 Constance S. Hudson |
How to Determine Actual (Real LIfe) Canvas Size I am a portrait artist and I use Photoshop to edit my digital images. I use Photoshop to enhance and repair, swap body parts, etc. I need to know a way to figure the actual canvas size (that I will later physically stretch) using the head size in my (printed photograph) or the head size in the image that is opened in Photoshop as the base measurement to figure the overall size of the canvas. Is there a video or a tape or article that I can purchase, or a link on the internet, that explains this technique or any technique to use in Photoshop to configure the canvas size using the head size in image as the basis for the final measurements. I need very specific instructions. My old fashion way to determine a canvas size is explained below which may help someone to understand what I am trying to do in Photoshop. I am very tired of using my old fashion way of determining my canvas size which is to measure the head on my printed photograph, and then manually count how many heads make up the photograph. (If the little photo head is for example one inch then I figure out how many inches are in the photograph - or how many heads are in the photograph horizontally and veritcally.) I then multiply this figure by the size head I want my client's head to be, giving me the canvas size. This is not very efficient for me as usually the heads is not an inch in the photograph and also this method isn't accurate. Constance
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- Gregory LaGrange Contact Gregory LaGrange Gregory LaGrange's Gallery |
Don't feel stupid, and I still don't really get what you want to do, so I'll guess a few answers and maybe you can tell me or clear me up on it some more. But anyway, one thing I'll say you may know, but it may help. Ctrl-R on a pc will put a ruler around the top and side of the image, lets you see where something is inch-wise. Is what you're wanting to do is make a large print so that the person's head comes out a certain size,(life size maybe)? If you did cross multiplication with fractions for proportions, but use centimeters, I think you'd get pretty close to getting the right size. But is sounds like you've gone that way and don't like it, so you could open you image and ctrl-R the ruler around it. Select the pointer in the tool box, place at the top of head. Where ever you place the poiter you'll see a line in the ruler on the horiz and vert side designating which inch you're at. So just see how big the head is by measuring the top to the chin. Then you could increase the image size, and keep taking a measurement until you get to an image size that gives you the head size you want. You could also add a step where you get more specific with the head size by once you get close to what you want, use crop tool and crop around just the head. Then go to image size and see what size the head is. If it's not right, click cancel, then click ctrl-Z to undo the crop to get your picture back. Then increase the image size, and crop again. If it's right, ctrl-Z again and check the what size the whole picture ended up being. But cross multiplying would do it in one step. 2.5cm head on the picture, a 4x6 is 15.2cm. If you want a final head to be 30cm, you have 2.5/15.2=30/x Then you have (2.5)(x)=(15.2)(30) 456 divided by 2.5 leaves a 182.4cm canvas. convert to inches
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Constance S. Hudson |
Sounds like you are. The size I usually make a head in a portrait is 7-1/2 inches. If the head in my image is 1/2 inch from botton of chin to top of hair, I then figure how many little heads are in the photograph, starting at the top, ending at the bottom and also from side to side. Let's say I haved 6 little heads from top to bottom and 4 little heads from side to side. I then multiply 6 times 7-1/5 for the canvas height and 4 times 7-1/5 for the canvas width. I would then stretch a canvas 45 incheds by 30. (this would in fact be the size I would use for a child standing). Here is the problem. It is not accurate. I usually have a head size in a printed photo that isn't a half or an inch. It is always hard to work with - the dimension. I am going to try to copy and paste what another artist (Sanden) published as to how he does what what I am trying to do in Photoshop. In the meantime I will study what you have suggested and let you know. I cannot thank you enough! Whoops I have to send it as a jpeg I think - the scan from Sanden's book. Constance
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Constance S. Hudson |
Constance
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Constance S. Hudson |
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Constance S. Hudson |
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Constance S. Hudson |
I cannot figure out how to upload the image (a scan of an article by the artist, Sanden) but I wanted to tell you that I use a Mac (the new i-Mac) for printing my images and my PC for just about everything else. I am new to Mac but I love it and have Photoshop on both computers. Wish I had started with a Mac.
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Constance S. Hudson |
Hi Greggory, Just to let you know, with your instructions and my feeble efforts I can now figure the canvas size using a head size. I was able to get the head size I wanted by doing what you told me to do! Thank you thank you!!!!! Constance
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- Gregory LaGrange Contact Gregory LaGrange Gregory LaGrange's Gallery |
cool. Macs have a key that's a counterpart just like ctrl-R is for a pc, I just can't remember what it is. Thinks it's command key. anyway, you should only need to use one side length if you go the cross multiply way.
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