Choosing picture resolution

When you are working in Adobe Photoshop it is always a good idea where your image is going to be display because if you know where your image is going then you know how large a file we need to work on.

In this video we are looking at three most common ways about presenting or sharing your images, the three categories are half tone continuous tone and screen. Look at half tone first when we talk about half tone we are talking about printing press half tone is not continuous tone but it might start with continuous tone image but along the way it is converted into a half tone pattern for the printing press.

This pattern is made up of dots some large and some small and you have series of dots for each CYMK with these dot patterns are printed they are overlaid one top of each other they actually creates the illusion of continuous tone but it is not effected in continuous image If you look any thing been printed like news paper or magazine especially when you see under loop or magnifying glass you will see individual dots so what resolution you need in order to convert your images form continuous tone image in Photoshop in order to go to printing press well it depends on line screen of the printer as general rule of thumb you needs two times line screen or LPI. LPI or line screen is going to be dependent on the paper you are going to print to. For example you are going to print newspaper you can’t print with very high line screen typically they use 85 LPI. Where else If you are printing high end magazine or book it might goes highest to 300 LPI. So as soon as you know about the paper you are printing to and then you work with your printer and then you come up with the line screen you need then you simply double that would be resolution you want in Photoshop. The second category is continuous tone and probably the most common example of that would be inject printer.

In inkjet printer usually needs a resolution in Photoshop 240 – 360 pixels per inch. What I recommend you print the same image to the same printer to 240 pixels per inch and 360 pixels per inch. 360 pixels per inch looks like a higher quality but it kind of drops off so you can see you have to see between 300 and 360 pixels per inch printer. Other continuous tone out put would be Photographic paper may be you are photographer you want to send some images to the lab then the lab should recommend the resolution they want their images become they optimize their printing process and they know exactly the quality resolution of the image you need to send them to achieve the results to look good on that photographic paper it’s typically around 300 pixels per inch. Now backing up for a moment for inkjet printers we do call them continuous tone but they are in fact series of dots but it is not the same dot pattern that we previous discussed in half tone pattern that you would use to the printing press. Finally we talk about to display our images to screen or monitor, tablet or may be projector in this case the actual resolution of the file does not matter you can have a resolution of 72 pixels per inch or 96 pixels per inch 300 that doesn’t matter what matter is total pixel count each one of these devices can display a set number of pixels and you want to make sure your image is large enough the correct size to display on that device.

 

 

 

 

 

 

 

 

 

 


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