक्ति काव्य, हिन्दी नाटक, एकांकी और रंगमंच, आधुनिक गद्य और हिन्दी नवजागरण, अलंकार सिद्धान्त, हिन्दी आलोचना का विकास, भक्ति आंदोलन, कल्पना, बिम्ब, प्रतीक, मिथक और फंतासी, नयी कविता का विस्तार और साठोत्तरी कविता, उत्तर-छायावादी और प्रगतिवादी काव्य, काव्यगुण और काव्यदोष, प्लेटो, अरस्तू और पाश्चात्य परंपरा, मार्क्सवाद, स्वच्छन्दतावादी काव्यशास्त्र, आधुनिक पाश्चात्य आलोचना, भाषा और भाषा परिवार, देवनागरी लिपि
  4. Paper 2 | General Studies: State Wise GK, Polity, Geography, History, GK- Current Affairs
  5. Paper 1 | Programming Language: Language Design, C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++
  6. Paper 1 | Database Management Systems: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, ORDBMS, NoSQL
  7. Paper 1 | Cyber Security: Society, Law & Ethics, Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Electronic Data Interchange and E-Commerce, Physical Security and Cryptography Basics, Intrusion Detection Systems (IDS), Cyber Safety and Security, Ethical Hacking, कंप्यूटर की मूल बातें और हार्डवेयर / Computer Fundamentals and Hardware, प्रत्यक्ष बोध / Literal Comprehension, कंप्यूटर सॉफ्टवेयर / Computer Software, निष्कर्षात्मक बोध / Inferential Comprehension, आलोचनात्मक बोध / Critical Comprehension, इंटरनेट और वर्ल्ड वाइड वेब / Internet and World Wide Web, ई-मेल और ऑनलाइन संचार / Email and Online Communication, साइबर सुरक्षा / Cyber Security, अपशिष्ट प्रबंधन / Waste Management, डिजिटल नैतिकता, बौद्धिक संपदा और समाज / Digital Ethics, IPR and Society, डिजिटल एवं नव माध्यम / Digital and New Media, क्लाउड और वितरित कंप्यूटिंग / Cloud and Distributed Computing, शोध नैतिकता / Research Ethics, उभरती प्रौद्योगिकियाँ / Emerging Technologies, शिक्षा और शासन में ICT / ICT in Education and Governance
  8. Paper 1 | Computer Organization and Architecture: Basics of COA, Programming the Basic Computer, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Register Transfer and Microoperations, Control Unit Design
  9. Paper 1 | Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security
  10. Paper 1 | Design and Analysis of Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  11. Paper 1 | Data Structures: Introduction to DS, Array, Linked List, Stack, Queue, Tree, Graphs, Hashing
  12. Paper 1 | Discrete Structures and Theory of Logic: क्रमचय, संचय एवं प्रायिकता / Permutation, Combination and Probability, Set Theory, Relations, Functions, Propositional and Predicate Logic, Graph Theory, Group Theory
  13. Paper 1 | Software Project Management: Software Project Management
  14. Paper 2 | Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS, Linux OS, Security
  15. Paper 2 | Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment, Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Pushdown Automata & CFG, Complexity Theory
  16. Paper 2 | Artificial Intelligence & High Performance Computing: Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Planning, Multi Agent Systems, Natural Language Processing, Emerging Tech Trends
  17. Paper 2 | Image Processing: Digital Image Fundamentals, Image Enhancement, Image Restoration, Color Image Processing, Image Compression
  18. Paper 2 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  19. Paper 2 | Computer Graphics: Basics of Computer Graphics, 2-D Geometrical Transforms and Viewing, 3-D Object Representation, Geometric Transformations and Viewing
  20. Paper 2 | Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, HTML Basics, JavaScript-Basics, Java
  21. Paper 2 | Soft Computing: Fuzzy Sets, Artificial Neural Networks, Genetic Algorithms
  22. Paper 2 | Distributed System: Distributed Systems
  23. UPPSC Live Class Recordings: UPPSC Polytechnic Lecturer 2025 (CS)
  24. Previous Year Papers:
  25. Mock Test:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video provides a comprehensive lecture on geometric transformations in computer graphics, focusing on scaling and rotation. The instructor begins by defining a scaling transformation as an operation that alters the size of an object by multiplying the coordinates of its vertices by scaling factors, sx for the x-direction and sy for the y-direction. The mathematical formulas for this transformation are presented both as component equations (x' = x * sx, y' = y * sy) and in matrix form (P' = S * P). The lecture then transitions to rotation, explaining that it repositions points along a circular path around a pivot point. The component equations for rotation are given as p'x = px * cosθ - py * sinθ and p'y = px * sinθ + py * cosθ, which are also expressed in matrix form using the rotation matrix R. The video includes a worked example where a polygon with vertices A(0,3), B(3,3), C(3,0), and D(0,0) is scaled by a factor of 2 along the x-axis and 3 along the y-axis, demonstrating the calculation of new coordinates for each vertex. Finally, the video concludes with a 'Points to Note' section that summarizes key concepts, such as the effect of scaling factors (values < 1 reduce size, > 1 enlarge), the difference between uniform and non-uniform scaling, and the fact that a scaling factor of 1 leaves the object unchanged.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video begins with a slide defining a scaling transformation as an operation that alters the size of an object. It explains that this is done by multiplying the coordinate values (x, y) of each vertex by scaling factors sx and sy to produce new coordinates (x', y'). The component equations are shown as x' = x * sx and y' = y * sy. The slide also presents the transformation in matrix form: [x'] = [sx 0] * [x] and [y'] = [0 sy] * [y], or P' = S * P. The instructor then transitions to the next topic, rotation, by introducing the component equations for rotation: p'x = px * cosθ - py * sinθ and p'y = px * sinθ + py * cosθ. A diagram illustrates a point P(x,y) being rotated to P'(x',y') around the origin by an angle θ, with the new coordinate system X', Y' shown. The slide also states that θ can be clockwise (-ve) or counterclockwise (+ve). The rotation matrix R is defined as [cosθ -sinθ; sinθ cosθ].

