With the use of computers we can format our digital graphics to suit the needs of the creator and the viewer of the image.
For example if you are planning to upload one of your photos up to your blog or website you have to take into consideration the size of the file size. If the file size is 4mb in size it may look great in detail but it may take a long time for a person with a weak Internet connection to load the image and therefore may navigate away from the web page before it has even loaded. Because of this it is great to know the effects and size of a range of graphics so we can format our images to the best suited file format for its purpose.
The resolution of an image is how many pixels are in and can be contained in an image therefore how much depth and quality the image can hold. The rule is the more pixels in an image the higher the quality can be. A file format that has a good resolution is the TIFF file as it supports a large range of colours therefore allowing as much of the quality of the photo out of it. Though the higher the pixel count the higher the file size as more data is needed to show off the quality of the photo.
Even the screen you are using to read this has a set screen resolution. The rule for screens tend to be is the bigger your screen, the larger your screen resolution.
If you have a low resolution set the quality of your photo will be greatly lowered so if the photo is being used for professional use set it to the highest you can to fulfill the full quality of the image.
If used for unprofessional or use on the Internet like uploading images to your blog lower the resolution to a standard that is just good enough so the image will load up faster and will save up space on your hard drive.
Colour depth
This is how much colours an image can hold. The more colours the image can show, the higher the quality. Bitmap file sizes will differ on your chosen colour depth. There are different options such as 16 bit, 24 bit, 32 bit etc. The more colours a picture can show the more realistic and higher quality the photo will be. This requires more data to be stored in the photo. So a 24 bit photo will hold more than the same image being 16 bit.
So you will need to decide if you’re uploading a photo to website whether or not the quality of the photo is needed. If it’s not then you may be better of using a lower bit photo as the user would rather have the picture load quickly rather than waiting.
If you are using the photo for quality reasons such as work you will be better off using a higher bit photo like 256 rather than lower bits. This will make the photo a much higher quality.
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