Monday, December 2, 2013
Monday, November 18, 2013
1. BookSmart accepts JPG or PNG files. PNGs should be 8-bit and non-interleaced. No TIFF, EPS, PDF, PICT, BMP, and GIF files.
2. Images should be in RGB or Grayscale (sRGB recommended; no CMYK).
3. The resolution of images loaded into BookSmart should be 150DPI minimum; 300DPI maximum. Out-of-camera JPGs are fine and don't need to be resized unless you're placing many high-resolution JPGs on a single page (for instance, into a yearbook-type layout).
Scanned images and/or PNGs should be smaller than 15MB. The width of vertically oriented scans or PNGs should be less than 4000 pixels; the height of horizontal scans or PNGs should also be less than 4000 pixels. Adding images that exceed those recommended limits may slow BookSmart's performance, introduce compression artifacts into your images, stall uploading, and/or prevent your book from being printed.
If any image you've loaded into BookSmart doesn't meet these guidelines, please open the source file(s) in a photo-editing program, make the necessary changes, save the image(s) with a different file name (to preserve your full-size source file) and load the optimized image(s) into your BookSmart project.
Short Answer: You will have to use JPEGs for your photos, but keep them at a high resolution.
Monday, November 11, 2013
HDR: High-dynamic-range imaging is a method of capturing a greater dynamic range between the lightest and darkest areas of an image. HDR images can represent the range of intensity levels found in real scenes, from direct sunlight to faint starlight, and is often captured by way of a plurality of differently exposed pictures of the same subject matter.
For Wednesday, collect a series of images to use for the HDR demonstration. You need not take a long time with content, it is more desirable you just get comfortable with the process. You will then upload a final image on Flickr by the end of the day Monday the 18th.
1. Look for a subject that has a high contrast range. Ideal scenarios are landscapes (ground/sky), windows, urban areas, backlight subjects, basically anything with a wide range of darks and light areas.
* Put the camera on a tripod or make it stable (you must do this)
* take enough photos to cover the dynamic range of the scene. Minimum of 3. Five to seven is better.
* use your exposure compensation on each photo.
* Exposure should vary about 1 stop in between photos.I suggest one shot at +2, +1, normal, -1, -2
* Don't use flash
* Try to avoid things moving in the scene (cars, people, chinchillas)
2. Open Photoshop - Go to File - Automate - HDR Pro (will do this on Wednesday)
Now take a minute to select various Presets at the top right of the screen.
Check Remove Ghosts.
Mode: 16 Bit Local Adaptation (Scroll through the others to see the differences. Local Adaptation gives you the most control.
Equalize Histogram compresses the dynamic range while preserving contrast (automatic) Exposure/Gamma lets you adjust brightness and contrast using sliders.
Highlight Compression compresses the dynamic range of the highlights (automatic)
Radius: Controls the size of the edge glow
Strength: Controls the contrast of edge glow.
Edge Smoothness: Preserve smoothing while boosting details
Tone and Detail:
Gamma: Difference between highlights and shadows. Bigger # = more contrast.
Exposure: Brightness of image. Bigger # = brighter.
Detail: Brings back details by selective contrast.
The adjustments help you dial in shadow/highlight detail.
Posted by Prof. Ireland at 7:27 AM