Digital Imaging Week 3
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Transcript of Digital Imaging Week 3
![Page 1: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/1.jpg)
Digital Imaging
• Week 3: What IS digital Imaging?
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Digital Film• The heart of a digital camera is the
sensor.
![Page 3: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/3.jpg)
Digital Film• The heart of a digital camera is the sensor. • This takes the form of a CCD - a grid of
Charged Coupled Devices.
CCD Grid
![Page 4: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/4.jpg)
Digital Film• The heart of a digital camera is the sensor. • This takes the form of a CCD - a grid of
Charged Coupled Devices.
CCD Grid
•These measure the amount of light.
![Page 5: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/5.jpg)
It’s Black & White
![Page 6: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/6.jpg)
It’s Black & White
![Page 7: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/7.jpg)
It’s Black & White
Red Separation Green Separation Blue Separation
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CMYK
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CMYK
Cyan
Magenta
Yellow
Black
![Page 11: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/11.jpg)
Understanding Digital Imaging
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• Pixels
![Page 13: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/13.jpg)
• Pixels
Each pixels holds 3 bytes of information: red, green & blue.
![Page 14: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/14.jpg)
• Pixels
Each pixels holds 3 bytes of information: red, green & blue.
![Page 15: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/15.jpg)
• Pixels
Each pixels holds 3 bytes of information: red, green & blue.
![Page 16: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/16.jpg)
• Pixels
Each pixels holds 3 bytes of information: red, green & blue.
![Page 17: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/17.jpg)
The Digital Process
![Page 18: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/18.jpg)
The Digital Process Shooting• Image is composed and shutter released
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The Digital Process Shooting• Image is composed and shutter released• Light hits the sensors and each receives a slightly different amount of light.
![Page 20: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/20.jpg)
The Digital Process Shooting• Image is composed and shutter released• Light hits the sensors and each receives a slightly different amount of light. • In response to light, each CCD produces an electronic charge - the more light,
the bigger the charge. The sensors are filtered with RGB.
![Page 21: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/21.jpg)
The Digital Process Shooting• Image is composed and shutter released• Light hits the sensors and each receives a slightly different amount of light. • In response to light, each CCD produces and electronic charge - the more light,
the bigger the charge. The sensors are filtered with RGB. • The electronic pulses are collated, converted to digital information and stored
according to their position on the CCD. This uses a special chip called an ADC chip.
![Page 22: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/22.jpg)
The Digital Process Shooting• Image is composed and shutter released• Light hits the sensors and each receives a slightly different amount of light. • In response to light, each CCD produces and electronic charge - the more light,
the bigger the charge. The sensors are filtered with RGB. • The electronic pulse are collated, converted to digital information and stored
according to their position on the CCD. This uses a special chip called an ADC chip.
• This information is stored on the cameras memory card and the camera is ready to take another shot.
![Page 23: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/23.jpg)
The Digital Process Processing & Manipulation
• The digital files are now transferred to your computer. • This can now be enhanced or manipulated using programs like Adobe
Photoshop. • The enhanced picture is then saved to the computers hard drive.
![Page 24: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/24.jpg)
The Digital Process Outputting
Web
Printer
CD/DVDs
![Page 25: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/25.jpg)
What does Mega Pixel really mean?
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1536 x 2048 = 3 million
What does Mega Pixel really mean?
2800
pix
els
1536
pix
els
2048 pixels 3008 pixels 4290 pixels
2800 x 4290 = 12 million
2000 x 3008 = 6 million
2000
pix
els
![Page 27: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/27.jpg)
Dots Per InchUsed when printing - pixels are turned into dots per inch and counted by the spread Over the paper.
![Page 28: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/28.jpg)
Dots Per InchUsed when printing - pixels are turned into dots per inch and counted by the spread Over the paper.
DPI Printer dots
![Page 29: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/29.jpg)
Digital & Optical Zoom
![Page 30: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/30.jpg)
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Interpolation
• Any means of calculating a new point between two existing data points.
