Guidelines for digital images: "SXGA+" (1400 x 1050)
Similar guidelines apply to various other events using the "SXGA+" (1400 x 1050 pixels) format. Such events include:
- other inter-club projected digital image competitions using similar projectors, for example with Wilmslow Guild
- internal "informal" sessions such as "bring a travel panel", "10 images in 10 minutes", and image evaluation in Digital Workshops
This page identifies the core guidelines for projected digital images that apply to all of the above. This page will be referenced from various other pages as required.
Image display size, file type, colour space:
Each image must be in JPEG format. (That is not to say its file extension must be "JPEG").
It must be exactly 1400 pixels wide and 1050 pixels high, and if the picture itself is smaller than 1400x1050 pixels, the remaining area must be a chosen background, for example black.
It should be converted (if necessary) to sRGB colour space, and ideally the colour profile should be embedded.
(Parameters such as "DPI" or "PPI" will be ignored).
Verifying conformance to the guidelines:
Experience shows that up to half of all digital images submitted to our events, such as internal and Exhibition competitions, are incorrect in some way!
It is recommended that members open all of their images in Photoshop or similar for a last check before submission. This only takes seconds, but can save a lot of time and anguish.
The screen-shot here shows what the "Info" panel in Photoshop CS3 looks like with a conformant image, if it is configured suitably. To use it for this purpose, Photoshop itself needs to be using "pixels" as its "Ruler Unit", using Edit > Preferences > Units & Rulers. Then the "Info" panel needs to display the illustrated information, using Palette Options via the drop-down menu shown in red to set all the "Document ..." information.
The essential details are highlighted just for this page:
- This shows the normal "Doc" size. (This is what an uncompressed JPEG image of this pixel size would be. It is not the actual file size).
- The "sRGB" line shows how a JPEG with an embedded sRGB profile looks to Photoshop.
- "1400 pixels" must come first, then "1050 pixels". (The PPI is ignored).
Information about projector calibration:
We have calibrated our Shuttle PC + Canon Projector system using our Spyder 2 Pro.
(Guidelines revised 24 October 2008)