Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Fangjun ShuJuly 20, 2007

How Can You Get Higher How Can You Get Higher Quality Photos?Quality Photos?

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

OutlineOutline

1. Familiar with our equipments2. Preparations3. Taking photos

1. Illumination2. Camera setting (Shutter, aperture, iso…)3. Focus4. Click!

4. Use of accessories5. Post processing6. My suggestions

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Familiar with our Familiar with our equipmentsequipments

What do we have?– Cameras:

• Nikon D70 6 M pixel digital camera (most often used)• PCO SensiCam QE DS camera• Panasonic VDR D100 DVD video camera• Security camera• Phantom high speed camera

– Accessories• Lens (F-mount, C-mount and microscope lens with tube)• Borescope (30º with illumination ports)• Photo booth (with one tripod and two spotlights)• 67 mm filter set for the Nikon D70 digital camera (UV,

fluorescent and polarizer filter)• Three F-mount extension tubes for taking magnified

pictures (for the Nikon D70)

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

PreparationPreparation

• Equipment selection and preparation– Camera, tripod, photo booth, filter …

• Background– If possible, please use the photo booth– Remove all unrelated objects from the view– Isolate the unrelated background using a light cold

colored curtain or board, I personally prefer blue

• Arrange the scene– Don’t “hide” your subject in distractions – Don’t let your subject occupy the whole picture– Don’t leave big unoccupied space in the picture – Put your subject a little bit off the center (1/3)– Keep the picture “balanced”

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

IlluminationIllumination

• Brightness– Measure– Compensation

• Direction– 3D

• Color temperature– White balance

Camera

Object

Front

45º front

Side

45º backBack

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Illumination directionIllumination direction

Ambient Flash 45º front spot light

45º back spot light Back spot light

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Camera settingCamera setting

Camera settings Camera mode

Auto Micro “A” – aperture priority (F/#) “S” – shutter priority (exposure time) “M” – Manual (F/# and exposure time can

change independently)

ISO

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

F/# examplesF/# examples

F/14

F/4.2

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Shutter time examplesShutter time examples

1/15 sec

1/80 sec

2

2 – ½ sec.2” – 2 sec.

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

ISO examplesISO examples

ISO 200 ISO 1600

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

FocusFocus

Though manual focus is available for the camera, I suggest auto focus. It is usually more accurate. When using extension tube(s) for magnified picture, you’d better focus manually first then use the auto focus.

There should be details in the auto focus window to ensure valid auto focus. The auto focus more sensitive to vertical lines in many digital cameras.

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Click!Click!

• If a tripod is not used, hold the camera correctly. Hold your breath while clicking.

• When shooting static objects, take more photos than required. Review your picture on the camera and adjust camera settings accordingly (ISO, shutter, F/#, etc.)

• I suggest use the continues shooting mode when taking pictures of moving objects.

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Use of accessories Use of accessories (Extension tubes)(Extension tubes)

Extension tubes

original

1 tube

3 tubes

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Use of accessories (circular Use of accessories (circular polarizer filter)polarizer filter)

Original (with out CPL filter) with CPL filter

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Post processingPost processing• When we take pictures, we should do our best to ensure good

quality. But …• If you can increase photo quality via post process, why not?• With Photoshop, you can do almost everything you can think

of. But don’t cheat

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Post processingPost processing

• What can we do?– Crop photo– Adjust brightness, contrast and

gamma– Enhance color– Remove apparent noise speckles– Adjust illumination– Things you can imaging

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Post processing example Post processing example 11

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Post processing example Post processing example 22

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

Post processing example Post processing example 33

• Brightness/contrast adjustment

• Background blur

Laboratory for Innovation and Optimization of Medical DevicesLaboratory for Innovation and Optimization of Medical Devices

My suggestionsMy suggestions

• Use a tripod if possible• Select lower ISO if possible• If you want accurate color, adjust

white balance before picture taking• Use manual mode (“M”) instead of

“Auto” mode• Use auto focus• Process your photo before distribute• Practice makes perfection