computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Hi all- I am trying to create stimuli for a research study and need to control for the amount of one color in a display. I am creating various-sized circles that are either red or yellow on a black background. Is there a way to count the number of pixels of one color on the screen? If I use the magic wand and the shift key, I can select all the circles of one color, but it only gives me dimensions for the bounding rectangle, right? Is there a way to do this? THANK YOU! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Share Posted June 29, 2009 Hi all- I am trying to create stimuli for a research study and need to control for the amount of one color in a display. I am creating various-sized circles that are either red or yellow on a black background. Is there a way to count the number of pixels of one color on the screen? If I use the magic wand and the shift key, I can select all the circles of one color, but it only gives me dimensions for the bounding rectangle, right? Is there a way to do this? THANK YOU! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Hi all- I am trying to create stimuli for a research study and need to control for the amount of one color in a display. I am creating various-sized circles that are either red or yellow on a black background. Is there a way to count the number of pixels of one color on the screen? If I use the magic wand and the shift key, I can select all the circles of one color, but it only gives me dimensions for the bounding rectangle, right? Is there a way to do this? THANK YOU! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Hi all- I am trying to create stimuli for a research study and need to control for the amount of one color in a display. I am creating various-sized circles that are either red or yellow on a black background. Is there a way to count the number of pixels of one color on the screen? If I use the magic wand and the shift key, I can select all the circles of one color, but it only gives me dimensions for the bounding rectangle, right? Is there a way to do this? THANK YOU! Quote Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 WHen you have a selection active, the status bar will tell you the area and thus the number of pixels selected. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 WHen you have a selection active, the status bar will tell you the area and thus the number of pixels selected. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 WHen you have a selection active, the status bar will tell you the area and thus the number of pixels selected. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 WHen you have a selection active, the status bar will tell you the area and thus the number of pixels selected. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? THANKS! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? THANKS! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? THANKS! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? THANKS! Quote Link to comment Share on other sites More sharing options...
Rick Brewster Posted June 29, 2009 Share Posted June 29, 2009 Depending on the DPI of the image you're working with, it simply may not be possible to make a circle of exactly 6.0 cm^2. Quote The Paint.NET Blog: https://blog.getpaint.net/ Donations are always appreciated! https://www.getpaint.net/donate.html Link to comment Share on other sites More sharing options...
Rick Brewster Posted June 29, 2009 Share Posted June 29, 2009 Depending on the DPI of the image you're working with, it simply may not be possible to make a circle of exactly 6.0 cm^2. Quote The Paint.NET Blog: https://blog.getpaint.net/ Donations are always appreciated! https://www.getpaint.net/donate.html Link to comment Share on other sites More sharing options...
Rick Brewster Posted June 29, 2009 Share Posted June 29, 2009 Depending on the DPI of the image you're working with, it simply may not be possible to make a circle of exactly 6.0 cm^2. Quote The Paint.NET Blog: https://blog.getpaint.net/ Donations are always appreciated! https://www.getpaint.net/donate.html Link to comment Share on other sites More sharing options...
Rick Brewster Posted June 29, 2009 Share Posted June 29, 2009 Depending on the DPI of the image you're working with, it simply may not be possible to make a circle of exactly 6.0 cm^2. Quote The Paint.NET Blog: https://blog.getpaint.net/ Donations are always appreciated! https://www.getpaint.net/donate.html Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles.I believe I had the same misconception at one point. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? Clarifying what Rick said, to create a circle of A = 6cm², you'd need a radius of 1.382cm, or .544". At the default image resolution of 96dpi, that's 52.232 pixels. Paint.NET does not support soft selections, so it can't have only a fraction of a pixel selected; it's either selected or it's not. So you can't get exactly 6cm² at 96dpi. Also due to the lack of soft selections, the formula A=πr² doesn't really apply anyway. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles.I believe I had the same misconception at one point. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? Clarifying what Rick said, to create a circle of A = 6cm², you'd need a radius of 1.382cm, or .544". At the default image resolution of 96dpi, that's 52.232 pixels. Paint.NET does not support soft selections, so it can't have only a fraction of a pixel selected; it's either selected or it's not. So you can't get exactly 6cm² at 96dpi. Also due to the lack of soft selections, the formula A=πr² doesn't really apply anyway. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles.I believe I had the same misconception at one point. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? Clarifying what Rick said, to create a circle of A = 6cm², you'd need a radius of 1.382cm, or .544". At the default image resolution of 96dpi, that's 52.232 pixels. Paint.NET does not support soft selections, so it can't have only a fraction of a pixel selected; it's either selected or it's not. So you can't get exactly 6cm² at 96dpi. Also due to the lack of soft selections, the formula A=πr² doesn't really apply anyway. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
pyrochild Posted June 29, 2009 Share Posted June 29, 2009 Oh gosh - you are right. Thanks - I was thinking it was giving me the area of the bounding rectangle of the selected circles.I believe I had the same misconception at one point. One more quick question, is there a way to type in the dimensions of a desired circle? I need circles of various exact sizes and drawing the circles allows me to get close to the desired area but not exact (for instance, I need a circle with an area of 6 cm sq and I can get it to 6.05 or 5.97....) Any suggestions? Clarifying what Rick said, to create a circle of A = 6cm², you'd need a radius of 1.382cm, or .544". At the default image resolution of 96dpi, that's 52.232 pixels. Paint.NET does not support soft selections, so it can't have only a fraction of a pixel selected; it's either selected or it's not. So you can't get exactly 6cm² at 96dpi. Also due to the lack of soft selections, the formula A=πr² doesn't really apply anyway. Quote ambigram signature by Kemaru [i write plugins and stuff] If you like a post, upvote it! Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Thank you both so much. I really appreciate your help! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Thank you both so much. I really appreciate your help! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Thank you both so much. I really appreciate your help! Quote Link to comment Share on other sites More sharing options...
computerchica Posted June 29, 2009 Author Share Posted June 29, 2009 Thank you both so much. I really appreciate your help! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.