There are simple flipping, rotating and distortion correction functions in the transform menu. Here we need introduce ‘Image size’ and ‘Content aware resize’ more.
Image size
The default ‘Advanced’ is a combination of our optimized algorithms for enlarging and scale down.
The enlarging algorithm will enhance the edges to make them looks as sharp as the original. This is good when enlarging a graphic style image or an image with clear edge. Uncheck ‘Keep edge vector’ to disable this feature, and you will get a smooth outputting.
There is another algorithm called 'Fixed x2’ which enlarge photo to 2 times fix. This algorithm brings great result when the input image has a perfect quality (low noise and no jpeg artifacts). Much better than using the default method.
The above picture shows the difference between algorithms for enlarging. You can see the comparisons to the bicubic method, which is a standard method, the advanced algorithm output more smooth and sharpen edge. The ‘Fixed x2’ algorithm has the clearest result .
When decrease the image size, another algorithm are using in the ‘Advanced’ mode. This algorithm support ‘Details’ and ‘Sharpness’ as its parameters. Which can brings more clearly small image like below.
Content aware resize
When printing a photo, the paper may have a different ratio as the photo. For example, you have a 4:3 photo need printing on 6 inch paper which is 3:2 in ratio. The common way is cropping photo to the ratio or leave blanks in border. The cropping will cut things in border while leaving blank looks imperfect. Now, the ‘Content aware resize’ function will help you solve this problem.
The basic idea of this function is, if pixels need removing from photo to change the photo, the most ‘unimportant’ pixels will be removed first to remains the important contents. The program will judge which part of the photo is more important and which is less important. When changing the ratio, removes the less important part.
Some time the program will make mistake in judging the contents. When this happened, distortion will appears. To prevent it, you need select the main objects called ‘protected area’ before enter this function. The pixels in ‘protected area’ will try keeping unchanged until it have to.
