JPG and JPEG stand both for an image format proposed and supported by the Joint Photographic Experts Group. The two terms have the same meaning and are interchangeable. To read on, check out Difference between JPG and JPEG. The reason for the different file extensions dates back to the early versions of Windows. The original … Read more
I try to avoid text only answers; including code is best practice but the question about storing images comes up frequently and it’s not really covered in the documentation so I thought it should be addressed at a high level. Generally speaking, Realm is not a solution for storing blob type data – images, pdf’s … Read more
Yes, it is now possible with ImageMagick 6.8.9-10 and newer, see here. So, if we start with this image: we can get the components labelled and also the bounding boxes, centroids and other statistics for each blob or component like this: convert input.png \ -colorspace gray -negate -threshold 10% \ -define connected-components:verbose=true \ -define connected-components:area-threshold=100 … Read more
OK, this is quite a complex question. I’ll try and break this up into separate parts and will answer each question separately. Question #1 blockproc can be used to implement my function on a sliding window using the BorderSize and TrimBorder arguments. B = blockproc(A,[64,64],fun,’BorderSize’,[5,5], ‘TrimBorder’, ‘false’); I realize that this creates a block of … Read more
There are ways to deal with this. Some on the matching part to avoid the unskew operation itself like this: OCR and character similarity But you want to unskew so: detect the rotation angle/skew slope Obtain bounding box, then cast vertical scan lines and remember first hit point and last regress line through all of … Read more
See if I understood what you want. Suppose your image coordinates go from 0 to 1. If you do: r = Sqrt[(x – .5)^2 + (y – .5)^2] a = ArcTan[x – .5, y – .5] rn = r^2.5/.5 And then remap your pixels according to: x -> rn*Cos[a] + .5 y -> rn*Sin[a] + … Read more
imRGB was a 3D matrix (height x width x 3). Now imGray is a 2D matrix in which there are no colors, only a “luminosity” value. So matplotlib applied a colormap by default. Read this page and try to apply a grayscale colormap or a different colormap, check the results. plt.imshow(imGray, cmap=”gray”) Use this page … Read more
I believe the only way to do that is to make multiple calls to the webservice specifying the ‘start’ parameter. http://ajax.googleapis.com/ajax/services/search/images?v=1.0&q=Apple+Cake&start=4 The start parameter is the 0-based index into the search results. So in this example, it would return images 4..7. You can also add the parameter rsz=[1-8]. The default value is 4. That’s why … Read more
Just give your QImage the desired size. The SVG renderer will scale to fit the whole image. #include <QApplication> #include <QSvgRenderer> #include <QPainter> #include <QImage> // In your .pro file: // QT += svg int main(int argc, char **argv) { // A QApplication instance is necessary if fonts are used in the SVG QApplication app(argc, … Read more
Yeah, you could use it with the layout=fill option you mentioned. On this case, you’re gonna need to set an “aspect ratio” for your images <div style={{ position: “relative”, width: “100%”, paddingBottom: “20%” }} > <Image alt=”Image Alt” src=”/image.jpg” layout=”fill” objectFit=”contain” // Scale your image down to fit into the container /> </div> You can … Read more