Image Manipulator
The KS3 National Curriculum for Computing requires that you understand how data of various types (including text, sounds and pictures) can be represented and manipulated digitally , but it's also useful practical knowledge. If you didn't know how an image was stored, how could you make it, for example, lighter or darker? It would seem like magic.
On this page you can upload an image - it will read the values of red, green and blue values for the pixels from the file and display them below. You can then manipulate the image by adding to, or multiplying the values, either for a single colour or for all of them. What do you think will happen? Also, is the colour information all you need? NB. If you upload a large image there might be a delay before it is displayed.
You have not uploaded a valid file.
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Data Representation: Bitmap Images
Using a spreadsheet as a grid of 'pixels', this computing activity teachers how 1's and 0's can store image data. The classroom exercises use images with increasing pixel resolution, looking at how this affects the clarity of the image. Moving from black-and-white images, the students then use grids of colour values to represent colour pictures. The resource includes a starter activity, teacher-led learning activity and homework knowledge-consolidation task.
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Data Representation
Lesson 01 - binary numbers & conversions.
- Presentation
- Challenge Sheet
- The Binary number system explained
- The Hexadecimal number system
- Hexadecimal practice questions
- Practice quiz!
- James May on Binary
WORKSHEET ALTERNATIVE IF YOUR PERMISSIONS STOP YOU ACCESSING
- Main Task - Binary Conversion.docx
Lesson 02 - Binary Addition
- Binary addition
task Sheet Binary Addition if you cannot open the one above
- Main Task - Binary Addition.docx
Lesson 03 - Representing Images
- Images, pixels and RGB
- Colour depth
- Calculating image file sizes
Worksheet week 3
- Representing Images.docx
Lesson 04 - Representing Sound
- Sound Waves
- Analogue and digital sound
- Sample resolution
- Sampling rate
- Further reading
- You Tube on Frequencies
Sound Task if you cannot access above
- Representing Sound Worksheet.pptx
Lesson 05 - Representing Text
- Character sets - intro
- Extended ASCII
- ASCII vs Unicode
Project - Encryption
- Project PowerPoint
- EXTENSION 1 - Caesar cipher programming questions
- EXTENSION 2 - Programming the caesar cipher
- Caesar Cipher example
Teach Computer Science
KS3 Computer Science Data Representation Resources
Ks3 computer science data representation topics.
This module provides a strong base for your students’ computer science knowledge and allows you to teach the basic concepts of computer science. Including:
Module 32: Binary system Module 33: Hexadecimal system Module 34: Character sets Module 35: Images Module 36: Steganography Module 37: Sound Module 38: Compression Module 39: Encryption algorithms
What’s included?
Each module contains:
- An editable PowerPoint lesson presentation
- Editable revision handouts
- A glossary which covers the key terminologies of the module
- Topic mindmaps for visualising the key concepts
- Printable flashcards to help students engage active recall and confidence-based repetition
- A quiz with accompanying answer key to test knowledge and understanding of the module
As a premium member, you get access to the entire library of KS3 Computer science resources. Choose your modules to below to start your downloads.
Binary system
Download ks3 module 32: binary system.
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Hexadecimal system
Download ks3 module 33: hexadecimal system, character sets, download ks3 module 34: character sets, download ks3 module 35: images.
Steganography
Download KS3 Module 36: Steganography
Download ks3 module 37: sound, compression, download ks3 module 38: compression, encryption algorithms, download ks3 module 39: encryption algorithms.
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Lesson 10 Representing bitmap images
Curriculum > KS4 > Unit > Lesson
First, learners will investigate what a pixel is by looking at a pixelated image. They will then discover how colour depth and resolution are used to determine the number of available colours and the image size. Finally, learners will find out about metadata and the types of metadata used with a bitmap image.
Learning objectives
- Describe what a pixel is and how pixels relate to bitmap images
- Describe colour depth and resolution
- Define ‘metadata’
- Give examples of metadata applied to a bitmap image
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Computer Science > Computer Vision and Pattern Recognition
Title: extreme compression of adaptive neural images.
