The pixels a browser will let you touch directly. These articles use the canvas to measure a picture, to redraw it, or to build something that never existed as a file, and none of it leaves the tab.
Photo Editing
Spend your JPEG bits where the eye looks, not evenly across the frame
An encoder gives the hedge behind your subject as many bits as the subject. A saliency model knows better, but a browser will not let you set quality per region, so the encoder is not steered: its input is prepared instead. On the sample that was 41 per cent off the file at an unchanged quality setting.
Black out every piece of text in a screenshot before you share it
A tool that guesses which text is sensitive will miss the one that mattered. This one covers every text field it finds and lets you click back what can stay. It also refuses to default to a blur, because blurring and pixelation can be undone, and there is published work showing exactly how.
Get a depth map from any photo and use it for real lens blur
A cutout blur draws a line and blurs one side of it, which is a thing no lens has ever done. A depth model gives every pixel a distance instead, so sharpness can fall away gradually the way it does optically. The map is a downloadable asset in its own right, and none of it leaves your browser.
Remove an unwanted object from a photo without uploading it anywhere
A clone tool copies pixels from elsewhere. An inpainting model predicts what should have been behind the thing you removed, which is a different question with a much better answer on grass, hedges and brickwork. It runs in your browser, and the rest of the photograph comes back byte for byte unchanged.
Perspective Correction: Four Corners and One Matrix Put It Straight
A photo taken at an angle is a projective map, not an affine one, which is why cropping and rotating cannot repair it. Four corners supply the eight numbers that can, and the geometry of the vanishing points can even hand back the object's true aspect ratio.
Every Character Counter for Meta Descriptions Is Wrong
A character counter says two strings are the same length. A search result says one fits and the other does not. Search engines truncate by pixel width in a specific font, and the numbers are further apart than anyone expects.
Making a Share Card That Does Not Look Like an Accident
The tag is rarely the problem. The picture is. Draw a 1200 by 630 card in the page, then work through the crops, the floors and ceilings the platforms enforce, and the design rules that survive being seen on a phone.
Every static graphic on a page is a snapshot of what was true when somebody exported it. There is a whole category of quiet wrongness that follows from that.
Blend Modes, Actually Explained: Six Formulas Worth Knowing
Most people click through the list until something looks nice. There is a small amount of maths underneath that turns the whole menu into a set of tools.