![Page 34: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/34.jpg)
Interpolation
• Any means of calculating a new point between two existing data points is therefore interpolation
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Image Formats
![Page 36: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/36.jpg)
• Joint Photographic Experts Group
JPEGS
![Page 37: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/37.jpg)
• Joint Photographic Experts Group
• Can change image size & compression
JPEGS
![Page 38: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/38.jpg)
• Joint Photographic Experts Group
• Can change image size & compression• Good for web & printing
JPEGS
![Page 39: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/39.jpg)
• Joint Photographic Experts Group
• Can change image size & compression• Good for web & printing
• Fit more on a device
JPEGS
![Page 40: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/40.jpg)
• Joint Photographic Experts Group
• Can change image size & compression• Good for web & printing
• Fit more on a device
• Universal file format
JPEGS
![Page 41: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/41.jpg)
Downsides:
• Loss of quality
JPEGS
![Page 42: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/42.jpg)
Downsides:
• Loss of quality
• Less powerful processing
JPEGS
![Page 43: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/43.jpg)
Downsides:
• Loss of quality
• Less powerful processing
• Less control over image
JPEGS
![Page 44: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/44.jpg)
• Processed on computer not camera
RAW
![Page 45: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/45.jpg)
• Processed on computer not camera
• Contain every bit of data recorded
RAW
![Page 46: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/46.jpg)
• Processed on computer not camera
• Contain every bit of data recorded• Large format printing
RAW
![Page 47: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/47.jpg)
• Processed on computer not camera
• Contain every bit of data recorded• Large format printing
• Colours more accurate
RAW
![Page 48: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/48.jpg)
Downsides:
• Much bigger file sizes
RAW
![Page 49: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/49.jpg)
Downsides:
• Much bigger file sizes
• Not always compatible
RAW
![Page 50: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/50.jpg)
Downsides:
• Much bigger file sizes
• Not always compatible
• No preview
RAW
![Page 51: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/51.jpg)
Memory Cards?
•Secure Digital (SD)
•Mini SD
•Micro SD
•Compact Flash I & II (CFI & CFII)
•xD-Picture Card
•Smart Media
•Memory Stick/ Memory Stick Duo
•Internal memory
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Downloading
• USB 1.1 & 2.0
• Card reader
• Bluetooth
• Firewire
• Scanning!
![Page 53: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/53.jpg)
Memory Cards
• DON’T TAKE OUT UNTIL CAMERA IS TURNED OFF!!
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Memory Cards
• DON’T TAKE OUT UNTIL CAMERA IS TURNED OFF!!
• DON’T PULL OUT USB/CARDS FROM COMPUTER UNTIL EJECTED!!
![Page 55: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/55.jpg)
Saving• Organisation is key!
![Page 56: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/56.jpg)
Saving• Organisation is key!
Folders
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Saving• Organisation is key!
Applications
![Page 58: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/58.jpg)
Digital Manipulation
• We’ve composed our picture, set up our camera, transferred the image
on to the computer, saved and organised it.
![Page 59: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/59.jpg)
Digital Manipulation
• We’ve composed our picture, set up our camera, transferred the image
on to the computer, saved and organised it.
• Most home computers are ideal for manipulating images.
![Page 60: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/60.jpg)
Digital Manipulation
• We’ve composed our picture, set up our camera, transferred the image
on to the computer, saved and organised it.
• Most home computers are ideal for manipulating images.
• Photo stores normally won’t tweak images for you
![Page 61: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/61.jpg)
Digital Manipulation
• We’ve composed our picture, set up our camera, transferred the image
on to the computer, saved and organised it.
• Most home computers are ideal for manipulating images.
• Photo stores normally won’t tweak images for you
• Manipulation can be very subtle, not necessarily any crazy effects! A
bit brighter, a bit more contrast etc.
![Page 62: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/62.jpg)
Digital Manipulation
• We’ve composed our picture, set up our camera, transferred the image
on to the computer, saved and organised it.
• Most home computers are ideal for manipulating images.
• Photo stores normally won’t tweak images for you
• Manipulation can be very subtle, not necessarily any crazy effects! A bit
brighter, a bit more contrast etc.
• Photoshop elements - only about £60, will provide you with most of
your photographic needs. Photoshop (full version) has more features
but costs about £1000!!!!!
![Page 63: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/63.jpg)
Digital Manipulation
• We’ve composed our picture and set up our camera. Got the image on the
computer, saved and organised it.
• Most home computers are ideal for manipulating images.
• Photo stores normally won’t tweak images for you
• Manipulation can be very subtle, not necessarily any crazy effects! A bit brighter,
a bit more contrast etc.
• Photoshop elements - only about £60, will provide you with most of your
photographic needs. Photoshop (full version) has more features but costs about
£1000!!!!!
• It’s not difficult!!
![Page 64: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/64.jpg)
Some basic digital processing options
![Page 65: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/65.jpg)
• Basic Image
![Page 66: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/66.jpg)
![Page 67: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/67.jpg)
• Dodging & Burning
![Page 68: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/68.jpg)
![Page 69: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/69.jpg)
• Crop & resizing
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![Page 71: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/71.jpg)
• Changing Saturation
![Page 72: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/72.jpg)
![Page 73: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/73.jpg)
• White balance
![Page 74: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/74.jpg)
![Page 75: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/75.jpg)
• Adjusting brightness & Contrast
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![Page 77: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/77.jpg)
• Retouching or deleting details
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![Page 79: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/79.jpg)
• Converting to grayscale
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![Page 81: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/81.jpg)
• Adding filters or effects
![Page 82: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/82.jpg)
Scanning
![Page 83: Digital Imaging Week 3](https://reader033.fdocuments.us/reader033/viewer/2022052622/55956ffd1a28ab750c8b4799/html5/thumbnails/83.jpg)
Scanning
Why still scan when we have digital cameras?
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