  2. 2:00 – 5:00 02:00-05:00

    The instructor continues to explain the rotation transformation. The slide shows the component equations for rotation: p'x = px * cosθ - py * sinθ and p'y = px * sinθ + py * cosθ. The matrix form is presented as P' = R * P, with the rotation matrix R defined as [cosθ -sinθ; sinθ cosθ]. The instructor emphasizes that θ can be clockwise (negative) or counterclockwise (positive). The diagram on the right shows a point P(x,y) being rotated to P'(x',y') around the origin, with the angle of rotation θ clearly marked. The instructor then transitions to a new slide titled 'Rotation', which defines rotation as repositioning all points in an object along a circular path in the plane centered at the pivot point. The slide includes a diagram showing a triangle being rotated, with angles of 30°, 45°, and 60° marked on the arc of rotation. The instructor then returns to the scaling transformation slide, which is used to introduce a worked example.

  3. 5:00 – 7:13 05:00-07:13

    The video presents a worked example on scaling. The slide shows a polygon with vertices A(0,3), B(3,3), C(3,0), and D(0,0). The task is to find the new coordinates after scaling by a factor of 2 along the x-axis and 3 along the y-axis. The instructor calculates the new coordinates for each vertex. For point A(0,3), the new coordinates are (0*2, 3*3) = (0,9). For point B(3,3), the new coordinates are (3*2, 3*3) = (6,9). For point C(3,0), the new coordinates are (3*2, 0*3) = (6,0). For point D(0,0), the new coordinates are (0*2, 0*3) = (0,0). The slide then transitions to a 'Points to Note' section. This section explains that any positive numeric values can be assigned to scaling factors. Values less than 1 but greater than 0 reduce the size of objects, while values greater than 1 produce an enlargement. Scaling factors less than 1 move objects closer to the origin, while factors greater than 1 move them farther away. A value of 1 for both sx and sy leaves the size unchanged. When sx and sy are equal, it results in uniform scaling, which maintains relative object proportions. Unequal values result in non-uniform scaling.

The video provides a structured and comprehensive lesson on two fundamental geometric transformations in computer graphics: scaling and rotation. It begins by establishing the mathematical foundation for scaling, defining it as a process of resizing an object by multiplying its vertex coordinates by scaling factors. The lecture clearly presents the transformation equations in both component and matrix forms, emphasizing the role of the scaling matrix S. The concept is then applied through a detailed, step-by-step worked example, demonstrating how to calculate the new coordinates of a polygon's vertices after scaling. The video then transitions to rotation, defining it as a circular repositioning of points around a pivot. It provides the corresponding mathematical formulas and matrix representation, using a diagram to illustrate the concept. The lesson concludes with a summary of key principles in the 'Points to Note' section, which clarifies the effects of different scaling factor values, the distinction between uniform and non-uniform scaling, and the impact of scaling on the object's position relative to the origin. This progression from definition to formula to practical application ensures a thorough understanding of these core concepts.

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