BengalDeltaFish: A Local Dataset for Fish Detection in Bangladeshi Markets

"BengalDeltaFish" dataset contains 4560 annotated images of different fish species. The images were captured using the main cameras of three different smartphone devices. Data Source Location: Natun Bazar Kacha Bazar, Dhaka (coordinates: 23.798456569425063, 90.42559839707305) Fashertek Hazi Market, Dhaka (coordinates: 23.800797942244163, 90.43089556976807) Kawran Bazar, Dhaka (coordinates: 23.752118151441238, 90.39410478440936) Tongi Wholesale Fish Market, Abdullapur (coordinates: 23.88111410293438, 90.3996331962504) Fateh Ali Bazaar, Bogura (coordinates: 24.85118685050941, 89.37440032033948) Chashi Bazar Fish Market, Bogura (coordinates: 24.85131529709128, 89.37590749259026) Sherpur Bikal Bazaar, Bogura (coordinates: 24.670902763342134, 89.4182029300077) The fish images were captured in different local markets, maintaining the actual settings and environment to preserve factors such as variations in appearance and lighting conditions. Heavily overlapping fish, blurry/low-quality images (such as out-of-focus or distorted images) that could reduce model performance were excluded. Preprocessing: Auto-Orient Applied, Resize Fit within 640x640 Dataset Split: Train Set 70% 3193 Images, Valid Set 20% 912 Images, Test Set 10% 455 Images孟加拉三角洲鱼类（BengalDeltaFish）数据集包含4560张标注有不同鱼类物种的图像，所有图像均由三款不同智能手机的主摄采集获得。 数据采集地点： 达卡市纳通巴扎尔卡查巴扎尔（坐标：23.798456569425063, 90.42559839707305） 达卡市法谢特克哈齐市场（坐标：23.800797942244163, 90.43089556976807） 达卡市考兰巴扎尔（坐标：23.752118151441238, 90.39410478440936） 通吉市阿卜杜拉普尔通吉批发鱼市场（坐标：23.88111410293438, 90.3996331962504） 博格拉市法特阿里巴扎尔（坐标：24.85118685050941, 89.37440032033948） 博格拉市查希巴扎尔鱼市场（坐标：24.85131529709128, 89.37590749259026） 博格拉市谢尔普尔比卡尔巴扎尔（坐标：24.670902763342134, 89.4182029300077） 本次鱼类图像采集于当地多家农贸市场，全程保留真实场景与环境，以留存外观差异、光照条件变化等真实采集因素。为避免降低模型性能，诸如鱼类严重重叠、模糊或低质量（如失焦或畸变）的图像均已被剔除。 预处理操作：已应用自动定向（Auto-Orient）调整，将图像缩放适配至640×640分辨率以内。 数据集划分：训练集占比70%，共3193张图像；验证集占比20%，共912张图像；测试集占比10%，共455张图像。