Blog Optimization
Hello. Today we’ll talk about the optimization of images for Web. First, let’s ask ourselves: what goals we want to achieve optimizing images?
The minimum weight of the pictures should contribute to quickly loading pages. Optimal weight 20-30 kb
Our images should become an additional source of traffic from Yandex and Google search engines
Images must be unique.
The third point needs to explain a little. The main trend of the latest changes in the search algorithms of Yandex and Google was a decrease in the search index by removing duplicated content from it. Therefore, if we take the image for our article in the search engine, then we must unique this image in order to get to a good place in the issuance of pictures.
Search systems have their own algorithms for determining images duplicates. It looks like this: for starters, the image is given to a certain size, level of brightness, gamut, saturation, and t. D. Then they make an cast from the images – the image parameters are measured at certain points (I suspect that there are a lot of points so much) and it falls into the base. Then, according to this cast, a further comparison occurs. The compared image also leads to a certain size, level of brightness, gamut, saturation, otherwise, they measure and compare with what is in the base.
What does it mean to us? Based on this, we can immediately discard not working ways to unique images.
Creation of screenshots.
Changing size, pruning, scaling.
Change in brightness, gamma, color and other things.
Change of image format.
Filters.
Experienically, it was possible to establish some relatively working methods located in the order of decrease in efficiency. A greater effect gives combining several ways.
Mirroring the image vertically or horizontal.
Image rotation at an angle of 5-30 °
Strong compression – more than 20%
Distortion of the image.
In order to check our assumptions, we need to use the following tools. Firstly, this is already familiar to us a program with which we made screenshots: Fs Capture. Secondly, this is a wonderful free raster graphic editor of drawings and photos for Windows – Paint. Net. And thirdly, we need a free online service for finding images, you can search for duplicates on it.