Unit 35

Undertake Technical Adjustments of Images

• In the visual arts, colour theory is a body of practical guidance to colour mixing and the visual impacts of specific color combination. There are also definitions (or categories) of colors based on the colour wheel: primary colour, secondary colour and tertiary colour. 

• In Technical Compatibility is when you can have certain image formats used on certain HTML's for example if i had a website which i have and i would use .png because this format is better because it can display a background for the image.

• When designing an image you need to take in consideration the file size pixel e.g.  dimensions,resolution. the file size is determind by the image size the pixel dimension and the resolution pixel dimension is important when creating your image. Pixel dimension is the amout of pixels on the screen for example I have an image that is 5 px by 5 px i increase that to 10 px hight and width you are increasing the pixels on the screen this can effect the image because you download a image that is 250 px hight and width you increase that to 1000 px that going to lower the quality it going to make your page blurry this is because the image has been extended and not very attractive you can use dimension locks on photoshop where you can lock the image and then make it larger without effecting the quality this means that the resolution stay the same because this means there will not be any blurring in the pictures quality. resolution the the quality of the image it is what I said before a picture that is 250 px has a better resolution than if you increase it to 1000px.

• Resolution is the number of pixels in a linear inch—pixels per inch (or PPI), but it is most commonly referred to as dots per inch (DPI). The more pixels, or “dots,” per inch, the higher your image resolution will be.

• With color images, each pixel can be one of 16 million different colors. For black and white images, there are 256 gradations of gray pixels ranging from black to white: 0 (black) through 255 (white). More pixels means higher resolution, which creates better image quality because you end up with more realistic representations of color, better gradations of both individual colors and gray tones, and crisper images in general.