Digital Imaging System

  A digital imaging system is a set of devices for acquiring, storing, manipulating, and transmitting digital images.

Components-

• Image Sensors
• Image Storage
• Image Processor
• Image Display Devices
• Networking Components
• Image Processing Software

1. Human being perceive objects because of light. Light source are of two types- primary and secondary.
2. The sun and Lamps are example of primary light sources.

Nature of Light 

wavelength- wavelength is the distance between two successive wave crests or wave troughs in the direction of travel.

Amplitude- Amplitude is the maximum distance the oscillation travels, away from its horizontal axis.

Frequency- The frequency of vibration is the number of waves crossing at a point.

mode Imaging

Reflective Mode Imaging

 Reflective mode imaging represents the simplest form of imaging and uses a sensor to acquire the digital image. All video cameras, digital cameras, and scanners use some types of sensors for capturing the image.

Emissive Type Imaging 

Emissive type imaging is the second type, where the images are acquired from self-luminous objects without the help of a radiation source. In emissive type imaging, the objects are self-luminous. The radiation emitted by the object is directly captured by the senor to form an image. Thermal Imaging is an example of emissive type imaging.

Transmissive Imaging

Transmissive imaging is the third type, where the radiation source illuminates the object. The absorption of radiation by the objects depends upon the nature of the material. Some of the radiation passes through the objects. The attenuated radiation is sensed into an image.

Image Processing Environment

 Radiation Source 

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                                            ↓                                   ↓                                              ↓

                                        object                   self-luminous object          Transparent Object

                                                 \                                  |                                        /

                                                     \                              |                                    /

                                                        \                          ↓                               /    

                                                           ========================

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sensor 

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 analog signal 

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Digitizer

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Digital Computer

Nature of Image Processing

 images are everywhere! Sources of images are paintings, photographs in magazines, Journals, image galleries, digital Libraries, newspapers, advertisement, boards, television and Internet.

Images are limitations of Images.

In image processing, the term  'image' is used to denote the image data that is sampled, quantized, and readily available in a form suitable for further processing by digital computers.

cryptocurrency, but do you know exactly what it is and how it works?

 Cryptocurrency

Cryptocurrency is digital money that can be used to buy goods and services, using strong encryption techniques to secure online transactions. Banks, governments and even companies like Microsoft and AT&T are very aware of its importance and are jumping on the cryptocurrency bandwagon!

1 - Cryptocurrency owners keep their money in encrypted, virtual ‘wallets.’ When a transaction takes place between the owners of two digital wallets, the details are recorded in a decentralized, electronic ledger or blockchain system. This means it is carried out with a degree of anonymity and is self-managed, with no interference from third parties such as central banks or government entities.

2- Approximately every ten minutes, special computers collect data about the latest cryptocurrency transactions, turning them into mathematical puzzles to maintain confidentiality.

3- These transactions are then verified through a technical and highly complex process known as ‘mining.’ This step typically involves an army of ‘miners’ working on high-end PCs to solve mathematical puzzles and authenticate transactions.

Once verified, the ledger is updated and electronically copied and disseminated worldwide to anyone belonging to the blockchain network, effectively completing a transaction.

Cryptojacking

Cryptojacking is an emerging threat that hides on a user’s computer, mobile phone, tablet, laptop or server, using that machine’s resources to 'mine’ cryptocurrencies without the user's consent or knowledge.

Many victims of cryptojacking didn’t even know they’d been hacked until it was too late!

Image processing

 What is image quantization? why it is important?

Image quantization is process of converting the continuous range of pixel value into a limited set of discrete value. This step follows sampling and reduces the precision of sampled values to manageable level for digital representation.

DSA day by day preparation in two months

welcome! 

we are going to start a full dsa tour where we learn from the base to intermediate i know my some of time my spellings are not correct but i know the knowledge can make the differences between them. so lets going into deep

dsa mean Data Structure And Algorithm

 

data structure - data and the structure means ?

algorithm ?

write the correct answer in the comment section i want to know the numbers of students who want to learn the DSA.

after this post i start the journey to complete the DSA course with related languages like Java, Python, C++ and other languages on your demands. 

now its your turn write comments and i make sure everyone is ready to involved in this journey