SlideShare a Scribd company logo
Imaxe Dixital
Un sistema informático codifica, xestiona e descodifica os
datos en sistema binario: activado ou desactivado.
Imaxe vectorial
Imaxe bitmap
Imaxe: vectorial - bitmap
Resolución dunha imaxe
• Densidade ou número de píxeles que ten a imaxe por unidade de medida
lineal: PPP= píxeles por pulgada PPC= píxeles por centímetro
1pulgada= 2,54 centímetros
Tamaño dunha imaxe
• En píxeles: Número de
píxeles expresado en anchura
por altura. Número total en
megapíxeles.
• EN bytes: Tamaño
informático. Cantidade de
información binaria (memoria)
• De saida: Tamaño
superficial.
Monitor
• Píxeles de monitor: Zonas cadradas ou en panal. A distancia entre
centros: pitch.
• Resolución de monitor: Número total de píxeles, expresado en
ancho por alto. (1.024 x 768)
Resolución de cámara dixital
• Tamaño en
píxeles da imaxe
capturada,
expresada unhas
veces en alto por
ancho, e case
sempre en
número total de
píxeles,
redondeado en 2
elevado a 20
Redimensionado e remostraxe
Redimensionado:non
cambia o número de
píxeles, nin o tamaño
informático.
Remostraxe: aumentar
(interpolación) ou reducir
( descarte) o número de
píxeles
Interpolación
Interpolación
Modos de cor
• A profundidade de cor: número de bits utilizados para describir o valor tonal
de cada píxel.
• Mapa de bits ou bitmap: utilizan só un bit para describir cada píxel ( branco –
negro)
• Cor indexada, escala de grises: con 8 bits poden definirse 256 cores
diferentes, ou 256 niveis de luminosidade entre o negro e o branco.
Sistemas de cor
• O modo RGB: asigna a cada píxel 3 bytes de información. A profudidade
de cor é 256 elevado 3 igual a 16,77 millons de tonalidades posibles.
• O modo CMYK: a cada pixel corresponden 4 bytes de informacion. Na
practica, se utilizan 100 valores por primario. Nas imprentas se traballa
sobre porcentaxes de tinta. Total de 100 millons de cores.
• O modo HSB: en pintura se
definen tres caracteristicas
fisicas da cor: Matiz, Pureza e
Luminosidade.
• O sistema LAB: abarca todo o
espectro visible, outros modos
teñen as limitacions tecnoloxicas
dos medios empregados:
sensores, luces, tintas, etc.
A càmara dixital
• En lugar de empregar unha pèlicula con emulsiòn fotosensible, incorpora un
dispositivo CCD ou CMOS matricial con fotorreceptores sensibles às tres
lonxitudes de onda dos primarios RGB. As respostas elèctricas son
trasformadas polo conversor A/D en datos binarios.
• A capacidade de captura expresase en megapixeles.

More Related Content

Featured

2024 State of Marketing Report – by Hubspot
2024 State of Marketing Report – by Hubspot2024 State of Marketing Report – by Hubspot
2024 State of Marketing Report – by Hubspot
Marius Sescu
 
Everything You Need To Know About ChatGPT
Everything You Need To Know About ChatGPTEverything You Need To Know About ChatGPT
Everything You Need To Know About ChatGPT
Expeed Software
 
Product Design Trends in 2024 | Teenage Engineerings
Product Design Trends in 2024 | Teenage EngineeringsProduct Design Trends in 2024 | Teenage Engineerings
Product Design Trends in 2024 | Teenage Engineerings
Pixeldarts
 
How Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental HealthHow Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental Health
ThinkNow
 
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
AI Trends in Creative Operations 2024 by Artwork Flow.pdfAI Trends in Creative Operations 2024 by Artwork Flow.pdf
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
marketingartwork
 
Skeleton Culture Code
Skeleton Culture CodeSkeleton Culture Code
Skeleton Culture Code
Skeleton Technologies
 
PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024
Neil Kimberley
 
Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)
contently
 
How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024
Albert Qian
 
Social Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie InsightsSocial Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie Insights
Kurio // The Social Media Age(ncy)
 
Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024
Search Engine Journal
 
5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary
SpeakerHub
 
ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd
Clark Boyd
 
Getting into the tech field. what next
Getting into the tech field. what next Getting into the tech field. what next
Getting into the tech field. what next
Tessa Mero
 
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search IntentGoogle's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Lily Ray
 
How to have difficult conversations
How to have difficult conversations How to have difficult conversations
How to have difficult conversations
Rajiv Jayarajah, MAppComm, ACC
 
Introduction to Data Science
Introduction to Data ScienceIntroduction to Data Science
Introduction to Data Science
Christy Abraham Joy
 
