手机camera的power noise问题，应该修改camera table的哪些参数啊？

alanzhu 2005-02-28 09:29:33

补充：我修改过gain value

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sugar_mfc 2005-04-21

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可以问你使用的sensor厂商的支持人员，一般他们都回给你满意的答复的。

auglyguy 2005-04-01

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锐度降低，色彩饱和度降低
夜景的话把桢率也降低

wxdl1981 2005-03-02

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UP.............................................

alanzhu 2005-03-02

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不顶也来看看吧

【视频教程】Hands-on Three.js 3D Web Visualisations-September 16, 2019.part2.rar Hands-on Three.js 3D Web Visualisations September 16, 2019 English | MP4 | AVC 1920×1080 | AAC 48KHz 2ch | 3h 46m | 968 MB eLearning | Skill level: All Levels Create stunning visualizations and 3D scenes using the Three.js library Three.js is the most popular JavaScript library for displaying 3D content on the web, giving you the power to display incredible models, games, music videos, and scientific/data visualizations in your browser and even on your smartphone! This course begins with a 3D beginner-level primer to 3D concepts and some basic examples to get you started with the most important features that Three.js has to offer. You’ll learn how to quickly create a scene, camera, and renderer and how to add meshes using the Geometry primitives included with the library. You’ll explore troubleshooting steps that will focus on some of the common pitfalls developers face. You’ll learn the very sophisticated animation system included with the library. The course concludes by introducing post-processing, essentially adding filters to your rendered scene, and GLSL, the shading language that is used by all materials included with the library. You’ll see how creating your materials is easier than you’d imagine using GLSL. By the end of this course, you’ll be able to quickly add advanced features to your 3D scenes, improve the way users interact with them, and make them look stunning. Learn Learn the basics of 3D applications: vertices, faces, meshes, cameras, and renderers Learn how to set up a Three.js web app: the scene, camera, and renderer Master the scene hierarchy and child-parent relationships, and how they affect the final location and orientation of objects Explore simple mesh shapes (such as boxes, spheres, cylinders, planes, and cones) using the Three.js library Learn how to source, create, and load complex assets, including textures Discover how to use the brilliant animation system that is part of the THREE.js library Add a post-processor to a rendered image, to make it look like an old film or a dot screenprint + Table of Contents 1 The Course Overview 2 Introducing the THREE.js website 3 D Basics 4 Your first THREE.js web page` 5 The THREE.js Editor 6 Debugging Your Pages 7 Let’s Keep It Simple – Starting with a Box 8 Materials One – Basic and Wireframe 9 Spheres and Cylinders 10 Materials Two – Lambert and Phong 11 Cones and Tori 12 Scene Hierarchy 13 Perspective Camera 14 Orthographic Camera 15 Dummy Cameras and Lerping 16 Complex Camera Paths 17 Ambient and Hemisphere Lighting 18 Directional and Point Lighting 19 Spot and RectArea Lighting 20 Adding Shadows to Your Scenes 21 Physically Correct Lighting 22 Online Sources of 3D Assets 23 Using Blender with THREE.js 24 The GLTFLoader Class 25 The FBXLoader Class 26 LatheGeometry and ExtrudeGeometry 27 The Basics of the Animation System 28 Skinned Meshes 29 Switching and Blending Animations 30 Splitting an Animation Clip 31 A WASD Control System for a Player Character 32 THREE.js Post Processing 33 Introducing GLSL – ShaderMaterial 34 Introducing GLSL – Vertex Shaders 35 Introducing GLSL – Importance of Noise Function 36 Introducing GLSL – Textures

