![]() The PPI will be 200, providing you with good quality photos. So, for example, if you want to print a 4-inch-by-6-inch image, and your pixel count is 800 x 1200, you need to divide 800 (the pixel height) by 4 (the photo height) and then divide 1200 (the pixel width) by 6 (the photo width). Calculating PPI The basic equation for calculating PPI is: PPI = width(pixels)/ width of image (inches) PPI = height(pixels)/ height of image (inches).Once you have these two pieces of information (the print size and the pixel count), you can calculate the PPI and determine the resolution of the image. ![]() The Properties dialog box that opens will provide you with the details of the photo, including the pixel count. Select Properties from the dropdown menu. To find the pixel count on your photo, open the image on your desktop computer. Then check the pixels of the image you want to print. ![]() Size and Pixel Count In order to print a high quality photo, you must first determine the size you want to print.A general rule of thumb is to try to have a PPI of between 200 and 400. The more pixels you have per inch (centimeter), the sharper your photos will be. The pixels on your digital camera or computer screen get converted into dots on the printed photo. What is PPI? The first step to understanding how to print high-quality photos is to understand pixels per inch (PPI).Size of image in kilo bytes = 48 kb (approx). Number of cols = ? Solving first part: Solving 2nd part: Resolve pixel resolution to calculate the dimensions of imageīits per pixel: grayscale image = 8bpp Find:.If you are given an image with aspect ratio of 6:2 of an image of pixel resolution of 480000 pixels given the image is an gray scale image.Īnd you are asked to calculate two things. With the aspect ratio, you can calculate the dimensions of the image along with the size of the image. You have probably seen aspect ratios in the video players, where you can adjust the video according to your screen resolution.įinding the dimensions of the image from aspect ratio:Īspect ratio tells us many things. Original imageĬhanging the rows and columns by maintain the aspect ratio in MS Paint. If we wish to make is smaller, and the condition is that the quality remains the same or in other way the image does not get distorted, here how it happens. This is a sample image, which has 100 rows and 100 columns. It does not let the image to get distorted when aspect ratio is increased. The common aspect ratios are:ġ.33:1, 1.37:1, 1.43:1, 1.50:1, 1.56:1, 1.66:1, 1.75:1, 1.78:1, 1.85:1, 2.00:1, e.t.c AdvantageĪspect ratio maintains a balance between the appearance of an image on the screen, means it maintains a ratio between horizontal and vertical pixels. This ratio differs in different images, and in different screens. It is commonly explained as two numbers separated by a colon (8:9). ![]() Aspect ratioĪnother important concept with the pixel resolution is aspect ratio.Īspect ratio is the ratio between width of an image and the height of an image. Its pixel resolution = 2500 * 3192 = 7982350 bytes.ĭividing it by 1 million = 7.9 = 8 mega pixel (approximately). Lets say we have an image of dimension: 2500 X 3192. Size = pixel resolution X bpp ( bits per pixel ) Calculating the mega pixels of the camera The size of an image can be defined by its pixel resolution. We can calculate mega pixels of a camera using pixel resolution.Ĭolumn pixels (width ) X row pixels ( height ) / 1 Million. We can define pixel resolution of an image as 4500 X 5500. We can say that the higher is the pixel resolution, the higher is the quality of the image. The first number the width of the picture, or the pixels across columns, and the second number is height of the picture, or the pixels across its width. If we define resolution as the total number of pixels, then pixel resolution can be defined with set of two numbers. If an image has M rows and N columns, then its resolution can be defined as M X N. In pixel resolution, the term resolution refers to the total number of count of pixels in an digital image. You have probably seen that in your own computer settings, you have monitor resolution of 800 x 600, 640 x 480 e.t.c Out of which we are going to discuss pixel resolution. Such as pixel resolution, spatial resolution, temporal resolution, spectral resolution. The resolution can be defined in many ways. Now since we have defined a pixel, we are going to define what is resolution. We also defined that a pixel can store a value proportional to the light intensity at that particular location. We have already defined a pixel in our tutorial of concept of pixel, in which we define a pixel as the smallest element of an image. Before we define pixel resolution, it is necessary to define a pixel. ![]()
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