Image Processing for 7th grade Students

PIONEER PREPARATORY SCHOOL OF SFAX Computer Science Course 7th level

PIONEER PREPARATORY SCHOOL OF SFAX:

UNIT II : IMAGE PROCESSING

AY 2011/2012

THE 7th LEVEL UNIT 2

OBJECTIVES In the end of this chapter, you will be able to: ▪

Apply some retouches to a picture

▪

Use tools of image creation

▪

Insert object in a text

▪

Import and digitize an image

USING SOFTWARE IMAGE PROCESSING

PLAN TOOLS ▪ ▪ ▪ ▪

A computer A software for image processing Scanner Images (Tweety, Mario, motor, feline, arche, fish, portrait, cloud, flag, the animals diet)

MRS. IMEN TEKAYA BOUAZIZ

1- Introduction 2- Creating picture using PhotoFiltre 2.1- Launching PhotoFiltre and presentation of the Workspace 2.2- Creating picture 3- Importing a picture 4- Image manipulation

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

AY 2011/2012

IMAGE PROCESSING I- Introduction Task 1: ▪ Can we insert an image in a text document using Microsoft Word? ………………………………………………………………………………….

▪ If it is possible, can we attribute some modification to the appearance of this picture? ……………………………………………………………………………………….

▪ Can we attribute some modifications to the content of the image using Microsoft Word? ……………………………………………………………………………………….  Conclusion : ...……………………………………………………………………………………….

Task 2: ▪ Give the name of the following devices that allow us to obtain images

Scanner

Camcorder

Webcam

▪ Why do we use these devices? ……………………………………………………………………………………….  Computer can process data using binary language. So, it can process digital image  To process image, we use the software « PhotoFiltre »

What is a digital image? ➔ A digital image is any graphic object like picture, drawing, computer graphics, charts, illustrations, etc.

It can be created using an image processing software, imported from a file, a computer network like Internet, from a storage device, etc. also; it can be acquired with a scanner or captured with a digital camera, camcorder, a webcam or a mobile phone. It can be processed using software and stored in a storage device (as binary coded information).

II- User interface a) Software launching Task 3: Launch the software “PhotoFiltre”

MRS. IMEN TEKAYA BOUAZIZ

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

AY 2011/2012

➢ Click on Start menu.

➢ Click on “All Programs”.

➢ Choose PhotoFiltre ➢ Click PhotoFiltre To launch “PhotoFiltre” you can also Use the short cut by double clicking on its icon b) The user interface

A

B C

D

Image to process

CODE NAME A Menu bar B Tool bar BasicTool C Palette D

Selection Tool

ROLE Contains the various menu of this software.

Contains the various command of this software.

Includes clone and smudge tools, magic wand and other selection options Provides the following selection tool: automatic shapes (rectangle, ellipse, triangle, and rhombus), lasso and polygon tool.

MRS. IMEN TEKAYA BOUAZIZ

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

• •

II : IMAGE PROCESSING

AY 2011/2012

Task 4: Launch « Photo Filtre » Open the image « tweety.bmp» located in «D:\photoFiltre». Use the tool “zoom in” many times.

Note: When we enlarge a picture, we note that it is composed of many squares called « Pixels ». Each Pixel has a specific colour. ➔ A digital picture is composed of many Pixels which are normally arranged in a regular twodimensional grid (width and height). Each pixel has a colour. ➔ A Pixel (picture element) is the smallest element of digital image, it’s a sort of a lightened dot stored in a binary code (sequence of 0 and 1).

Colour depth

Height

Width

➢ The resolution or the number of pixels per inch ( dot per inch), or sharpness, of a picture is determined by the number of pixels it has. For example, more pixels improve the resolution of a picture, which allows you to make a larger print without reducing visual quality. Keep in mind, however, that the more pixels a picture has, the larger its file size will be.

• The measures dots per inch (dpi) and pixels per inch (ppi) are sometimes used interchangeably.

MRS. IMEN TEKAYA BOUAZIZ

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

AY 2011/2012

âž” Color depth is the number of distinct colors that can be represented by a pixel depends on the number of bits per pixel (bpp).

