Digital Photography, Pixels, Compression.
The term pixels in digital photography simply comes from the words ‘picture elements’. Simply put, a pixel is the smallest aspect of a digital image, and each pixel has a certain brightness level and a certain color which is linked to the information that is collected by the camera’s image sensor. A colored photo that we see is a result of millions of pixels gathered together in an organized manner similar to a stitched tapestry which produces a picture with larger basic elements.
It follows that if a picture has a greater number of pixels, then you will have a better quality picture. It is particularly important to have a larger number of pixels if you are wanting to produce an enlargement. As you can imagine, the larger the picture, the further apart the pixels or dots will be. Generally speaking, when we speak of a higher resolution, we are saying that there are more pixels contained in the picture.
On the other hand, the term compression in digital photography refers to the fact that in most cases (except for RAW images) the digital camera compresses files by default so that it is possible to store more images in the camera’s memory. For instance, in the case of a JPEG image, the camera takes blocks of picture image, removing unnecessary information and retaining what is essential so that the picture can be reconstructed. So how much compression you select, has a big bearing on your picture quality. For instance, a low compression setting on your camera will give you better results than if you chose a high compression setting on your digital camera.
As always, I suggest that you experiment with these settings to educate yourself in regard to obtaining the best quality digital photos that you can from your particular camera.








