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John Munno's presentation

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Image capture powerpoint Image capture powerpoint Presentation Transcript

  • Image Capture Presented by John Munno to the Oxford Greens Camera Club, March 2, 2011
    • Our digital photos travel on a journey from camera to computer software editing programs to files on your computer hard drive, external back up drives or on line back up systems.
    • This class image capture will make sure your images will be in the optimum format for each leg of this journey.
    • Knowing what selections and choices to make about saving your images along each step of the journey will ensure that your images will be suitable for the needs they are meant for.
  • In-camera image capture
    • Picture Control or Style are presets for tone, hue, saturation etc., suitable for certain photo types such as landscapes or portraits etc.
    • Image quality and size sets the type of format your image will be saved in such as Raw vs Jpeg and the size of the image saved such as small medium and large in pixel dimensions/mega pixels.
  • Picture Control and Style
    • Picture Control on Nikon or Picture Style on Canon settings are in-camera preset adjustments for tone, hue, contrast saturation etc. These may only work for jpg. files. It may depend on your camera.
    • Landscape Neutral
    • Portrait Vivid
    • Standard Monochrome
  • Image Quality
    • Image Quality sets the output size of the photos, as well as the file type the image will be saved as.
    • Jpeg basic, Jpeg Normal, Jpeg fine
    • NEF (Raw) on canon (.cr2) (Raw)
    • Options for Raw and Jpeg combined
  • Image Size
    • Size of the image can be adjusted from small to medium to large.
    • This size is measured in pixel dimensions and megapixel
    • Caution: If you set the size to small, your 12 megapixel camera now becomes as low as a 3 megapixel camera.
  • Image use.
    • Knowing what you are going to do with your images when they leave the camera will determine what sizes and format you will use.
    • If you are using the images for web and emails you can use the smaller jpeg settings so you don’t have to convert in the computer later on as we did last class
    • For printing and the best quality choose the largest image size highest in megapixels
    • Raw format is preferred by many as it holds more data in the file that is not lost by jpeg conversion
    • Smaller format file types allow for more images to be stored on the memory card. Raw images are large and you can only hold about 400 raw images on a 4GB card where as you can hold 800 jpegs in fine mode etc.
  • 1) Jpegs don’t support layers 2) Jpegs are called “lossy” image. Information is lost when it is converted to jpeg in the camera and quality is lost when opening and closing files. 3) Jpegs only support 8 bit images!! (today’s camera sensors can capture 12 and 14 bits of color data and most raw editing software supports 16 bit raw images.) 1) Jpegs compress the images and the file is smaller then most. Thus you can fit more photos in your cameras memory card and Smaller in size uses less space on computer hard drive 2) File is recognized by most printing services like Costco or Ritz etc. 3) Images can be emailed and uploaded on websites easier then other formats. 4) Need no in computer converting or other programs to print etc. Jpeg (industry standard) (images are processed in the camera) Cons Pros File type
  • 1) Large size 2) Can’t display on web 1) Lossless format 2) No loss of data, won’t degrade with opening and saving images 3) Free exchange between applications and computer platforms. 4) High quality images often used for print applications such as making brochures etc. 5) Supports layers 6) Suitable for many types of compression methods. Tiff Cons Pros File type
  • 1) Large size 2) Only supported by certain computer programs. 3) Can’t email upload to web etc. 1) Lossless format 2) Supports layers PSD Cons Pros File type
    • Strips out meta data information from the original raw such as active d lighting information etc.
    • Another added step to convert from raw to dng.
    • Only works with certain programs. (Won’t work with Nikon Capture NX
    • Takes more processing time and power than working with Raw images.
    1) Like raw but smaller 2) (information is not stored in separate XMP file but stored in the original file) DNG (relatively new format) adobe proprietary raw Cons Pros File type
  • 1) Have to process them in the computer. 2) Size is large and take up more space on memory cards and computer hard drive 3) Have to be converted to another program such as jpegs for printing, uploading to web and emailing. 1) Can recover information in highlights and shadows in post processing 2) Can adjust white balance in post processing 3) Greater color depth containing 12,14 bit depth in camera and later converted to 16 bits in raw editing computer software. Raw Based on camera manufactures standards Cons Pros File type
  • Get a back up or two or three
    • You spend all this time and effort taking images. Make sure you have a good back up system.
    • SD cards fail. Computer hard drives fail. External back up drives fail too.
    • All the above have happened to me.
    • It is recommended to have 3 sources of back-ups with one off-location.