The file size: more

pixels often means a larger file size, the picture's file type (JPEG or TIFF, for example) usually has more to do with file size. A picture saved using TIFF will be much larger than the same picture saved using JPEG. This is because JPEG pictures can be compressed, which makes the file smaller at the cost of slightly lower visual quality.

Examples of pictures file types: BMP, JPEG, TIFF, JPG, GIF, PNG, etc.

III- Creating a document Task 5: Follow these steps to create the picture below

MRS. IMEN TEKAYA BOUAZIZ

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

AY 2011/2012

1. Menu File / New image - 800 x 600 - Background white

2. Select 2/3 rds of the upper part 3. Menu Filter / Color / Gradient - Colour 1 : Azure Blue, Opacity 100 - Color 2 : Light Blue, Opacity 20 4. Preserve the selection and execute the PhotoMasque filter - Mask Dilution - Rotation 90 - Color white - Opacity 100 - Colors RGB - Adjust the mask 5. Select the remaining lower part 6. Menu Filter / Color / Gradient - Color 1 : Light Blue, Opacity 20 - Color 2 : Ocean Blue, Opacity 100 7. Select a horizontal band level for the transition

8. Menu Filter / Color / Gradient - Color 1 : Light green, Opacity 100 - Color 2 : Dark green, Opacity 100 9. Menu Selection / Hide selection 10. Apply twice the Filter / Artistic / Sprayed strokes

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11. Apply twice the Filter / Artistic / Rough Pastels - Smoothed paper 12. Insert text with the following parameters: - Font Comic sans MS, Size 30 pixels - Text : Your name - Color Brown - Bold - Effects : Stroke white, Blur 13. For drawing the trunks of the trees, select a few rectangular areas to the left and right of the text and fill them with dark brown color using the command Edit / Stroke and Fill.

14. Change to Selection / Set shape / Ellipse, select the areas above the trunks, move the shape into position, Stroke with Black and fill with Green 15. Insert new text: - Font Comic sans MS, Size page6

PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

- 30 pixels - Text : Your name - Color black - Bold - Blur - Opacity 40 16. Apply the command Edit / Transform / Rotation 180 17. Position the text at the border of the water and validate 18. Change to Selection / Set shape / Rectangle Select the part below representing the water (go over a little of the green) 19. Apply the Filter / Deform / Lake reflection 20. Select a rectangular area above and to the center for drawing the sun and apply Filter / PhotoMasque : - Mask: Sun - Negative mode (reversing black and white)

AY 2011/2012

- Color yellow - Opacity 100 - Colors RGB - Adjust the mask 21. For drawing the house, select a rectangular fill them using “Fill pattern”; choose “Wall03” for the wall, “wall02” for the roof and “wood01” for the door. Draw the handful.

22. Open the pictures tweety, horse, butterfly, fish 23. For each picture, choose Image menu and select the option Transparent Color, Tolerance 100 24. Copy each new picture and add it to your initial image 25. Filter Relief / Relief 26. Filter: Artistic / Colored pencil - Paper texture: grid 27. Menu Edit / Fade - Opacity 40

Notes: **To create a new document - Go to ……………, choose the option ……………………

- Or you can just click this icon **To fill a shape - Go to ……………, choose the option ……………………

- To add a stroke, select the option ………………. and choose the colour - To Fill shape with picture, select the option ………………. and choose the image **To apply filter - Go to ……………, choose the option …………………… **To create gradient of two colours - Go to ……………, choose the option …………………… **To rotate a selected area - Go to ……………, choose the option ……………………

IV- Saving a document Task 6: Save now the document that you have created ✓ Save the result of task 5 ▪ ▪ ▪

Go to ……………, choose the option ……………………

Save the document in your folder and give it the following name “nature” Choose bmp extension MRS. IMEN TEKAYA BOUAZIZ

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

AY 2011/2012

✓ Save the result of task 5 with jpg extension ▪ ▪ ▪ ▪

Go to ……………, choose the option ……………………

Save the document in your folder and give it the following name “nature2” Choose jpg extension Go to your folder and define the size of these two files nature.bmp=…………….. nature2.jpg=……………..