Abstract: Implicit Neural Representations (INRs) and Neural Fields are a novel paradigm for signal representation, from images and audio to 3D scenes and videos. The fundamental idea is to represent a signal as a continuous and differentiable neural network. This idea offers unprecedented benefits such as continuous resolution and memory efficiency, enabling new compression techniques. However, representing data as neural networks poses new challenges. For instance, given a 2D image as a neural network, how can we further compress such a neural image?. In this work, we present a novel analysis on compressing neural fields, with the focus on images. We also introduce Adaptive Neural Images (ANI), an efficient neural representation that enables adaptation to different inference or transmission requirements. Our proposed method allows to reduce the bits-per-pixel (bpp) of the neural image by 4x, without losing sensitive details or harming fidelity. We achieve this thanks to our successful implementation of 4-bit neural representations. Our work offers a new framework for developing compressed neural fields.
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KS3 Computer Science: Data Representation - Year 7
Subject: Computing
Age range: 11-14
Resource type: Unit of work
Last updated
27 November 2021
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"There are 10 kinds of people in the world; those who understand binary numbers… and those who don’t!"
Alongside understanding the joke above(!), KS3 Computer Science: Data Representation - Year 7 will teach your students the following:
- Explain why a computer uses binary.
- To be able to identify the number of bits in different units of data e.g. Bit, Nibble, Byte, Kilobyte, Megabyte, Gigabyte, etc.
- To explain the difference between ‘base 2’ and ‘base 10’ numbering systems.
- To be able to convert binary into denary and vice versa.
- Explain how characters are stored in the ASCII character set.
Your students will learn this information through a variety of clearly presented instructions as well as a range of tasks and activities designed to consolidate learning.
This unit of work also includes a final assessment.
Full teacher solutions also included!
Before completing this unit of work, it is recommended that your students complete Computer systems for year 7 so they have an understanding of the different hardware components of a computer.
Tes paid licence How can I reuse this?
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KS3 Computer Science SUPER BUNDLE!
This huge bundle includes all my key stage 3 computer science units of work as well as knowledge organisers and revision sheets to help prepare your students for their final assessments (all included). Full solutions are also included. This bundle contains: * Computer Systems - Year 7 * Computer Systems - Year 8 * KS3 Networks * Computational Thinking for KS3 * Algorithm Design - Year 7 * Algorithm Design - Year 8 * Data Representation - Year 7 * Data Representation - Year 8 Also includes knowledge organisers and revision sheets and starter activities! Purchase all these resources within this bundle and you will save over 25% individual resource price!
KS3 Computer Science - Data Representation
This bundle includes both my Year 7 & Year 8 data representation units of work as well as knowledge organisers and revision sheets to help support students within their final assessments. Purchase both units together and save 25% off individual cost!
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Data representation. Computers use binary to process data. There are simple techniques to convert between binary and denary and to add two binary numbers together. Learn how text, images and sound ...
KS3; Representing text, images and sound Representing images. ... Part of Computer Science Data representation. Save to My Bitesize Remove from My Bitesize. In this guide. Revise. Test. Pages.
Discover how binary codes text, images and sound with Bitesize KS3 Computer Science. Learn about ASCII, Unicode and other encoding systems.
KS3 Computer Science Images teaching and homeschooling resources. Ideal for ages 11-14 in UK and abroad. Get a Free Sample! ... An image in data representation is a visual representation of information that is stored in digital form. In a computer, an image is represented by a set of binary numbers that define the color, size, and position of ...
Data Representation: Bitmap Images. A lesson plan and series of activities to help students understand that bitmapped images are built up purely of pixels. This includes a spreadsheet designed to represent monochrome and then simple colour images. The effect of increasing the range of colours available and its' effect on file size is discussed ...
Computer science data representation KS3. This resource contains 6 lessons on data representation, looking at images properties, Text (ASCII & Unicode), Sound and compression. Each lesson has been created with student engagement and learning at the forefront. Resouces contains main student booklet which can be printed out or given digitally ...
Free online course Approximately 8 hours of self-study. Learn how data is represented through media; audio, visual and text. This online course explores how computers do interesting things with data. You'll discover how to represent and manipulate text, images and sound and compression and other algorithms.
KS3 Data Representation . This is a series of four, 30 to 60 minute, sessions that will go through the basics of binary numbers, bitmap images and compression. Session contain: • Step by step instructions. • A presentation or document to follow.
Age range: 11-14. Resource type: Unit of work. File previews. pptx, 29.71 MB. pptx, 29.76 MB. Within KS3 Computer Science: Data Representation - Year 8, your students will recall and build upon understanding developed within Data Representation for Year 7 and learn the following: To recall binary and denary conversion techniques from year 7.
