HDR 文件包含 32 位浮点光数据——从漆黑到过曝的每一档亮度都同时呈现。JPG 格式无法容纳所有这些数据。色调映射决定显示哪些内容；这款转换器会在浏览器中完成这项工作。
或者将图片拖放到这里。
支持JPG, JPEG, PNG, WEBP, SVG, GIF, HEIC, HEIF, BMP, TIFF, HDR, JP2, RAF, PSD, CR3, DNG, APNG, AVIF, AVI, ESP, EXR, J2C, J2K, JXL, PFM, PNM, PPM, PSB, SGI, MPEG, PDF
导入来自 3D 渲染软件、HDRI Haven 或 HDR 全景拍摄的 Radiance RGBE (.hdr) 文件。Cinema 4D、Blender 和 Maya 导出的 HDRI 文件均可使用。
使用 Reinhard 色调映射运算符将浮点亮度值映射到 8 位 JPG 范围——这是一种感知平衡的算法，可以保留阴影和高光中的细节。
输出为可查看的 8 位 JPG 文件。所有视觉细节均被压缩至 sRGB 色域。请保留原始 .hdr 文件用于生产用途；此 JPG 文件仅用于预览和分享。
Convert HDR to JPG for better compatibility and optimization
Improved file compatibility and optimized performance
Professional-grade conversion with quality preservation
excellent for photos with advanced JPG encoding
Perfect for photography, web images, social media
Handles high dynamic range, extended color gamut, professional from HDR files
感知色调映射弥合了10万倍动态范围的差距
Radiance RGBE image format
Joint Photographic Experts Group JFIF format
Note, JPG is a lossy compression. In addition, you cannot create black and white images with JPG nor can you save transparency. Requires jpegsrc.v8c.tar.gz. You can set quality scaling for luminance and chrominance separately (e.g. -quality 90,70). You can optionally define the DCT method, for example to specify the float method, use -define jpeg:dct-method=float. By default we compute optimal Huffman coding tables. Specify -define jpeg:optimize-coding=false to use the default Huffman tables. Two other options include -define jpeg:block-smoothing and -define jpeg:fancy-upsampling. Set the sampling factor with -define jpeg:sampling-factor. You can size the image with jpeg:size, for example -define jpeg:size=128x128. To restrict the maximum file size, use jpeg:extent, for example -define jpeg:extent=400KB. To define one or more custom quantization tables, use -define jpeg:q-table=filename. These values are multiplied by -quality argument divided by 100.0. To avoid reading a particular associated image profile, use -define profile:skip=name (e.g. profile:skip=ICC).
色调映射算法、质量和HDR保存。
