CAMERA WORKING AND DATA FLOW THE LENS AND TYPE OF LENSES EXPOSURE TRIANGLE APERTURE SHUTTER ISO CAMERA IQ TESTING PROCESS CAMERA ADB COMMANDS AND INPUT KEY EVENTS

1. INTRODUCTION TO CAMERA
LENS AND IMAGE QUALITY
TESTING

2. CONTENTS
 CAMERA WORKING AND DATA FLOW
 THE LENS AND TYPE OF LENSES
 EXPOSURE TRIANGLE
 APERTURE
 SHUTTER
 ISO
 CAMERA IQ TESTING PROCESS
 CAMERA ADB COMMANDS AND INPUT KEY EVENTS

3. CAMERA WORKING
 Camera is one of the key subsystems
in smartphones
 Basic things in camera are Lens,
Aperture, Shutter and Sensor
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4. CAMERA DATA FLOW
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5. THE LENS
 Main Purpose of Lens is Focus the image and
Magnification.
 Lenses are classified by their focal length
 Types of Camera Lens
a) Normal lenses
b) Macro lenses
c) Long or Telephoto lenses
d) Wide angle lenses
e) Zoom lenses
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6. NORMAL LENSES
 Normal lenses have an angle of view
which is roughly the same as the angle
that the human eye can comfortably
 Normal lenses is one with a mid-rang
focal length, typically around 50mm
 Normal lenses have a fixed focal length
and wide aperture
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7. MACRO LENSES
 A macro lens is one designed
especially for close-up
photography.
 They produce some really eye
 A normal-focal-length macro lens
(50 mm on a 35 mm)
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8. LONG OR TELEPHOTO LENSES
 Telephoto lenses compress space
 They make things look like they are closer
together.
 They make backgrounds bigger.
 They are also known as portrait lenses
 Long lenses have a focal length above 80mm
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9. WIDE ANGLE LENSES
 Wide angle lenses spread out space.
 They make things look further apart.
 They make backgrounds look smaller.
 Long lenses have a focal length that is 10mm to
35mm
 They have short lenses and good for landscape
shot
 Extreme wide angle lenses are known as fisheye
lens because these can capture around 180
degrees
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10. ZOOM LENSES
 Zoom lenses have variable focal
lengths
 You can set it to different focal
lengths
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11. EXPOSURE
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 Exposure is one of the most critical
elements of photography.
 There are three adjustable elements
that control the exposure:
• APERTURE.
• SHUTTER SPEED.
• ISO.

12. APERTURES
 It is like Pupil in our eyes
 They control the intensity of light
 it controls how much light is being
passed onto the camera's sensor.
 Aperture number are called F-stop and
means Fraction.
 Bigger Aperture =More light and Smaller
Aperture =Less light
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13. APERTURES
 Aperture control the DOF (Depth of Filed)
 DOF :How much of your photo is in focus
 Wide angle lenses- Long DOF
 Tele lenses – Short DOF
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14. SHUTTERS
 Shutters function like an eye lid. They control how
long light enters a camera.
 Shutter speeds are fractions of a second. Fast shutter
speeds such as 250, 500, or 1000 are good for action
shots.
 Slow shutter speeds such as 1,2, or 4 are good for low
light pictures and pictures where water looks soft and
like cotton.
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15. ISO
 ISO simply stands for the International
Organization of Standardization
 ISO measures the sensitivity of the
image sensor.
 A higher ISO typically translates to a
noisy or “grainy” image.
 A lower ISO won’t just make less
noise, and Capture better colour and
dynamic range
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16. CAMERA IMAGE QUALITY
TESTING

18. CAMERA ADB COMMANDS
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 adb shell monkey -p
your.package.name -v 500
 adb shell
screencap/sdcard/screen.png
 adb shell screenrecord
/sdcard/demo.mp4

19. INPUT KEYEVENTS
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20. Thank you 