Digitial Photography using Picasa slides

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Class handouts for a class on digital photography based on using Picasa.

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  • Digital Photography using Picasa September 9 to Oct 2, 2013 Mondays and Wednesdays Larry Weber lbweber@gmail.com (650) 323-3106 323- Tutor:
  • Schedule Lesson 1 Sep 9 Lesson 5 digital images & installing Picasa Lesson 2 selecting photos, collages, tags, & maps Sep 11 know your camera & file formats Lesson 3 Lesson 6 Sep 25 batch edit, adding text, saving & emailing photos Sep 16 workflow, importing photos, & basic editing Lesson 4 Sep 23 Sep 18 advanced editing, camera 2 & composition Lesson 7 Sep 30 sharing your pictures web albums & Flickr Lesson 8 Oct 2 printing your photos, slide shows & cloning with Faststone Digital Photography using Picasa 2
  • Lesson 1 Administrivia Some of this class is based on David Pogues Digital Photography: The Missing Manual In this lesson we will learn What is a digital photo How to get Picasa What is a jpeg image Digital Photography using Picasa 3
  • What is a digital image Millions of small blocks of color: pixel Arranged in rows and columns: aspect ratio Think of it as a modern day mosaic Digital Photography using Picasa 4
  • Pixels and Resolution Block of color and brightness Measured in Megapixels (millions) Height x width = number of megapixels (almost) You can select resolution on camera Pixelation occurs when the image is enlarged so that the individual pixels can be seen Digital Photography using Picasa 5
  • Pixels an example Digital Photography using Picasa 6
  • Installing Picasa Official Picasa web site: picasa.google.com Digital Photography using Picasa 7
  • Digital Photography using Picasa 8
  • Or the Easy Way with Ninite.com Digital Photography using Picasa 9
  • Run the installer and Allow changes Digital Photography using Picasa 10
  • Where are your photos on the PC? Windows convention Every user has a Pictures folder Use folders and file names to identify and group photos Picasa uses where your photos are stored When you open Picasa, it looks at the folders on your computer and displays the photos it finds. Your original photos are always preserved Picasa keeps the changes separately from the photo Digital Photography using Picasa 11
  • First time you run Picasa Digital Photography using Picasa 12
  • Picasa has a photo viewer (optional) Digital Photography using Picasa 13
  • Basic Picasa Window - library Digital Photography using Picasa 14
  • Folder Manager Tell Picasa where are your photos Digital Photography using Picasa 15
  • Adjusting the size of the thumbnails Click on the zoom control and slide it left/right What happened? This only changes the size of the thumbnails on the screen, it does not change the size of the photo Digital Photography using Picasa 16
  • Lesson 2 Review and questions from the last class In this lesson we will learn Get acquainted with your camera Scene modes Depth of Field File Formats - JPGs Digital Photography using Picasa 17
  • Digital Camera Lens Aperture Shutter speed Focus Flash Image sensor User interface (UI) LCD Memory card (CF, SD, Battery Same between digital and film ) Unique to digital Identify these features on your camera Digital Photography using Picasa 18
  • Scene Modes Camera have settings to guide the exposure Auto camera to make all the choices Sports assumes there is fast motion in the scene Portrait optimizes for skin tones Landscape large aperture and no flash Night slow shutter Macro optimizes for close up Fireworks no flash and slow shutter (use a tripod) Panorama hold button down and pan, takes multiple photos which are stitched together. Digital Photography using Picasa 19
  • Shutter speed/Aperture relationship 1600 Needs more light Shutter Speed: Less light 800 400 200 Needs less light 100 60 30 Number is fractions of a second, so 30 means 1/30 of a second f16 f11 f8 f5.6 Aperture: More light Digital Photography using Picasa f4 Each f-stop larger allows half the amount of light, so f8 has twice the light as f11 20
  • Depth of Field Digital Photography using Picasa 21
  • Shutter speed and aperture affects blur and depth of field from www.photonhead.com Digital Photography using Picasa 22
  • Is more megapixels better? Sorta but not the whole story Also important in a camera is Accuracy of colors Sensitivity to light Lens distortion (lack of) Focus accuracy UI ease of Use What resolution of your camera? Digital Photography using Picasa 23
  • Higher resolution = bigger photo 1 mega pixel 2 mega pixel 4 mega pixel 6 mega pixel 8 mega pixel Digital Photography using Picasa 10 mega pixel 24
  • Detail look from a 1 mega pixel photo 10 mega pixel photo Digital Photography using Picasa 25
  • File Formats (produced by camera) JPEG most common, standard, compressed and lossy TIFF standard, large files not lossy RAW large, most editing flexibility but manufacturer specific Lossy means that some photo quality is lost in a tradetrade-off for a smaller (compressed) file What file formats does your camera support? Digital Photography using Picasa 26
  • Comparison of resolutions and file formats Digital Photography using Picasa 27
  • Example of lossy compression Low compression Medium compression Digital Photography using Picasa High compression 28
  • Assignment Take some pictures and bring them to the next class Indoors and Outdoors Distance and close Sun light, incandescent light and florescent light Digital Photography using Picasa 29
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  • Lesson 3 Review and questions from last class In this lesson we will learn Workflow of digital photography Importing photos and watched folders Editing in Picasa Auto correction Undo and Redo Rotate and Straightening Digital Photography using Picasa 33
  • Digital Photography Workflow 1. Acquiring the image 3. Camera Scanner Download Sharing 2. Editing with Picasa Organizing your photos Tags, Collections, Facial recognition and places Improving the image Taking the photo Automatic settings or manual settings Composition Special techniques 4. Displaying and sharing On-screen Web sharing Print Email Media show Digital Photography using Picasa 34
  • Steps of importing your photos Importing photos always involves 1. 2. 3. Copying the photos to a folder in your computer Naming the folder with a meaningful name Picasa set to watch this folder These steps can be done either by Using Picasa import, or Manually using Windows operations [Optional] Rename each photo replace the arbitrary camera name with a meaningful one Digital Photography using Picasa 35
  • Connect memory card to computer Use a memory card reader or USB cable connected to your camera (camera must be ON to act like a card reader) Digital Photography using Picasa 36
  • AutoPlay in Windows Starts Picasa with import tool Same as starting Picasa yourself Digital Photography using Picasa 37
  • Import dialog in Picasa Digital Photography using Picasa 38
  • Importing from your Camera Import options Start import manually Digital Photography using Picasa 39
  • What Happened (previous slide) Picasa created folders based on date taken Placed those folders in My Pictures Copied the photos into the created folders Left the photos on the memory card Digital Photograph