The KS3 National Curriculum for Computing requires that you understand how data of various types (including text, sounds and pictures) can be represented and manipulated digitally, but it's also useful practical knowledge. If you didn't know how an image was stored, how could you make it, for example, lighter or darker? It would seem like magic.
GCSE; AQA; Fundamentals of data representation - AQA Representing images. All data is represented as binary digits, whether it is numbers, text, images or sound. Calculations are also made in binary.
Show downloads. Information on the permitted use of this resource is covered by the Category Three Content section in STEM Learning's Terms and conditions. This secondary-school computing resource takes a practical approach to how images are represented with digital data. Colour and monochrome bitmap images are simulated using spreadsheet tables.
This is a full scheme of work for KS3 computing/computer science. The theme of the unit is data representation, covering binary, text/images and boolean logic. The unit consists of 8 lessons: Each lesson includes a PowerPoint and corresponding worksheet. I use these worksheets on OneNote but they can just as easily be edited in Word or printed ...
In general, the higher the colour depth the more detail in the image (higher quality) In a black & white image the colour depth would be 1, meaning 1 bit is enough to create a unique binary code for each colour in the image (1=white, 0=black) In an image with a colour depth of 2, you would have 00, 01, 10 & 11 available binary codes, so 4 colours.
This unit allows learners to gain the understanding and skills required for the data representation sections of the GCSE computer science exam. First, learners look at binary and hexadecimal numbering systems, how they work, and how to convert between bases. Then, learners explore different coding systems and find out how text, images, and sound are represented in computers. All lessons ...
Data Representation - Encryption - Caesar cipher vs Vernam cipher. Networking - Asymmetric encryption. Cryptography: Crash Course Computer Science #33. The Caesar cipher | Journey into cryptography | Computer Science | Khan Academy. Hacked off in 2014: the cyber-battle for cash and privacy. adding binary. Binary bases and convert 21 to binary.
KS3 Computer Science Data Representation Topics. This module provides a strong base for your students' computer science knowledge and allows you to teach the basic concepts of computer science. Including: Module 32: Binary system Module 33: Hexadecimal system Module 34: Character sets Module 35: Images Module 36: Steganography Module 37: Sound
So to work out the angle, multiply the fraction by \ (360\): \ (\frac {7} {30} \times 360 = 84^\circ\) Repeat this process to find the angles for the other segments. Check that the angles are ...
Lesson 10 Representing bitmap images. First, learners will investigate what a pixel is by looking at a pixelated image. They will then discover how colour depth and resolution are used to determine the number of available colours and the image size. Finally, learners will find out about metadata and the types of metadata used with a bitmap image.
In 1974, Birman posed the question of under what conditions a matrix with Laurent polynomial entries is in the image of the Burau representation. In 1984, Squier observed that the matrices in the image are contained in a unitary group. In 2021, Salter formulated a specific question: whether the central quotient of the Burau image group is the central quotient of a certain subgroup of the ...
KS3 Computer Science - Data Representation. This bundle includes both my Year 7 & Year 8 data representation units of work as well as knowledge organisers and revision sheets to help support students within their final assessments. Purchase both units together and save 25% off individual cost! £5.06. was £5.95.
Implicit Neural Representations (INRs) and Neural Fields are a novel paradigm for signal representation, from images and audio to 3D scenes and videos. The fundamental idea is to represent a signal as a continuous and differentiable neural network. This idea offers unprecedented benefits such as continuous resolution and memory efficiency, enabling new compression techniques. However ...
The emergence of deep learning techniques has advanced the image segmentation task, especially for medical images. Many neural network models have been introduced in the last decade bringing the automated segmentation accuracy close to manual segmentation. However, cutting-edge models like Transformer-based architectures rely on large scale annotated training data, and are generally designed ...
The size of an image file can be estimated using: the image height in pixels. the image width in pixels. the colour depth per pixel. Example - an image of height 200, width 400, colour depth 16 ...
Learn about representing data with BBC Bitesize Key Stage 3 Maths. Box Plots. Venn Diagrams. KS3 Maths Representing and interpreting data learning resources for adults, children, parents and teachers.
Alongside understanding the joke above (!), KS3 Computer Science: Data Representation - Year 7 will teach your students the following: Explain why a computer uses binary. To explain the difference between 'base 2' and 'base 10' numbering systems. To be able to convert binary into denary and vice versa. Explain how characters are stored ...