Notes: ** To save a document since it is the first time - Go to ……………, choose the option …………………… ** To save the modification applied to a document - Go to ……………, choose the option ……………………

- Or you can just click this icon

VI- Importing a document Task 7 : How can you obtain your portrait to manipulate it using “PhotoFiltre” ……………………………………………………………… ……………………………………………………………… ………………………………

▪ When you use a ……………………………………

- Go to ……………, choose the option ……………………

- Save the document in your folder and give it a name - Choose jpg extension ▪ When you use a …………………...

- Go to ……………, choose the option ……………………

- Save the document in your folder and give it a name - Choose jpg extension

MRS. IMEN TEKAYA BOUAZIZ

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

AY 2011/2012

Task 8: how to create an artistic blending of images?

Open these files “portrait.jpg” and “clouds.jpg” from “D:Filtre” and save the in your own folder 1. Duplicate the portrait image Menu Image >> Duplicate 2. Make a black to white gradient Menu Filter >> Color >> Gradient Direction: Left to right Color 1 = black, opacity = 100 % Color 2 = white, opacity = 100 % 3. Add some noise to the gradient Menu Filter >> Noise >> Add noise Amount = 5 Uniform = checked 4. Copy the whole gradient Menu Selection >> Select All Menu Edit >> Copy 5. Activate the first image (portrait) 6. Past the copied gradient next to the portrait Menu Edit >> Paste Special >> Assemble Assemble Clipboard data at = Right

7. Select the result and copy it Menu Selection >> Select All Menu Edit >> Copy 8. Activate the second picture 2 (Clouds).

9. Paste as image with linked mask Menu Edit >> Paste Special >> Image with linked mask

10. Press <enter> to validate the change

Task 9: Frame in Relief 1. Menu Image / Outside Frame Colour White, Width 10 pixels 2. Menu Image / Outside Frame Colour Mid Pastel Blue, Width 30 pixels 3. Menu Selection / Select All 4. Menu Selection / Contract Width 29 pixels (this corresponds to the width of the second Frame

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less 1 pixel - i.e 30 - 1 = 29) 5. Menu Selection / Invert 6. Menu Filter / Texture / Sandstone Apply this texture twice to re-inforce 7. Menu Selection / Hide Selection 8. Menu Filter / Frame / Smoothed Frame 3D

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PIONEER PREPARATORY SCHOOL OF SFAX UNIT Computer Science Course 7th level

II : IMAGE PROCESSING

AY 2011/2012

Task 10: how to create a custom postcard with a perspective effect?

1. Select the right vertical part of the image 1/4 of the image within the width and level with the height 2. Menu Filter / Color / Gradient Color 1 : White, Opacity 0% Color 2 : Black, Opacity 70% Direction Left To Right 3. Hide selection (menu Select or CRL+D) 4. Menu Filter / Deform / Trapezoid / Perspective Background : Black, Vertical axis, Left Distort : 100%, Right Distort : 80% 5. Duplicate the image (menu Image) 6. Menu Select / Select All 7. Menu Edit / Clear This action erases the contents of the image 8. Hide Selection (menu Selection or CRL+D) 9. Insert your text and personalize it !

In the example, font Comic Sans MS has been used,

Size 18, Bold Italic, Black, Smooth, Centred 10. Select the Left part of the image 1/4 of the image within the width and level with the height 11. Menu Filter / Color / Gradient Color 1 : Black, Opacity 70% Color 2 : White, Opacity 0% Direction Left To Right 12. Hide selection (menu Select or CRL+D) 13. Menu Filter / Deform / Trapezoid / Perspective Background : Black, Vertical axis, Left Distort : 80%, Right Distort : 100% 14. Copy image (menu Edit / Co) 15. Activate the left part of the image (click on or use the Window menu) 16. Menu Edit / Paste Special / Assemble Paste at right 17. Menu Image / Outside Frame Color Black, Width of 10 pixels

In this chapter, I learned ▪

Image processing software is used to create, to import an existing picture and to apply retouches to it.

▪

To apply effects on a picture, I choose the appropriate option from filter menu

▪

To transform a picture (resize, rotate, ..), I have to choose the correct option from Image menu

MRS. IMEN TEKAYA BOUAZIZ

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