WHAT IS SCANNER AND DIFFERENT TYPES OF SCANNER?

Scanner is device use to scan document and images and convert it into digital format.

Types of scanners:
1.Flatbed scanner
2.Sheet-fed scanner
3.Handheld scanner
4.Drum scanner

Flatbed scanners are desktop scanners.
Parts of flatbed scanner:
1.Charge coupled device (CCD) array
2.Mirrors
3.Scan head
4.Lens
5.Filters
6.Interface ports
7.Control circuitry
The core component of scanner is CCD array.CCD is technology for image capture in scanners.
CCD is collection of tiny light sensitive diodes,which converts light into electric charge.
The image of document that we scan reaches the CCD array through a series of mirrors,filters and lenses.

Sheet-fed scanners are similar to flatbed scanners except that the document is moved and the scan head is immobile.

Handheld scanners use same basic technology as a flatbed scanner,but depends on the user to move them.
This type of scanner does not provide good image quality.

Drum scanners are very powerful.They use technology called a photomultiplier tube(PMT).
In PMT,the document to be scanned is mounted on a glass cylinder.
At the center of the cylinder is a sensor that splits light bounced from the document into three beams.
Each beam is sent through a colour filter into PMT where the light is changed into an electric signal.

FOR MORE INFORMATION WATCH THE BELOW VIDEO

Comments

Journey into creating a privacy-first period tracking solution that puts users in control.

Introduction As a developer passionate about women's health and digital privacy, I noticed a concerning trend: most period tracking apps require accounts, store sensitive data on servers, or bombard users with ads. That's why I built Period Tracker - a free, private, and accessible solution that keeps your data where it belongs: with you. The Core Features Period Tracker offers everything you need for comprehensive menstrual tracking: Personalized cycle predictions based on your unique patterns Ovulation and fertility window calculations Local browser storage for complete privacy PDF export and print-ready calendars Simple, intuitive interface with no login required Why It Matters In a post-Roe world, period tracking privacy isn't just a feature - it's a fundamental right. By storing data locally in your browser, Period Tracker ensures your sensitive health information remains under your control. No accounts, no servers, no data sharing - just accurate t...

From AI Chaos to Clean Content: The Story Behind AIMarkdownPro

The idea for AIMarkdownPro came to me during a late-night coding session in early 2024. I was working on documentation for a project, copying responses from ChatGPT and Claude, only to spend another hour cleaning up the formatting. The AI-generated markdown looked promising in the chat interface, but when I converted it to HTML for my website, it was a mess—broken lists, inconsistent spacing, and code blocks that refused to render properly. That frustration sparked a six-month journey that culminated in launching AIMarkdownPro on the Google Play Store ( https://play.google.com/store/apps/details?id=com.aimarkdownpro.app ), and I couldn't be more excited to share what we've built. Why I Built AIMarkdownPro As someone who works extensively with AI tools, I noticed a gap in the workflow that no existing markdown editor addressed. Traditional converters worked fine for human-written markdown, but AI-generated content had unique patterns—nested formatting, inconsistent syntax,...

Launching convertcsv2json: The Privacy-First CSV to JSON Converter Developers Actually Want

After months of development and countless iterations, I'm excited to announce the launch of convertcsv2json - a professional-grade CSV to JSON converter that prioritizes privacy, performance, and user experience. Why I Built This As a developer, I was frustrated with existing CSV conversion tools. Most required uploading sensitive data to unknown servers, had limited customization options, or simply didn't work reliably with complex datasets. I wanted something better - a tool that could handle real-world data challenges while keeping everything secure. What Makes convertcsv2json Different Privacy-First Architecture : Everything happens in your browser. Your data never touches our servers, eliminating security concerns that plague other online converters. Smart Processing : Our auto-delimiter detection intelligently identifies comma, semicolon, tab, pipe, and space delimiters. No more guessing or manual configuration for standard files. Professional Features : Multi...

GET INFO

Search This Blog