![]() ![]() Step 6: To save the resized image, select File on the menu bar. Step 5: Click the blue OK button to confirm the new size. Alternatively, you can select a preset size by clicking the arrows next to Fit Into. You may need to switch the size type, like changing from inches to pixels, as shown above. Step 4: Enter the width and height information. Step 3: Select Adjust Size on the drop-down menu. If Preview is not your default image viewer, select Open With followed by Preview instead. Step 1: Right-click on the image and select Open. Step 6: Click the purple Save Resized Copy button. If the aspect ratio doesn’t matter, don’t check the box, and enter the numbers in both boxes. Step 5: To keep the aspect ratio, click the box next to Maintain Aspect Ratio.Īs you enter a number into one of the boxes, the other box will automatically adjust its number in proportion to the number you just entered. Another pop-up window appears (shown on the right). ![]() Otherwise, click Define Custom Dimensions for a specific size. Select one of the three preset sizes (shown on the left). Step 3: Select Resize on the drop-down menu. How to print from a Chromebook - the easy way In order to keep the aspect ratio of the div and prevent its content from stretching it, you need to add an absolutely positioned child and stretch it to the edges of the wrapper with: div.How to take a screenshot on your Mac: the best methods in 2023 Padding-bottom values for other aspect ratios and 100% width : aspect ratio | padding-bottom value The percentage is calculated with respect to the width of the generated box's containing block (source: w3.org, emphasis mine) This relies on the fact that for padding : It will result in a with height equal to 75% of the width of its container (a 4:3 aspect ratio). $ convert sq.jpg -resize 200x200 -background skyblue -gravity center -extent 200x200 scaled-sq-im.jpg $ convert h.jpg -resize 200x200 -background skyblue -gravity center -extent 200x200 scaled-h-im.jpg $ convert v.jpg -resize 200x200 -background skyblue -gravity center -extent 200x200 scaled-v-im.jpg See here for descriptions of the resizing commands. It's very easy to do what you want with a single command. ImageMagick is a simple, but well-built command-line interface to do basic image processing. Sq_img = cv2.imread('sq.jpg') # square image H_img = cv2.imread('h.jpg') # horizontal image V_img = cv2.imread('v.jpg') # vertical image Scaled_img = cv2.copyMakeBorder(scaled_img, pad_top, pad_bot, pad_left, pad_right, borderType=cv2.BORDER_CONSTANT, value=padColor) Scaled_img = cv2.resize(img, (new_w, new_h), interpolation=interp) If len(img.shape) is 3 and not isinstance(padColor, (list, tuple, np.ndarray)): # color image but only one color provided Pad_left, pad_right, pad_top, pad_bot = 0, 0, 0, 0 Pad_left, pad_right = np.floor(pad_horz).astype(int), np.ceil(pad_horz).astype(int) New_w = np.round(new_h*aspect).astype(int) Pad_top, pad_bot = np.floor(pad_vert).astype(int), np.ceil(pad_vert).astype(int) New_h = np.round(new_w/aspect).astype(int) So, after resizing we'll end up with a 1000xN or Nx1000 image (where N sh or w > sw: # shrinking imageĪspect = w/h # if on Python 2, you might need to cast as a float: float(w)/h To shrink an image, it will generally look best with CV_INTER_AREA interpolation, whereas to enlarge an image, it will generally look best with CV_INTER_CUBIC (slow) or CV_INTER_LINEAR (faster but still looks OK). Note that if aspect is greater than 1, then the image is oriented horizontally, while if it's less than 1, the image is oriented vertically (and is square if aspect = 1).ĭifferent interpolation methods will look better depending on whether you're stretching the image to a larger resolution, or scaling it down to a lower resolution. So the most robust way to do this is to find the aspect ratio and calculate what the smaller dimension would be when the bigger one is stretched to 1000. However, resize() requires that you put in either the destination size (in both dimensions) or the scaling (in both dimensions), so you can't just put one or the other in for 1000 and let it calculate the other for you. You can use resize() in OpenCV to resize the image up/down to the size you need. ![]()
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