Working with large images

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         Large images are those over 10,000 pixels, although it’s relative and depends on the characteristics of your computer.  

          Some filters (For instance Motion Blur) require more resources. If your computer is slow, and you have a long history tree and a large image in the beginning of the tree, the changes in each parameter might take seconds, which is really annoying.

Here are some tips on how to make the work more efficient and convenient.  

 

        General tip: under no circumstances are you supposed to increase the image resolution. There’s no point in that since the image will stay the same visually.

 

 Let’s say you need to edit a 600 dpi image and print out a 10х15 cm photo for the family album.

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      You can decrease the resolution down to 150 dpi or even 72 dpi (filter “Resize Image”), and then edit. The difference between the 150 dpi and the 600 dpi images is noticeable only for a professional upon thorough examination, having both images laid out before them.

We do not recommend dpi lower than 72, because the image will be blurred. 

 

         A good quality group photo. You need to majorly retouch the face of one of the group members. The image will be displayed on a big screen or via a projector.

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It’s strongly advised against decreasing the resolution. It will be really noticeable on a big screen or a projector.

Here’s what you should do:

1. Clone the image – so that we have two identical images.

2. Crop the second image (filter “Crop”) so that the remaining part is the one to be retouched. If you miscalculate the dimensions, you can redo it anytime.

3. Edit the cropped image. The smaller the image, the faster the editing will go.

4. Select the first original image and apply the Collage Item With Border filter. Then use the edited image as a masking image. Visually determine the insert coordinates or depending on the crop according to the par. 2. Bring the frame thickness to zero, scale – 1.

 

       Note: if you do not remember the crop coordinates, you can find them by selecting the Crop line. The coordinates are the input parameters in the filter settings window. 

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5. Print out the image or save it to your computer.

 

         An edited image with a lot of derivatives. You need to change the input parameters of one of the first filters. The input parameters are unknown, they can only be determined by trial.

 

        If you change the input parameters of any filter, not only the current image is converted, but all the lower ones that are marked with a check mark.

        Thus, to speed up the conversion process, uncheck the filters that are below in the list and are not necessary in determining the required input parameters.

       You can try moving the image to the end of the list and then editing it. This method should be used with caution, since the chain of successive transformations will be broken.