GRAPHICAL MEDIA 1. ScannerScanner Graphics Sources 2.

GRAPHICALMEDIA

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• Scanner

Graphics Sources Graphics Sources

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Graphics Sources Graphics Sources• Scanner

• Digital/Video Camera or Cell Phone

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Graphics Sources Graphics Sources

CreatedCreated

“Borrowed”“Borrowed”

• Video Capture

• Screen Capture

• Scanner

• Digital/Video Camera or Cell Phone

• InternetRight-click on graphicRight-click on graphic

Print Screenvs.

Alt-Print Screen

Print Screenvs.

Alt-Print Screen

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Color ColorAdditive Color

light – RGBmonitor

Subtractive Color paint – CYMKprinter

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Color Mixer

1 black & white line drawings 2 4 posters 4 16 sketches 8 256 low-quality photographs 16 65,536 high-quality photographs 24 16,777,216 professional-quality photographs 32 4,294,967,296 I have no idea where this is used

File Size Considerations File Size Considerations

# of bits # of colors uses

Color depth (# of bits)

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Color

depth

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Graphics File Formats Graphics File Formats

· GIF & JPeG (PNG) (Internet & Camera)

· BMP & TIFf (Universal & Camera)

· Others PCX , TGA, WMF, ... Clip art

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Some projectors are only capable of displaying 256 colors.

256 – a necessary evil???

This is the maximum color depth for GIFs (one of the main graphics Web file formats).

The original color depth was 256 colors, and there is a carryover from them.

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use an adaptive palette

Some solutions:


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Some solutions:


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use dithering


Some solutions:






Image size (# of pixels)

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8004:3

600

800 x 600 = 480,000 pixels

480,000 x 1 byte = 480,000 bytes480,000 x 2 bytes = 960,000 bytes480,000 x 3 bytes = 1,440,000 bytes

ResolutionVideos

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192016:9

1200

1920 x 1200 = 2,304,000 pixels

2,304,000 x 1 byte = 2,304,000 bytes 2,304,000 x 2 bytes = 4,608,000 bytes 2,304,000 x 3 bytes = 6,912,000 bytes

ResolutionMy Computer

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1920

1200

600

800

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As reported in: http://www.w3schools.com/browsers/browsers_resolution_higher.asp

http://www.w3schools.com/browsers/browsers_resolution_higher.asp

http://www.w3schools.com/browsers/browsers_resolution_higher.asp





Image size (# of pixels)

compressed vs. uncompressedcompressed vs. uncompressed18

pixel x - andpixel y -

pixels x & y -

jpeg

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bmp

1096 x 777 x 3 = 2,495 kbytes21

gif

568 kbytes22

jpeg

193 kbytes23

bmp gif jpg

Image Comparisons

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GRAPHICSSOFTWARE

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Paint

Draw

vs.

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Graphics SoftwareGraphics SoftwareIn my work with graphics software, I have performed these three basic functions:

1. Converting from one file format to another

2. Editing the contrast, brightness, and color or hue

3. Changing the content of the graphic

(Note: These are not always found in a single

software package.

(Note: These are not always found in a single

software package. 27

Paint (Windows) - editor and converter for BMP, JPG, GIF,PCD, PCX, TIFF, DIB, and TGA files.

Lview Pro (www.lview.com) - editor and converter for BMP, JPG, GIF, PPM, PCX, TIFF, DIB, and TGA files.

Paint Shop Pro (www.jasc.com) - editor and converter for BMP, JPG, GIF, PPM, PCX, TIFF, DIB, and TGA files.

Free Graphics SoftwareFree Graphics Software

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http://www.lview.com/

http://www.jasc.com/

$$$ Graphics Software$$$ Graphics Software

Adobe Photoshop (CS5 - $699/199)

Adobe Illustrator (CS5 - $599)

Corel Draw (Suite X5 - $399)

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For this course, we will learn how to integrate existing images into VB programs.

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PictureBox

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PictureBox

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PictureBox

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By default, in Normal mode, the Image is positioned in the upper-left corner of the PictureBox, and any part of the image that is too big for the PictureBox is clipped.

Using the StretchImage value causes the image to stretch or shrink to fit the PictureBox, which may distort the image.

Using the Zoom value causes the image to be stretched or shrunk to fit the PictureBox; however, the aspect ratio in the original is maintained.

Using the AutoSize value causes the control to resize to always fit the image.

Using the CenterImage value causes the image to be centered in the client area.

By default, in Normal mode, the Image is positioned in the upper-left corner of the PictureBox, and any part of the image that is too big for the PictureBox is clipped.

Using the StretchImage value causes the image to stretch or shrink to fit the PictureBox, which may distort the image.

Using the Zoom value causes the image to be stretched or shrunk to fit the PictureBox; however, the aspect ratio in the original is maintained.

Using the AutoSize value causes the control to resize to always fit the image.

Using the CenterImage value causes the image to be centered in the client area.

In VB, let’s look at the effect on two images using each of the SizeMode options.

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35This was shot with a 15 Megapixel camera and is NOT full size!

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This is the image in PhotoShop displayed at 25% of its size.

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This is the image in PhotoShop displayed at 100% of its size.

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Normal

Center

Normal100%

Normal100%

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CenterImage100%

CenterImage100%

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StretchImage<100%

StretchImage<100%

Zoom<100%

Zoom<100%

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AutoSize100%

AutoSize100%

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Normal100%

Original100%

StretchImage >100%

Zoom>100%

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Center100%

Original100%

AutoSize100%

Read the Description

of Assigment-8

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