I want to insert some pictures in a Writer document. I have prepared the images in Photoshop Elements, and with a 300PPI resolution they have the correct size in cm. Since I want it to be a nice printable document, this is the resolution I want to use.
When I insert the image, Writer will assume a 96dpi resolution, and a picture size as big as possible on my page. I then can adjust the size in cm, to get the picture size I need.
With Compress Graphic I can then change the DPI setting, but I notice that Writer will do all kind of recalculations to get to the result that I want. Writer first recalculates the original image to 96DPI and the cm size I want, and then recalculates it again to 300DPI. That will not add to the quality of the picture.
Writer should have the option to calculate the size of the image in cm, just by setting the desired DPI setting, and without recalculating the image. So if the image width is 1500 pixels, and I set the resolution to 300DPI, the width on paper will be 5 inch or 12.7cm. Simple and straightforward, no need to touch the actual pixels.
After all, programs like Photoshop are more suitable for these kind of calculations, and if you have such a program you will prepare your images there. Writer then shouldn’t touch the pixels any more.