How do I resize my images to 1600 pixels by 1200 pixels for Digital Projected Image shows?
What is a RAW file?
When a digital camera takes a photograph the sensor records a huge amount of data, which it holds as lots of ones and zeros and then converts it into an image file that computers can read. The default file type is .jpg (pronounced jay-peg). Many cameras now have the option to retain the original captured data, known as RAW because it hasn't been processed. The great advantage of this is that, using RAW converter software on your computer, you can significantly adjust the camera settings that you used, changing exposure, colour saturation, contrast, etc, without damaging the original image. If you tried this with a jpg file you would see serious degradation of the image. By making several conversions from the same RAW file, to get the settings right for sky, mid ground and foreground, you can then seamlessly blend them in your photo editing software. If you just stick to the jpg image you may find that parts of your image are too dark or too bright, depending on how your camera software assessed the conditions.
What is HDR?
A digital camera sensor is capable of recording a defined range of luminosity or brightness. This range is far less than perceived by the human eye. In conditions where there is a significant difference in brightness and contrast a single image, even if taken in RAW, will not record the full range. By taking a series of identical photographs at different shutter speeds the resultant images can then be combined to produce a single image which is properly exposed in all areas. This is very difficult and sometimes impossible to do manually, but recent technology has allowed the development of software which can merge images automatically. HDR is short for High Dynamic Range.
Alas there is no YouTube video as yet which demonstrates this. However, this very informative video was made to demonstrate an earlier resizing standard of 1400 by 1050 pixels. Exactly the same principles apply to 1600 by 1200 so wherever 1400 is mentioned just replace it with 1600 and 1050 by 1200. Watch the video carefully. It’s important to understand that the resized image must always be in landscape format, not portrait, and the hight must be 1200 pixels, not 1600. If you are still not sure then ask a club member as getting it wrong will exclude your entries from many competitions.
Can I be stopped from taking photographs?
Yes if you are on privately owned property and the owner does not permit photography. This could include parks and shopping centres. However, there are no restrictions on photography of anything or any person in a public place with the single exception of a police officer on active anti-terrorism duty. It is suggested that this very useful guidance from the Association of Chief Police Officers is kept in your camera bag at all times as the message has not yet filtered down to many police officers and security guards.