【视频教程】Hands-on Three.js 3D Web Visualisations-September 16, 2019.part1.rar Hands-on Three.js 3D Web Visualisations September 16, 2019 English | MP4 | AVC 1920×1080 | AAC 48KHz 2ch | 3h 46m | 968 MB eLearning | Skill level: All Levels Create stunning visualizations and 3D scenes using the Three.js library Three.js is the most popular JavaScript library for displaying 3D content on the web, giving you the power to display incredible models, games, music videos, and scientific/data visualizations in your browser and even on your smartphone! This course begins with a 3D beginner-level primer to 3D concepts and some basic examples to get you started with the most important features that Three.js has to offer. You’ll learn how to quickly create a scene, camera, and renderer and how to add meshes using the Geometry primitives included with the library. You’ll explore troubleshooting steps that will focus on some of the common pitfalls developers face. You’ll learn the very sophisticated animation system included with the library. The course concludes by introducing post-processing, essentially adding filters to your rendered scene, and GLSL, the shading language that is used by all materials included with the library. You’ll see how creating your materials is easier than you’d imagine using GLSL. By the end of this course, you’ll be able to quickly add advanced features to your 3D scenes, improve the way users interact with them, and make them look stunning. Learn Learn the basics of 3D applications: vertices, faces, meshes, cameras, and renderers Learn how to set up a Three.js web app: the scene, camera, and renderer Master the scene hierarchy and child-parent relationships, and how they affect the final location and orientation of objects Explore simple mesh shapes (such as boxes, spheres, cylinders, planes, and cones) using the Three.js library Learn how to source, create, and load complex assets, including textures Discover how to use the brilliant animation system that is part of the THREE.js library Add a post-processor to a rendered image, to make it look like an old film or a dot screenprint + Table of Contents 1 The Course Overview 2 Introducing the THREE.js website 3 D Basics 4 Your first THREE.js web page` 5 The THREE.js Editor 6 Debugging Your Pages 7 Let’s Keep It Simple – Starting with a Box 8 Materials One – Basic and Wireframe 9 Spheres and Cylinders 10 Materials Two – Lambert and Phong 11 Cones and Tori 12 Scene Hierarchy 13 Perspective Camera 14 Orthographic Camera 15 Dummy Cameras and Lerping 16 Complex Camera Paths 17 Ambient and Hemisphere Lighting 18 Directional and Point Lighting 19 Spot and RectArea Lighting 20 Adding Shadows to Your Scenes 21 Physically Correct Lighting 22 Online Sources of 3D Assets 23 Using Blender with THREE.js 24 The GLTFLoader Class 25 The FBXLoader Class 26 LatheGeometry and ExtrudeGeometry 27 The Basics of the Animation System 28 Skinned Meshes 29 Switching and Blending Animations 30 Splitting an Animation Clip 31 A WASD Control System for a Player Character 32 THREE.js Post Processing 33 Introducing GLSL – ShaderMaterial 34 Introducing GLSL – Vertex Shaders 35 Introducing GLSL – Importance of Noise Function 36 Introducing GLSL – Textures

Android Camera开发入门：目录第一篇: 前景一、Android Camera开发前景； 1）camera相关应用的领域 2）相关岗位介绍； 3）市场招聘...

【视频教程】Hands-on Three.js 3D Web Visualisations-September 16, 2019.part3.rar Hands-on Three.js 3D Web Visualisations September 16, 2019 English | MP4 | AVC 1920×1080 | AAC 48KHz 2ch | 3h 46m | 968 MB eLearning | Skill level: All Levels Create stunning visualizations and 3D scenes using the Three.js library Three.js is the most popular JavaScript library for displaying 3D content on the web, giving you the power to display incredible models, games, music videos, and scientific/data visualizations in your browser and even on your smartphone! This course begins with a 3D beginner-level primer to 3D concepts and some basic examples to get you started with the most important features that Three.js has to offer. You’ll learn how to quickly create a scene, camera, and renderer and how to add meshes using the Geometry primitives included with the library. You’ll explore troubleshooting steps that will focus on some of the common pitfalls developers face. You’ll learn the very sophisticated animation system included with the library. The course concludes by introducing post-processing, essentially adding filters to your rendered scene, and GLSL, the shading language that is used by all materials included with the library. You’ll see how creating your materials is easier than you’d imagine using GLSL. By the end of this course, you’ll be able to quickly add advanced features to your 3D scenes, improve the way users interact with them, and make them look stunning. Learn Learn the basics of 3D applications: vertices, faces, meshes, cameras, and renderers Learn how to set up a Three.js web app: the scene, camera, and renderer Master the scene hierarchy and child-parent relationships, and how they affect the final location and orientation of objects Explore simple mesh shapes (such as boxes, spheres, cylinders, planes, and cones) using the Three.js library Learn how to source, create, and load complex assets, including textures Discover how to use the brilliant animation system that is part of the THREE.js library Add a post-processor to a rendered image, to make it look like an old film or a dot screenprint + Table of Contents 1 The Course Overview 2 Introducing the THREE.js website 3 D Basics 4 Your first THREE.js web page` 5 The THREE.js Editor 6 Debugging Your Pages 7 Let’s Keep It Simple – Starting with a Box 8 Materials One – Basic and Wireframe 9 Spheres and Cylinders 10 Materials Two – Lambert and Phong 11 Cones and Tori 12 Scene Hierarchy 13 Perspective Camera 14 Orthographic Camera 15 Dummy Cameras and Lerping 16 Complex Camera Paths 17 Ambient and Hemisphere Lighting 18 Directional and Point Lighting 19 Spot and RectArea Lighting 20 Adding Shadows to Your Scenes 21 Physically Correct Lighting 22 Online Sources of 3D Assets 23 Using Blender with THREE.js 24 The GLTFLoader Class 25 The FBXLoader Class 26 LatheGeometry and ExtrudeGeometry 27 The Basics of the Animation System 28 Skinned Meshes 29 Switching and Blending Animations 30 Splitting an Animation Clip 31 A WASD Control System for a Player Character 32 THREE.js Post Processing 33 Introducing GLSL – ShaderMaterial 34 Introducing GLSL – Vertex Shaders 35 Introducing GLSL – Importance of Noise Function 36 Introducing GLSL – Textures

