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- W265111505 abstract "When using CMOS technology for image sensors, there is a possibility that any given pixel is defective and will thus produce a value that does not correlate to the amount of light it was subject to. As such, the processing unit will calculate a value that diers from the value produced if the transistor was working correctly. Having a pixel with a defective value can manifest itself as a light spot or a dark spot depending on whether the transistor for that pixel is on or o. In some areas where the value of the defective pixel does not dier greatly from its neighbors, the image will not appear as degraded in the eyes of the viewer as if the defective value was in great contrast to its surroundings.The ability to compensate for the defective pixels with an algorithm will result in a more robust device that is not required to function perfectly in order to produce an image. It also translates into prot as a company can sell image sensors that would otherwise have been discarded by testing procedures. This report is organized with chapter 1 providing the introduction to the assignment in terms of the nature of defective pixels and also creating a context with explanation as to why it is an important aspect of manufacturing image sensors .Chapter 2 describes the development board that is utilized and how an embedded system can utilize a vhdl peripheral. It also shows what components will go into making an embedded system with the required functionality. The theory behind components and techniques used in this project is in chapter 3. The vhdl les to be added to a peripheral so that they can be accessed by the cpu, and the architectures of the vhdl les and microblaze are placed in chapter 4. Chapter 5 contains the simulations of the input images with dierent noise levels and threshold levels in addition to tests designed to determine the embedded systems functional ability.The vhdl les and the microblaze systems are synthesized with the resulting numbers revealed in chapter 6. The tools used in this project are listed in chapter 7 with their version number. Chapter 8 contains discussions regarding the results and techniques in this project. The concluding remarks and the further work for the project are in chapter 9 and 10, respectively. A list of terms will explain abbreviations used in this report. i" @default.
- W265111505 created "2016-06-24" @default.
- W265111505 creator A5050047366 @default.
- W265111505 date "2010-01-01" @default.
- W265111505 modified "2023-09-26" @default.
- W265111505 title "Defective Pixel Correction" @default.
- W265111505 hasPublicationYear "2010" @default.
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