Glossary

Term	Practical meaning
Pixel	A unit of a digital image. 1600 × 1200 gives its width and height in pixels.
Dimensions	Width and height, not file size or the physical size of a print.
Resolution, in these guides	The number or arrangement of pixels. Yagua’s size controls use pixels or percentages, not a print DPI editor.
File size	Storage space measured in bytes, KB, or MB. Images with the same dimensions can have different file sizes.
Aspect ratio	The proportion between width and height. 16:9 can mean 1600 × 900 or 1280 × 720.
Resize	Change the number of pixels. Reducing or enlarging an image is possible; enlarging does not recover lost detail.
Crop	Keep an area and remove edges in the copy. Yagua crops from the center according to a ratio.
Canvas	The final surface on which the photo is placed; it can add margins or a background.
Preset	A predefined group of values. Size presets set dimensions; watermark presets change size, opacity, and position.
Field placeholder	An example or hint inside an empty input. A gray 1080 does not mean you have entered 1080.
Batch	Files processed with the same options. It is not an automatic sequence between tools.
Format	A way to store an image: JPEG, PNG, WebP, TIFF, and others. Changing the extension does not convert its contents.
Codec	A component that reads or writes a format. Availability can vary by package and platform.
Lossy compression	Discards information to save space. Repeating it can accumulate degradation.
Quality	An encoder parameter, not a universal percentage of fidelity or savings.
Transparency / alpha	A channel indicating which areas let the background show through. JPEG does not retain it.
Opacity	How visible a layer is. Watermark combines it with the logo’s transparency.
Palette	A selection of colors. Extract Palette finds representative tones; a 256-color PNG also uses a limited palette.
HEX	A color notation such as #336699.
RGB	Red, green, and blue components, for example rgb(51, 102, 153).
HSL	Hue, saturation, and lightness, useful for expressing color variations.
Color profile / ICC	Information that helps interpret colors. Not every processing operation preserves it.
EXIF	Photographic metadata such as camera, exposure, date, or orientation. It is not every kind of information a file can contain.
GPS	Location data: latitude, longitude, and, when present, altitude or direction.
EXIF orientation	An instruction for displaying an image. Changing pixels and changing this instruction are not always the same operation.
XMP / IPTC	Other metadata families. Do not assume Yagua’s EXIF viewer lists all their contents.
OCR	Optical character recognition: extracting text from an image. It does not guarantee accuracy or automatically recover document layout.
AI model	Downloaded data an engine needs to recognize text or separate backgrounds. It is not a user’s photo.
Cache	Stored data for reuse, such as downloaded models. It is not a backup of your results.
LQIP	A small, low-quality image used as a placeholder while a web image loads.
Base64	A representation of bytes using text characters. It is not encryption and usually increases size compared with the represented bytes.
Data URI	A URL containing embedded content, such as data:image/jpeg;base64,..., including its MIME type and data.
MIME	A content type identifier, such as image/jpeg. It must match the actual data, not just the filename.
HTML	Web page markup. Yagua can output an image tag ready to adapt.
CSS	Web presentation rules. Yagua can produce a background rule or color values to adapt.
JSON	A structured text format useful for integrating data with other tools.
UTF-8	A text encoding that represents Spanish and other languages.
Name conflict	The destination name is already taken. Batch exporters usually add a counter; Batch Rename skips conflicting changes.
Overwrite	Save over an existing file. The EXIF editor does this after confirmation.
Prerelease / RC	A test release, distinct from a release published as stable.
AppImage	A Linux executable package; it may use FUSE or extraction depending on its runtime.
Portable	A distribution extracted into a folder without an installer. This does not guarantee that preferences and models stay in that folder.

Two common distinctions

A 1600 × 1200 image can take more space than a 4000 × 3000 image: contents, format, and compression all matter. Reducing pixels and reducing bytes are related but different goals.

A transparent PNG converted to Base64 in Yagua stops being that PNG: the current mode re-encodes it as JPEG without alpha, then represents that JPEG as text. For a small thumbnail, use the same tool’s LQIP mode instead.

• Formats and limits
• Introduction
• Common problems