Preface xi Acknowledgements xvii 1 Image Processing 1 1.1 Basic Definitions 2 1.2 Image Formation 3 1.3 Image Processing Operations 7 1.4 Example Application 9 1.5 Real-Time Image Processing 11 1.6 Embedded Image Processing 12 1.7 Serial Processing 12 1.8 Parallelism 14 1.9 Hardware Image Processing Systems 18 2 Field Programmable Gate Arrays 21 2.1 Programmable Logic 21 2.1.1 FPGAs vs. ASICs 24 2.2 FPGAs and Image Processing 25 2.3 Inside an FPGA 26 2.3.1 Logic 27 2.3.2 Interconnect 28 2.3.3 Input and Output 29 2.3.4 Clocking 30 2.3.5 Configuration 31 2.3.6 Power Consumption 32 2.4 FPGA Families and Features 33 2.4.1 Xilinx 33 2.4.2 Altera 38 2.4.3 Lattice Semiconductor 44 2.4.4 Achronix 46 2.4.5 SiliconBlue 47 2.4.6 Tabula 47 2.4.7 Actel 48 2.4.8 Atmel 49 2.4.9 QuickLogic 50 2.4.10 MathStar 50 2.4.11 Cypress 51 2.5 Choosing an FPGA or Development Board 51 3 Languages 53 3.1 Hardware Description Languages 56 3.2 Software-Based Languages 61 3.2.1 Structural Approaches 63 3.2.2 Augmented Languages 64 3.2.3 Native Compilation Techniques 69 3.3 Visual Languages 72 3.3.1 Behavioural 73 3.3.2 Dataflow 73 3.3.3 Hybrid 74 3.4 Summary 77 4 Design Process 79 4.1 Problem Specification 79 4.2 Algorithm Development 81 4.2.1 Algorithm Development Process 82 4.2.2 Algorithm Structure 83 4.2.3 FPGA Development Issues 86 4.3 Architecture Selection 86 4.3.1 System Level Architecture 87 4.3.2 Computational Architecture 89 4.3.3 Partitioning between Hardware and Software 93 4.4 System Implementation 96 4.4.1 Mapping to FPGA Resources 97 4.4.2 Algorithm Mapping Issues 100 4.4.3 Design Flow 101 4.5 Designing for Tuning and Debugging 102 4.5.1 Algorithm Tuning 102 4.5.2 System Debugging 104 5 Mapping Techniques 107 5.1 Timing Constraints 107 5.1.1 Low Level Pipelining 107 5.1.2 Process Synchronisation 110 5.1.3 Multiple Clock Domains 111 5.2 Memory Bandwidth Constraints 113 5.2.1 Memory Architectures 113 5.2.2 Caching 116 5.2.3 Row Buffering 117 5.2.4 Other Memory Structures 118 vi Contents 5.3 Resource Constraints 122 5.3.1 Resource Multiplexing 122 5.3.2 Resource Controllers 125 5.3.3 Reconfigurability 130 5.4 Computational Techniques 132 5.4.1 Number Systems 132 5.4.2 Lookup Tables 138 5.4.3 CORDIC 142 5.4.4 Approximations 150 5.4.5 Other Techniques 152 5.5 Summary 154 6 Point Operations 155 6.1 Point Operations on a Single Image 155 6.1.1 Contrast and Brightness Adjustment 155 6.1.2 Global Thresholding and Contouring 159 6.1.3 Lookup Table Implementation 162 6.2 Point Operations on Multiple Images 163 6.2.1 Image Averaging 164 6.2.2 Image Subtraction 166 6.2.3 Image Comparison 170 6.2.4 Intensity Scaling 171 6.2.5 Masking 173 6.3 Colour Image Processing 175 6.3.1 False Colouring 175 6.3.2 Colour Space Conversion 176 6.3.3 Colour Thresholding 192 6.3.4 Colour Correction 193 6.3.5 Colour Enhancement 197 6.4 Summary 197 7 Histogram Operations 199 7.1 Greyscale Histogram 199 7.1.1 Data Gathering 201 7.1.2 Histogram Equalisation 206 7.1.3 Automatic Exposure 210 7.1.4 Threshold Selection 211 7.1.5 Histogram Similarity 219 7.2 Multidimensional Histograms 219 7.2.1 Triangular Arrays 220 7.2.2 Multidimensional Statistics 222 7.2.3 Colour Segmentation 226 7.2.4 Colour Indexing 229 7.2.5 Texture Analysis 231 Contents vii 8 Local Filters 233 8.1 Caching 233 8.2 Linear Filters 239 8.2.1 Noise Smoothing 239 8.2.2 Edge Detection 241 8.2.3 Edge Enhancement 243 8.2.4 Linear Filter Techniques 