Time Management & Productivity - Best Practices
Time Management & Productivity -  Best PracticesTime Management & Productivity -  Best Practices
Time Management & Productivity - Best Practices
Vit Horky
 
The six step guide to practical project management
The six step guide to practical project managementThe six step guide to practical project management
The six step guide to practical project management
MindGenius
 
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
RachelPearson36
 

Featured (20)

2024 State of Marketing Report – by Hubspot
2024 State of Marketing Report – by Hubspot2024 State of Marketing Report – by Hubspot
2024 State of Marketing Report – by Hubspot
 
Everything You Need To Know About ChatGPT
Everything You Need To Know About ChatGPTEverything You Need To Know About ChatGPT
Everything You Need To Know About ChatGPT
 
Product Design Trends in 2024 | Teenage Engineerings
Product Design Trends in 2024 | Teenage EngineeringsProduct Design Trends in 2024 | Teenage Engineerings
Product Design Trends in 2024 | Teenage Engineerings
 
How Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental HealthHow Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental Health
 
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
AI Trends in Creative Operations 2024 by Artwork Flow.pdfAI Trends in Creative Operations 2024 by Artwork Flow.pdf
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
 
Skeleton Culture Code
Skeleton Culture CodeSkeleton Culture Code
Skeleton Culture Code
 
PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024
 
Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)
 
How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024
 
Social Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie InsightsSocial Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie Insights
 
Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024
 
5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary
 
ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd
 
Getting into the tech field. what next
Getting into the tech field. what next Getting into the tech field. what next
Getting into the tech field. what next
 
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search IntentGoogle's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search Intent
 
How to have difficult conversations
How to have difficult conversations How to have difficult conversations
How to have difficult conversations
 
Introduction to Data Science
Introduction to Data ScienceIntroduction to Data Science
Introduction to Data Science
 
Time Management & Productivity - Best Practices
Time Management & Productivity -  Best PracticesTime Management & Productivity -  Best Practices
Time Management & Productivity - Best Practices
 
The six step guide to practical project management
The six step guide to practical project managementThe six step guide to practical project management
The six step guide to practical project management
 
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
 

Imagen digital

  • 1. Imaxe Dixital Un sistema informático codifica, xestiona e descodifica os datos en sistema binario: activado ou desactivado.
  • 5. Resolución dunha imaxe • Densidade ou número de píxeles que ten a imaxe por unidade de medida lineal: PPP= píxeles por pulgada PPC= píxeles por centímetro 1pulgada= 2,54 centímetros
  • 6. Tamaño dunha imaxe • En píxeles: Número de píxeles expresado en anchura por altura. Número total en megapíxeles. • EN bytes: Tamaño informático. Cantidade de información binaria (memoria) • De saida: Tamaño superficial.
  • 7. Monitor • Píxeles de monitor: Zonas cadradas ou en panal. A distancia entre centros: pitch. • Resolución de monitor: Número total de píxeles, expresado en ancho por alto. (1.024 x 768)
  • 8. Resolución de cámara dixital • Tamaño en píxeles da imaxe capturada, expresada unhas veces en alto por ancho, e case sempre en número total de píxeles, redondeado en 2 elevado a 20
  • 9. Redimensionado e remostraxe Redimensionado:non cambia o número de píxeles, nin o tamaño informático. Remostraxe: aumentar (interpolación) ou reducir ( descarte) o número de píxeles
  • 12. Modos de cor • A profundidade de cor: número de bits utilizados para describir o valor tonal de cada píxel. • Mapa de bits ou bitmap: utilizan só un bit para describir cada píxel ( branco – negro) • Cor indexada, escala de grises: con 8 bits poden definirse 256 cores diferentes, ou 256 niveis de luminosidade entre o negro e o branco.
  • 13. Sistemas de cor • O modo RGB: asigna a cada píxel 3 bytes de información. A profudidade de cor é 256 elevado 3 igual a 16,77 millons de tonalidades posibles. • O modo CMYK: a cada pixel corresponden 4 bytes de informacion. Na practica, se utilizan 100 valores por primario. Nas imprentas se traballa sobre porcentaxes de tinta. Total de 100 millons de cores.
  • 14.
  • 15. • O modo HSB: en pintura se definen tres caracteristicas fisicas da cor: Matiz, Pureza e Luminosidade. • O sistema LAB: abarca todo o espectro visible, outros modos teñen as limitacions tecnoloxicas dos medios empregados: sensores, luces, tintas, etc.
  • 16. A càmara dixital • En lugar de empregar unha pèlicula con emulsiòn fotosensible, incorpora un dispositivo CCD ou CMOS matricial con fotorreceptores sensibles às tres lonxitudes de onda dos primarios RGB. As respostas elèctricas son trasformadas polo conversor A/D en datos binarios. • A capacidade de captura expresase en megapixeles.