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An image file format is a standard method for organizing and storing images on devices like computers, tablets, and smartphones. Digital images store image data in a 2-dimensional grid of pixels where each pixel is a representation of color in terms of a number of bits. Image file types are classified into vector image formats and raster image formats. 3D Images are another type of vector image file format that is used for managing 3D images.

Raster Graphics are digital images that comprise pixels data for the representation of colors. These are the most common image types for graphics used for the web as well as digital photos. Some of the raster images can be compressed to reduce image file size. Common raster image file extensions and their file formats include BMP (Bitmap image file), PNG (Portable Network Graphics), and GIF (Graphics Interchange File).

Vector images are defined by 2D points, instead of pixels, which are connected to give a geometric shape to the image. The points have properties that define the direction of paths, color, shape, curve, thickness, and fill. Common vector image file extensions and their file formats include SVG (Scalable Vector Graphics), EPS (Encapsulated PostScript language), and PDF (Portable Document Format).

Converting an image into a PDF file is a common use case for example when you need to create a PDF document from a scanned paper. GroupDocs.Conversion allows resolving this task easily and intuitively just using a few lines of Java code as described below:

1. Create an instance of the Converter class and pass the source JPG file path as a constructor parameter. You may specify absolute or relative file paths as per your requirements.
2. Create an instance of the PdfConvertOptions class.
3. Call the convert method and pass the filename for the converted PDF file and the PdfConvertOptions object from the previous step as parameters.

import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.PdfConvertOptions;
...
// Load the source JPG file
Converter converter = new Converter("sample.jpg");
// Set the convert options for PDF format
PdfConvertOptions options = new PdfConvertOptions();
// Convert to PDF format
converter.convert("converted.pdf", options);

NOTE: The code example above is the same for other image formats into PDF conversion, the only difference - you have to provide the file name with the appropriate extension.

If you need to get data from your previous tax returns into Excel and you only have printed copies just take a picture of each one and convert these images into XLS/XLSX workbook.

import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.SpreadsheetConvertOptions;
...
// Load the source JPG file
Converter converter = new Converter("sample.jpg");
SpreadsheetConvertOptions options = new SpreadsheetConvertOptions();
// Save converted XLS file
converter.convert("jpg-converted-to.xlsx", options);

import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.SpreadsheetConvertOptions;
...
// Load the source PNG  file
Converter converter = new Converter("sample.png");
SpreadsheetConvertOptions options = new SpreadsheetConvertOptions();
// Save converted XLS file
converter.convert("png-converted-to.xlsx", options);

If you need to make a PowerPoint presentation from images of PNG, JPG/JPEG, TIF/TIFF, GIF, or other formats, a possible solution is to convert them programmatically.
Let’s review several code examples in Java language below and see how to transform an image into a PPT/PPTX presentation.

import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.PresentationConvertOptions;
...
// Load the source JPG file
Converter converter = new Converter("sample.jpg");
PresentationConvertOptions options = new PresentationConvertOptions();
// Save converted PPT file  
converter.convert("jpg-converted-to.pptx", options);

import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.PresentationConvertOptions;
...
// Load the source PNG file
Converter converter = new Converter("sample.png");
PresentationConvertOptions options = new PresentationConvertOptions();
// Save converted PPT file
converter.convert("png-converted-to.pptx", options);

To easily transform images into Microsoft Word documents programmatically, please check the following code snippet in Java:

import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.WordProcessingConvertOptions;
...
// Load the source JPG file
Converter converter = new Converter("sample.jpg");
WordProcessingConvertOptions options = new WordProcessingConvertOptions();
// Save converted DOCX file
converter.convert("jpg-converted-to.docx", options);