243 8.3 Nonlinear Filters 248 8.3.1 Edge Orientation 250 8.3.2 Non-maximal Suppression 251 8.3.3 Zero-Crossing Detection 252 8.4 Rank Filters 252 8.4.1 Rank Filter Sorting Networks 255 8.4.2 Adaptive Histogram Equalisation 260 8.5 Colour Filters 261 8.6 Morphological Filters 264 8.6.1 Binary Morphology 264 8.6.2 Greyscale Morphology 269 8.6.3 Colour Morphology 270 8.7 Adaptive Thresholding 271 8.7.1 Error Diffusion 271 8.8 Summary 273 9 Geometric Transformations 275 9.1 Forward Mapping 276 9.1.1 Separable Mapping 277 9.2 Reverse Mapping 282 9.3 Interpolation 285 9.3.1 Bilinear Interpolation 286 9.3.2 Bicubic Interpolation 288 9.3.3 Splines 290 9.3.4 Interpolating Compressed Data 292 9.4 Mapping Optimisations 292 9.5 Image Registration 294 9.5.1 Feature-Based Methods 295 9.5.2 Area-Based Methods 299 9.5.3 Applications 305 10 Linear Transforms 309 10.1 Fourier Transform 310 10.1.1 Fast Fourier Transform 311 10.1.2 Filtering 318 10.1.3 Inverse Filtering 320 10.1.4 Interpolation 321 10.1.5 Registration 322 viii Contents 10.1.6 Feature Extraction 323 10.1.7 Goertzel’s Algorithm 324 10.2 Discrete Cosine Transform 325 10.3 Wavelet Transform 328 10.3.1 Filter Implementations 330 10.3.2 Applications of the Wavelet Transform 335 10.4 Image and Video Coding 336 11 Blob Detection and Labelling 343 11.1 Bounding Box 343 11.2 Run-Length Coding 346 11.3 Chain Coding 347 11.3.1 Sequential Implementation 347 11.3.2 Single Pass Algorithms 348 11.3.3 Feature Extraction 350 11.4 Connected Component Labelling 352 11.4.1 Random Access Algorithms 353 11.4.2 Multiple-Pass Algorithms 353 11.4.3 Two-Pass Algorithms 354 11.4.4 Single-Pass Algorithms 356 11.4.5 Multiple Input Labels 358 11.4.6 Further Optimisations 358 11.5 Distance Transform 359 11.5.1 Morphological Approaches 360 11.5.2 Chamfer Distance 360 11.5.3 Separable Transform 362 11.5.4 Applications 365 11.5.5 Geodesic Distance Transform 365 11.6 Watershed Transform 366 11.6.1 Flow Algorithms 366 11.6.2 Immersion Algorithms 367 11.6.3 Applications 369 11.7 Hough Transform 370 11.7.1 Line Hough Transform 371 11.7.2 Circle Hough Transform 373 11.7.3 Generalised Hough Transform 374 11.8 Summary 375 12 Interfacing 377 12.1 Camera Input 378 12.1.1 Camera Interface Standards 378 12.1.2 Deinterlacing 383 12.1.3 Global and Rolling Shutter Correction 384 12.1.4 Bayer Pattern Processing 384 Contents ix 12.2 Display Output 387 12.2.1 Display Driver 387 12.2.2 Display Content 390 12.3 Serial Communication 393 12.3.1 PS2 Interface 393 12.3.2 I2C 395 12.3.3 SPI 397 12.3.4 RS-232 397 12.3.5 USB 398 12.3.6 Ethernet 398 12.3.7 PCI Express 399 12.4 Memory 400 12.4.1 Static RAM 400 12.4.2 Dynamic RAM 401 12.4.3 Flash Memory 402 12.5 Summary 402 13 Testing, Tuning and Debugging 405 13.1 Design 405 13.1.1 Random Noise Sources 406 13.2 Implementation 409 13.2.1 Common Implementation Bugs 410 13.3 Tuning 412 13.4 Timing Closure 412 14 Example Applications 415 14.1 Coloured Region Tracking 415 14.2 Lens Distortion Correction 418 14.2.1 Characterising the Distortion 419 14.2.2 Correcting the Distortion 421 14.3 Foveal Sensor 424 14.3.1 Foveal Mapping 425 14.3.2 Using the Sensor 429 14.4 Range Imaging 429 14.4.1 Extending the Unambiguous Range 431 14.5 Real-Time Produce Grading 433 14.5.1 Software Algorithm 434 14.5.2 Hardware Implementation 436 14.6 Summary 439 References 441 Index 475 x Content

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